Method for manufacturing articles using foam particles
阅读说明：本技术 利用泡沫颗粒制造物品的方法 (Method for manufacturing articles using foam particles ) 是由 杰伊·康斯坦丁诺 哈利·多雷穆斯 路易斯·弗尔加 布兰登·克瓦姆 丹尼斯·席勒 于 2018-06-01 设计创作，主要内容包括：提供了用于制造鞋类物品的方法。在各个方面中,该方法包括利用使用泡沫颗粒的添加制造方法。在一些方面中,所公开的方法包括将结合材料选择性地沉积在目标区域中的泡沫颗粒上,使得结合材料用结合材料包覆泡沫颗粒的界定表面的至少一部分。然后结合材料被固化以将目标区域中的泡沫颗粒彼此附连。在各个方面中,所公开的方法可以用于制造物品,该物品具有在泡沫颗粒之间不同的附连水平的子区域,并且从而产生具有不同性质诸如密度、弹性和/或弯曲模量的子区域。本摘要意图作为用于在特定领域中检索目的的浏览工具且不意图限制本公开内容。(Methods for manufacturing an article of footwear are provided. In various aspects, the method includes an additive manufacturing method that utilizes foam particles. In some aspects, the disclosed methods include selectively depositing a binding material on the foam particles in the target region such that the binding material coats at least a portion of a defined surface of the foam particles with the binding material. The bonding material is then cured to attach the foam particles in the target area to one another. In various aspects, the disclosed methods may be used to manufacture articles having sub-regions with different levels of attachment between foam particles, and thereby produce sub-regions having different properties such as density, elasticity, and/or flexural modulus. This abstract is intended as a browsing tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.)
1. A method of forming an article, the method comprising:
disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters;
depositing a binding material in a binding material target area, wherein the binding material target area comprises at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and
curing the deposited bonding material coating at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area.
2. The method of claim 1, wherein the curing comprises curing the deposited bonding material and bonding the deposited bonding material to at least a portion of the coated surface of the arranged plurality of foam particles.
3. The method of claim 1, wherein the curing comprises:
applying energy to the deposited bonding material and the arranged plurality of foam particles in an amount and for a duration sufficient to soften the thermoplastic elastomer material of the coated at least a portion of the defined surface of the arranged plurality of foam particles; and
reducing the temperature of the region of the arranged plurality of foam particles to a temperature at or below which the softened thermoplastic elastomer material resolidifies;
thereby attaching at least a portion of the coated at least a portion of the defined surface of the arranged plurality of foam particles in the bonding material target area.
4. The method of claim 3, wherein the applying energy comprises applying energy to substantially all of the arranged plurality of foam particles.
5. The method of claim 3 or 4, wherein said applying energy comprises applying energy within the infrared spectrum.
6. The method of any one of claims 1-5, wherein the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and is
Wherein the curing comprises:
forming at least one chemical bond between the one or more monomers, the one or more polymers, or a combination thereof of the binding material; and/or
Forming at least one chemical bond between the coated at least a portion of the defined surface of the arranged plurality of foam particles in the binding material target area and the one or more monomers, the one or more polymers, or a combination thereof of the binding material;
thereby attaching at least a portion of the coated plurality of foam particles of the arrangement in the bonding material target area to each other or to uncoated foam particles.
7. The method of any one of claims 1-6, wherein depositing a binding material comprises depositing the binding material by spraying, misting, or a combination thereof;
wherein the bonding material comprises a solvent;
wherein the method further comprises, after the depositing, dissolving at least a portion of the defined surface of the arranged plurality of foam particles with the solvent to form a dissolved defined surface of the arranged foam particles; and is
Wherein the curing comprises, after the dissolving, removing at least a portion of the solvent of the bonding material and curing the at least a portion of the dissolved bounding surface of the arranged foam particles;
thereby attaching at least a portion of the arranged plurality of foam particles in the bonding material target area to each other or to uncoated foam particles.
8. The method of any of claims 1-7, wherein the depositing comprises depositing a first bonding material and a second bonding material;
wherein the first bonding material comprises a solvent,
wherein the second bonding material comprises a bonded thermoplastic elastomer material soluble in the solvent; and is
Wherein the curing comprises removing the solvent and curing the bonded thermoplastic elastomer material on at least a portion of the defined surface of the arranged foam particles;
thereby attaching at least a portion of the arranged plurality of foam particles in the bonding material target area to each other or to uncoated foam particles.
9. The method of any of claims 1-8, wherein the plurality of foam particles comprises foam particles having a density of about 0.1 grams per cubic centimeter to about 0.8 grams per cubic centimeter.
10. The method of any one of claims 1-9, wherein the plurality of foam particles have a bulk density of about 80 grams per liter to about 200 grams per liter.
11. The method according to any one of claims 1-10, wherein the thermoplastic elastomeric material is selected from the group consisting of thermoplastic polyurethane elastomers, thermoplastic polyurea elastomers, thermoplastic polyether elastomers, thermoplastic copolyether ester elastomers, thermoplastic polyamide elastomers, thermoplastic polystyrene elastomers, thermoplastic polyolefin elastomers, thermoplastic copolyether amide elastomers, thermoplastic styrene diene copolymer elastomers, thermoplastic styrene block copolymer elastomers, thermoplastic polyamide elastomers, thermoplastic polyimide elastomers, any copolymer thereof and any blend thereof.
12. The method according to any one of claims 1-12, wherein the thermoplastic elastomeric material is characterized by a melting temperature range of at least 10 degrees celsius in which both the first thermoplastic elastomeric material and the second thermoplastic elastomeric material exhibit softening and melting behavior as determined using differential scanning calorimetry.
13. An article manufactured by the method of any one of claims 1-12.
14. The article of claim 13, wherein the article is a component for manufacturing an article of footwear, an article of apparel, or an article of athletic equipment.
15. The article of claim 14, wherein the component used to manufacture the article of footwear, the article of apparel, or the article of athletic equipment is a cushioning element for the article of footwear.
16. The article of any one of claims 13-15, wherein the article is characterized by a plurality of sub-regions comprising a first sub-region characterized by a first property and a second sub-region characterized by a second property, wherein the first property is at least 10% greater than the second property, and wherein the first property and the second property are selected from the group consisting of flexural modulus, stiffness, bulk density, elasticity, and combinations thereof.
17. An article, comprising:
a structure formed of a plurality of attached foam particles, wherein
Each individual foam particle of the plurality of attached foam particles is formed of a thermoplastic elastomer material and includes one or more bonding regions on an outer surface of the individual foam particle that attach the individual foam particle to one or more adjacent foam particles,
the one or more adjacent foam particles comprise the thermoplastic elastomer material,
the bonded region comprising a portion of bonding material from the individual foam particle, a portion of bonding material from at least one of the one or more adjacent foam particles, a portion of the thermoplastic elastomer material from the individual foam particle mixed with a portion of the thermoplastic elastomer material from at least one of the one or more adjacent foam particles, or any combination thereof,
the structure formed by the plurality of attached foam particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure,
wherein, prior to attachment, at least 20% of the plurality of foam particles are spherical or ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, and at least 20% of the spherical or ellipsoidal foam particles in the structure retain a substantially spherical or ellipsoidal shape.
18. The article of claim 17, wherein the bonded region comprises dissolved and re-cured thermoplastic elastomer material from the individual foam particles, from the at least one of the one or more adjacent foam particles, or both.
19. The article of claim 17 or 18, wherein the bonded region comprises dissolved and resolidified binder material from the individual foam particles, from the at least one of the one or more adjacent foam particles, or both.
20. A method of manufacturing an article of footwear, comprising:
attaching an upper to a sole structure, wherein the sole structure includes a cushioning element that includes a structure formed from a plurality of attached foam particles, wherein
Each individual foam particle of the plurality of attached foam particles is formed of a thermoplastic elastomer material and includes one or more bonding regions on an outer surface of the individual foam particle that attach the individual foam particle to one or more adjacent foam particles,
the one or more adjacent foam particles comprise the thermoplastic elastomer material,
the bonded region comprising a portion of bonding material from the individual foam particle, a portion of bonding material from at least one of the one or more adjacent foam particles, a portion of the thermoplastic elastomer material from the individual foam particle mixed with a portion of the thermoplastic elastomer material from at least one of the one or more adjacent foam particles, or any combination thereof,
the structure formed by the plurality of attached foam particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure,
wherein, prior to attachment, at least 20% of the plurality of foam particles are spherical or ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, and at least 20% of the spherical or ellipsoidal foam particles in the structure retain a substantially spherical or ellipsoidal shape.
Technical Field
The present disclosure relates generally to methods of manufacturing articles using foam particles in additive manufacturing methods, and in particular, methods of manufacturing articles using foam particles in methods that include selective laser sintering techniques.
Background
The design of athletic equipment and apparel, as well as footwear, involves a variety of factors, from aesthetic aspects, to comfort and feel, to performance and durability. While design and fashion may change rapidly, the need for enhanced performance in the market is constant. To balance these needs, designers employ a variety of materials and designs for the various components that make up athletic equipment and apparel, as well as footwear.
Brief Description of Drawings
Further aspects of the disclosure will be readily appreciated upon review of the detailed description set forth below in conjunction with the appended drawings.
Figure 1 is an elevation view of an article of footwear having a sole component according to one aspect of the present invention.
Fig. 2 is an exploded view of sole components of the article of footwear of fig. 1.
Fig. 3 is a plan view of the bottom of the sole component of the article of footwear of fig. 1.
Fig. 4 is a bottom view of an insert for use in a sole component of an article of footwear.
Figure 5 is a top view of the insert of figure 4 inserted into a first portion to form a sole element.
FIG. 6 is a lateral elevational view of the article of footwear, showing the upper and outsole of the footwear.
Fig. 7 is a plan view of the bottom of the outsole component.
FIG. 8 is a bottom cross-sectional view of the outsole component shown in FIG. 7, depicting the different sub-areas where the foam particles are fused.
FIG. 9 is a transverse cross-sectional view of the outsole component shown in FIG. 8, taken along line A-A, depicting the sub-areas where the different foam particles are fused.
FIG. 10 is a bottom cross-sectional view of the outsole component shown in FIG. 7, depicting the different sub-areas of foam particle fusion.
Fig. 11 shows representative differential scanning calorimetry data for representative disclosed thermoplastic elastomer foam particles.
Fig. 12 shows representative particle size distribution data for representative disclosed thermoplastic elastomer foam particles (sample size 2,000 foam particles) whose roundness (round) or roundness (circulation) distribution data is shown in fig. 12.
Fig. 13 shows representative roundness or roundness distribution data for a representative disclosed thermoplastic elastomer foam particle (sample size 2,000 foam particles), the particle size distribution data for which is shown in fig. 12.
Fig. 14 shows an image of a representative article prepared using the disclosed method.
Fig. 15 shows an image of a representative midsole on a production platform with unfused particles surrounding the midsole.
FIG. 16 illustrates an image of the representative midsole shown in FIG. 15 after cleaning and removing unfused particles.
Fig. 17 shows an image of a representative midsole made using the disclosed method. After fusing the foam particles by immersing the midsole into an aqueous dye solution heated to 60 degrees celsius, the representative midsole was dyed, the aqueous dye solution including one or more of an acid dye and/or a reactive dye in isopropyl alcohol.
Fig. 18 illustrates, at a higher magnification, an image of a section of the representative midsole illustrated in fig. 17.
Fig. 19 shows an image of a representative midsole made using the disclosed method. After fusing the foam particles by immersing the midsole into an aqueous dye solution heated to 60 degrees celsius, the representative midsole was dyed, the aqueous dye solution including one or more of an acid dye and/or a reactive dye in isopropyl alcohol.
Fig. 20 shows an image of a representative midsole made using the disclosed method. Briefly, white foam particles are arranged and then attached to each other by depositing black energy absorbing ink, followed by heating the foam particles to melt the surfaces of the foam particles, thereby fusing them together.
Fig. 21 shows an image of a representative article prepared using the disclosed method similar to that described in fig. 20. The article includes areas that are not subject to deposition of energy absorbing ink (circular white areas evident on the inner surface of the article) and as such, the foam particles are substantially unattached in these areas (see the figure highlighted with dashed lines including two areas of unattached foam article and indicated by appropriate arrows). Other areas of the article are subjected to deposition of energy absorbing ink and then heated. In this way, the foam particles in these regions are attached to each other.
FIG. 22 shows an image of the representative article depicted in FIG. 21. However, the foam particles in the area including the unattached foam particles have been removed, creating void areas (see the figure highlighted with dashed lines where the unattached foam article is removed and the two void areas indicated by appropriate arrows). Other areas of the article are subjected to deposition of energy absorbing ink and then heated. In this way, the foam particles in these regions remain attached to each other.
Fig. 23 shows an image of a representative article prepared using the disclosed method similar to that described in fig. 20. However, for the article shown, a greater concentration of binder material (binder material) is applied to the left side of the box than to the right side, so that the bulk density and stiffness is greater on the left side than on the right side.
Fig. 24 illustrates, at a higher magnification, an image of a section along the left edge of the representative midsole illustrated in fig. 23.
Fig. 25 illustrates, at a higher magnification, an image of a section along the right edge of the representative midsole illustrated in fig. 23. The image shows individual spots formed by droplets of binder material on the foam particles.
Detailed Description
The present disclosure relates to methods for manufacturing articles using foam particles in additive manufacturing processes. Due to the speed, tailorability, and flexibility of these methods, additive manufacturing methods, such as selective laser sintering, are highly desirable for manufacturing many types of articles. In particular, additive manufacturing methods can be used to manufacture articles that can be manufactured by conventional molding, casting, or machining methods at great cost or with great difficulty. In some cases, the desired article may not even be suitable for manufacture by conventional molding, casting, or machining methods.
In general, an additive manufacturing process is understood as a process of joining materials according to 3D model data to manufacture an object, typically in a layer-by-layer manner, as opposed to a subtractive manufacturing methodology. The additive manufacturing method may include a step comprising directing an energy beam in an x-y plane containing the material in a manner that allows for adjusting an amount of energy transferred to each point in the x-y plane. In this way, the material at each point in the x-y plane may undergo varying degrees of heating and melting, allowing an operator to vary the material property differences of the sub-regions of the x-y plane. However, in other aspects, additive manufacturing methods as disclosed herein may include arranging, including but not limited to, laminated (layering) materials, such as foam particles, which may then be joined by depositing a bonding material thereon. The bonding material is then optionally cured to attach the material to another material. In one aspect, curing the bonding material includes applying energy to at least the foam particles coated with the bonding material to cure the bonding material, thereby attaching the coated foam particles to one another. In another aspect, curing the bonding material includes applying energy to the bonding material to soften the thermoplastic material of the coated foam particles coated with the bonding material and resolidifying the softened thermoplastic material to thereby attach the coated foam particles to one another. In yet another aspect, curing the bonding material includes applying energy to at least the foam particles covered with the bonding material to soften the thermoplastic material of the covered foam particles covered with the bonding material and re-curing the softened thermoplastic material to attach the covered foam particles to one another.
It has been found that additive manufacturing methods can be used for foam particles comprising thermoplastic elastomers. The ability to use foam particles in an additive manufacturing process allows for the first time the process to manufacture articles with properties such as bulk density that are not possible with polymer powders. In addition to attaching a plurality of foam particles to one another to form a structure, the disclosed method may also include attaching a plurality of foam particles to a surface of a component, such as a textile element or a solid resin element. The disclosed method allows for the manufacture of articles that combine the useful properties and material properties found in foamed polymeric materials in a process with the flexibility, tailorability and rapid throughput (rapid throughput) of additive manufacturing methods. In particular, it has been found that the disclosed additive manufacturing methods using foam particles can be used to manufacture components used in the manufacture of footwear, such as preforms, midsoles, outsoles, insoles, and heel cushioning pads.
It has also been found that additive manufacturing processes can be used with solid (i.e., unfoamed) resin particles comprising thermoplastic elastomers, such as resin particles having a number average particle size of about 0.04 millimeters to about 10 millimeters, including resin particles that are generally ellipsoidal or spherical in shape. That is, the articles can be made using the disclosed methods with solid resin particles alone or in combination with foam particles. In addition to attaching a plurality of solid resin particles to one another to form a structure, the disclosed method may also include attaching a plurality of resin particles to a surface of a component, such as a textile element or a solid resin element, such as, for example, an injection molded resin element. The energy absorbing bonding material may be applied to the solid resin particles such that the actinic radiation may then be used to raise the temperature of the resin particles above the melting or softening point of the thermoplastic elastomer forming the resin particles. This method may be used to attach resin particles to each other, to foam particles, or to other elements. Raising the temperature of the resin particles above the melting point of the thermoplastic elastomer may allow molten resin particle material to flow over and into the surfaces of the plurality of foam particles to attach the foam particles to one another to form a structure, or to form a region of highly fused resin particles within the structure, such as an outer edge or an inner edge of the structure, or to attach both the resin particles or the foam particles to form a structure and provide a highly fused region within the structure.
Further, it has been found that the disclosed method can reduce article build time while allowing for the manufacture of parts having multiple sub-regions comprising differentially attached foam particles. The plurality of sub-regions may be discrete regions comprising a desired geometric shape and/or shape. Alternatively, the article may comprise a gradient of differentially attached foam particles. It has been found that the disclosed methods can provide articles having regions of highly attached foam particles, such as the outer or inner edges of the article that demarcate sub-regions in which there are completely unattached foam particles.
In a first aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam particles, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing includes attaching at least a portion of the arranged plurality of foam particles within the bonding material target area to one another.
In a second aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material within at least the bonding material target area that coats at least a portion of the defined surfaces of the arranged plurality of foam particles, wherein curing comprises curing the deposited bonding material and bonding the deposited bonding material to the coated at least a portion of the defined surfaces of the arranged plurality of foam particles, thereby attaching at least a portion of the coated at least a portion of the defined surfaces of the arranged plurality of foam particles in the bonding material target area to each other.
In a third aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises: applying energy to the arranged plurality of foam particles in an amount and for a duration sufficient to melt or soften the thermoplastic material of at least a portion of the coated defining surface of the arranged plurality of foam particles; and reducing the temperature of the region of the arranged plurality of foam particles to or below the temperature at which the melted or softened thermoplastic material resolidifies; thereby attaching at least a portion of the coated of the bounding surface of the plurality of foam particles disposed in the bonding material target area to one another.
In a fourth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and wherein the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a fifth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the bonding material target area; and wherein the disposing, the depositing, and the curing are repeated.
In a sixth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material within at least the bonding material target area that coats at least a portion of the defined surface of the arranged plurality of foam particles, wherein curing comprises curing the deposited bonding material and bonding the deposited bonding material to the coated at least a portion of the defined surface of the arranged plurality of foam particles, thereby affixing the coated at least a portion of the defined surface of the arranged plurality of foam particles in the bonding material target area; and wherein the disposing, the depositing, and the curing are repeated.
In a seventh aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the bonding material target area, wherein curing comprises: applying energy to the arranged plurality of foam particles in an amount and for a duration sufficient to soften the thermoplastic material of at least a portion of the coated surface of the arranged plurality of foam particles; and reducing the temperature of the region of the arranged plurality of foam particles to a temperature at or below which the softened thermoplastic material resolidifies; thereby attaching at least a portion of the coated of the bounding surface of the plurality of foam particles disposed in the bonding material target region; and wherein the disposing, the depositing, and the curing are repeated.
In an eighth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles; and wherein the disposing, the depositing, and the curing are repeated.
In a ninth aspect, the present disclosure relates to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing includes attaching at least a portion of the arranged plurality of foam particles within the bonding material target area.
In a tenth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material within at least the bonding material target area that coats at least a portion of the defined surface of the arranged plurality of foam particles, wherein curing comprises curing the deposited bonding material and bonding the deposited bonding material to the coated at least a portion of the defined surface of the arranged plurality of foam particles, thereby attaching the coated at least a portion of the defined surface of the arranged plurality of foam particles in the bonding material target area.
In an eleventh aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises: applying energy to the arranged plurality of foam particles in an amount and for a duration sufficient to soften the thermoplastic material of at least a portion of the coated surface of the arranged plurality of foam particles; and reducing the temperature of the region of the arranged plurality of foam particles to a temperature at or below which the softened thermoplastic material resolidifies; thereby attaching at least a portion of the coated of the bounding surface of the plurality of foam particles disposed in the bonding material target area.
In a twelfth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and wherein the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a thirteenth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the bonding material target area; and wherein the disposing, the depositing, and the curing are repeated.
In a fourteenth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material, within at least the bonding material target area, that coats at least a portion of the defined surface of the arranged plurality of foam particles, wherein curing comprises curing the deposited bonding material and bonding the deposited bonding material to the coated at least a portion of the defined surface of the arranged plurality of foam particles, thereby affixing the coated at least a portion of the defined surface of the arranged plurality of foam particles within the bonding material target area; and wherein the disposing, the depositing, and the curing are repeated.
In a fifteenth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the bonding material target area, wherein curing comprises: applying energy to the arranged plurality of foam particles in an amount and for a duration sufficient to soften the thermoplastic material of at least a portion of the coated surface of the arranged plurality of foam particles; and reducing the temperature of the region of the arranged plurality of foam particles to a temperature at or below which the softened thermoplastic material resolidifies; thereby attaching at least a portion of the coated of the bounding surface of the plurality of foam particles disposed in the bonding material target region; and wherein the disposing, the depositing, and the curing are repeated.
In a sixteenth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles, and wherein the layer has a substantially planar configuration; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles; and wherein the disposing, the depositing, and the curing are repeated.
In a seventeenth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises attaching at least a portion of the arranged plurality of foam particles within the target area.
In an eighteenth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area; wherein the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a nineteenth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area; wherein depositing the binding material comprises depositing the binding material by spraying, misting, or a combination thereof; wherein the bonding material comprises a solvent, wherein at least a portion of the bounding surface of the disposed plurality of foam particles is dissolved by the solvent; and wherein the curing comprises removing the solvent and curing at least a portion of the dissolved bounding surface of the arranged foam particles; thereby attaching at least a portion of the plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a twentieth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area; wherein the depositing comprises depositing a first bonding material and a second bonding material; wherein the first bonding material comprises a solvent; wherein the second bonding material comprises a dissolvable bonding thermoplastic elastomer material; and wherein the curing comprises removing the solvent and curing the dissolvable bonding thermoplastic elastomer material on at least a portion of the defined surface of the arranged foam particles; thereby attaching at least a portion of the plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a twenty-first aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises attaching at least a portion of the arranged plurality of foam particles within the target area.
In a twenty-second aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area; wherein the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a twenty-third aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area; wherein depositing the binding material comprises depositing the binding material by spraying, misting, or a combination thereof; wherein the bonding material comprises a solvent, wherein at least a portion of the bounding surface of the disposed plurality of foam particles is dissolved by the solvent; and wherein the curing comprises removing the solvent and curing at least a portion of the dissolved bounding surface of the arranged foam particles; thereby attaching at least a portion of the plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a twenty-fourth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises affixing at least a portion of the arranged plurality of foam particles within the target area; wherein the depositing comprises depositing a first bonding material and a second bonding material; wherein the first bonding material comprises a solvent; wherein the second bonding material comprises a dissolvable bonding thermoplastic elastomer material; and wherein the curing comprises removing the solvent and curing the dissolvable bonding thermoplastic elastomer material on at least a portion of the defined surface of the arranged foam particles; thereby attaching at least a portion of the plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In a twenty-fifth aspect, the present disclosure is directed to an article comprising: a structure formed from a plurality of fused foam particles; wherein each individual foam particle of the plurality of fused foam particles is formed from a thermoplastic elastomer material and includes one or more fused regions affixing the individual foam particle to one or more adjacent foam particles; wherein one or more adjacent foam particles comprise a thermoplastic elastomer material; wherein the fused region comprises a portion of the thermoplastic elastomer material from an individual foam particle mixed with a portion of the thermoplastic elastomer material from at least one of one or more adjacent foam particles; wherein a structure formed from a plurality of fused foam particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure; and wherein, prior to fusing, at least 20% of the plurality of foam particles are spherical or ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and at least 20% of the spherical or ellipsoidal foam particles in the structure retain a substantially spherical or ellipsoidal shape.
In a twenty-sixth aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of resin particles, wherein the disposed plurality of resin particles comprise a thermoplastic material, and wherein the disposed plurality of resin particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the disposed plurality of resin particles, and wherein the depositing coats at least a portion of a defined surface of the disposed plurality of resin particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of resin particles within at least the bonding material target area, wherein curing includes attaching at least a portion of the arranged plurality of resin particles within the bonding material target area to one another. In one example, the bonding material target region further includes a plurality of foam particles, and curing includes affixing at least a portion of the arranged plurality of resin particles to at least a portion of the plurality of foam particles.
In an alternative aspect, the foam particles are fused to each other by directing an energy beam. Using such a method, it has been found that the disclosed method reduces the build time of the article by at least one third while allowing the manufacture of a part having a plurality of sub-regions comprising differentially fused foam particles. The plurality of sub-regions may be discrete regions comprising a desired geometric shape and/or shape. Alternatively, the article may comprise a gradient of differentially fused foam particles. It has been found that the disclosed methods can provide articles having areas of highly fused foam particles, such as the outer or inner edges of the article that demarcate sub-areas in which the foam particles are not fused at all.
In an alternative first aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and increasing the temperature of the target area of the plurality of foam particles with actinic radiation under conditions effective to fuse the target area of the plurality of foam particles, wherein increasing the temperature is performed for at least one iteration.
In an alternative second aspect, the present disclosure is directed to a method of manufacturing an article, the method comprising: arranging a plurality of foam particles such that the plurality of foam particles includes a first particle having a first surface in contact with a second surface of an adjacent particle, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and heating a target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the first surface of a first particle to the second surface of an adjacent particle, wherein the heating is performed for at least one iteration.
In an alternative third aspect, the present disclosure is directed to a method of manufacturing an article, the method comprising: forming a layer of a plurality of foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average diameter of about 0.04 millimeters to about 10 millimeters; directing an energy beam at a target region of the layer of the plurality of foam particles for a period of time, wherein selected portions of the layer of the plurality of foam particles are heated by the energy beam, thereby melting a portion of one or more surfaces on the plurality of foam particles located therein; and repeating the forming step and the directing energy step to form the article in a layered manner.
In an alternative fourth aspect, the present disclosure is directed to a method of manufacturing an article, the method comprising: forming a layer of a plurality of spherically shaped foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average diameter of about 0.04 millimeters to about 10 millimeters; directing a laser beam at a target area of a layer of the plurality of foam particles for a period of time, wherein selected portions of the layer of the plurality of foam particles are heated by the laser beam, thereby melting a portion of one or more surfaces on the plurality of foam particles located therein; and repeating the forming step and the directing energy step to form the article in a layered manner.
In an alternative fifth aspect, the present disclosure is directed to a method of manufacturing an article, the method comprising: forming a layer of a plurality of spherically shaped foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average diameter of about 0.04 millimeters to about 10 millimeters; directing a laser beam at a target area of a layer of a plurality of foam particles for a period of time, wherein a portion of the layer of the plurality of foam particles is sintered using selective laser sintering; and repeating the forming step and the directing energy step to form the article in a layered manner.
In an alternative sixth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and heating the target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the target area of the plurality of foam particles, wherein the heating is performed for at least one iteration.
In an alternative seventh aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: arranging a plurality of foam particles such that the plurality of foam particles includes a first particle having a first surface in contact with a second surface of an adjacent particle, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and heating a target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the first surface of a first particle to the second surface of an adjacent particle, wherein the heating is performed for at least one iteration.
In an alternative eighth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: forming a layer of a plurality of foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average diameter of about 0.04 millimeters to about 10 millimeters; directing an energy beam at a target area of a layer of the plurality of foam particles for a period of time, wherein selected portions of the layer of the plurality of foam particles are heated by the energy beam, thereby melting a portion of one or more surfaces on the plurality of foam particles located therein; and repeating the forming step and the directing energy step to form the article in a layered manner.
In an alternative aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: forming a layer of a plurality of spherically shaped foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average diameter of about 0.04 millimeters to about 10 millimeters; directing a laser beam at a target area of a layer of the plurality of foam particles for a period of time, wherein selected portions of the layer of the plurality of foam particles are heated by the laser beam, thereby melting a portion of one or more surfaces on the plurality of foam particles located therein; and repeating the forming step and the directing energy step to form the article in a layered manner.
In an alternative tenth aspect, the present disclosure is directed to an article manufactured by a method of forming an article, the method comprising: forming a layer of a plurality of spherically shaped foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average diameter of about 0.04 millimeters to about 10 millimeters; directing a laser beam at a target area of a layer of a plurality of foam particles for a period of time, wherein a portion of the layer of the plurality of foam particles is sintered using selective laser sintering; and repeating the forming step and the directing energy step to form the article in a layered manner.
In an alternative eleventh aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of resin particles, wherein the plurality of resin particles comprise a thermoplastic elastomer, wherein the plurality of resin particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; increasing the temperature of the target area of the plurality of foam particles with actinic radiation under conditions effective to fuse at least a portion of the plurality of resin particles in the target area to one another, wherein increasing the temperature is performed for at least one iteration. In one example, the target region further includes a plurality of foam particles, and the method is effective in fusing at least a portion of the plurality of foam particles in the target region to a portion of the resin particles.
Articles made using the disclosed methods.
In some aspects, the component is a sole component, such as the
The
As can be seen in figure 2, the
In some aspects, the article is an insert. The
The
As best seen in fig. 3, the ground engaging
Figures 4 and 5 show bottom and top views of an
Fig. 6 shows a lateral side view of an article of
Fig. 8 shows a plan view of an
In some aspects, the foam particles within these
In contrast, the
Fig. 9 illustrates a cross-sectional view of the
Fig. 10 shows a plan view of
Although the disclosed methods described herein may be used to manufacture any of a variety of components, including a variety of components for an article of footwear, in particular aspects, the components include a preform, a midsole, an outsole, a sockliner, a heel cushioning pad, an insole, or an insert. Additional articles may include tongue inserts, collar inserts, and combinations thereof. As described above and more fully detailed below, articles manufactured using the disclosed methods described herein may exhibit sub-regions having different properties, such as, but not limited to, bulk density, elasticity, or flexural modulus. A sub-region may be a discrete region having properties that are more or less evenly distributed within the sub-region. In other aspects, articles made by the disclosed methods can be characterized by: the property is distributed along a gradient of an x-axis, a y-axis, and/or a z-axis of the article.
In some aspects, the article may be a pad component in shin guards, shoulder pads, chest protectors, covers, helmets or other headwear, knee protectors and other protective equipment; a component disposed between textile layers in an article of clothing; or may be used in other known cushioning applications for protection or comfort, particularly where the weight of the cushioning is a concern.
In various aspects, the present disclosure relates to articles manufactured by the disclosed methods as described herein. In some aspects, the article is used to manufacture an article of footwear. In further aspects, the article used to manufacture the article of footwear is a midsole, an outsole, a sockliner, or a heel cushioning pad. In some aspects, the article is a cushion component for a sports helmet, backpack, garment, sports uniform cushion, or combat gear (combat gear).
In various aspects, the article is characterized by a plurality of sub-regions, the plurality of sub-regions comprising a first sub-region characterized by a first property and a second sub-region characterized by a second property, wherein the first property is not equal to the second property, and wherein the first property and the second property are flexural modulus, stiffness, bulk density, or elasticity.
In various aspects, the article is characterized by a plurality of cross-sectional sub-regions including a first sub-region characterized by a first flexural modulus and a second sub-region characterized by a second flexural modulus, wherein the first flexural modulus is not equal to the second flexural modulus.
In various aspects, the article is characterized by a plurality of cross-sectional sub-regions, the plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first bulk density and a second sub-region characterized by a second bulk density, wherein the first bulk density is not equal to the second bulk density.
In various aspects, the article is characterized by a plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first stiffness and a second sub-region characterized by a second stiffness, wherein the first stiffness is not equal to the second stiffness.
In various aspects, the article is characterized by a plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first elasticity and a second sub-region characterized by a second elasticity, wherein the first elasticity is not equal to the second elasticity.
A method of manufacturing an article using foam particles.
In various aspects, the present disclosure relates to a method for forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises attaching at least a portion of the arranged plurality of foam particles within the target area. Arranging a plurality of foam particles, depositing a bonding material in a bonding material target area, and curing the deposited bonding material may be performed for one or more iterations.
The methods described herein comprise various disclosed steps, each of which may be repeated, and as used herein, "iteration" is understood to mean a repetition of a step or set of steps. For example, the disclosed method may include steps as described above, such as arranging a plurality of foam particles, depositing a bonding material in a bonding material target area, and curing the deposited bonding material. Thus, it should be understood that the present disclosure includes one or more iterations of each step, independent of the other steps. For example, the arranging step may be repeated one or more iterations, such that each iteration is an arranging step performed. In a similar manner, depositing the bonding material in the bonding material target area may be repeated for one or more iterations, independent of the placement step or iteration of curing the deposited bonding material in the previous examples. Likewise, curing the deposited bonding material may be repeated for one or more iterations, independent of the placement step in the foregoing example or the iteration of depositing the bonding material in the bonding material target area.
In further aspects, an iteration may comprise one or more repetitions of a totality of steps or a set of steps. For example, in the foregoing example, the steps of arranging a plurality of foam particles, depositing a bonding material in a bonding material target area, and curing the deposited bonding material as described above may be performed as a series of steps from arranging to increasing to decreasing temperatures, and the series of steps will comprise a cycle of the method. Thus, a loop comprising a series of steps may be repeated for one or more iterations. The number of iterations can be from 1 to about 500 iterations, from 1 to about 400 iterations, from 1 to about 300 iterations, from 1 to about 250 iterations, from 1 to about 200 iterations, from 1 to about 150 iterations, from 1 to about 100 iterations, from 1 to about 90 iterations, from 1 to about 80 iterations, from 1 to about 70 iterations, from 1 to about 60 iterations, from 1 to about 50 iterations, from 1 to about 40 iterations, from 1 to about 30 iterations, from 1 to about 20 iterations, from 1 to about 10 iterations, from 1 to about 9 iterations, from 1 to about 8 iterations, from 1 to about 7 iterations, from 1 to about 6 iterations, from 1 to about 5 iterations, from 1 to about 4 iterations, from 1 to about 3 iterations, from 1 to about 2 iterations, any sub-range within the foregoing ranges, Or any set of values within the foregoing ranges.
The target area is understood to include any area containing a plurality of foam particles into which the binding material is directed. The target region may include an outer surface of the region or sub-region, and an underlying portion contiguous or in communication with the outer surface of the region or sub-region. In this example, the target region includes not only the outer surface of the plurality of foam particles, but also those portions of the plurality of foam particles that are accessible to the bonding material. For example, the target area may be part of a layer of a plurality of foam particles. In some cases, the binding material may be provided via a nozzle, such as a piezo print head, that is used to spray or coat the binding material onto a subset of the plurality of foam particles in certain portions of the layer of the plurality of foam particles. Alternatively, if the desired target area includes all of the foam particles, the bonding material may be provided to all or substantially all of the plurality of foam particles.
In various aspects, the present disclosure relates to methods that include additive manufacturing methods. In a further aspect, the disclosed method includes heating a target area containing a plurality of foam particles with a directed energy beam under conditions effective for fusing a portion of the plurality of foam particles containing one or more thermoplastic elastomers. The heating of the target area may be performed for one or more iterations. In some aspects, heating the target area with the directed energy beam includes selective laser sintering of the foam particles.
As discussed above, the methods described herein include various disclosed steps, each of which may be repeated, and as used herein, "iteration" is understood to refer to a repetition of a step or set of steps. For example, the disclosed method may include the steps of: disposing a plurality of foam particles formed from a first thermoplastic elastomer material; increasing a temperature of at least a portion of the plurality of foam particles with actinic radiation under conditions effective to melt or soften a portion of the first thermoplastic elastomer material of the plurality of foam particles; and reducing the temperature of the melted or softened portion of the first thermoplastic elastomer material, thereby solidifying the melted or softened portion of the first thermoplastic elastomer material and forming a plurality of fused foam particles. Thus, it should be understood that the present disclosure includes one or more iterations of each step, independent of the other steps. For example, the arranging step may be repeated one or more iterations, such that each iteration is an arranging step performed. In a similar manner, the increasing of the temperature may be repeated one or more iterations independently of the iteration of the arranging step or the decreasing of the temperature step in the previous examples. Likewise, the decreasing temperature step may be repeated one or more iterations independently of the iterations of the arranging step or the increasing temperature step in the foregoing examples.
In further aspects, an iteration may comprise one or more repetitions of a totality of steps or a set of steps. For example, in the foregoing example, the steps of arranging, increasing the temperature, and decreasing the temperature may be performed as a series of steps from arranging to increasing the temperature to decreasing the temperature, and the series of steps will comprise a cycle of the method. Thus, a loop comprising a series of steps may be repeated for one or more iterations.
In various aspects, the present disclosure relates to methods that include additive manufacturing methods. In a further aspect, the disclosed method includes heating a target area containing a plurality of foam particles with a directed energy beam under conditions effective for fusing a portion of the plurality of foam particles containing one or more thermoplastic elastomers. Heating of the target region may be performed in one or more iterations. In some aspects, heating the target area with the directed energy beam includes selective laser sintering of the foam particles.
The methods described herein comprise various disclosed steps, each of which may be repeated, and as used herein, "iteration" is understood to mean a repetition of a step or set of steps. For example, the disclosed method may include the steps of: disposing a plurality of foam particles formed from a first thermoplastic elastomer material; increasing a temperature of at least a portion of the plurality of foam particles with actinic radiation under conditions effective to melt or soften a portion of the first thermoplastic elastomer material of the plurality of foam particles; and reducing the temperature of the melted or softened portion of the first thermoplastic elastomer material, thereby solidifying the melted or softened portion of the first thermoplastic elastomer material and forming a plurality of fused foam particles. Thus, it should be understood that the present disclosure includes one or more iterations of each step, independent of the other steps. For example, the arranging step may be repeated one or more iterations, such that each iteration is an arranging step performed. In a similar manner, the increasing of the temperature may be repeated one or more iterations independently of the iteration of the arranging step or the decreasing of the temperature step in the previous examples. Likewise, the decreasing temperature step may be repeated one or more iterations independently of the iterations of the arranging step or the increasing temperature step in the foregoing examples.
In further aspects, an iteration may comprise one or more repetitions of a totality of steps or a set of steps. For example, in the foregoing example, the steps of arranging, increasing the temperature, and decreasing the temperature may be performed as a series of steps from arranging to increasing the temperature to decreasing the temperature, and the series of steps will comprise a cycle of the method. Thus, a loop comprising a series of steps may be repeated for one or more iterations. The number of iterations can be from 1 to about 500 iterations, from 1 to about 400 iterations, from 1 to about 300 iterations, from 1 to about 250 iterations, from 1 to about 200 iterations, from 1 to about 150 iterations, from 1 to about 100 iterations, from 1 to about 90 iterations, from 1 to about 80 iterations, from 1 to about 70 iterations, from 1 to about 60 iterations, from 1 to about 50 iterations, from 1 to about 40 iterations, from 1 to about 30 iterations, from 1 to about 20 iterations, from 1 to about 10 iterations, from 1 to about 9 iterations, from 1 to about 8 iterations, from 1 to about 7 iterations, from 1 to about 6 iterations, from 1 to about 5 iterations, from 1 to about 4 iterations, from 1 to about 3 iterations, from 1 to about 2 iterations, any sub-range within the foregoing ranges, Or any set of values within the foregoing ranges.
A target area is understood to include any area containing a plurality of foam particles into which actinic radiation is directed. The target region may include an outer surface of the region or sub-region, and an underlying portion contiguous or in communication with the outer surface of the region or sub-region. In this example, the target area includes not only the outer surface of the plurality of foam particles, but also those portions of the plurality of foam particles accessible to actinic radiation used to soften or melt the foam particles. For example, the target area may be part of a layer of a plurality of foam particles. In some cases, the actinic radiation may be provided via a directed energy beam for elevating the temperature of a subset of the plurality of foam particles in certain portions of the layer of the plurality of foam particles. Alternatively, if the desired target area includes all of the foam particles, actinic radiation may be provided to all or substantially all of the plurality of foam particles.
In one aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and heating the target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the target area of the plurality of foam particles, wherein the heating is performed for at least one iteration.
In one aspect, the present disclosure is directed to a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the plurality of foam particles comprise a thermoplastic elastomer, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.1 millimeters to about 10 millimeters; and heating the target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the target area of the plurality of foam particles, wherein the heating is performed for at least one iteration.
In one aspect, the present disclosure is directed to a method of forming an article, the method comprising: arranging a plurality of foam particles such that the plurality of foam particles includes a first particle having a first surface in contact with a second surface of an adjacent particle, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and heating a target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the first surface of a first particle to the second surface of an adjacent particle, wherein the heating is performed for at least one iteration.
In one aspect, the present disclosure is directed to a method of forming an article, the method comprising: arranging a plurality of foam particles such that the plurality of foam particles comprises a first particle having a first surface in contact with a second surface of an adjacent particle, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.1 millimeters to about 10 millimeters; and heating a target area of the plurality of foam particles with a directed energy beam under conditions effective to fuse the first surface of a first particle to the second surface of an adjacent particle, wherein the heating is performed for at least one iteration.
In a further aspect, disposing the plurality of foam particles comprises depositing a layer comprising the plurality of foam particles. In some aspects, the layer is substantially planar. The articles formed by the disclosed methods may be formed from a single layer. Alternatively, the articles formed by the disclosed methods may be formed from at least two layers. In a further aspect, the article consists of 2 to 50 layers; 2 to 40 layers; 2 to 30 layers; 2 to 25 layers; 2 to 20 layers; 2 to 15 layers; 2 to 10 layers; or 2 to 5 layers. In still further aspects, the article is formed from a plurality of layers, layer by layer.
It should be understood that the disposing step and the heating step may be repeated on a given layer in order to achieve desired properties for that layer or for sub-regions within that layer. In one aspect, the iteration of the arrangement includes depositing a layer comprising a plurality of foam particles.
In various aspects, the step of arranging the plurality of foam particles in the disclosed method comprises arranging using a roller mechanism, a wiper mechanism, or a blower mechanism. In a further aspect, disposing the plurality of foam particles comprises disposing using a roller mechanism. The roller mechanism may include a smooth roller surface, or alternatively, a textured roller surface. In one aspect, disposing the plurality of foam particles comprises disposing using a wiper mechanism. It should be understood that disposing the plurality of foam particles may be disposing a layer of the plurality of foam particles.
In various aspects, the directed energy beam is a laser beam. The laser beam may be emitted by a gas dynamic laser, a diode laser or a lead salt laser. In one aspect, the laser beam is emitted by a carbon dioxide laser. In some aspects, the laser beam is in the infrared spectrum. The laser beam may broadly comprise all or most of the infrared spectrum, or alternatively, the laser beam may comprise a sub-region of the infrared spectrum, such as the far infrared spectrum, the near infrared spectrum, the mid infrared spectrum.
In various aspects, the laser beam includes two or more laser beams, wherein each laser beam is directed at the target area. In further aspects, each of the two or more laser beams may include a different portion of the electromagnetic spectrum. For example, the laser beam may include one laser emitting in the near infrared spectrum and a second laser emitting in the far infrared spectrum.
In various aspects, the laser beam emission has a wavelength of about 700 nanometers to about 1 millimeter; about 1 micron to about 20 microns; about 3 microns to about 15 microns; about 3 microns to about 8 microns; about 8 microns to about 15 microns; or a wavelength of about 9 microns to about 11 microns.
In various aspects, the laser beam has a diameter of about 0.1 millimeters to about 0.7 millimeters; about 0.2 mm to about 0.6 mm; about 0.3 mm to about 0.5 mm; or a beam width of about 0.3 mm to about 0.4 mm. In some aspects, the laser beam is defocused.
In various aspects, the laser beam has a scan pattern such that each pass of the laser beam overlaps an adjacent pass of the laser beam by a fractional amount (fractional amount) of about 0.1 to 0.5. In a further aspect, the laser beam has a scan pattern such that each pass of the laser beam overlaps an adjacent pass of the laser beam by a fractional amount of about 0.3.
In various aspects, the directed energy beam has about 25 watts to about 75 watts; about 35 watts to about 55 watts; about 45 watts to about 65 watts; or a power output of about 50 watts to about 60 watts. In a further aspect, the directed energy beam has a power output of about 55 watts.
In various aspects, the processing conditions include a scan rate across the target area of from about 7,500 millimeters per second to about 25,000 millimeters per second; or alternatively directing a directed energy beam at a scan rate across the target area of about 10,000 millimeters per second to about 15,000 millimeters per second. In some aspects, the processing conditions include directing the directed energy beam at a scan rate across the target area of about 12,500 millimeters per second.
Heating of a given target area comprising a plurality of foam particles may be performed for different numbers of iterations, for example 1 iteration to 500 iterations; 1 iteration to 10 iterations; 1 iteration to 8 iterations; 1 iteration to 7 iterations; 2 iterations to 10 iterations; 2 iterations to 8 iterations; or 2 iterations to 7 iterations. In some aspects, heating the target area of the plurality of foam particles is performed for at least 2 iterations. In some aspects, heating the target region is performed 1 iteration, 2 iterations, 3 iterations, 4 iterations, 5 iterations, 6 iterations, or 7 iterations.
In some aspects, heating the target area fuses the first foam particles in the target area to the second foam particles, wherein the first foam particles are fused to a depth of about 10 microns to about 500 microns as measured from a surface of the first foam particles, and wherein the second foam particles are fused to a depth of about 10 microns to about 500 microns as measured from a surface of the second foam particles. In other aspects, heating the target area fuses the first foam particles in the target area to the second foam particles, wherein the first foam particles are fused to a depth of about 25 microns to about 200 microns as measured from a surface of the first foam particles, and wherein the second foam particles are fused to a depth of about 25 microns to about 200 microns as measured from a surface of the second foam particles.
In various aspects, the disclosed methods of forming an article may further comprise providing an additive to the layer. In some aspects, the additive is provided during the formation of the plurality of layers of foam particles. Optionally, in one aspect, the additive is provided after forming the plurality of layers of foam particles and before directing the energy beam. In further aspects, the additive is provided at or about the same time as the energy beam is directed. In still further aspects, the additive is provided after directing the energy beam. It is to be understood that providing the additive may include spraying, subliming, brushing, soaking, or other means suitable for contacting the additive with at least one surface of the article.
In a further aspect, the additive is a polyurea coating or a polyurethane coating. In still further aspects, the polyurea coating or the polyurethane coating is sprayed onto the plurality of foam particles. In yet further aspects, the additives include binders, lubricants, antioxidants, colorants, fillers, laser sensitizers, and any combination thereof. In one aspect, the additive is a binder. In aspects, the adhesive may include a light-curable elastomeric resin, a heat-activated resin, and combinations thereof.
In one aspect, the additive comprises a laser sensitizer, such as an infrared absorber. The infrared absorber may be an infrared dye or an infrared pigment. In some aspects, the infrared pigment is carbon black.
In various aspects, the target area of the plurality of foam particles has a density of about 0.100 grams per cubic centimeter to about 0.700 grams per cubic centimeter, or alternatively about 0.300 grams per cubic centimeter to about 0.500 grams per cubic centimeter after the energy beam is directed at the target area.
The disclosed method of forming an article may further include heating a plurality of target areas on the plurality of particles. In some aspects, the article has a boundary region bounded by a subset of the plurality of target regions. In a further aspect, the article comprises a first cross-sectional area of the article, the first cross-sectional area comprising a subset of the plurality of target areas, and wherein the first cross-sectional area is heated. Optionally, in various aspects, the article comprises a first cross-sectional area of the article comprising a subset of the plurality of target areas, and wherein the first cross-sectional area is not heated. Heating of multiple target regions may be performed by directing a directed energy beam to each target region using a vector scanning method. Alternatively, heating of multiple target areas may be performed by directing a directed energy beam to each target area using a raster scan method. In some aspects, the plurality of target regions includes a first plurality of target regions and a second plurality of target regions.
In some aspects, the method further comprises spraying or coating one or more layers of polyurea, polyurethane, or a combination thereof onto an article manufactured using the disclosed methods described herein. For example, an article, such as an outsole manufactured using the disclosed methods or a shoe comprising the outsole, may be sprayed with one or more layers of polyurea, polyurethane, or a combination thereof. Suitable sprayable polyureas or polyurethanes are commercially available, such as STS 300 polyurethane,
In various aspects, the method may further comprise: disposing a selective laser sintering powder on a surface of the article such that the selective laser sintering powder comprises a second thermoplastic elastomer; and heating a target area of the laser sintering powder with a directed energy beam under conditions effective to fuse the laser sintering powder, wherein heating the target area of the laser sintering powder is performed for at least one iteration.
The selective laser sintering powder may be a conventional selective laser sintering powder comprising a thermoplastic elastomer. The thermoplastic elastomer immediately above, referred to herein as the second thermoplastic elastomer, may independently comprise any thermoplastic elastomer or combination of thermoplastic elastomers as disclosed herein, including but not limited to thermoplastic polyurea elastomers, thermoplastic polyether elastomers, thermoplastic copolyetherester elastomers, thermoplastic polyamide elastomers, thermoplastic polystyrene elastomers, thermoplastic polyolefin elastomers, thermoplastic copolyetheramide elastomers, thermoplastic styrene diene copolymer elastomers, thermoplastic styrene block copolymer elastomers, thermoplastic polyamide elastomers, thermoplastic polyimide elastomers, any copolymer thereof, and any blend thereof. In some aspects, the selective laser sintering powder used may have a particle size of about 0.020 millimeters to about 0.100 millimeters. In a further aspect, the selective laser sintering powder used is a substantially non-foam material.
The placement of the selective laser sintering powder on the surface of the article and the heating of the target area of the laser sintering powder may be repeated a plurality of iterations. In some cases, the iteration of the arrangement includes depositing a layer containing the selective laser sintering powder. Multiple iterations of disposing and heating selective laser sintering powder may be used to form a skin (skin) on an article manufactured using foam particles using the disclosed method. Thus, the thickness of the surface layer may be adjusted by the number of iterations of arranging and heating the selective laser sintering powder placed on the surface of the foam article. The heating may be performed at a temperature that causes the selective laser sintering powder to fuse for a period of time. In some cases, the heating may be performed for a certain period of time at a temperature that causes the selective laser sintering powder to melt, causing the selective laser sintering powder to flow in a molten state. That is, in various aspects, the heating is at a temperature and for a time sufficient to melt the selective laser sintering powder, thereby forming a melted selective laser sintering powder; and a portion of the melted selective laser sintering powder is made flowable. The selective laser sintering powder may be selected based on the viscosity it will have in the molten state. For example, if it is desired that the melted selective laser sintering powder not significantly penetrate into the article (i.e., a foamed article prepared using the disclosed method using foam particles), a more viscous melted selective laser sintering powder may be selected. Alternatively, selective laser sintering powders having low viscosity in the molten state may be desirable when the selective laser sintering powders are able to flow deeper into the foam article.
In some aspects, disposing the selective laser sintering powder is depositing the selective laser sintering powder on a surface of the article. Alternatively, disposing the selective laser sintering powder is spraying a suspension of the selective laser sintering powder in a solvent onto the surface of the article. The solvent may be water or an aqueous solution, or alternatively, an organic solvent.
The disclosed method may also include compression molding. That is, the article manufactured using the disclosed method may be a preform for manufacturing a component of footwear. It is understood in the art that this could be a foamed article which would then be compression molded under heat and pressure in a closed mold. The compression molding process creates an outer skin on the molded article. The outer skin layer may provide a pleasing aesthetic for the component used to make footwear, for example, it may impart a more uniform appearance and a more controlled appearance, as well as modify the properties of the component, such as its compression set. Conventionally, preforms are cut from a foam sheet (foam sheetstock), or are simultaneously injection molded and foamed. Disclosed herein are methods of making a preform using foam particles using the disclosed additive manufacturing methods, and then compression molding the preform using compression molding methods known to those skilled in the art. The disclosed method provides a surprisingly effective method for reducing waste typically associated with manufacturing components used in footwear, such as from unused portions of sheet stock or from injection molded runners (runners). The disclosed method also typically eliminates the need for a cutting tool if the preform is made from sheet stock, or alternatively, eliminates the substantial costs associated with tooling if the preform is an injection molded preform.
In various aspects, the disclosed additive manufacturing methods may also include directly building fused foam grain structures as described herein, and thereby adhering to elements, such as textile elements, film elements, molded resin elements, and the like. Alternatively or additionally, an element such as a textile element, a film element, a molded resin element, or the like may be placed in contact with the fused or unfused granular foam, and then more granules may be fused on top of and/or around the element. The process may be used to create a layered structure comprising one or more layered elements between one or more layers of fused foam particles. Alternatively or additionally, one or more elements may be completely or partially surrounded by fused foam particles. Optionally, the fused foam particles may be adhered to the element. For example, the foam particles may be adhered to the element by a physical bond formed during the fusing process by melting or softening and then resolidifying the foam particles during the fusing process, or by melting or softening a portion of the element (e.g., a thermoplastic material forming the body of the element, or a thermoplastic material forming an outer layer of the element), or by applying an adhesive to at least a portion of the element.
The element to which the fused foam grain structure is built may be a flexible element, such as a textile element or a membrane element. For example, the flexible element may be a component of an article of footwear, such as a strobel or an upper, and the fused foam grain structure constructed on the flexible element may be a cushioning element, such as a midsole component or an ankle bumper or tongue for the article of footwear. Alternatively, the flexible element may be a component of an article of apparel or an article of sports equipment, and the foam particle structure built on the flexible element may be a cushioning element or an impact absorbing element. Fusing foam particles to form a component using an additive manufacturing process allows the fused foam particles of the component to be easily customized based in part on individual measurements, a desired cushioning layer, or an impact absorbing layer, or both.
In a further aspect, the element onto which the fused foam grain structure is built may be an element comprising a membrane element such as, for example, a bladder. The bladder may be a sealed, fluid-filled bladder, or may be a bladder that has not been filled with a fluid and sealed. The membrane portion of the bladder may be a barrier membrane formed from multiple layers of different polymeric materials. For example, the membrane element may be a component of an article of footwear, such as a bladder, and the combination of the fused foam particle structure and the membrane element may be a sole structure for the article of footwear, such as a midsole or a component of a midsole for the article of footwear. Alternatively, the membrane element may be a component of an article of clothing or an article of sports equipment, and the foam grain structure built on the membrane element may be a cushioning element or an impact absorbing element. Fusing foam particles to form a component using the disclosed additive manufacturing process allows the fused foam particles of the component to be easily customized based in part on individual measurements, desired cushioning or impact absorbing layers, or both.
In further aspects, the element onto which the fused foam grain structure is built may be a rigid element, such as a molded resin element, including an injection molded or extruded resin element. For example, the rigid element may be a component of an article of footwear, such as a midsole component (such as a support or plate structure) or a heel counter, and the fused foam particle structure built upon the rigid element may be a cushioning element, such as a midsole component or an ankle cushion for the article of footwear. Alternatively, the rigid element may be a component of an article of apparel or an article of sports equipment, and the foam particle structure built on the flexible element may be a cushioning element or an impact absorbing element. For example, the rigid element may be a component of an article of protective equipment, and the fused foam grain structure may be built directly onto the rigid element to form a cushioning element or an impact absorbing element for the article of protective equipment. Fusing foam particles to form a cushioning portion or an impact absorbing portion of an article using the disclosed manufacturing process allows for the cushioning layer or the impact absorbing layer, or both, to be easily customized based on individual measurements, desired.
In various aspects, the disclosed additive manufacturing methods may further include directly fusing the foam particles prepared as described herein and thereby adhering to, and into, a variety of structures. In one example, the fused foam particles may be fused to form a structure having an inner surface and an outer surface. The fused foam particle structure may be a structure having a plurality of inner surfaces and a plurality of outer surfaces, such as a honeycomb structure. The fused foam particle structure may include hollow regions that are sealed or open. Optionally, the hollow region may be filled with a plurality of unfused foam particles or with one or more rigid elements. The fused foam particle structure may have a cylindrical or polygonal geometry. In one example, the fused foam grain structure may be a sealed structure having an inner surface and an outer surface, and may have a spherical, ellipsoidal, cylindrical, or polygonal geometry. The use of a hollow foam particle structure may allow for a reduction in the density of the overall structure compared to a solid structure having the same geometry. Hollow or sealed foam particle structures may be used to form support elements, such as support columns. In one example, the columns may be designed to buckle in a particular direction or under a particular load based on the degree to which the foam particles are fused in a particular region of the column structure. Multiple hollow or sealed foam particle structures may be combined or fused together to form larger structures, such as midsoles or other cushioning components.
In various aspects, a disclosed additive manufacturing method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam beads, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material over at least a portion of the defined surface of the arranged plurality of foam particles within at least the bonding material target area, wherein curing comprises attaching at least a portion of the arranged plurality of foam particles within the target area.
In some aspects, curing may include: applying energy to the arranged plurality of foam particles in an amount and for a duration sufficient to soften the coated thermoplastic elastomer material of at least a portion of the defined surface of the arranged plurality of foam particles; and reducing the temperature of the region of the arranged plurality of foam particles to a temperature at or below which the softened thermoplastic elastomer material resolidifies; thereby attaching at least a portion of the coated of the bounding surface of the plurality of foam particles disposed in the bonding material target area.
In some aspects, the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and the curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the coated plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In some aspects, depositing the binding material comprises depositing the binding material by spraying, misting, or a combination thereof; such that the bonding material comprises a solvent; at least a portion of the bounding surface of the arranged plurality of foam particles is dissolved by the solvent; and curing comprises removing the solvent and curing at least a portion of the dissolved bounding surface of the arranged foam particles; thereby attaching at least a portion of the plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In some aspects, depositing comprises depositing a first bonding material and a second bonding material; such that the first bonding material comprises a solvent; the second bonding material comprises a dissolvable bonding thermoplastic elastomer material; and curing comprises removing the solvent and curing the dissolvable bonding thermoplastic elastomer material on at least a portion of the defined surface of the arranged foam particles; thereby attaching at least a portion of the plurality of foam particles disposed in the bonding material target area to each other or to the uncoated foam particles.
In some aspects, the disclosed additive manufacturing methods may include applying a droplet pattern of a binding material comprising a solvent to foam particles, such as foamed or unfoamed thermoplastic elastomer particles, wherein the solvent dissolves and softens a portion of an outer layer of the beads, wherein at least some of the beads include an outer layer in direct contact with outer layers of other beads. In some cases, the solvent may be printed onto only a portion of the beads in the layer of beads, or a screen printing method or a masking method may be used.
In some aspects, the bonding material may be dispensed through one or more nozzles, such as piezo nozzles. An apparatus comprising a plurality of nozzles may be configured such that each nozzle may be individually controlled so as to vary the fluid dispensing speed, droplet size, and/or other properties that vary the area of the target area onto which the bonding material is deposited per deposition iteration and/or the amount of bonding material deposited onto the target area per deposition iteration. In further aspects, the bonding material may be deposited via one or more nozzles at a frequency of about 0.1 kilohertz, 0.5 kilohertz, 1 kilohertz, 2 kilohertz, 3 kilohertz, 4 kilohertz, 5 kilohertz, 6 kilohertz, 7 kilohertz, 8 kilohertz, 9 kilohertz, 10 kilohertz, 15 kilohertz, 20 kilohertz, a range encompassed by one of the foregoing values, or a set of values within a range encompassed by one of the foregoing values. In further aspects, the bonding material can be deposited via one or more nozzles such that the droplets dispensed from each nozzle are about 1 micron, 2 microns, 3 microns, 4 microns, 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, 55 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 150 microns, 200 microns in the longest dimension, a range encompassed by one of the aforementioned values, or a set of values within the range encompassed by one of the aforementioned values. In some cases, the droplets dispensed from the one or more nozzles are spherical or ellipsoidal.
Foam particles.
In various aspects, the foam particles used in the disclosed methods can be prepared via a suspension or extrusion process. The term "foamed particles" is used herein to refer to foamed polymer in the form of particles, such that the particles have gas-filled cells, i.e., foamed polymer in the form of particles, within at least a portion of the internal volume of the foamed particles, the gas-filled cells comprising an open cell structure, a closed cell structure, or a combination thereof. In some cases, greater than about 50%, about 60%, about 70%, about 80%, about 90%, or more of the internal volume of the foam particles may be formed by gas-filled pores. It is desirable in some cases that substantially all of the interior volume is formed by the gas-filled pores. The foam particles may optionally have a skin layer covering greater than about 50%, about 60%, about 70%, about 80%, about 90% or more of the outer surface area of the foam particles. In some cases, the optional skin layer may cover substantially all of the outer surface area of the foam particles. The foam particles may have a variety of shapes, or include a mixture of shapes, such as regularly shaped particles, e.g., rod-shaped, spherical-shaped, ellipsoidal-shaped, or ovoid-shaped; or such as irregularly shaped particles. The foamed particles may optionally include a non-foamed skin layer.
In the suspension process, the thermoplastic elastomer in the form of pellets can be heated in a closed reactor to above the softening point of the pellets in the case of water, in the case of a suspending agent and in the case of a blowing agent. The pellets are thus impregnated with the blowing agent. It is then possible to cool the hot suspension, whereupon the particles solidify in the presence of the blowing agent, and to depressurize the reactor. The pellets containing the foaming agent and obtained in this way are foamed via heating to give foam particles. As an alternative, it is possible to depressurize the hot suspension suddenly without cooling (explosive expansion process), whereupon the softened beads containing the foaming agent immediately foam to give foam particles.
In an extrusion process, the thermoplastic elastomer may be mixed in an extruder under melt with a blowing agent introduced into the extruder. The mixture containing the foaming agent can be extruded and pelletized under conditions of pressure and temperature such that the thermoplastic elastomer is not foamed. For example, the method used for this purpose may be underwater pelletization, which is operated with a water pressure of more than 2 bar to provide expandable beads containing a blowing agent, and then the expandable beads are foamed via subsequent heating to give foam particles. Alternatively, the mixture may also be extruded and granulated at atmospheric pressure. In this process, the melt extrudate (meltextrudate) is foamed and the product obtained via granulation comprises foamed particles.
The thermoplastic elastomer may be used in the form of commercially available pellets, powder, granules or in any other form. The use of pellets is advantageous. An example of a suitable form is the form known as mini-pellets (minipellets), the preferred average diameter of which is from 0.2 to 10 mm, in particular from 0.5 to 5 mm. These mostly cylindrical or round mini-beads are produced via: extrusion of the thermoplastic elastomer and, where appropriate, of the other additives discharged from the extruder, and, where appropriate, cooling and granulation. In the case of cylindrical mini-pellets, the length may be 0.2 mm to 10 mm, or alternatively, may be from 0.5 mm to 5 mm. The pellets may also have a lamellar sheet-like shape (lamellar shape). The average diameter of the thermoplastic elastomer containing the foaming agent is preferably from 0.2 mm to 10 mm.
The preferred blowing agents may vary under appropriate circumstances depending on the particular process used. In the case of a suspension process, the blowing agent used may comprise an organic liquid or an inorganic gas, or a mixture thereof. Liquids which may be used include halogenated hydrocarbons, but saturated aliphatic hydrocarbons, in particular those having from 3 to 8 carbon atoms, are preferably given. Suitable inorganic gases are nitrogen, air, ammonia or carbon dioxide.
In various aspects, the blowing agent can be a supercritical fluid. Non-limiting examples of suitable supercritical fluids include carbon dioxide (critical temperature 31.1 degrees celsius, critical pressure 7.38 megapascals), nitrous oxide (critical temperature 36.5 degrees celsius, critical pressure 7.24 megapascals), ethane (critical temperature 32.3 degrees celsius, critical pressure 4.88 megapascals), ethylene (critical temperature 9.3 degrees celsius, critical pressure 5.12 megapascals), nitrogen (critical temperature-147 degrees celsius, critical pressure 3.39 megapascals), and oxygen (critical temperature-118.6 degrees celsius, critical pressure 5.08 megapascals). In a further aspect, the blowing agent is a supercritical fluid selected from supercritical nitrogen, supercritical carbon dioxide, or mixtures thereof.
By mixing the supercritical carbon dioxide fluid with a polar fluid such as methanol, ethanol, propanol or isopropanol, the supercritical carbon dioxide fluid can be made more compatible with polar thermoplastic elastomers, in particular thermoplastic polyurethane, polyurea and polyamide elastomers. The polar fluid used should have a modulus equal to or greater than 9 MPa-1/2Hildebrand solubility parameter of (1). Increasing the weight fraction of the polar fluid increases the amount of carbon dioxide absorption, but the polar fluid is also absorbed, and at some point there is a transition from the maximum absorption of supercritical carbon dioxide to an increased amount of non-blowing agent polar fluid being absorbed by the thermoplastic elastomer article. In certain aspects, from about 0.1 mole percent to about 7 mole percent of the polar fluid is contained in the supercritical fluid, based on the total fluid, when used to inject the polyurethane elastomer, polyurea elastomer, or polyamide elastomer.
Supercritical fluids may be used in combination. In some cases, supercritical nitrogen may be used as a nucleating agent in small weight percentages along with supercritical carbon dioxide or another supercritical fluid that acts as a blowing agent. Nano-sized particles such as nanoclays, carbon black, crystals (crystallines), immiscible polymers, and inorganic crystals such as salts may be included as nucleating agents.
In producing the foam particles via an extrusion process, the blowing agent may comprise a volatile organic compound having a boiling point from-25 degrees celsius to 150 degrees celsius at an atmospheric pressure of about 1013 millibar. In various aspects, the organic compound can have a boiling point from-10 degrees celsius to 125 degrees celsius at an atmospheric pressure of about 1013 millibars. Hydrocarbons, which in some aspects are preferably halogen-free, have good suitability, in particular C4-10Alkanes, such as the isomers of butane, pentane, hexane, heptane and octane, with sec-pentane being particularly preferred. Other suitable blowing agents areLarger compounds, examples are alcohols, ketones, esters, ethers and organic carbonates.
It is also possible to use halogenated hydrocarbons, but the blowing agent is preferably halogen-free. However, very small proportions of halogen-containing blowing agents in the blowing agent mixture are not excluded. It is, of course, also possible to use mixtures of the blowing agents mentioned.
The amount of blowing agent is preferably from 0.1 to 40 parts by weight, in particular from 0.5 to 35 parts by weight, and particularly preferably from 1 to 30 parts by weight, based on 100 parts by weight of the thermoplastic elastomer used.
In the suspension process, the operation is usually carried out batchwise in an impregnator, for example in a stirred tank reactor. The thermoplastic elastomer is fed to the reactor, for example in the form of mini-pellets, as are water or another suspension medium, and the blowing agent and, where appropriate, the suspending agent. Water-insoluble inorganic stabilizers are suitable as suspending agents, examples being tricalcium phosphate, magnesium pyrophosphate and metal carbonates; and also polyvinyl alcohol and surfactants such as sodium dodecylarylsulfonate. The amounts usually used of these substances are from 0.05 to 10% by weight, based on the thermoplastic elastomer.
The reactor is then sealed and the reactor contents are heated to an impregnation temperature, typically at least 100 degrees celsius. The blowing agent may be added before, during or after heating the reactor contents. The impregnation temperature should be close to the softening point of the thermoplastic elastomer. For example, an immersion temperature of from about 100 degrees Celsius to about 150 degrees Celsius, or alternatively from about 110 degrees Celsius to about 145 degrees Celsius, may be used.
The pressure (i.e. the impregnation pressure) becomes established in the sealed reactor and is generally from 2 bar to 100 bar (absolute) as a function of the quantity and nature of the blowing agent and also of the temperature. The pressure can be adjusted, if desired, via a pressure control valve or under pressure via the introduction of additional blowing agent. At the elevated temperature and superatmospheric pressure provided by the impregnation conditions, the blowing agent diffuses into the polymer pellets. The impregnation time may be generally from 0.5 to 10 hours.
In one aspect of the suspension process, the heated suspension is cooled to generally below a suitable temperature, for example about 100 degrees celsius, occurring after the impregnation process, with the result of re-solidification of the thermoplastic and inclusion of the blowing agent. The material was then depressurized. The product is a foam particle that is eventually separated from the suspension conventionally. The adhering water is typically removed via drying, for example in a pneumatic dryer. Subsequently or previously, if desired, the adherent suspending agent may be removed by treating the beads with a suitable reagent. By way of example, treatment with an acid such as nitric, hydrochloric or sulfuric acid may be used in order to remove acid-soluble suspending agents, for example metal carbonates or tricalcium phosphate.
In an extrusion process, it may be desirable for the thermoplastic elastomer, the blowing agent and, where appropriate, the additives to be introduced together (in the form of a mixture) or separately from one another at one or more locations of the extruder. It is possible, but not required, here to prepare the mixture beforehand from solid components. By way of example, it is possible to start with mixing the thermoplastic elastomer and, where appropriate, the additives, and to introduce the mixture into an extruder, and then to introduce the blowing agent into the extruder, so that the extruder mixes the blowing agent into the polymer melt. It is also possible to introduce a mixture of blowing agent and additive into the extruder, i.e. to premix the additive with the blowing agent.
In the extruder, the mentioned starting materials are mixed while melting the thermoplastic elastomer. Any conventional screw-based machine may be used as extruder, in particular single-screw and twin-screw extruders (e.g. Werner & Pfleiderer ZSK machines), co-kneaders, Kombiplast machines, MPC kneading mixers, FCM mixers, KEX kneading screw extruders and shear roll extruders as known to the person skilled in the art. The extruder may be operated at a temperature at which the thermoplastic elastomer is present in the form of a melt, for example from about 150 degrees celsius to about 250 degrees celsius or from about 180 degrees celsius to about 210 degrees celsius. However, the desired temperature will depend on the melting temperature characteristics of a given thermoplastic elastomer.
The rotation, length, diameter and design of the extruder screw, the amount introduced and the extruder throughput rate are selected in a known manner in such a way as to give a uniform distribution of the additives in the extruded thermoplastic elastomer.
In one aspect of the extrusion process, foam particles are produced. To prevent premature foaming of the melt containing the foaming agent upon discharge from the extruder, the melt extrudate can be discharged from the extruder and pelletized under conditions of temperature and pressure such that substantially no foaming occurs. These conditions may vary as a function of the type and amount of polymer, additives, and in particular blowing agent. The ideal conditions can be easily determined via preliminary experiments.
In a further aspect, an attractive method of preparing the foam particles used in the disclosed methods described herein is underwater pelletization in a water bath, the temperature of which is below 100 degrees celsius and the water bath is subjected to a pressure (absolute) of at least 2 bar. Too low a temperature should be avoided because otherwise the melt hardens on the die plate (die plate), and too high a temperature should also be avoided because otherwise the melt expands. As the boiling point of the blowing agent increases and the amount of the blowing agent becomes smaller, the allowable water temperature becomes higher and the allowable water pressure becomes lower. In the case of the particularly preferred blowing agent, sec-pentane, the desired bath temperature is from about 30 to about 60 degrees celsius and the desired water pressure is from 8 to 12 bar (absolute). It is also possible to use other suitable coolants instead of water. It is also possible to use water-cooled die-face granulation (die-facing). In this process, the cutting chamber is packaged so as to allow the granulation apparatus to operate under pressure. The foam particles can then be separated from the water and, where appropriate, dried.
In various aspects, the foam pellets used in the disclosed methods can be prepared using a continuous process in which a thermoplastic elastomer is melted in a first stage in a twin screw extruder and then the polymer melt is conveyed through one or more static and/or dynamic mixing elements and impregnated with a blowing agent in a second stage. The supported melt impregnated with blowing agent can then be extruded through a suitable die and cut to give foamed particulate material, for example using an underwater pelletizing system (UWPS). UWPS can also be used to cut the melt directly out of the mould to give a foamed particulate material or to give a foamed particulate material with a controlled degree of initial foaming. Thus, by setting a suitable counter pressure and a suitable temperature in the water bath of the UWPS, a controlled production of the foam bead material is possible.
Underwater pelletization is typically carried out at pressures ranging from 1.5 bar to 10 bar to produce expandable polymeric bead materials. The template typically has a plurality of cavity systems with a plurality of holes. Hole diameters in the range from 0.2 mm to 1 mm give expandable polymeric bead materials with preferred average bead diameters in the range from 0.5 mm to 1.5 mm. Expandable polymeric bead materials with narrow particle size distribution and with average particle diameter in the range from 0.6 mm to 0.8 mm lead to better filling of automatic molding systems, wherein the design of the molded parts has a relatively fine structure. This also gives a better surface on the moulded article, with a void of smaller volume.
In various aspects, the foam particles used in the disclosed methods can have a wide range of shapes, including generally spherical, cylindrical, ellipsoidal, cubical, rectangular, and other generally polygonal shapes as well as irregular or other shapes, including shapes having a circular, ellipsoidal, square, rectangular, or other polygonal cross-sectional peripheral shape or an irregular cross-sectional shape with or without a uniform width or diameter along an axis. As used herein, "substantial" as used to describe a shape is intended to indicate an overall shape that may have defects and irregularities such as bumps, depressions, incompletely aligned edges, corners or sides, and the like.
In various aspects, the foam particles used in the disclosed methods can be generally spherical or ellipsoidal. In a further aspect, the foam particles used in the disclosed methods are ellipsoidal or substantially ellipsoidal in shape. In still further aspects, the foam particles used in the disclosed methods are spherical-shaped or substantially spherical-shaped.
In various aspects, the foam particles are irregularly shaped. Optionally, in aspects, the foam particles are regularly shaped or are polygonal in shape. In the case of non-spherical particles, such as ellipsoidal particles, the aspect ratio is the ratio of the largest major diameter of the cross-section perpendicular to the major (longest) axis of the ellipsoid. In further aspects, the foam particles used in the disclosed methods can have a particle size of about 0.1 to about 1.0; about 0.60 to about 0.99; about 0.89 to about 0.99; or an aspect ratio of about 0.92 to about 0.99.
In various aspects, the foam particles used in the disclosed methods can have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters. In further aspects, the foam particles used in the disclosed methods can have a longest dimension of about 0.04 millimeters to about 7 millimeters; about 0.04 mm to about 5 mm in the longest dimension; about 0.04 mm to about 4 mm in the longest dimension; about 0.04 mm to about 3 mm in the longest dimension; about 0.04 mm to about 2 mm in the longest dimension; about 0.04 mm to about 1.5 mm in the longest dimension; about 0.04 mm to about 1 mm in the longest dimension; about 0.04 mm to about 0.9 mm in the longest dimension; about 0.04 mm to about 0.8 mm in the longest dimension; about 0.04 mm to about 0.7 mm in the longest dimension; about 0.04 mm to about 0.6 mm in the longest dimension; about 0.04 mm to about 0.5 mm in the longest dimension; about 0.04 mm to about 0.4 mm in the longest dimension; about 0.04 mm to about 0.3 mm in the longest dimension; about 0.04 mm to about 0.2 mm in the longest dimension; or a number average particle size of about 0.04 millimeters to about 0.1 millimeters in the longest dimension. In still further aspects, the foam particles used in the disclosed methods can have a particle size of about 0.04 millimeters; about 0.05 mm; about 0.06 mm; about 0.07 mm; about 0.08 mm; about 0.09 mm; about 0.10 mm; about 0.15 mm; about 0.20 mm; about 0.25 mm; about 0.30 mm; about 0.35 mm; about 0.40 mm; about 0.45 mm; about 0.50 mm; about 0.55 mm; about 0.60 mm; about 0.65 mm; about 0.70 mm; about 0.75 mm; about 0.80 mm; about 0.85 mm; about 0.90 mm; about 0.95 mm; about 1.0 mm; about 1.1 mm; about 1.2 millimeters; about 1.3 mm; about 1.4 mm; about 1.5 mm; about 1.6 mm; about 1.7 mm; about 1.8 mm; about 1.9 mm; about 2.0 mm; about 2.1 mm; about 220 mm; about 2.3 mm; about 2.4 mm; about 2.5 mm; about 2.6 mm; about 2.7 mm; about 2.8 mm; about 2.9 mm; about 3.0 mm; about 3.5 mm; about 4.0 mm; about 4.5 mm; about 5.0 mm; about 5.5 mm; about 6.0 mm; about 6.5 mm; about 7.0 mm; about 7.5 mm; about 8.0 mm; about 8.5 mm; about 9.0 mm; about 9.5 mm; about 10 mm; or any range or any combination of the foregoing values.
In various aspects, the foam particles used in the disclosed methods can have a number average particle size of about 0.1 millimeters to about 10 millimeters in the longest dimension. In further aspects, the foam particles used in the disclosed methods can have a longest dimension of about 0.3 millimeters to about 7 millimeters; about 0.5 mm to about 5 mm in the longest dimension; about 1 mm to about 5 mm in the longest dimension; about 1 mm to about 4 mm in the longest dimension; about 1 mm to about 3 mm in the longest dimension; about 1 mm to about 2 mm in the longest dimension; about 1.5 millimeters to about 5 millimeters in the longest dimension; about 1.5 millimeters to about 4 millimeters in the longest dimension; about 1.5 mm to about 3 mm in the longest dimension; or a number average particle size of about 1.5 millimeters to about 2.5 millimeters in the longest dimension. In still further aspects, the foam particles used in the disclosed methods can have a particle size of about 0.10 millimeters; about 0.15 mm; about 0.20 mm; about 0.25 mm; about 0.30 mm; about 0.35 mm; about 0.40 mm; about 0.45 mm; about 0.50 mm; about 0.55 mm; about 0.60 mm; about 0.65 mm; about 0.70 mm; about 0.75 mm; about 0.80 mm; about 0.85 mm; about 0.90 mm; about 0.95 mm; about 1.0 mm; about 1.1 mm; about 1.2 millimeters; about 1.3 mm; about 1.4 mm; about 1.5 mm; about 1.6 mm; about 1.7 mm; about 1.8 mm; about 1.9 mm; about 2.0 mm; about 2.1 mm; about 220 mm; about 2.3 mm; about 2.4 mm; about 2.5 mm; about 2.6 mm; about 2.7 mm; about 2.8 mm; about 2.9 mm; about 3.0 mm; about 3.5 mm; about 4.0 mm; about 4.5 mm; about 5.0 mm; about 5.5 mm; about 6.0 mm; about 6.5 mm; about 7.0 mm; about 7.5 mm; about 8.0 mm; about 8.5 mm; about 9.0 mm; about 9.5 mm; about 10 mm; or any range or any combination of the foregoing values.
In various aspects, the foam particles used in the disclosed methods can have a density of about 0.1 grams per cubic centimeter to about 0.8 grams per cubic centimeter. In further aspects, the foam particles used in the disclosed methods can have a particle size of about 0.30 grams per cubic centimeter to about 0.50 grams per cubic centimeter; or a density of about 0.32 grams per cubic centimeter to about 0.48 grams per cubic centimeter. Alternatively, the foam particles used in the disclosed methods can be characterized by their bulk density. Thus, in various aspects, the foam particles used in the disclosed methods can have a bulk density of about 80 grams per liter to about 200 grams per liter. In further aspects, the foam particles used in the disclosed methods can have from about 90 grams per liter to about 200 grams per liter; about 90 grams per liter to about 190 grams per liter; about 90 grams per liter to about 180 grams per liter; about 90 grams per liter to about 170 grams per liter; about 90 grams per liter to about 160 grams per liter; about 90 grams per liter to about 150 grams per liter; about 90 grams per liter to about 140 grams per liter; about 90 grams per liter to about 130 grams per liter; about 100 grams per liter to about 200 grams per liter; about 100 grams per liter to about 190 grams per liter; about 100 grams per liter to about 180 grams per liter; about 100 grams per liter to about 170 grams per liter; about 100 grams per liter to about 160 grams per liter; about 100 grams per liter to about 150 grams per liter; about 100 grams per liter to about 140 grams per liter; about 100 grams per liter to about 130 grams per liter; about 110 grams per liter to about 200 grams per liter; about 110 grams per liter to about 190 grams per liter; about 110 grams per liter to about 180 grams per liter; about 110 grams per liter to about 170 grams per liter; about 110 grams per liter to about 160 grams per liter; about 110 grams per liter to about 150 grams per liter; about 110 grams per liter to about 140 grams per liter; or a bulk density of from about 110 grams per liter to about 130 grams per liter. In still further aspects, the foam particles used in the disclosed methods can have a particle size of about 80 grams per liter; about 85 grams per liter; about 90 grams per liter; about 95 grams per liter; about 100 grams per liter; about 105 grams per liter; about 110 grams per liter; about 115 grams per liter; about 120 grams per liter; about 125 grams per liter; about 130 grams per liter; about 135 grams per liter; about 140 grams per liter; about 145 grams per liter; about 150 grams per liter; about 155 grams per liter; about 160 grams per liter; about 165 grams per liter; about 170 grams per liter; about 175 grams per liter; about 180 grams per liter; about 185 grams per liter; about 190 grams per liter; about 195 grams per liter; about 200 grams per liter; or any range or combination of the foregoing values.
In various aspects, each individual particle may be, for example, from about 2.5 milligrams to about 50 milligrams by weight.
In various aspects, the expanded particles can have a dense outer skin. As used herein, "dense skin" means that the foam cells in the outer region of the expanded particles are smaller than the foam cells in the inner region. In some aspects, the outer region of the expanded particle is free of pores.
In some aspects, foam particles may also be included to minimize shrinkage of the part or to improve the properties of the material.
In various aspects, the foam particles can also include dyes or pigments disclosed below to provide a desirable appearance.
And (3) bonding the materials.
In various aspects, the disclosed bonding materials can be thermal energy absorbers, such as microwave thermal energy absorbers or infrared thermal energy absorbers; a binder material, such as a binder comprising one or more monomers, one or more polymers, or a combination thereof; one or more solvents capable of softening or partially dissolving a portion of the foam particles or capable of softening or partially dissolving a coating applied to the foam particles; or a combination thereof.
In various aspects, the disclosed bonding materials can include a thermal energy absorber. The bonding material containing the thermal energy absorber may be a liquid or a flowable gel. In some aspects, the thermal energy absorber is present as a dispersion in the bonding material. Alternatively, in some aspects, the thermal energy absorber is present in the bonding material as an emulsion. In various aspects, the bonding material comprising the thermal energy absorber is provided by a print head, such as an inkjet print head. Thus, the bonding material comprising the thermal energy absorber has a viscosity that allows the dispersion to pass through the print head. In other aspects, the thermal energy absorber is present in the bonding material and is provided via spraying using a spray head having one or more orifices of suitable diameter. In such a case, the bonding material comprising the thermal energy absorber has a viscosity that allows application via a spray head. In some aspects, the thermal energy absorber comprises graphite, carbon fibers, carbon nanotubes, carbon black, or a combination thereof. In a further aspect, the carbon black is in the form of nanoparticles.
In a further aspect, the thermal energy absorber is a microwave energy absorber. The microwave energy absorber may include metals, metal salts, metal oxides, metal nitrides, metal carbides, metal sulfides, hydrated salts, carbon, clays, silicates, ceramics, zeolites, silica, alumina, titania gel, vermicular (vermiculate), attapulgite (attapulgite), molecular sieves, or combinations thereof. In a further aspect, the microwave energy absorber present as a metal salt can be CuXnWherein n is an integer from 1 to 6 and X is halogen; ZnX2Or SnX2Wherein X is halogen; or a combination thereof. In still further aspects, the microwave energy absorber present as a hydrated salt may be NiCl2·6H2O、Al2(SO4)3·18H2O or a combination thereof. In still further aspects, the microwave energy absorber present as a metal oxide can be CuO, NiO, Fe3O4、Co2O3、BaTiO3Or combinations thereof. In even further aspects, the microwave energy absorber present as a metal sulfide can be Ag2S、CuS、MoS3、PbS、ZnS、FeS、FeS2Or a combination thereof. In various further aspects, the microwave energy absorber present as metal carbide may be SiC, W2C、B4C or a combination thereof. A variety of different metal nitrides are suitable for use as microwave energy absorbers, including but not limited to TiN. In further aspects, the microwave energy absorber present as carbon is graphite, carbon fiber, carbon nanoRice straw, carbon black, or combinations thereof. The carbon black may be in any suitable form for use as a microwave energy absorber, such as nanoparticles or microparticles. A variety of different clays are suitable for use as the microwave energy absorber, including but not limited to sepiolite clay. In some aspects, the microwave energy absorber may also include water. In various aspects, the microwave energy absorber has an average particle size of from about 0.1 nanometers to about 50 microns. In a further aspect, the microwave energy absorber is present in the bonding material from about 0.1 weight percent to about 25 weight percent based on the total weight of the bonding material.
In various aspects, the thermal energy absorber is an infrared energy absorber. There are a variety of suitable infrared energy absorbers that can be used in the disclosed bonding materials. In some aspects, the infrared energy absorber comprises a metal oxide, a metal complex compound, an infrared absorbing dye, or a combination thereof. In further aspects, the infrared energy absorber present as a metal oxide can be tin oxide, zinc oxide, copper oxide; antimony doped tin oxide, indium doped tin oxide, or a combination thereof. In still further aspects, the infrared energy absorber present as the metal complex may be a zinc oxide comprising at least one element selected from the group consisting of In, Ga, Al, and Sb, or a combination thereof. In still further aspects, the infrared energy absorber present as an infrared absorbing dye can be an anthraquinone dye, a cyanine dye, a polymethine dye, an azomethine dye (azomethine dye), an azo dye, a polyazo dye, a diimmonium dye (diimmonium dye), an ammonium dye (aminium dye), a phthalocyanine dye, a naphthalocyanine dye, an indocyanine dye, a naphthoquinone dye, an indoxyl dye, a triallylmethane dye, a metal complex dye, a nickel dithiolate complex dye, an azocobalt complex dye, a squarylium dye (squarylium dye), or a combination thereof. In various aspects, the infrared energy absorber is present in the bonding material from about 0.001 weight percent to about 0.08 weight percent based on the total weight of the bonding material. In a further aspect, the infrared energy absorber is present in the bonding material from about 0.005 weight percent to about 0.06 weight percent based on the total weight of the bonding material.
In various aspects, the disclosed bonding materials can include an adhesive material. The binder material in the bonding material may include one or more monomers, one or more polymers, or a combination thereof. The bonding material comprising the adhesive material may be a liquid or a flowable gel. In some aspects, the binder material is present as a dispersion in the binding material. Alternatively, in some aspects, the binder material is present in the bonding material as an emulsion. In various aspects, the bonding material comprising the adhesive material is provided by a print head, such as an inkjet print head. Thus, the bonding material comprising the binder material has a viscosity that allows the dispersion to pass through the print head. In other aspects, the adhesive material is present in the bonding material and is provided via a spray using a spray head having one or more orifices of suitable diameter. In such a case, the bonding material comprising the adhesive material has a viscosity that allows application via a spray head.
In various aspects, the binding material includes one or more monomers, one or more polymers, or a combination thereof. In further aspects, the one or more monomers comprise one or more epoxy groups, one or more acrylic groups, one or more methacrylic groups, or a combination thereof. In still further aspects, the one or more polymers include a light-cured elastomeric resin, a heat-activated resin, and combinations thereof. In some aspects, the one or more polymers comprise a polyacrylate; a polyepoxide; a copolymer derived from one or more monomers comprising one or more epoxy groups, one or more acrylic groups, one or more methacrylic acids, one or more methacrylic acid groups; or a combination thereof. Useful copolymers are block copolymers comprising at least one polyacrylate block, polymethacrylate block, polymethylmethacrylate block, or a combination thereof. In other aspects, the bonding material further comprises an Ultraviolet (UV) light activated free radical polymerization initiator, a thermal energy activated polymerization initiator, or a combination thereof.
In various aspects, the bonding material includes one or more solvents capable of softening or partially dissolving a portion of the foam particles or capable of softening or partially dissolving a coating applied to the foam particles. One or more solvents capable of softening or partially dissolving a portion of the foam particles or capable of softening or partially dissolving a coating applied to the foam particles are referred to herein as "binding solvents". In some cases, the binding solvent may be applied to the plurality of foam particles, such as in a pattern of binding solvent droplets, such that the solvent dissolves and softens a portion of the outer layer of the foam particles, wherein at least some of the beads include an outer layer in direct contact with the outer layer of other beads. In other aspects, the binding solvent may be applied to a plurality of foam particles comprising a coating, such as a pattern of application binding solvent droplets, such that the solvent dissolves and softens a portion of the coating, wherein at least some of the beads comprise an outer layer on the outer layer in direct contact with the coating on the outer layer of other beads.
In further aspects, the binding material can have a viscosity suitable for the application in which the binding material is deposited in the binding target area. For example, the viscosity may be between about 1 centipoise and about 50 centipoise, about 1 centipoise and about 40 centipoise, about 1 centipoise and about 30 centipoise, about 1 centipoise and about 20 centipoise, about 1 centipoise and about 10 centipoise, about 1 centipoise and about 5 centipoise, about 5 centipoise and about 50 centipoise, about 5 centipoise and about 40 centipoise, about 5 centipoise and about 30 centipoise, about 5 centipoise and about 20 centipoise, about 5 centipoise and about 10 centipoise, about 10 centipoise and about 50 centipoise, about 20 centipoise and about 50 centipoise, about 30 centipoise and about 50 centipoise, about 40 centipoise and about 50 centipoise, a sub-range that is any of the foregoing ranges, or a set of values within any of the foregoing ranges.
In further aspects, the binding material can have a surface tension suitable for the application in which the binding material is deposited in the binding target area. For example, the surface tension can be in a range of about 1 millinewton per meter to about 50 millinewton per meter, about 1 millinewton per meter to about 40 millinewton per meter, about 1 millinewton per meter to about 30 millinewton per meter, about 1 millinewton per meter to about 20 millinewton per meter, about 1 millinewton per meter to about 10 millinewton per meter, about 5 millinewton per meter to about 50 millinewton per meter, about 5 millinewton per meter to about 40 millinewton per meter, about 5 millinewton per meter to about 30 millinewton per meter, about 5 millinewton per meter to about 20 millinewton per meter, about 5 millinewton per meter to about 10 millinewton per meter, about 10 millinewton per meter to about 50 millinewton per meter, about 10 millinewton per meter to about 40 millinewton per meter, about 10 millinewton per meter to about 30 millinewton per meter, about 10 millinewton per meter to about 10 millinewton per meter, about 10 millinewton to about 20 millinewton per meter to about 50 millinewton per meter, about 50 millinewton per meter to about 50 millinewton per meter, about 10 millinewton per meter to about 30 millinewton per meter, about 10 millinewton per meter to about 20 millinewton per meter, between about 40 millinewtons per meter and about 50 millinewtons per meter, a sub-range of any of the foregoing ranges, or a set of values within any of the foregoing ranges.
In further aspects, the binding material can have a vapor pressure suitable for the application in which the binding material is deposited in the binding target region. For example, the vapor pressure can be less than about 60, about 55, about 50, about 45, about 40, about 35, or about 30 pascals.
In some aspects, the binding material may include additives such as initiators, catalysts, and retarders (delayer) may be added to the particulate material, for example, to enhance the binding reaction. For example, the bonding material may include a monomeric binder system based on urethane, acrylate, methacrylate, styrene, cross-linked or non-cross-linked polymerization triggered by UV light, radiation, heat, reactive activators. For example, the bonding material may include a polyurethane-forming monomer and one or more isocyanates. Such bonding materials may be cured by depositing water or water mist on the bonding material to initiate the reaction.
In some aspects, the bonding material may comprise a multi-component glue system, such as a polyurethane resin or an epoxy resin, that crosslinks through the reaction of the two components. It will be appreciated that the bonding material comprises a multi-component system, such as the glue system mentioned above, each component of the multi-component system may be dispensed via a separate nozzle and mixed during deposition, for example in a spray such that the streams dispensed from each nozzle mix before deposition on the surface of the plurality of foam particles. Alternatively, each component of the multi-component system may be delivered from a separate feed supply (feed supply) and mixed in the mixing chamber immediately prior to dispensing from the nozzle.
In some aspects, the bonding material may include a substance, such as an organic solvent or an aqueous solution, that dissolves all or part of the foam particles and bonds them in this manner.
The binding material may also include mixtures of different solvents and/or monomers, chemicals that cause crosslinking, and/or reaction assisting chemicals such as retarders, catalysts, and fillers as disclosed herein or as known to those skilled in the art. For example, in order to improve the properties for depositing the binding material, the binding material may comprise yet further additives, for example for changing the viscosity. That is, the binding material may include additives to increase or decrease viscosity, surface tension, and/or alter other characteristics of the manner in which the binding material is deposited on the foam particles, such as flowing, spraying, dispensing from a nozzle, or combinations thereof. In this way, the deposition of the bonding material may be improved.
In a further aspect, the bonding of the foam particles may be achieved by a bonding material comprising one or more solvents, a mixed solvent system (system) comprising a mixed solvent system comprising one or more organic solvents, and optionally water or an aqueous solution. Non-limiting examples of solvents include alcohols, ketones, acetates or mixtures thereof. It may also be a mixture of different solvents. The binding function of the solvent is based on foam particles at least partially dissolved in the area where the binding material containing the solvent is deposited. As the solvent escapes, the contact surfaces of the foam particles are bonded and solid regions are established. In some cases, a reduction in material can be seen.
The selection of the one or more solvents included in the bonding material is based at least in part on the foam particle formulation and composition, such as the type and amount of thermoplastic elastomer, additives, and fillers present, as well as performance parameters of the curing step and the attachment step of the disclosed method, such as the desired rate of dissolution of the thermoplastic elastomer in the foam particles, whether all or only certain components of the foam particle formulation and composition should be dissolved, cost, and compatibility with the additive manufacturing equipment used. It will be appreciated that the bonding material composition, e.g., the particular solvent or solvents used and the relative amounts used, may be adjusted to fine tune or tune the bonding material to the solubility index of the foam particle formulation and composition, e.g., the type and relative amounts of thermoplastic elastomer present therein.
That is, different solvents will more effectively dissolve different polymers, and thus, a person using the disclosed methods will evaluate the foam particle formulation and composition, e.g., the type and relative amount of thermoplastic elastomer present therein, and modify or adjust the bonding material composition in a manner that matches the solvent that is effective to dissolve that particular chemical or formulation. For example, a bonding material comprising tetrahydrofuran and dimethylformamide may be used for the foam particles comprising polyester and/or low-melting thermoplastic elastomer; or alternatively, a bonding material comprising hexafluoroisopropanol and formic acid may be used for the foam particles comprising the aliphatic polyether and various copolymers. In the case where the foam particles comprise polyamide (nylon), a bonding material comprising hexafluoroisopropanol may be used. The process of determining the solvent used in the binding material can utilize experimental measurements, various polymer solubility databases, and predictive methods (including software) that utilize Hildebrand solubility parameters and/or Hansen solubility parameters.
In some aspects, the binding material may include a solvent that is water or an aqueous solution. For example, the aqueous solution may include, but is not limited to, acetic acid, formic acid, trifluoroacetic acid, or a combination thereof.
In other aspects, the bonding material may include a solvent as the organic solvent. For example, the organic solvent may include, but is not limited to, tetrahydrofuran, dimethylformamide, hexafluoroisopropanol, dichloromethane, or combinations thereof.
In still further aspects, the bonding material can include a solvent that is a mixed solvent system comprising a combination of at least two solvents. For example, the mixed solvent system may include, but is not limited to, a mixed solvent system comprising a combination of two or more of: acetic acid, formic acid, trifluoroacetic acid, tetrahydrofuran, chlorophenol, dimethylformamide, hexafluoroisopropanol and dichloromethane. In specific non-limiting examples, the mixed solvent system can include formic acid and dichloromethane; formic acid and acetic acid; formic acid and chlorophenol; or formic acid and hexafluoroisopropanol.
In some aspects, the binding material comprising a solvent may also comprise a compound or material that slows the rate of evaporation, thereby reducing distortion. For example, the rate of volatilization of the alcohol can be slowed by adding a moisture-containing material, such as monoethylene glycol, to the binding material. Alternatively, or in addition to the foregoing, the evaporation rate may be controlled by appropriate selection of the temperature used during the curing step.
In further aspects, the solvent or mixture of solvents can be varied to optimize the evaporation rate. For example, higher alcohols (n-butanol, pentanol, hexanol, etc.) with higher boiling points and lower vapor pressures can provide a simple and effective way to reduce the evaporation rate.
The binding material may comprise one or more polymers dissolved or partially dissolved in water, an aqueous solution or an organic solvent. In some aspects, these may be water soluble materials such as starch or protein or salt.
In some aspects, the bonding material is deposited and cured in a manner that provides for relatively weak or temporary attachment of at least a portion of the arranged plurality of foam particles within the target area. For example, the article may be used as a preform, which is subsequently compression molded. Thus, the required level of adhesion between the beads may only need to be sufficient that the preform can be handled, including robotic handling, for transfer to the compression mold. In contrast, if the article and foam beads therein are used without a compression molding step, the attachment of at least a portion of the plurality of foam particles disposed within the target area may need to be relatively strong and/or durable.
In various aspects, the binding material can also include a dye or pigment disclosed below to provide a pleasing appearance.
And (3) an additive.
In various aspects, the disclosed foam particles or bonding materials may also independently comprise additives. The additives can be incorporated directly into, or alternatively applied to, the disclosed foam particles or bonding materials. Additives that may be used in the disclosed foam particles or bonding materials include, but are not limited to, dyes, pigments, colorants, ultraviolet light absorbers, hindered amine light stabilizers, antioxidants, processing aids or agents, plasticizers, lubricants, emulsifiers, pigments, dyes, optical brighteners, rheology additives, catalysts, flow control agents, slip agents (slip agents), crosslinking agents, crosslinking promoters (crosslinking boosters), halogen scavengers, smoke inhibitors, flame retardants (flame proofing agents), antistatic agents, fillers, or mixtures of two or more of the foregoing. When used, the additives can be present in an amount from about 0.01 weight percent to about 10 weight percent, about 0.025 weight percent to about 5 weight percent, or about 0.1 weight percent to 3 weight percent, where weight percent is based on the sum of the material components in the thermoplastic composition, fiber, filament, yarn, or fabric.
The individual components can be mixed together with the other components of the thermoplastic composition in a continuous mixer or batch mixer, for example, in an intermeshing rotor mixer such as a hybrid mixer (intermixer), a twin screw extruder, in a tangential rotor mixer such as a Banbury mixer using a two-roll mill, or some combination of these, to produce a composition comprising the thermoplastic polymer and the additives. The mixer may blend the components together via a single step or multiple steps, and may mix the components via dispersive or distributive mixing to form the resulting thermoplastic composition. This step is commonly referred to as "compounding".
In some aspects, the additive is an antioxidant, such as ascorbic acid, an alkylated monophenol, an alkylthiomethylphenol, a hydroquinone or an alkylated hydroquinone, a tocopherol, a hydroxylated thiodiphenyl ether, an alkylidenebisphenol, a benzyl compound, a hydroxylated malonate, an aromatic hydroxybenzyl compound, a triazine compound, a benzylphosphonate, an acylaminophenol, an ester of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with a monohydric or polyhydric alcohol, an ester of beta- (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid with a monohydric or polyhydric alcohol, an ester of beta- (3, 5-dicyclohexyl-4-hydroxyphenyl) propionic acid with a monohydric or polyhydric alcohol, an ester of 3, 5-di-tert-butyl-4-hydroxyphenyl acetic acid with a monohydric or polyhydric alcohol, an ester of a mixture of two or more of these, an ester of a mixture of two or more of these, and a mixture of two or more, An amide of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid, an aminic antioxidant (aminic antioxidant), or a mixture of two or more of the foregoing.
Exemplary alkylated monophenols include, but are not limited to, 2, 6-di-tert-butyl-4-methylphenol, 2-tert-butyl-4, 6-dimethylphenol, 2, 6-di-tert-butyl-4-ethylphenol, 2, 6-di-tert-butyl-4-n-butylphenol, 2, 6-di-tert-butyl-4-isobutylphenol, 2, 6-dicyclopentyl-4-methylphenol, 2- (. alpha. -ethylcyclohexyl) -4, 6-dimethylphenol, 2, 6-dioctadecyl-4-methylphenol, 2,4, 6-tricyclohexylphenol, 2, 6-di-tert-butyl-4-methoxymethylphenol, nonylphenols which are linear or branched in the side chain such as 2, 6-dinonyl-4-methylphenol, 2, 4-dimethyl-6- (1-methylundec-1-yl) phenol, 2, 4-dimethyl-6- (1-methylheptadec-1-yl) phenol, 2, 4-dimethyl-6- (1-methyltridec-1-yl) phenol, and mixtures of two or more of the foregoing.
Exemplary alkylthiomethylphenols include, but are not limited to, 2, 4-dioctylthiomethyl-6-tert-butylphenol, 2, 4-dioctylthiomethyl-6-methylphenol, 2, 4-dioctylthiomethyl-6-ethylphenol, 2, 6-didodecylthiomethyl-4-nonylphenol, and mixtures of two or more of the foregoing.
Exemplary hydroquinones and alkylated hydroquinones include, but are not limited to, 2, 6-di-tert-butyl-4-methoxyphenol, 2, 5-di-tert-butylhydroquinone, 2, 5-di-tert-amylhydroquinone, 2, 6-diphenyl-4-octadecyloxyphenol, 2, 6-di-tert-butylhydroquinone, 2, 5-di-tert-butyl-4-hydroxyanisole, 3, 5-di-tert-butyl-4-hydroxyphenyl stearate, bis- (3, 5-di-tert-butyl-4-hydroxyphenyl) adipate, and mixtures of two or more of the foregoing.
Exemplary tocopherols include, but are not limited to, alpha-tocopherol, p-tocopherol, 7-tocopherol, 6-tocopherol, and mixtures of two or more of the foregoing.
Exemplary hydroxylated thiodiphenyl ethers include, but are not limited to, 2 '-thiobis (6-tert-butyl-4-methylphenol), 2' -thiobis (4-octylphenol), 4 '-thiobis (6-tert-butyl-3-methylphenol), 4' -thiobis (6-tert-butyl-2-methylphenol), 4 '-thiobis- (3, 6-di-sec-amylphenol), 4' -bis (2, 6-dimethyl-4-hydroxyphenyl) disulfide, and mixtures of two or more of the foregoing.
Exemplary alkylene bisphenols include, but are not limited to, 2' -methylenebis (6-tert-butyl-4-methylphenol), 2' -methylenebis (6-tert-butyl-4-ethylphenol), 2' -methylenebis [ 4-methyl-6- (. alpha. -methylcyclohexyl) phenol ], 2' -methylenebis (4-methyl-6-cyclohexylphenol), 2' -methylenebis (6-nonyl-4-methylphenol), 2' -methylenebis (4, 6-di-tert-butylphenol), 2' -ethylenebis (6-tert-butyl-4-isobutylphenol), 2,2 '-methylenebis [6- (. alpha. -methylbenzyl) -4-nonylphenol ], 2' -methylenebis [6- (. alpha.,. alpha. -dimethylbenzyl) -4-nonylphenol ], 4 '-methylenebis (2, 6-di-tert-butylphenol), 4' -methylenebis (6-tert-butyl-2-methylphenol), 1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 2, 6-bis (3-tert-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol, 1, 3-tris (5-tert-butyl-4-, 1, 1-bis (5-tert-butyl-4-hydroxy-2-methyl-phenyl) -3-n-dodecylmercaptobutane, ethyleneglycol bis [3, 3-bis (3-tert-butyl-4-hydroxyphenyl) butyrate ], bis (3-tert-butyl-4-hydroxy-5-methylphenyl) dicyclopentadiene, bis [2- (3-tert-butyl-2-hydroxy-5-methylbenzyl) -6-tert-butyl-4-methylphenyl ] terephthalate, 1-bis (3, 5-dimethyl-2-hydroxyphenyl) butane, 2-bis (3, 5-di-tert-butyl-4-hydroxyphenyl) propane, 2, 2-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) -4-n-dodecylmercaptobutane, 1,5, 5-tetrakis (5-tert-butyl-4-hydroxy-2-methylphenyl) pentane, and mixtures of two or more of the foregoing.
Exemplary benzyl compounds include, but are not limited to, 3,5,3 ', 5 ' -tetra-tert-butyl-4, 4' -dihydroxydibenzyl ether, octadecyl-4-hydroxy-3, 5-dimethylbenzylmercaptoacetate, tridecyl-4-hydroxy-3, 5-di-tert-butylbenzylmercaptoacetate, tris (3, 5-di-tert-butyl-4-hydroxybenzyl) amine, 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) -2,4, 6-trimethylbenzene, bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, isooctyl 3, 5-di-tert-butyl-4-hydroxybenzyl-mercapto-acetate, bis (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) dithiol terephthalate, 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3, 5-tris (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) isocyanurate, dioctadecyl 3, 5-di-tert-butyl-4-hydroxybenzyl-phosphate and monoethyl 3, 5-di-tert-butyl-4-hydroxybenzyl-phosphate, and mixtures of two or more of the foregoing.
Exemplary hydroxybenzylated malonates include, but are not limited to, dioctadecyl-2, 2-bis (3, 5-di-tert-butyl-2-hydroxybenzyl) malonate, dioctadecyl-2- (3-tert-butyl-4-hydroxy-5-ethylbenzyl) malonate, didodecylmercaptoethyl-2, 2-bis (3, 5-di-tert-butyl-4-hydroxybenzyl) malonate, bis [4- (1,1,3, 3-tetramethylbutyl) phenyl ] -2, 2-bis (3, 5-di-tert-butyl-4-hydroxybenzyl) malonate, and mixtures of two or more of the foregoing.
Exemplary aromatic hydroxybenzyl compounds include, but are not limited to, 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) -2,4, 6-trimethylbenzene, 1, 4-bis (3, 5-di-tert-butyl-4-hydroxybenzyl) -2,3,5, 6-tetramethylbenzene, 2,4, 6-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) phenol, and mixtures of two or more of the foregoing.
Exemplary triazine compounds include, but are not limited to, 2, 4-bis (octylmercapto) -6- (3, 5-di-tert-butyl-4-hydroxyanilino) -1,3, 5-triazine, 2-octylmercapto-4, 6-bis (3, 5-di-tert-butyl-4-hydroxyphenoxy) -1,3, 5-triazine, 2,4, 6-tris (3, 5-di-tert-butyl-4-hydroxyphenoxy) -1,2, 3-triazine, 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3, 5-tris (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) isocyanurate, 2,4, 6-tris (3, 5-di-tert-butyl-4-hydroxyphenylethyl) -1,3, 5-triazine, 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) -hexahydro-1, 3, 5-triazine, 1,3, 5-tris (3, 5-dicyclohexyl-4-hydroxybenzyl) isocyanurate, and mixtures of two or more of the foregoing.
Exemplary benzylphosphonates include, but are not limited to, dimethyl-2, 5-di-tert-butyl-4-hydroxybenzylphosphonate, diethyl-3, 5-di-tert-butyl-4-hydroxybenzylphosphonate, dioctadecyl-5-tert-butyl-4-hydroxy-3-methylbenzylphosphonate, the calcium salt of the monoethyl ester of 3, 5-di-tert-butyl-4-hydroxybenzylphosphonic acid, and mixtures of two or more of the foregoing.
Exemplary acylaminophenols include, but are not limited to, 4-hydroxy-lauric acid anilide, 4-hydroxy-stearic acid anilide, 2, 4-bis-octylmercapto-6- (3, 5-tert-butyl-4-hydroxyanilino) -s-triazine, and octyl-N- (3, 5-di-tert-butyl-4-hydroxyphenyl) carbamate, and mixtures of two or more of the foregoing.
Exemplary esters of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid include, but are not limited to, esters with mono-or polyhydric alcohols, such as methanol, ethanol, N-octanol, isooctanol, octadecanol, 1, 6-hexanediol, 1, 9-nonanediol, ethylene glycol, 1, 2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phosphorus-2, 6, 7-trioxabicyclo [2.2.2] octane, as well as mixtures of esters derived from two or more of the foregoing mono-or polyhydric alcohols.
Exemplary esters of beta- (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid include, but are not limited to, esters with monohydric or polyhydric alcohols, such as methanol, ethanol, N-octanol, isooctanol, octadecanol, 1, 6-hexanediol, 1, 9-nonanediol, ethylene glycol, 1, 2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phosphorus-2, 6, 7-trioxabicyclo [2.2.2] octane, as well as mixtures of esters derived from two or more of the foregoing mono-or polyhydric alcohols.
Exemplary esters of beta- (3, 5-dicyclohexyl-4-hydroxyphenyl) propionic acid include, but are not limited to, esters with monohydric or polyhydric alcohols, such as methanol, ethanol, N-octanol, isooctanol, octadecanol, 1, 6-hexanediol, 1, 9-nonanediol, ethylene glycol, 1, 2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phosphorus-2, 6, 7-trioxabicyclo [2.2.2] octane, as well as mixtures of esters derived from two or more of the foregoing mono-or polyhydric alcohols.
Exemplary esters of 3, 5-di-tert-butyl-4-hydroxyphenyl acetic acid include, but are not limited to, esters with mono-or polyhydric alcohols, such as methanol, ethanol, N-octanol, isooctanol, octadecanol, 1, 6-hexanediol, 1, 9-nonanediol, ethylene glycol, 1, 2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phosphorus-2, 6, 7-trioxabicyclo [2.2.2] octane, as well as mixtures of esters derived from two or more of the foregoing mono-or polyhydric alcohols.
Exemplary amides of β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid include, but are not limited to, N '-bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) hexamethylenediamide, N' -bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) trimethylenediamide, N '-bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) hydrazide, N' -bis [2- (3- [3, 5-di-tert-butyl-4-hydroxyphenyl ] propionyloxy) ethyl ] oxamide, and mixtures of two or more of the foregoing.
Exemplary aminic antioxidants include, but are not limited to, N '-diisopropyl-p-phenylenediamine, N' -di-sec-butyl-p-phenylenediamine, N '-bis (1, 4-dimethylpentyl) -p-phenylenediamine, N' -bis (1-ethyl-3-methylpentyl) -p-phenylenediamine, N '-bis (1-methylheptyl) -p-phenylenediamine, N' -dicyclohexyl-p-phenylenediamine, N '-diphenyl-p-phenylenediamine, N' -bis (2-naphthyl) p-phenylenediamine, N-isopropyl-N '-phenyl-p-phenylenediamine, N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, N '-di-sec-butyl-p-phenylenediamine, N' -di-butyl-p-phenylenediamine, N, N- (1-methylheptyl) -N ' -phenyl-p-phenylenediamine, N-cyclohexyl-N ' -phenyl-p-phenylenediamine, 4- (p-toluenesulfonyl) diphenylamine, N ' -dimethyl-N, N ' -di-sec-butyl-p-phenylenediamine, diphenylamine, N-allyldiphenylamine, 4-isopropoxydiphenylamine, N-phenyl-1-naphthylamine, N- (4-tert-octylphenyl) -1-naphthylamine, N-phenyl-2-naphthylamine, octylated diphenylamine, for example p, p ' -di-tert-octyldiphenylamine, 4-N-butylaminophenol, 4-butyrylaminophenol, 4-nonanoylaminophenol, 4-dodecanoylaminophenol, N-dodecylaminol, N-allyldiphenylamine, N-dodecyldiphenylamine, N-cyclohexyldiphenylamine, N-dodecyldiphenylamine, N-dodecylaminol, N, 4-octadecanoylaminophenol, bis (4-methoxyphenyl) amine, 2, 6-di-tert-butyl-4-dimethylaminomethylphenol, 2, 4' -diaminodiphenylmethane, 4' -diaminodiphenylmethane, N, N, N ', N ' -tetramethyl-4, 4' -diaminodiphenylmethane, 1, 2-bis [ (2-methylphenyl) amino ] ethane, 1, 2-bis (phenylamino) propane, (o-tolyl) biguanide, bis [4- (1 ', 3 ' -dimethylbutyl) phenyl ] amine, tert-octylated N-phenyl-1-naphthylamine, mixtures of monoalkylated and dialkylated tert-butyl/tert-octyldiphenylamines, mixtures of monoalkylated and dialkylated nonyldiphenylamines, A mixture of monoalkylated and dialkylated dodecyldiphenylamines, a mixture of monoalkylated and dialkylated isopropyldiphenylamines/isohexyldiphenylamines, a mixture of monoalkylated and dialkylated tert-butyldiphenylamines, 2, 3-dihydro-3, 3-dimethyl-4H-1, 4-benzothiazine, phenothiazine, a mixture of monoalkylated and dialkylated tert-butylphenothiazines/tert-octylphenothiazines, a mixture of monoalkylated and dialkylated tert-octylphenothiazines, N-allylphenothiazine, N, N, N ', N' -tetraphenyl-1, 4-diaminobut-2-ene, N, N-bis (2,2,6, 6-tetramethyl-piperidin-4-yl-hexamethylenediamine, a mixture of monoalkylated and dialkylated tert-butyldiphenylamines, a mixture of monoalkylated and dialkylated tert-octylphenothiazines, N-allylphenothiazine, N, N, N ', N' -, Bis (2,2,6, 6-tetramethylpiperidin-4-yl) sebacate, 2,6, 6-tetramethylpiperidin-4-one, 2,6, 6-tetramethylpiperidin-4-ol, and mixtures of two or more of the foregoing.
In some aspects, the additive is a UV absorber and/or light stabilizer, including but not limited to 2- (2-hydroxyphenyl) -2H-benzotriazole compounds, 2-hydroxybenzophenone compounds, esters of substituted and unsubstituted benzoic acids, acrylate or malonate compounds, sterically hindered amine stabilizer compounds, oxamide compounds, triaryl o-hydroxyphenyl-s-triazine compounds, or mixtures of two or more of the foregoing.
Exemplary 2- (2-hydroxyphenyl) -2H-benzotriazole compounds include, but are not limited to, 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole, 2- (3, 5-di-tert-butyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (2-hydroxy-5-tert-butylphenyl) -2H-benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) -2H-benzotriazole, 5-chloro-2- (3, 5-di-tert-butyl-2-hydroxyphenyl) -2H-benzotriazole, 5-chloro-2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -2H-benzotriazol-e Azole, 2- (3-sec-butyl-5-tert-butyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazole, 2- (3, 5-di-tert-amyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (3, 5-bis-alpha-cumyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2- (omega) -hydroxy-octa (ethyleneoxy) carbonyl-ethyl) -phenyl) -2H-benzotriazole, 2- (3-dodecyl-2-hydroxy-5-methylphenyl) -2H-benzotriazole H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-octyloxycarbonyl) ethylphenyl) -2H-benzotriazole, dodecylated 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-octyloxycarbonylethyl) phenyl) -5-chloro-2H-benzotriazole, 2- (3-tert-butyl-5- (2- (2-ethylhexyloxy) -carbonylethyl) -2-hydroxyphenyl) -5-chloro-2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-methoxycarbonylethylcarbonyl) ethyl) -2H-benzotriazole ) Phenyl) -5-chloro-2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-methoxycarbonylethyl) phenyl) -2H-benzotriazole, 2- (3-tert-butyl-5- (2- (2-ethylhexyloxy) carbonylethyl) -2-hydroxyphenyl) -2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-isooctyloxycarbonylethyl) phenyl-2H-benzotriazole, 2' -methylene-bis (4-tert-octyl- (6-2H-benzotriazol-2-yl) phenol), 2- (2-hydroxy-3-alpha-cumyl-5-tert-octylphenol) Phenylphenyl) -2H-benzotriazole, 2- (2-hydroxy-3-tert-octyl-5-. alpha. -cumylphenyl) -2H-benzotriazole, 5-fluoro-2- (2-hydroxy-3, 5-di-. alpha. -cumylphenyl) -2H-benzotriazole, 5-chloro-2- (2-hydroxy-3-. alpha. -cumylphenyl) -5-tert-octylphenyl) -2H-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-isooctyloxycarbonylethyl) phenyl) -5-chloro-2H-benzotriazole -2H-benzotriazole, 5-trifluoromethyl-2- (2-hydroxy-3-. alpha. -cumyl-5-tert-octylphenyl) -2H-benzotriazole, 5-trifluoromethyl-2- (2-hydroxy-3, 5-di-tert-octylphenyl) -2H-benzotriazole, methyl 3- (5-trifluoromethyl-2H-benzotriazol-2-yl) -5-tert-butyl-4-hydroxyhydrocinnamate, 5-butylsulfonyl-2- (2-hydroxy-3-. alpha. -cumyl-5-tert-octylphenyl) -2H-benzotriazole -benzotriazole, 5-trifluoromethyl-2- (2-hydroxy-3-. alpha. -cumyl-5-tert-butylphenyl) -2H-benzotriazole, 5-trifluoromethyl-2- (2-hydroxy-3, 5-di-alpha-cumylphenyl) -2H-benzotriazole, 5-butylsulfonyl-2- (2-hydroxy-3, 5-di-tert-butylphenyl) -2H-benzotriazole and 5-phenylsulfonyl-2- (2-hydroxy-3, 5-di-tert-butylphenyl) -2H-benzotriazole, and mixtures of two or more of the foregoing.
Exemplary 2-hydroxybenzophenone compounds include, but are not limited to, 4-hydroxy derivatives, 4-methoxy derivatives, 4-octyloxy derivatives, 4-decyloxy derivatives, 4-dodecyloxy derivatives, 4-benzyloxy derivatives, 4, 2', 4' -trihydroxy derivatives and 2 '-hydroxy-4, 4' -dimethoxy derivatives of 2-hydroxybenzophenone, and mixtures of two or more such derivatives.
Exemplary esters of substituted and unsubstituted benzoic acids include, but are not limited to, 4-tert-butyl-phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis (4-tert-butylbenzoyl) resorcinol, benzoyl resorcinol, 2, 4-di-tert-butylphenyl-3, 5-di-tert-butyl-4-hydroxybenzoate, hexadecyl 3, 5-di-tert-butyl-4-hydroxybenzoate, octadecyl 3, 5-di-tert-butyl-4-hydroxybenzoate, 2-methyl-4, 6-di-tert-butylphenyl-3, 5-di-tert-butyl-4-hydroxybenzoate, and mixtures of two or more of the foregoing.
Exemplary acrylate or malonate compounds include, but are not limited to, ethyl or butyl α -cyano- β, β -diphenylacrylate, methyl α -carbonylmethoxy-cinnamate, methyl α -cyano- β -methyl-p-methoxycinnamate or butyl α -cyano- β -methyl-p-methoxycinnamate, methyl α -carbonylmethoxy-p-methoxycinnamate, N- (β -carbonylmethoxy- β -cyanovinyl) -2-methyl-indoline, dimethyl-p-methoxybenzylidenemalonate, bis (1,2,2,6, 6-pentamethylpiperidin-4-yl) p-methoxybenzylidenemalonate, and mixtures of two or more of the foregoing.
Exemplary sterically hindered amine stabilizer compounds include, but are not limited to, 4-hydroxy-2, 2,6, 6-tetramethylpiperidine, 1-allyl-4-hydroxy-2, 2,6, 6-tetramethylpiperidine, 1-benzyl-4-hydroxy-2, 2,6, 6-tetramethylpiperidine, bis (2,2,6, 6-tetramethyl-4-piperidinyl) sebacate, bis (2,2,6, 6-tetramethyl-4-piperidinyl) succinate, bis (1,2,2,6, 6-pentamethyl-4-piperidinyl) sebacate, bis (1-octyloxy-2, 2,6, 6-tetramethyl-4-piperidinyl) sebacate, bis (1,2,2,6, 6-pentamethyl-4-piperidyl) n-butyl-3, 5-di-tert-butyl-4-hydroxybenzylmalonate, tris (2,2,6, 6-tetramethyl-4-piperidyl) nitrilotriacetate, tetrakis (2,2,6, 6-tetramethyl-4-piperidyl) -1,2,3, 4-butane-tetracarboxylate, 1' - (1, 2-ethanediyl) -bis (3,3,5, 5-tetramethylpiperazinone), 4-benzoyl-2, 2,6, 6-tetramethylpiperidine, 4-stearyloxy-2, 2,6, 6-tetramethylpiperidine, bis (1,2,2,6, 6-pentamethylpiperidyl) -2-n-butyl-2- (2-hydroxy-3, 5-di-tert-butylbenzyl) malonate, 3-N-octyl-7, 7,9, 9-tetramethyl-1, 3, 8-triazaspiro [4.5] decane-2, 4-dione, bis (1-octyloxy-2, 2,6, 6-tetramethylpiperidinyl) sebacate, bis (1-octyloxy-2, 2,6, 6-tetramethylpiperidinyl) succinate, the linear or cyclic condensate of N, N' -bis (2,2,6, 6-tetramethyl-4-piperidinyl) -hexamethylenediamine and 4-morpholinyl-2, 6-dichloro-1, 3, 5-triazine, 8-acetyl-3-dodecyl-7, 7,9, 9-tetramethyl-1, 3, 8-triazaspiro [4.5] decane-2, 4-dione, 3-dodecyl-1- (2,2,6, 6-tetramethyl-4-piperidyl) pyrrolidine-2, 5-dione, 3-dodecyl-1- (1,2,2,6, 6-pentamethyl-4-piperidyl) pyrrolidine-2, 5-dione, N- (2,2,6, 6-tetramethyl-4-piperidyl) -N-dodecylsuccinimide, N- (1,2,2,6, 6-pentamethyl-4-piperidyl) -N-dodecylsuccinimide, 2-undecyl-7, 7,9, 9-tetramethyl-1-oxa-3, 8-diaza-4-oxo-spiro [4,5] decane, 1-bis (1,2,2,6, 6-pentamethyl-4-piperidinyloxycarbonyl) -2- (4-methoxyphenyl) ethylene, N '-bis-formyl-N, N' -bis (2,2,6, 6-tetramethyl-4-piperidinyl) hexamethylenediamine, poly [ methylpropyl-3-oxo-4- (2,2,6, 6-tetramethyl-4-piperidinyl) ] siloxane, 1- (2-hydroxy-2-methylpropoxy) -4-octadecanoyloxy-2, 2,6, 6-tetramethylpiperidine, 1- (2-hydroxy-2-methylpropoxy) -4-hexadecanoyloxy-2, 2,6, 6-tetramethylpiperidine -2,2,6, 6-tetramethylpiperidine, 1- (2-hydroxy-2-methylpropoxy) -4-hydroxy-2, 2,6, 6-tetramethylpiperidine, 1- (2-hydroxy-2-methylpropoxy) -4-oxo-2, 2,6, 6-tetramethylpiperidine, bis (1- (2-hydroxy-2-methylpropoxy) -2,2,6, 6-tetramethylpiperidin-4-yl) sebacate, bis (1- (2-hydroxy-2-methylpropoxy) -2,2,6, 6-tetramethylpiperidin-4-yl) adipate, bis (1- (2-hydroxy-2-methylpropoxy) -2,2,6, 6-tetramethylpiperidin-4-yl) succinate, bis (1- (2-hydroxy-2-methylpropoxy) -2,2,6, 6-tetramethylpiperidin-4-yl) glutarate, and 2, 4-bis { N- [1- (2-hydroxy-2-methylpropoxy) -2,2,6, 6-tetramethylpiperidin-4-yl ] -N-butylamino } -6- (2-hydroxyethyl-amino) -s-triazine, and mixtures of two or more of the foregoing.
Exemplary oxamide compounds include, but are not limited to, 4 '-dioctyloxyoxanilide (4, 4' -dioctyloxyoxanilide), 2 '-diethoxyoxanilide, 2' -dioctyloxy-5,5 '-di-tert-butoxanilide (2, 2' -di-octyloxy-5, 5 '-di-tert-butoxanilide), 2' -didodecyloxy-5, 5 '-di-tert-butoxanilide, 2-ethoxy-2' -ethoxanilide, N '-bis (3-dimethylaminopropyl) oxamide, 2-ethoxy-5-tert-butyl-2' -ethoxanilide and mixtures thereof with 2-ethoxy-2 '-ethyl-5, 4' -di-tert-butoxanilide, Mixtures of o-and p-methoxy disubstituted oxanilides and mixtures of o-and p-ethoxy disubstituted oxanilides, and mixtures of two or more of the foregoing.
Exemplary triaryl-o-hydroxyphenyl-s-triazine compounds include, but are not limited to, 4, 6-bis (2, 4-dimethylphenyl) -2- (2-hydroxy-4-octyloxyphenyl) -s-triazine, 4, 6-bis (2, 4-dimethylphenyl) -2- (2, 4-dihydroxyphenyl) -s-triazine, 2, 4-bis (2, 4-dihydroxyphenyl) -6- (4-chlorophenyl) -s-triazine, 2, 4-bis [ 2-hydroxy-4- (2-hydroxy-ethoxy) phenyl ] -6- (4-chlorophenyl) -s-triazine, 2, 4-bis [ 2-hydroxy-4- (2- Hydroxy-ethoxy) phenyl ] -6- (2, 4-dimethylphenyl) -s-triazine, 2, 4-bis [ 2-hydroxy-4- (2-hydroxyethoxy) phenyl ] -6- (4-bromophenyl) -s-triazine, 2, 4-bis [ 2-hydroxy-4- (2-acetoxyethoxy) phenyl ] -6- (4-chlorophenyl) -s-triazine, 2, 4-bis (2, 4-dihydroxyphenyl) -6- (2, 4-dimethylphenyl) -s-triazine, 2, 4-bis (4-biphenyl) -6- (2-hydroxy-4-octyloxycarbonylethyloxyphenyl) -s-triazine, 2-phenyl-4- [ 2-hydroxy-4- (3-sec-butoxy-2-hydroxypropoxy) phenyl J-642-hydroxy-4- (3-sec-pentoxy-2-hydroxypropoxy) -phenyl ] -s-triazine, 2, 4-bis (2, 4-dimethylphenyl) -6- [ 2-hydroxy-4- (3-benzyloxy-2-hydroxy-propoxy) phenyl ] -s-triazine, 2, 4-bis (2-hydroxy-4-n-butoxyphenyl) -6- (2, 4-di-n-butoxyphenyl) -s-triazine, methylenebis {2, 4-bis (2, 4-dimethylphenyl) -6- [ 2-hydroxy-4- (3-butoxy-2-hydroxypropoxy) -phenyl ] -s-triazine }, 2,4, 6-tris (2-hydroxy-4-isooctyloxycarbonylisopropylidenyloxyphenyl) -s-triazine, 2, 4-bis (2, 4-dimethylphenyl) -6- (2-hydroxy-4-hexyloxy-5-. alpha. -cumylphenyl) -s-triazine, 2- (2,4, 6-trimethylphenyl) -4, 6-bis [ 2-hydroxy-4- (3-butoxy-2-hydroxypropoxy) phenyl ] -s-triazine, 2,4, 6-tris [ 2-hydroxy-4- (3-sec-butoxy-2-hydroxypropoxy) phenyl-s-triazine, 4, 6-bis (2, 4-dimethylphenyl) -2- (2-hydroxy-4- (3- (2-ethylhexyloxy) -2-hydroxypropoxy) -phenyl) -s-triazine, 4, 6-diphenyl-2- (4-hexyloxy-2-hydroxyphenyl) -s-triazine, and mixtures of two or more of the foregoing.
In some aspects, the additive is a peroxide scavenger, such as an ester of β -thiodipropionic acid, e.g., lauryl, stearyl, myristyl, or tridecyl ester; mercaptobenzimidazole; and zinc salt of 2-mercapto-benzimidazole, zinc dibutyldithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis (. beta. -dodecylmercapto) propionate, or a mixture of any of the foregoing.
In some aspects, the additive is a polyamide stabilizer, such as a copper salt of a halogen, e.g., iodine, and/or a phosphorus compound and a salt of divalent manganese.
In some aspects, the additive is a basic co-stabilizer such as melamine, polyvinylpyrrolidone, dicyandiamide (dicyandiamide), triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids, for example calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate and potassium palmitate, antimony pyrocatecholate (antimony pyrocatecholate) or zinc pyrocatecholate.
In some aspects, the additive is a nucleating agent, such as talc, a metal oxide, such as titanium dioxide or magnesium oxide, preferably a phosphate, carbonate or sulfate of an alkaline earth metal, or a mixture thereof. Alternatively, the nucleating agent may be a mono-or polycarboxylic acid and salts thereof, such as 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate, sodium benzoate, or mixtures thereof. In a further aspect, the additive may be a nucleating agent comprising both an inorganic material and an organic material as disclosed above.
In some aspects, the rheology modifier can be nanoparticles, nanoclays, nanocarbons, graphites, nanosilicas, and the like, having a relatively high aspect ratio.
In some aspects, the additive is a filler or reinforcing agent such as clay, kaolin, talc, asbestos, graphite, glass (such as glass fibers, glass particles and glass bubbles (glass bulb), glass spheres or glass spheroids), mica, calcium metasilicate, barium sulfate, zinc sulfide, aluminum hydroxide, silicates, diatomaceous earth, carbonates (such as calcium carbonate, magnesium carbonate, and the like), metals (such as titanium, tungsten, zinc, aluminum, bismuth, nickel, molybdenum, iron, copper, brass, boron, bronze, cobalt, beryllium, and alloys of these), metal oxides (such as zinc oxide, iron oxide, aluminum oxide, titanium oxide, magnesium oxide, zirconium oxide, and the like), metal hydroxides, particulate synthetic plastics (such as high molecular weight polyethylene, polypropylene, polystyrene, polyethylene ionomer resins, polyamides, polyesters, polyurethanes, polyimides, and the like), synthetic fibers (such as fibers comprising high molecular weight polyethylene, magnesium oxide, and the like), Fibers of polypropylene, polystyrene, polyethylene ionomer resins, polyamides, polyesters, polyurethanes, polyimides, and the like), particulate carbonaceous materials (such as carbon black and the like), wood flour and other natural product flours or fibers, as well as cotton linters, cellulose pulp, leather fibers, and combinations of any of the foregoing. Non-limiting examples of heavy filler components that may be used to increase the specific gravity of the cured elastomer composition may include titanium, tungsten, aluminum, bismuth, nickel, molybdenum, iron, steel, lead, copper, brass, boron carbide whiskers, bronze, cobalt, beryllium, zinc, tin, metal oxides (such as zinc oxide, iron oxide, aluminum oxide, titanium oxide, magnesium oxide, and zirconium oxide), metal sulfates (such as barium sulfate), metal carbonates (such as calcium carbonate), and combinations of these. Non-limiting examples of lightweight filler components that can be used to reduce the specific gravity of the elastomeric compound can include particulate plastics, hollow glass spheres, ceramics and hollow spheres, regrind, and foams, which can be used in combination.
In some aspects, the additive is a crosslinker. There are a variety of crosslinking agents that can be used in the disclosed thermoplastic compositions. For example, the crosslinking agent may be a free radical initiator. The radical initiator may generate radicals by thermal cleavage or UV radiation. The free radical initiator may be present in an amount from about 0.001 weight percent to about 1.0 weight percent. A variety of free radical initiators may be used as a source of free radicals to produce thermoplastic compositions having a crosslinked structure. Suitable free radical initiators to be applied include peroxides, sulfur and sulfides. Exemplary peroxides include, but are not limited to, aliphatic peroxides and aromatic peroxides such as diacetyl peroxide, di-t-butyl peroxide, dicumyl peroxide, dibenzoyl peroxide, 2, 5-dimethyl-2, 5-di (benzoylperoxy) hexane, 2, 5-dimethyl-2, 5-di (butylperoxy) -3-hexyne, 2, 5-bis (t-butylperoxy) -2, 5-dimethylhexane, n-butyl-4, 4-bis (t-butylperoxy) valerate, 1, 4-bis (t-butylperoxyisopropyl) benzene, t-butylperoxybenzoate, 1-bis (t-butylperoxy) -3,3, 5-trimethylcyclohexane and bis (2, 4-dichlorobenzoyl) or a combination of two or more of the foregoing.
Colorants can include, but are not limited to, dyes, pigments, and the like, and combinations thereof.
In some aspects, the additive is a colorant. The term "colorant" as used herein means a compound that provides color to a substrate, such as the disclosed thermoplastic composition. The colorant may be an organic or inorganic pigment, dye, or mixtures or combinations thereof. In a further aspect, the pigment or dye is an inorganic material, such as a metal oxide, for example iron oxide or titanium dioxide. Alternatively, the inorganic pigment or dye may be a metal compound such as strontium chromate or barium sulfate, or a metal pigment such as aluminum flakes or particles. Other exemplary inorganic pigments include carbon black, talc, and the like. In some cases, the metal compound is not a cadmium-containing metal compound. In some cases it may be desirable that the inorganic pigment or dye is not an inorganic pigment or dye comprising a lead compound, a cadmium compound, and a chromium (VI) compound. In further aspects, the pigment or dye is an organic compound such as perylene, phthalocyanine derivatives (e.g., copper phthalocyanine), indanthrone, benzimidazolone, quinacridone, perinone, and azomethine derivatives. In some cases, the composition is according to any method known to those skilled in the art. For example, the colorant may be added to the thermoplastic composition directly or otherwise via a masterbatch in a mixing device such as an extruder. In various aspects, the disclosed thermoplastic compositions can comprise between about 0.005 weight percent and about 5 weight percent relative to the weight of the composition. In further aspects, the disclosed thermoplastic compositions can comprise between about 0.01 weight percent and about 3 weight percent relative to the weight of the composition.
The foam particles and/or the bonding material may comprise one or more colorants. In some aspects, the foam particles may comprise a first colorant and the bonding material may comprise a second colorant. In this case, it is understood that the first colorant may include one or more dyes or pigments. Similarly, it is to be understood that the second colorant may include one or more dyes or pigments.
There are at least two types of metal complex dyes that can be used as colorants. The acid metal complex dyes are soluble in water and therefore in aqueous solvent systems prior to use. Solvent metal complex dyes are insoluble in water and therefore dissolve in a water/organic solvent system prior to use.
The solvent system for the metal complex dye should both dissolve the dye and promote diffusion of the dye molecules into the elastomeric substrate under mild conditions. Thus, it has been found that certain organic solvents not only dissolve dyes that are insoluble in water, such as solvent metal complex dyes, but also facilitate or facilitate diffusion of the dye into the polymer matrix of both the acid metal complex dye and the solvent metal complex dye.
Suitable organic solvents include Ethylene Glycol Phenyl Ether (EGPE) and isopropanol. Relatively small amounts of organic solvents are generally required.
Suitable solvent systems for acidic metal complex dyes comprise, for example, 90 to 100 volume percent water and 0 to 10 volume percent organic solvent. Typical amounts of organic solvent are 0.5 to 7 volume percent or 1 to 5 volume percent.
Suitable solvent systems for solvent metal complex dyes comprise a third component, typically an organic solvent, in addition to water and ethylene glycol phenyl ether to increase the solubility of the dye. For example, the solvent system can comprise 40 to 80 volume percent water and 60 to 20 volume percent organic solvent. Suitable organic solvents include, but are not limited to, alcohols, ethers, esters, and ketones. Suitable Solvent metal complex dyes include Orasol Yellow 2RLN, Orasol Yellow2GLN-M, Pylam Solvent Red, Pylam Brilliant Yellow and resocast Orange M2Y.
Alternatively, a two-phase solvent system may be used, wherein the dye is soluble in an organic solvent but insoluble in water, and the organic solvent is only partially miscible in water or insoluble or practically insoluble in water. Suitable organic solvents that form a two-phase system include organic solvents that are polar and insoluble in water, such as suitable hydrocarbons, alcohols, aldehydes, ketones, ethers, esters, amides, acids, and halogenated compounds. Examples include, but are not limited to, n-butanol, cyclohexanol, butyl acetate, and ethylene glycol phenyl ether.
In a two-phase solvent system, a solution is prepared containing a large amount of water and a small amount of organic solvent. The organic solvent is partially miscible with water or is nearly insoluble in water, such that the water and organic solvent form a two-phase system. The two-phase solvent composition allows for rapid and uniform dyeing of, for example, foam particles.
The dye may first be dissolved in an organic solvent to form a homogeneous solution, and then the solution may be dispersed as droplets in water under agitation or stirring. Alternatively, an organic solvent may be combined with water to form a two-phase solvent. The dye is then added to the two-phase solvent with agitation or stirring to form droplets.
The two-phase solvent composition can comprise 1 to 30 volume percent, e.g., 1 to 25 volume percent, of the organic solvent and 70 to 99 volume percent, e.g., 75 to 99 volume percent, of the water. These two-phase solvent compositions are particularly suitable for solvent dyes having high solubility in organic solvents. In general, dyes suitable for use in this embodiment include dyes that are highly soluble in organic solvents but are practically insoluble in water.
When a suitable substrate is submerged in a two-phase solvent dye system, droplets of organic solvent and dye are preferentially adsorbed onto the surface of the substrate. This produces a thin layer of organic solvent with a high concentration of dye on the surface of the substrate. In addition, the organic solvent causes the substrate to swell, providing an open polymeric structure. The combination of such an open structure in the substrate and a high concentration of dye facilitates rapid diffusion of the dye molecules into the substrate.
Thus, the two-phase solvent composition both dissolves the dye and facilitates diffusion of the dye molecules into the flexible substrate under mild conditions. Two-phase solvent dye systems provide fast dyeing, use less organic solvent, use mild dyeing conditions, and offer the potential for efficient dye recovery/removal from the solvent compared to conventional dyeing systems.
In some aspects, the dye may be a metal complex dye such as, but not limited to, Bezanyl Black, Bezanyl Red, Bezanyl Yellow, Orasol Black, Orasol Blue GN, Orasol Red G, Orasol Yellow2GLN, Isolan Blue, SP-R, Isolan Grey SP-G, Isolan Red SP-G, Isolan Yellow SP-2RL, Pylam Solvent Blue, Pylam Solvent Red, Pylam Solvent Yellow, Resofast Orange, and Resofast Yellow.
In some aspects, the foam particles can be dyed with a nonionic dye or an anionic ("acid") dye by one of the following: (1) prior to injection with the supercritical fluid, (2) during injection with the supercritical fluid, optionally comprising a polar liquid, by dissolving or dispersing a nonionic or anionic dye in the supercritical fluid, (3) during immersion in a heated fluid, wherein the heated fluid comprises the dye, or (4) after foaming.
In some aspects, the colorant can be an acid dye, such as a water-soluble anionic dye. A wide variety of acid dyes are available, ranging from dark shades (dull tone) to bright shades (brilliant shade). Chemically, acid dyes include azo compounds, anthraquinone compounds, and triarylmethane compounds.
"color index" (C.I.), published by Society of Dyers and Colourists (UK) and American Association of Textile Chemists and Colourists (USA), is the most widespread outline of dyes and pigments for large-scale colouring purposes, including 12000 products under the common name 2000C.I. In c.i., each compound is represented by two numbers, referring to the color class and the chemical class. The "common name" refers to the field of application and/or the method of coloring, and the other number is the "construction number". Non-limiting examples of acid dyes include acid yellow 1, 17, 23, 25, 34, 42, 44, 49, 61, 79, 99, 110, 116, 127, 151, 158:1, 159, 166, 169, 194, 199, 204, 220, 232, 241, 246, and 250; acid red 1, 14, 17, 18, 42, 57, 88, 97, 118, 119, 151, 183, 184, 186, 194, 195, 198, 211, 225, 226, 249, 251, 257, 260, 266, 278, 283, 315, 336, 337, 357, 359, 361, 362, 374, 405, 407, 414, 418, 419, and 447; acid violet 3,5, 7, 17, 54, 90 and 92; acid brown 4, 14, 15, 45, 50, 58, 75, 97, 98, 147, 160:1, 161, 165, 191, 235, 239, 248, 282, 283, 289, 298, 322, 343, 349, 354, 355, 357, 365, 384, 392, 402, 414, 420, 422, 425, 432, and 434; acid oranges 3, 7, 10, 19, 33, 56, 60, 61, 67, 74, 80, 86, 94, 139, 142, 144, 154, and 162; acid blue 1, 7,9, 15, 92, 133, 158, 185, 193, 277:1, 314, 324, 335, and 342; acid green 1, 12, 68:1, 73, 80, 104, 114, and 119; acid black 1, 26, 52, 58, 60, 64, 65, 71, 82, 84, 107, 164, 172, 187, 194, 207, 210, 234, 235, and combinations of these. The acid dyes may be used alone or in any combination in the dye solution.
Acid dyes and nonionic disperse dyes are commercially available from a number of sources, including Dystar l.p., Charlotte, North Carolina, under the trademark TELON; huntsman Corporation, Woodlands, Texas under the trademarks ERIONYL and TECCTILON; BASF SE, Ludwigshafen, Germany, under the trade mark BASACID; clariant International Ltd., Muttenz, Switzerland under the trademarks SOLVAPERM, HOSTASOL, POLYSYNTHREN, and SAVINYL; and Bezema AG, Montlingen, Switzerland, under the trade name Bemacid.
Nonionic disperse dyes are also commercially available in many colors and include fluorescent dyes.
In some aspects, the foam particles may be dyed prior to foaming. The acid disperse dye solution or nonionic disperse dye solution in which the pellets or other articles are dyed may include, for example, from about 0.001 grams per liter to about 5.0 grams per liter, preferably from about 0.01 grams per liter to about 2 grams per liter of the acid disperse dye compound or nonionic disperse dye compound or combination of the acid disperse dye compound or nonionic disperse dye compound. The amount of acidic disperse dye compound or nonionic disperse dye compound used will determine how strongly the color is (strong) and how fast the pellets or other objects are dyed, and can be optimized in a straightforward manner; in general, more concentrated dye solutions can provide more intense (darker, more intense) colors and can dye pellets or other articles comprising thermoplastic elastomers more quickly.
The dye solution may include a water-soluble organic solvent. The concentration of alcohol to be used in the dye solution at 20 degrees celsius and 1atm pressure determines the water solubility of the specific organic solvent used in a specific amount in the dye solution; the organic solvent is water soluble if it is completely soluble or completely miscible in water at 20 degrees celsius and 1atm pressure at concentrations at which alcohol is to be used in the dye solution and does not form any separate phase or layer. Suitable non-limiting examples of water-soluble organic solvents that can be used include alcohols such as methanol, ethanol, n-propanol, isopropanol, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, and glycerol; ketones such as acetone and methyl ethyl ketone; esters, such as butyl acetate, which are soluble in water in limited amounts; and glycol ethers and glycol ether esters (particularly acetates), such as ethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, and propylene glycol monomethyl ether acetate. The water soluble organic solvent may be included at a concentration of up to about 50% by volume, or up to about 25% by volume, or from about 1% to about 50% by volume, or from about 5% to about 40% by volume, or from about 10% to about 30% by volume, or from about 15% to about 25% by volume of the aqueous medium used to make the dye solution. Whether and how much organic solvent is used can vary depending on which dye is used and the application method used to bring the dye solution into contact with the pellet or other article.
When the foam particles or the binding material comprise a thermoplastic polyurethane elastomer or a thermoplastic polyurea elastomer, the anionic dye solution advantageously also comprises a quaternary (tetraalkyl) ammonium salt selected from soluble tetrabutylammonium compounds and tetrahexylammonium compounds. Such articles are advantageously dyed in an acid dye solution comprising an anionic dye compound, a quaternary ammonium salt selected from soluble tetrabutylammonium compounds and tetrahexylammonium compounds, and optionally a water soluble organic solvent.
The counter ion of the quaternary ammonium salt should be selected such that the quaternary ammonium salt forms a stable solution with the anionic dye. The quaternary ammonium compound may be, for example, a halide (such as chloride, bromide, or iodide), hydroxide, sulfate, sulfite, carbonate, perchlorate, chlorate, bromate, iodate, nitrate, nitrite, phosphate, phosphite, hexafluorophosphite, borate, tetrafluoroborate, cyanide, isocyanide, azide, thiosulfate, thiocyanate, or carboxylate (such as acetate or oxalate). In certain embodiments, the anion of the weaker lewis base may be selected for the tetraalkylammonium compound to produce a darker color for a dyed overlay (cover layer) or coating. In various embodiments, the tetraalkylammonium compound is or includes a tetrabutylammonium halide or a tetrahexylammonium halide, particularly tetrabutylammonium bromide or tetrabutylammonium chloride or tetrahexylammonium bromide or tetrahexylammonium chloride.
When the foam particles or the binding material comprise a thermoplastic polyurethane elastomer or a thermoplastic polyurea elastomer, the acid dye solution used to dye the foam particles or the binding material may comprise from about 0.1 equivalents to about 5 equivalents of the soluble tetraalkylammonium compound per equivalent of dye compound. In various embodiments, the acid dye solution may comprise from about 0.5 equivalents to about 4 equivalents, preferably from about 1 equivalent to about 4 equivalents, of tetraalkylammonium compound per equivalent of dye compound. The amount of tetraalkylammonium compound used with a particular acid dye compound depends on the rate of diffusion of the dye into and in the overlayer or coating and can be optimized in a straightforward manner. The process of dyeing foam particles or binding materials comprising thermoplastic polyurethane elastomers or thermoplastic polyurea elastomers with this dye solution comprising soluble tetraalkylammonium compounds can produce intense color intensities in the dyed foam particles or binding materials.
The foam particles may be dyed with a nonionic dye or an anionic dye by one of the following: (1) prior to injection of the supercritical fluid. The pellets may also be dyed while injected with a supercritical fluid, optionally containing a polar liquid, by a nonionic or anionic dye dissolved or dispersed in the supercritical fluid. The pellets may also be dyed while submerged in a heated fluid, wherein the heated fluid contains a dye. In particular, the heated fluid may be a heated aqueous dye solution, which may comprise a quaternary ammonium salt as described and an organic solvent. Finally, the foam particles may be dyed after foaming using a dyeing process as already described.
An elastomeric thermoplastic polymer.
In various aspects, the foam particles of the present disclosure can be prepared from a suitable thermoplastic elastomer. For example, the thermoplastic elastomer may be selected from the group consisting of thermoplastic polyurethane elastomers, thermoplastic polyurea elastomers, thermoplastic polyether elastomers, thermoplastic copolyetherester elastomers, thermoplastic polyamide elastomers, thermoplastic polystyrene elastomers, thermoplastic polyolefin elastomers, thermoplastic copolyetheramide elastomers, thermoplastic styrene diene copolymer elastomers, thermoplastic styrene block copolymer elastomers, thermoplastic polyamide elastomers, thermoplastic polyimide elastomers, any copolymers thereof and any blends thereof.
In various aspects, the thermoplastic elastomer used to prepare the foam particles comprises a thermoplastic copolyetherester elastomer. It is to be understood that as used herein, "thermoplastic copolyetherester elastomer" may be used interchangeably with "thermoplastic polyether-polyester block copolymer", "thermoplastic polyester/polyether block copolymer", "copolyester elastomer", "poly-ether-ester block copolymer", "block poly-ether-ester", "polyester elastomer", "thermoplastic poly-ether-ester", "co (ether ester)", and "copolyester thermoplastic elastomer". In a further aspect, the thermoplastic copolyetherester elastomer comprises hard (or crystalline) polyester segments dispersed in soft (or amorphous) polyether segments. In a further aspect, the thermoplastic copolyetherester elastomer is a block copolymer. In still further aspects, the thermoplastic copolyetherester elastomer is a segmented block copolymer. In some aspects, the thermoplastic copolyetherester elastomer is a block copolymer comprising segments or blocks of polyester and segments or blocks of polyether.
In various aspects, the thermoplastic copolyetherester elastomer used to prepare the foam particles comprises polyester segments produced by the reaction of a dicarboxylic acid derivative, such as terephthalate, and a glycol, such as butanediol, and polyether segments, such as polyalkylene (ether) glycol or polyalkylene (ether) polyol.
In various aspects, the polyester segment comprises polybutylene terephthalate (PBT). In a further aspect, the polyester segment has a segment molecule of about 3000 daltons to about 9000 daltons. In still further aspects, the polyester segment has a segment molecule of about 5000 daltons to about 7000 daltons.
In various aspects, the polyether segment comprises a long chain polyol. In further aspects, polyethylene glycol (PEG), polypropylene glycol (PPG) or polypropylene ether glycol (PPEG), polytetramethylene glycol (PTMG or PTHF), polytetramethylene ether glycol, and combinations thereof. In a further aspect, the polyether segment has a segment molecule of about 200 daltons to about 4000 daltons. In still further aspects, the polyether segment has a segment molecule of about 1000 daltons to about 3000 daltons.
In various aspects, the thermoplastic copolyetherester elastomer comprises polytetramethylene ether terephthalate soft segments and polybutylene terephthalate hard segments. Thermoplastic copolyetherester elastomers are commercially available, and non-limiting examples are available under the trade names HYTREL (DuPont Company, Wilmington, Delaware), ARNITEL (DSM engineering plastics, Evansville, Indiana), and PELPRENE (Toyobo Co., Ltd., Osaka, Japan).
In various aspects, the thermoplastic copolyetherester elastomeric polymer comprises polyether segments obtained by polymerization of tetrahydrofuran (i.e., poly (tetramethylene ether)) and polyester segments obtained by polymerization of tetramethylene glycol and phthalic acid (i.e., 1, 4-butylene terephthalate). The more polyether units incorporated into the copolyetherester, the softer the polymer. The poly (tetramethylene ether) glycol used to prepare the copolyetheresters can have a molecular weight of from about 500 daltons to about 3500 daltons, or from about 800 daltons to about 2500 daltons.
In various aspects, the thermoplastic copolyetherester elastomeric polymer comprises repeat units derived from 30 to 70
In various aspects, the thermoplastic copolyetherester elastomeric polymer comprises repeat units derived from 30 to 40
In various aspects, the thermoplastic copolyetherester elastomer is a block copolymer of short-chain and long-chain poly (ether glycol terephthalate) s, the block copolymer comprising about 60 weight percent hard segments of polybutylene terephthalate and about 40 weight percent soft segments of polytetramethylene ether terephthalate, the thermoplastic copolyetherester elastomer having a durometer hardness of 55 Shore D (ASTM D-2240), a melting point of 211 ℃ (ASTM D-2117), a Vicat softening point of 180 ℃ (ASTM D1525), and a flexural modulus of 207 megapascals (MPa) (ASTM D790). Suitable materials having the foregoing characteristics are available under the trade name HYTRELO 5556(DuPont Company, Wilmington, Delaware).
In various aspects, the thermoplastic copolyetherester elastomer is a block copolymer of short-chain and long-chain poly (ether terephthalate) s, the block copolymer comprising about 42 weight percent hard segments of polybutylene terephthalate and about 58 weight percent soft segments of polytetramethylene ether terephthalate, the thermoplastic copolyetherester elastomer having a durometer hardness of 92A/40D, a melting point of 168 degrees celsius, a vicat softening point of 112 degrees celsius, and a flexural modulus of 48.3 megapascals. Suitable materials having the foregoing characteristics are available under the trade name HYTREL 4056(DuPont Company, Wilmington, Delaware).
In various aspects, the thermoplastic copolyetherester elastomer is a block copolymer of short-chain and long-chain poly (ether terephthalate) s, the block copolymer comprising about 80 weight percent hard segments of polybutylene terephthalate and about 20 weight percent soft segments of polytetramethylene ether terephthalate, the thermoplastic copolyetherester elastomer having a durometer hardness of about 72D, a melting point of 219 degrees celsius, a vicat softening point of 207 degrees celsius, and a flexural modulus of 585 megapascals. Suitable materials having the foregoing characteristics are available under the trade name HYTRELO 7246(DuPont Company, Wilmington, Delaware).
In various aspects, the thermoplastic copolyetherester elastomer comprises long-chain ester units of formula I:
and short-chain ester units of formula II:
wherein R is1Comprising divalent groups remaining after removal of terminal hydroxyl groups from a poly (alkylene ether) having a carbon to oxygen ratio of from about 2.0 to about 4.3 and a number average molecular weight of from about 400 daltons to about 6000 daltons; wherein R is2Comprising divalent groups remaining after removal of carboxyl groups from dicarboxylic acids having a molecular weight of less than about 300 daltons; wherein R is3Comprising divalent radicals remaining after removal of hydroxyl groups from low molecular weight diols having molecular weights of less than about 250 daltons; wherein R is4Comprising divalent groups remaining after removal of carboxyl groups from dicarboxylic acids having a molecular weight of less than about 300 daltons; wherein the long-chain ester units represented by formula I constitute from about 5 weight percent to about 95 weight percent of the thermoplastic copolyetherester elastomer; and wherein the short-chain ester units represented by formula II constitute from about 95 weight percent to about 5 weight percent of the thermoplastic copolyetherester elastomer.
In a further aspect, R1Including divalent radicals remaining after removal of terminal hydroxyl groups from poly (tetramethylene ether). In still further aspects, R1Has a molecular weight of from about 500 daltons to about 3500 daltons; about 600 daltons to about 3000 daltons; about 800 daltons to about 1200 daltons; about 800 daltons to about 2000 daltons; about 800 daltons to about 2500 daltons; about 800 daltons to about 3000 daltons; about 800 daltons to about 3500 daltons; about 800 daltons to about 4000 daltons; about 1000 daltons to about 3000 daltons; or a number average molecular weight of from about 1500 daltons to about 2500 daltons.
In a further aspect, R2Including divalent radicals remaining after removal of carboxyl groups from aromatic dicarboxylic acids. In still further aspects, R2Including divalent radicals remaining after removal of carboxyl groups from 1, 4-phthalic acid.
In a further aspect, R3Including divalent radicals remaining after removal of hydroxyl groups from C2-C6 alkyl diols. In yet a further aspect of the present invention,R3including divalent radicals remaining after removal of hydroxyl groups from 1, 4-butanediol.
In a further aspect, R4Is a divalent group remaining after removal of a carboxyl group from an aromatic dicarboxylic acid. In still further aspects, R4Is the divalent radical remaining after removal of the carboxyl group from 1, 4-phthalic acid.
In a further aspect, the long-chain ester units represented by formula I constitute from about 10 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer; about 20 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer; about 30 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer; about 10 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer; about 20 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer; about 30 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer; about 10 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer; about 20 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer; or about 30 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
In a further aspect, the short-chain ester units represented by formula II constitute from about 20 weight percent to about 90 weight percent of the thermoplastic copolyetherester elastomer; about 40 weight percent to about 90 weight percent of the thermoplastic copolyetherester elastomer; about 20 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer; about 40 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer; about 20 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer; about 40 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer; about 40 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer; or about 20 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer.
In a further aspect, at least about 50 weight percent of the short chain ester units represented by formula II are the same.
In a further aspect, the thermoplastic copolyetherester elastomer comprises polybutylene terephthalate blocks and poly (tetramethylene ether) terephthalate blocks, wherein the polybutylene terephthalate blocks constitute from about 95 weight percent to about 5 weight percent of the thermoplastic copolyetherester elastomer, wherein the poly (tetramethylene ether) terephthalate blocks constitute from about 5 weight percent to about 95 weight percent of the thermoplastic copolyetherester elastomer, and wherein the poly (tetramethylene ether) terephthalate blocks have a number average molecular weight of from about 200 daltons to about 6000 daltons.
In a further aspect, the thermoplastic copolyetherester elastomer comprises polybutylene terephthalate blocks and poly (tetramethylene ether) terephthalate blocks, wherein the polybutylene terephthalate blocks constitute from about 70 weight percent to about 20 weight percent of the thermoplastic copolyetherester elastomer, wherein the poly (tetramethylene ether) terephthalate blocks constitute from about 5 weight percent to about 95 weight percent of the thermoplastic copolyetherester elastomer, and wherein the poly (tetramethylene ether) terephthalate blocks have a number average molecular weight of from about 200 daltons to about 6000 daltons.
In a further aspect, the thermoplastic copolyetherester elastomer comprises polybutylene terephthalate blocks and poly (tetramethylene ether) terephthalate blocks, wherein the polybutylene terephthalate blocks constitute from about 80 weight percent to about 30 weight percent of the thermoplastic copolyetherester elastomer, wherein the poly (tetramethylene ether) terephthalate blocks constitute from about 5 weight percent to about 95 weight percent of the thermoplastic copolyetherester elastomer, and wherein the poly (tetramethylene ether) terephthalate blocks have a number average molecular weight of from about 200 daltons to about 6000 daltons.
In a further aspect, the thermoplastic copolyetherester elastomer comprises polybutylene terephthalate blocks and poly (tetramethylene ether) terephthalate blocks, wherein the polybutylene terephthalate blocks constitute from about 70 weight percent to about 20 weight percent of the thermoplastic copolyetherester elastomer, wherein the poly (tetramethylene ether) terephthalate blocks constitute from about 30 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer, and wherein the poly (tetramethylene ether) terephthalate blocks have a number average molecular weight of from about 200 daltons to about 6000 daltons.
In a further aspect, the poly (tetramethylene ether) terephthalate block has a molecular weight of from about 800 daltons to about 1200 daltons; from about 1500 daltons to about 2500 daltons; or a number average molecular weight of about 1000 daltons to about 3000 daltons.
In various aspects, the thermoplastic elastomer used to prepare the foam particles comprises a thermoplastic polyurethane elastomer. In still further aspects, the thermoplastic polyurethane elastomer is selected from the group consisting of thermoplastic polyester-polyurethane elastomers, thermoplastic polyether-polyurethane elastomers, thermoplastic polycarbonate-polyurethane elastomers, thermoplastic polyolefin-polyurethane elastomers, any copolymers thereof, and any blends thereof. In yet a further aspect, the thermoplastic polyurethane elastomer is a thermoplastic polyester-polyurethane elastomer. In still further aspects, the thermoplastic polyurethane elastomer is a thermoplastic polyether-polyurethane elastomer. In yet a further aspect, the thermoplastic polyurethane elastomer is a thermoplastic polycarbonate-polyurethane elastomer.
The thermoplastic polyurethane from which the foam particles are made may have a melt index (also referred to as melt flow index or melt flow rate) of at least about 160 grams/10 minutes (21.6 kilograms at 190 degrees celsius) as measured according to ASTM D1238. In various embodiments, the melt index can be from about 160 grams/10 minutes to about 250 grams/10 minutes (at 190 degrees celsius, 21.6 kilograms) or from about 160 grams/10 minutes to about 220 grams/10 minutes (at 190 degrees celsius, 21.6 kilograms), in each case as measured according to ASTM D1238.
Thermoplastic polyurethanes can be produced via the reaction of (a) diisocyanates with difunctional compounds reactive toward isocyanates. Typically, the difunctional compound has two hydroxyl groups (diols) and may have a molar mass of from 62 daltons (molar mass of ethylene glycol) to about 10,000 daltons, although difunctional compounds (e.g., secondary amines) with other isocyanate groups may typically be used in small amounts, and a limited mole fraction of trifunctional and monofunctional isocyanate-reactive compounds may be used. Preferably, the polyurethane is linear. Including difunctional compounds having a molar mass of about 400 or greater, to incorporate the soft segment into the polyurethane. The increased ratio of soft segments to hard segments in the polyurethane causes the polyurethane to become increasingly flexible and eventually elastomeric. In certain aspects, such as when the molded article is an outsole for an article of footwear, the particles may be advantageously prepared using a rigid thermoplastic polyurethane or a combination of thermoplastic polyurethanes. In various other aspects, such as when the molded article is a midsole for footwear, the particles may be advantageously prepared using an elastomeric thermoplastic polyurethane or a combination of elastomeric thermoplastic polyurethanes.
Suitable thermoplastic polyurethanes include thermoplastic polyester-polyurethanes, polyether-polyurethanes, and polycarbonate-polyurethanes. Non-limiting suitable examples of these include, but are not limited to, polyurethanes polymerized using the following as the diol reactant: polyester diols prepared from diols and dicarboxylic acids or anhydrides; polylactone polyester diols (e.g., polycaprolactone diols); polyester diols prepared from a hydroxy acid which is a monocarboxylic acid containing one hydroxyl group; polytetrahydrofuran diol; polyether glycols prepared from ethylene oxide, propylene oxide or a combination of ethylene oxide and propylene oxide; and polycarbonate diols such as polyhexamethylene carbonate diol and poly (hexamethylene-co-pentamethylene) carbonate diol. Elastomeric thermoplastic polyurethanes may be prepared by the reaction of one of these polymeric diols (polyester diol, polyether diol, polylactone diol, polytetrahydrofuran diol, polycarbonate diol), one or more polyisocyanates, and optionally one or more monomeric chain extension compounds. Chain extending compounds are compounds having two or more functional groups, preferably two functional groups, reactive with isocyanate groups. Preferably, the elastomeric thermoplastic polyurethane is substantially linear (i.e., substantially all of the reactants are difunctional).
Non-limiting examples of polyester diols used to form the elastomeric thermoplastic polyurethane include polyester diols prepared by polycondensation of dicarboxylic acid compounds, their anhydrides, and their polymerizable esters (e.g., methyl esters) with diol compounds. Preferably, all reactants are difunctional, although minor amounts of monofunctional, trifunctional, and higher functionality materials (possibly up to several mole percent) may be included. Suitable dicarboxylic acids include, but are not limited to, glutaric acid, succinic acid, malonic acid, oxalic acid, phthalic acid, hexahydrophthalic acid, adipic acid, maleic acid, anhydrides of these dicarboxylic acids, and mixtures thereof. Suitable polyols include, but are not limited to, wherein the extender is selected from the group consisting of: ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, cyclohexanedimethanol, 2-ethyl-1, 6-hexanediol, 1, 4-butanediol, 1, 5-pentanediol, 1, 3-propanediol, butanediol, neopentyl glycol, and combinations thereof. Sometimes small amounts of triols or higher functionality polyols, such as trimethylolpropane or pentaerythritol, are included. In a preferred aspect, the carboxylic acid comprises adipic acid and the diol comprises 1, 4-butanediol. Typical catalysts for the esterification polymerization are protonic acids, Lewis acids, titanium alkoxides and dialkyltin oxides.
Hydroxycarboxylic acid compounds such as 12-hydroxystearic acid may also be polymerized to produce polyester diols. Such a reaction may be carried out with or without an initiating diol such as one of the diols already mentioned.
The polylactone diol reactant may also be used to prepare elastomeric thermoplastic polyurethanes. The polylactone diols can be prepared by reacting a diol initiator, for example a diol such as ethylene glycol or propylene glycol or another of the already mentioned diols, with the lactone. Lactones that can be ring opened by active hydrogen such as, but not limited to, epsilon-caprolactone, gamma-caprolactone, beta-butyrolactone, beta-propiolactone, gamma-butyrolactone, alpha-methyl-gamma-butyrolactone, beta-methyl-gamma-butyrolactone, gamma-valerolactone, delta-valerolactone, gamma-decalactone, delta-decalactone, gamma-nonalactone, gamma-octalactone, and combinations of these can be polymerized. The lactone ring may be substituted with an alkyl group of 1 to 7 carbon atoms. In a preferred aspect, the lactone is E-caprolactone. Useful catalysts include those mentioned above with respect to polyester synthesis. Alternatively, the reaction may be initiated by the formation of a sodium salt of the hydroxyl group on the molecule that will react with the lactone ring.
Tetrahydrofuran can be prepared by using a counterion such as SbF6 -、AsF6 -、PF6 -、SbCl6 -、BF4 -、CF3SO3 -、FSO3 -And ClO4 -Polymerization by a cationic ring-opening reaction. Initiation is by the formation of a tertiary oxonium ion. The polytetrahydrofuran segment can be prepared as a "living polymer" and terminated by reaction with the hydroxyl groups of a diol, such as any of the diols mentioned above.
The aliphatic polycarbonate may be prepared by polycondensation of an aliphatic diol with a dialkyl carbonate (such as diethyl carbonate), a cyclic diol carbonate (such as a cyclic carbonate having five-membered and six-membered rings), or diphenyl carbonate in the presence of a catalyst such as an alkali metal, a tin catalyst, or a titanium compound. Or diphenyl carbonate. Another way to produce aliphatic polycarbonates is ring-opening polymerization of cyclic aliphatic carbonates catalyzed by organometallic catalysts. Polycarbonate diols may also be produced by copolymerization of epoxides with carbon dioxide. Aliphatic polycarbonate diols are prepared by reacting a diol with a dialkyl carbonate (such as diethyl carbonate), diphenyl carbonate or dioxolanones (such as cyclic carbonates having five-membered and six-membered rings) in the presence of a catalyst such as an alkali metal, a tin catalyst or a titanium compound. Useful diols include, but are not limited to, any of the diols already mentioned. Aromatic polycarbonates are generally prepared by the reaction of bisphenols, such as bisphenol a, with phosgene or diphenyl carbonate.
Synthetic polymer diols used to make the elastomeric thermoplastic polyurethanes, such as the polymer polyester diols and polyether diols described above, preferably have a number average molecular weight (e.g., as determined by the method of ASTM D-4274) of from about 300 daltons to about 8,000 daltons, or from about 300 daltons to about 5000 daltons, or from about 300 daltons to about 3000 daltons.
The synthesis of the thermoplastic polyurethane may be carried out by reacting one or more of the polymer diols, one or more compounds having at least two (preferably two) isocyanate groups and optionally one or more chain extenders. The elastomeric thermoplastic polyurethane is preferably linear and thus the polyisocyanate component is preferably substantially difunctional. Useful diisocyanate compounds for preparing elastomeric thermoplastic polyurethanes include, but are not limited to, methylene bis-4-cyclohexyl isocyanate; cyclohexylidene diisocyanate (CHDI); isophorone diisocyanate (IPDI); m-tetramethylxylylene diisocyanate (m-TMXDI); p-tetramethylxylylene diisocyanate (p-TMXDI); ethylene diisocyanate; 1, 2-diisocyanatopropane; 1, 3-diisocyanatopropane; 1, 6-diisocyanatohexane (hexamethylene diisocyanate or HDI); 1, 4-butylene diisocyanate; lysine diisocyanate; 1, 4-methylenebis (cyclohexyl isocyanate); 2, 4-tolylene ("toluene") diisocyanate and 2, 6-Tolylene Diisocyanate (TDI); 2,4' -methylene diphenyl diisocyanate (MDI); 4,4' -methylene diphenyl diisocyanate (MDI); o-xylylene diisocyanate, m-xylylene diisocyanate, and p-Xylylene Diisocyanate (XDI); 4-chloro-1, 3-phenylene diisocyanate; naphthylene diisocyanates including 1, 2-naphthylene diisocyanate, 1, 3-naphthylene diisocyanate, 1, 4-naphthylene diisocyanate, 1, 5-naphthylene diisocyanate and 2, 6-naphthylene diisocyanate; 4,4' -dibenzyl diisocyanate; 4,5' -diphenyl diisocyanate; 4,4 '-diisocyanatodibenzyl (4, 4' -diisocyanatato-dinophenyl); 3,3 '-dimethoxy-4, 4' -biphenylene diisocyanate; 3,3 '-dimethyl-4, 4' -biphenylene diisocyanate; 1, 3-diisocyanatobenzene, 1, 4-diisocyanatobenzene, and combinations thereof. Particularly useful is diphenylmethane diisocyanate (MDI).
Useful active hydrogen-containing chain extenders typically contain at least two active hydrogen groups, for example, diols, dithiols, diamines, or compounds having hydroxyl groups, thiol groups, and mixtures of amine groups, such as alkanolamines, aminoalkyl mercaptans, and hydroxyalkyl mercaptans, among others. The molecular weight of the chain extender may range from about 60g/mol to about 400 g/mol. In some aspects, alcohols and amines are preferred. Typical examples of useful diols for use as polyurethane chain extenders include, but are not limited to, 1, 6-hexanediol; cyclohexanedimethanol (sold as CHDM by Eastman Chemical co.); 2-ethyl-1, 6-hexanediol; 1, 4-butanediol; ethylene glycol and lower oligomers of ethylene glycol including diethylene glycol, triethylene glycol and tetraethylene glycol; propylene glycol and lower oligomers of propylene glycol including dipropylene glycol, tripropylene glycol, and tetrapropylene glycol; 1, 3-propanediol; neopentyl glycol; dihydroxyalkylated aromatic compounds such as bis (2-hydroxyethyl) ether of hydroquinone and resorcinol; p-xylene- α, α' -diol; bis (2-hydroxyethyl) ether of p-xylene- α, α' -diol; meta-xylene-alpha, alpha' -diol and bis (2-hydroxyethyl) ether; 3-hydroxy-2, 2-dimethylpropyl-3-hydroxy-2, 2-dimethylpropionate; and mixtures thereof. Suitable diamine extenders include, but are not limited to, p-phenylenediamine, m-phenylenediamine, benzidine, 4 '-methylenedianiline, 4' -methylenebis (2-chloroaniline), ethylenediamine, and combinations of these. Other typical chain extenders are amino alcohols such as ethanolamine, propanolamine, butanolamine, and combinations of these. Preferred extenders include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, 1, 3-propanediol, 1, 4-butanediol, 1, 6-hexanediol, and combinations of these.
In addition to the difunctional extenders described above, minor amounts of trifunctional extenders such as trimethylolpropane, 1,2, 6-hexanetriol and glycerol, and/or monofunctional active hydrogen compounds such as butanol or dimethylamine may also be present. The amount of trifunctional extenders and/or monofunctional compounds employed will preferably be a few equivalent percent or less based on the total weight of the reaction product and active hydrogen-containing groups employed.
The reaction of the polyisocyanate, the polymer diol and optionally the chain extender is generally carried out in the presence of a catalyst, typically by heating the components. Typical catalysts for this reaction include organotin catalysts such as stannous octoate or dibutyltin dilaurate. In general, the ratio of polymer diol, such as polyester diol, to extender can vary over a relatively wide range, depending greatly on the desired hardness of the elastomeric thermoplastic polyurethane. For example, the equivalent ratio of polyester diol to extender may range from 1:0 to 1:12, and more preferably from 1:1 to 1: 8. Preferably, the diisocyanates employed are proportioned such that the overall ratio of equivalents of isocyanate to equivalents of active hydrogen-containing material is in the range of 0.95:1 to 1.10:1, and more preferably 0.98:1 to 1.04: 1. The polymeric diol segments are typically from about 25 weight percent to about 65 weight percent of the elastomeric thermoplastic polyurethane, and preferably from about 25 weight percent to about 50 weight percent of the elastomeric thermoplastic polyurethane.
In various aspects, the thermoplastic polyurethane elastomer used to prepare the foam particles comprises a long chain polyol. In still further aspects, the long chain polyol is selected from the group consisting of polyether polyols, polyester polyols, polycarbonate polyols, polyolefin polyols, polypropylene polyols, and any copolymers thereof. In yet further aspects, the long-chain polyol is a polyether polyol, a polyester polyol, and any copolymer thereof. In one aspect, the long chain polyol is a polyether polyol. In one aspect, the long chain polyol is a polyester polyol. In a further aspect, the long chain polyol has a number average molecular weight of no less than about 500 daltons. In still further aspects, the long chain polyol has a molecular weight of from about 500 daltons to about 10,000 daltons; about 600 daltons to about 6,000 daltons; or a number average molecular weight of about 800 daltons to about 4,000 daltons.
One non-limiting example of a commercially available elastomeric thermoplastic polyurethane having a melt flow index of from about 160 grams/10 minutes to about 220 grams/10 minutes (21.6 kilograms at 190 degrees celsius) suitable for making thermoplastic polyurethane foam particles is ELASTOLLAN SP9213 available from BASF Polyurethanes GmbH (melt flow index of 200 grams/10 minutes (21.6 kilograms at 190 degrees celsius)).
More rigid thermoplastic polyurethanes can be synthesized in the same manner but with lower levels of polymer diol segments. Rigidity of the filmThe thermoplastic polyurethane may, for example, comprise from about 0 to about 25 weight percent of polyester diol segments, polyether diol segments, or polycarbonate diol segments. The synthesis of rigid polyurethanes is well known in the art and is described in a number of references. Rigid thermoplastic polyurethanes having a melt index of at least about 160 grams/10 minutes (21.6 kilograms at 190 degrees celsius) as measured according to ASTM D1238 are commercially available and include those sold under the trade name Lubrizol corp
Suitable thermoplastic polyurea elastomers may be prepared by the reaction of one or more polymeric diamines or polyols with one or more of the polyisocyanates already mentioned and one or more diamine extenders. Non-limiting examples of suitable diamine extenders include ethylenediamine, 1, 3-propylenediamine, 2-methyl-pentylenediamine, hexamethylenediamine, 2, 4-trimethyl-1, 6-hexamethylenediamine and 2,4, 4-trimethyl-1, 6-hexamethylenediamine, imino-bis (propylamine), imide-bis (propylamine), N- (3-aminopropyl) -N-methyl-1, 3-propylenediamine, 1, 4-bis (3-aminopropoxy) butane, diethylene glycol di (aminopropyl) ether, 1-methyl-2, 6-diamino-cyclohexane, 1, 4-diamino-cyclohexane, 1, 3-bis (methylamino) cyclohexane or 1, 4-bis (methylamino) cyclohexane, Isophoronediamine, 1, 2-bis (sec-butylamino) cyclohexane or 1, 4-bis (sec-butylamino) cyclohexane, N '-diisopropylisophoronediamine, 4' -diaminodicyclohexylmethane, 3 '-dimethyl-4, 4' -diamino-dicyclohexylmethane, N '-dialkylaminodicyclohexylmethane and 3,3' -diethyl-5, 5 '-dimethyl-4, 4' -diaminodicyclohexylmethane. Polymeric diamines include polyoxyethylene diamine, polyoxypropylene diamine, poly (oxyethylene-oxypropylene) diamine, and poly (tetramethylene ether) diamine. It is also possible to use the amine-functional extenders and hydroxyl-functional extenders already mentioned. Typically, trifunctional reactants are limited, as before, and may be used in combination with monofunctional reactants to prevent crosslinking.
In various aspects, the thermoplastic elastomer comprises a thermoplastic polyamide elastomer. In further aspects, the thermoplastic polyamide elastomer comprises
Suitable thermoplastic polyamide elastomers may be obtained by: (1) polycondensation of (a) dicarboxylic acids such as oxalic acid, adipic acid, sebacic acid, terephthalic acid, isophthalic acid, 1, 4-cyclohexanedicarboxylic acid or any of the other dicarboxylic acids already mentioned with (b) diamines such as ethylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine or decamethylenediamine, 1, 4-cyclohexanediamine, m-xylylenediamine or any of the other diamines already mentioned; (2) ring opening polymerization of cyclic lactams such as epsilon-caprolactam or omega-laurolactam; (3) polycondensation of aminocarboxylic acids such as 6-aminocaproic acid, 9-aminononanoic acid, 11-aminoundecanoic acid or 12-aminododecanoic acid; or (4) copolymerization of cyclic lactams with dicarboxylic acids and diamines to prepare carboxylic acid-functional polyamide blocks, followed by reaction with polymeric ether glycols (polyoxyalkylene glycols), such as any of the polymeric ether glycols already mentioned. The polymerization may be performed, for example, at a temperature from about 180 degrees celsius to about 300 degrees celsius. Specific examples of suitable polyamide blocks include
In various aspects, the thermoplastic elastomer comprises at least one thermoplastic polystyrene elastomer. In a further aspect, the thermoplastic polystyrene elastomer is a styrene block copolymer elastomer. In a further aspect, the thermoplastic styrene block copolymer elastomer is a styrene ethylene butylene styrene block copolymer. In still further aspects, the styrenic block copolymer elastomer is poly (styrene-butadiene-styrene), poly (styrene-ethylene-co-butylene-styrene), poly (styrene-isoprene-styrene), any copolymer thereof, and any blend thereof.
In various aspects, the thermoplastic elastomer used to prepare the foam particles is characterized by a broad peak indicating the melting temperature (T) when determined using differential scanning calorimetrym) The range of (1). In further aspects, the melting temperature is from about 15 degrees Celsius to about 200 degrees Celsius or aboutA melting range of 50 degrees celsius to about 90 degrees celsius. In still further aspects, the melting temperature is characterized by a melting range from an initial onset to about 30 degrees celsius to about 150 degrees celsius of a melting temperature peak. In yet further aspects, the melting temperature is characterized by a melting range of at least about 30 degrees celsius or by a melting range of at least about 50 degrees celsius.
Methods of characterizing the disclosed articles.
There are several methods in the art to measure the resiliency and/or energy return of a foam. One method of measuring the resiliency of a foam is based on ASTM D2632-92, which is a test for solid rubber materials. For use with foams, test samples were prepared as described in ASTM D2632-92, but samples of foam were used instead of samples of solid rubber. The test uses a plunger that drops from a height onto the test sample while being guided by a vertical rod. The drop height was divided into 100 equal parts and the height of plunger rebound was measured using this 100 part scale to determine the elasticity of the sample. Alternative methods may also be used which use a standard weight ball dropped onto the sample and measure the rebound height of the ball to determine the elasticity of the sample. In some aspects, the elasticity and/or energy return is determined using a force/displacement behavior determined using methods known to those skilled in the art.
In various aspects, the force/displacement behavior of the disclosed articles can be measured using Instron electropulses E10000(Instron, Norwood, Massachusetts, USA) with a stainless steel 45 mm circular cross-sectional impact geometry. The test foam slab may be about 10 millimeters, although thinner or thicker foam slabs may also be used. Each sample can be evaluated through two different compression cycles: "running" and "walking". The "run" compression cycle consists of: the sample was compressed from 0 newton to 300 newtons and back to 0 newtons within 180 milliseconds under displacement control, then paused for 400 milliseconds for a total of-1.7 hertz. The "walk" compression cycle consists of: the sample compressed from 0 newton to 144 newtons and returned to 0 newtons within 600 milliseconds, then paused for 400 milliseconds, totaling-1 hertz.
Compression may be measured by preparing samples of the foam at standard thickness (e.g., 10 mm). Samples having a thickness less than the standard may be stacked to produce samples having a standard thickness. The sample is loaded into a metal compression plate and compressed to a height of 50% of the original thickness (e.g., 5 mm). The sample was placed in an oven at 50 degrees celsius on its side for 6 hours. At the end of 6 hours, the samples were removed from the oven and from the metal compression plates and allowed to cool for 30 minutes. After cooling, the thickness of the sample was measured. Percent compression set (C.S.) was calculated by: (a) subtracting the final sample thickness from the original sample thickness, and (b) subtracting 50% of the compressed thickness from the original sample thickness, (c) dividing (a) by (b), and (d) multiplying the result by 100 to obtain the percent compression set (where all thicknesses are measured in millimeters).
The energy input can be viewed as the integral of the force-displacement curve during the compressive force load. The hysteresis is considered as the ratio: (energy output)/(energy input), which can also be considered as the energy efficiency of the foam. Fatigue behavior is judged by the change in foam displacement at the maximum load of the cycle. All measured properties: stiffness, hysteresis, and fatigue are measured for multiple cycles of both the running compression cycle and the walking compression cycle. Using the above typical characterization of the compression sequence, 5000 cycles can be run, which simulates walking/running of about 5-10 miles, and takes about 45 minutes of testing time on an Instron Electropuls E10000 instrument. Longer runs of up to 100,000 compression cycles can be performed to simulate accelerated material response for 100-200 mile use.
Tensile strength may be measured on die-cut samples of dumbbell-shaped articles of standard dimensions, such as a width of 2.5 centimeters, a length of 11.5 centimeters, and a minimum thickness of 3 millimeters to 4 millimeters. The dumbbells follow the shape described in ASTM D412, mold C. The samples were loaded symmetrically into a long travel extensometer (long travel extensometer), such as the Instron 2603-. The tensile value at the point of failure (the point during the test when the load value initially dropped) of the sample was recorded.
Unless expressly stated otherwise, it is in no way intended that any method set forth herein be construed as requiring that its steps be performed in a specific order. Thus, where a method claim does not actually recite an order to be followed by its steps or it is not otherwise specifically stated in the claims or descriptions that the steps are to be limited to a specific order, it is no way intended that an order be inferred, in any respect. This applies to any possible non-explicit basis for interpretation, including: logical issues regarding the arrangement of steps or operational flow; simple meaning derived from grammatical organization or punctuation; and the number or type of aspects described in the specification.
Definition of
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the specification and relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.
As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "foam particles," "midsole" or "adhesive" includes, but is not limited to, two or more such foam particles, midsoles or adhesives, and the like.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As used herein, substantially (in substanced) or substantially (substantailly) means at least 50%, 60%, 75%, 90%, 95% or more as determined on a weight or volume basis.
The terms first, second, third and the like may be used herein to describe various elements, components, regions, layers and/or sections. These elements, components, regions, layers, and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, first component, first region, first layer, or first section discussed below could be termed a second element, second component, second region, second layer, or second section without departing from the teachings of the embodiment configurations.
As used herein, the modifiers "upper," "lower," "top," "bottom," "upward," "downward," "vertical," "horizontal," "longitudinal," "lateral," "front," "rear," etc., unless otherwise defined or clear from the disclosure, are relative terms that refer to various structures or orientations of the structures in which the article of footwear is placed in the context of an article of footwear worn by a user standing on a flat horizontal surface.
It should be noted that ratios, concentrations, amounts, and other numerical data may be expressed herein in a range format. Where the stated range includes one or both of the extremes, ranges excluding either or both of those included extremes are also encompassed within the disclosure, e.g., the phrase "x to y" includes ranges from 'x' to 'y' as well as ranges greater than 'x' and less than 'y'. Ranges can also be expressed as upper limits, e.g., 'about x, y, z, or less' and should be interpreted to include specific ranges of 'about x', 'about y', and 'about z' as well as ranges of 'less than x', 'less than y', and 'less than z'. Likewise, the phrase 'about x, y, z or greater' should be construed to include specific ranges of 'about x', 'about y', and 'about z' as well as ranges of 'greater than x', 'greater than y', and 'greater than z'. Further, the phrase "about 'x' to 'y'", where 'x' and 'y' are numerical values, includes "about 'x' to about 'y'". It is to be understood that such a range format is used for convenience and brevity, and thus, should be interpreted in a flexible manner to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. For purposes of this specification, a numerical range of "about 0.1% to 5%" should be interpreted to include not only the explicitly recited values of about 0.1% to about 5%, but also include individual values (e.g., 1%, 2%, 3%, and 4%) and sub-ranges (e.g., 0.5%, 1.1%, 2.4%, 3.2%, and 4.4%) within the indicated range.
As used herein, the terms "about (about)", "about (approximate)", "at (at) or about" and "substantially" mean that the amount or value in question may be an exact value or a value that provides an equivalent result or effect to that recited in the claims or taught herein. That is, it is to be understood that the amounts, sizes, formulations, parameters, and other quantities and characteristics are not, and need not be, exact, but may be approximate and/or larger or smaller, as desired, reflecting tolerances, conversion factors, rounding off, measurement error and the like, and other factors known to those of skill in the art such that an equivalent result or effect is obtained. In some cases, values that provide equivalent results or effects cannot be reasonably determined. In such cases, it will generally be understood that, as used herein, "about" and "at or about" mean a change of 10% plus or minus the nominal value indicated, unless otherwise indicated or inferred. Generally, an amount, size, formulation, parameter, or other quantity or characteristic is "about", or "at or about", whether or not explicitly stated to be so. It is understood that where "about," "approximately," or "at or about" is used before a quantitative value, a parameter also includes the specific quantitative value itself, unless specifically stated otherwise.
Reference to a "chemical compound" refers to one or more molecules of the chemical compound, and is not limited to a single molecule of the chemical compound. Further, one or more molecules may or may not be the same, so long as they fall under the category of the chemical compound. Thus, for example, "polyamide" is to be construed as including one or more polymer molecules of the polyamide, where the polymer molecules may or may not be the same (e.g., different molecular weights and/or isomers).
The terms "at least one" and one or more of an element "are used interchangeably and have the same meaning, are meant to include both a single element and a plurality of elements, and may also be indicated at the end of an element by the suffix(s). For example, "at least one polyamide", "one or more polyamides" and "polyamide(s)" may be used interchangeably and have the same meaning.
As used herein, the term "optional" or "optionally" means that the subsequently described component, event, or circumstance may or may not occur, and that the description includes instances where said component, event, or circumstance occurs and instances where it does not.
When recited in the claims, the term "receive," such as for "receiving an upper for an article of footwear," is not intended to require any particular delivery or receipt of the received item. Rather, the term "receiving" is used merely to recite an item that will be referred to in the claims' subsequent elements for purposes of clarity and ease of reading.
As used herein, the terms "percent by weight," "weight percent," "wt%" and "wt.%," which may be used interchangeably, refer to the weight percent of a given component based on the total weight of the composition or article, unless otherwise indicated. That is, all weight percent values are based on the total weight of the composition, unless otherwise specified. It is understood that the sum of the weight percent values of all components in the disclosed compositions or formulations equals 100. Similarly, the terms "percent by volume," "vol%" and "vol.%," which may be used interchangeably, indicate the percentage by volume of a given component based on the total volume of the composition or article, unless otherwise indicated. That is, all volume percent values are based on the total volume of the composition or article, unless otherwise indicated. It is understood that the sum of the volume percent values of all components in the disclosed composition or formulation or article is equal to 100.
Compounds are described using standard nomenclature. For example, any position not substituted by any indicated group is understood to have its valency filled by a bond as indicated, or a hydrogen atom. A dash ("-") that is not between two letters or symbols is used to indicate an attachment point for a substituent. For example, -CHO is attached through the carbon of the carbonyl group. Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As used herein, the term "effective amount" refers to an amount sufficient to effect a desired change in a physical property of a composition or material. For example, an "effective amount" of a filler refers to an amount sufficient to achieve a desired improvement in a property modulated by a formulation component, e.g., an amount to achieve a desired level of modulus. The specific level in terms of weight percent of the composition required as an effective amount will depend on a variety of factors including the amount and type of polycarbonate, the amount and type of thermally conductive filler, and the end use of the article manufactured using the composition.
As used herein, the term "optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes instances where said event or circumstance occurs and instances where it does not.
As used herein, the term "unit" may be used to refer to an individual (co) monomer unit, such that, for example, a styrene repeat unit refers to an individual styrene (co) monomer unit in the polymer. Furthermore, the term "unit" can be used to refer to a polymer block unit, such that, for example, "styrene repeat unit" can also refer to a polystyrene block; "units of polyethylene" refers to block units of polyethylene; "units of polypropylene" refers to block units of polypropylene; "units of polybutene" refers to block units of polybutene and the like. Such usage will be clear from the context.
The term "copolymer" refers to a polymer having two or more monomeric species, and includes terpolymers (i.e., copolymers having three monomeric species).
Unless otherwise indicated, the temperatures referred to herein are determined at standard atmospheric pressure (i.e., 1 atm).
Disclosed are the components used to prepare the compositions of the present invention, as well as the compositions themselves used in the methods disclosed herein. These and other materials are disclosed herein, and it is understood that when combinations, subsets, interactions, groups, etc. of these materials are disclosed that while specific reference of each various individual and collective combinations and permutation of these compounds may not be explicitly disclosed, each is specifically contemplated and described herein. For example, if a particular compound is disclosed and discussed, and a number of modifications that can be made to a number of molecules that include the compound are discussed, each and every combination and permutation of the compound, and the modifications that are possible, are specifically contemplated unless specifically indicated to the contrary. Thus, if a class of molecules A, B and C and a class of molecules D, E and F are disclosed, and examples of combination molecules A-D are disclosed, then even if each is not individually recited, each is individually and collectively intended to be combined, A-E, A-F, B-D, B-E, B-F, C-D, C-E and C-F are considered disclosed. Likewise, any subset or combination of these is also disclosed. Thus, for example, the subgroups of A-E, B-F and C-E will be considered disclosed. This concept applies to all aspects of this application including, but not limited to, steps in methods of making and using the compositions of the present invention. Thus, if there are a variety of additional steps that can be performed it is understood that each of these additional steps can be performed with any particular aspect or combination of aspects of the methods of the present invention.
The term "alkyl group" as used herein is a branched or unbranched saturated hydrocarbon group of 1 to 24 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, pentyl, hexyl, heptyl, octyl, decyl, tetradecyl, hexadecyl, eicosyl, tetracosyl and the like. A "lower alkyl" group is an alkyl group containing from 1 to 6 carbon atoms.
The term "aryl group" as used herein is any carbon-based aromatic group including, but not limited to, benzene, naphthalene, and the like. The term "aromatic" also includes "heteroaryl groups," which are defined as aromatic groups having at least one heteroatom incorporated within the ring of the aromatic group. Examples of heteroatoms include, but are not limited to, nitrogen, oxygen, sulfur, and phosphorus. The aryl group may be substituted or unsubstituted. The aryl group may be substituted with one or more groups including, but not limited to, alkyl, alkynyl, alkenyl, aryl, halide, nitro, amino, ester, ketone, aldehyde, hydroxyl, carboxylic acid, or alkoxy.
The term "aralkyl" as used herein is an aryl group having an alkyl group, an alkynyl group or an alkenyl group as defined above attached to an aromatic group. An example of an aralkyl group is a benzyl group.
The term "organic residue" defines a carbon-containing residue, i.e., a residue comprising at least one carbon atom, and includes, but is not limited to, a carbon-containing group, residue, or group as defined above. The organic residue may contain various heteroatoms, including oxygen, nitrogen, sulfur, phosphorus, and the like, or may be bonded to another molecule through a heteroatom. Examples of organic residues include, but are not limited to, alkyl or substituted alkyl, alkoxy or substituted alkoxy, mono-or di-substituted amino, amide groups, and the like. The organic residue may preferably contain 1 to 18 carbon atoms, 1 to 15 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In further aspects, the organic residue can comprise 2 to 18 carbon atoms, 2 to 15 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, 2 to 4 carbon atoms, or 2 to 4 carbon atoms.
A close synonym for the term "residue" is the term "group", which, as used in the specification and concluding claims, refers to a fragment, group or substructure of a molecule described herein, regardless of how the molecule is prepared. For example, the 2, 4-dihydroxyphenyl group in a particular compound has the following structure:
regardless of whether 2, 4-dihydroxyphenyl is used to prepare the compound. In some aspects, a group (e.g., an alkyl group) may be further modified (i.e., a substituted alkyl group) by having one or more "substituent groups" bonded thereto. The number of atoms in a given group is not critical to the invention unless indicated to the contrary elsewhere herein.
As used herein, the term "number average molecular weight" or "Mn"may be used interchangeably and refers to the statistically average molecular weight of all polymer chains in a sample and is defined by the formula:
wherein M isiIs the molecular weight of the chain and NiIs the number of chains of this molecular weight. M of a polymer, such as a polycarbonate polymer, can be determined by methods well known to those of ordinary skill in the art using molecular weight standards, such as polycarbonate standards or polystyrene standards, preferably certified or traceable molecular weight standardsn。
And (5) carrying out the following steps.
The following list of exemplary aspects supports and is supported by the disclosure provided herein.
Aspect 1a method of forming an article, the method comprising: disposing a plurality of foam particles, wherein the disposed plurality of foam particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of foam particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of foam particles, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of foam particles with the binding material; and curing the deposited bonding material, within at least a bonding material target area, that coats at least a portion of the defined surface of the arranged plurality of foam particles, wherein curing comprises attaching at least a portion of the arranged plurality of foam particles to each other within the target area.
The method of
Aspect 3. the method of
Aspect 5 the method of aspect 3, wherein the applying energy comprises applying energy to at least a portion of the bonding material target region using a directed energy beam.
Aspect 7 the method of
The method of aspect 7, wherein the infrared energy source has a wavelength from about 1 micron to about 10 microns.
Aspect 9. the method of
Aspect 11 the method of any of aspects 1-10, wherein the bonding material comprises a thermal energy absorber.
Aspect 13 the method of
Aspect 15 the method of
Aspect 17 the method of aspect 15, wherein the hydrated salt is NiCl2·6H2O、Al2(SO4)3·18H2O or a combination thereof.
Aspect 19. the method of aspect 15, wherein the metal sulfide is Ag2S、CuS、MoS3、PbS、ZnS、FeS、FeS2Or a combination thereof.
Aspect 21 the method of aspect 15, wherein the metal nitride is TiN.
Aspect 23. the method of
Aspect 25. the method of any of aspects 15-24, wherein the microwave energy absorber further comprises water.
The method of any of aspects 15-25, wherein the microwave energy absorber has an average particle size of from about 0.1 nanometers to about 50 microns.
The method of any of aspects 15-26, wherein the microwave energy absorber is present in the bonding material from about 0.1 weight percent to about 25 weight percent based on the total weight of the bonding material.
The method of
Aspect 31 the method of aspect 29, wherein the metal complex compound comprises a zinc oxide comprising at least one element selected from the group consisting of In, Ga, Al, and Sb, or a combination thereof.
The method of any of aspects 28-32, wherein the infrared energy absorber is present in the bonding material from about 0.001 weight percent to about 0.08 weight percent based on the total weight of the bonding material.
The method of any of aspects 28-32, wherein the infrared energy absorber is present in the bonding material from about 0.005 weight percent to about 0.06 weight percent based on the total weight of the bonding material.
The method of any of aspects 1-3, wherein the binding material comprises one or more monomers, one or more polymers, or a combination thereof; and wherein curing comprises: forming at least one chemical bond between one or more monomers, one or more polymers, or a combination thereof of the binding material; and/or forming at least one chemical bond between at least a portion of the coated defining surface of the arranged plurality of foam particles in the binding material target area and one or more monomers, one or more polymers, or a combination thereof of the binding material; thereby attaching at least a portion of the arranged plurality of foam particles in the bonding material target area that are coated to each other or to uncoated foam particles.
The method of
Aspect 37. the method of
The method of
The method of
The method of any of aspects 35-39, wherein the binding material comprises a solution of one or more monomers, one or more polymers, or a combination thereof in a solvent.
The method of any of aspects 35-39, wherein the binding material comprises a suspension of one or more monomers, one or more polymers, or a combination thereof in a solvent.
The method of
Aspect 43 the method of any one of aspects 40-42, wherein the solvent is water or an aqueous solution.
The method of aspect 43, wherein the aqueous solution comprises acetic acid, formic acid, trifluoroacetic acid, or a combination thereof.
Aspect 45 the method of any one of aspects 40-42, wherein the solvent is an organic solvent.
Aspect 47. the method of any one of aspects 40-42, wherein the solvent is a mixed solvent system comprising a combination of at least two solvents selected from the group consisting of acetic acid, formic acid, trifluoroacetic acid, tetrahydrofuran, chlorophenol, dimethylformamide, hexafluoroisopropanol, and dichloromethane.
Aspect 48. the method of aspect 47, wherein the mixed solvent system comprises formic acid and dichloromethane; formic acid and acetic acid; formic acid and chlorophenol; or formic acid and hexafluoroisopropanol.
The method of any of aspects 35-46, wherein the bonding material further comprises an Ultraviolet (UV) radiation photo-activated free radical polymerization initiator, a thermal energy activated polymerization initiator, or a combination thereof.
Aspect 51 the method of
Aspect 53 the method of
Aspect 54 the method of any of aspects 50-53, wherein the applying energy comprises applying a source of thermal energy.
Aspect 55 the method of aspect 54, wherein the thermal energy source is a radiant heat source, a steam heat source, or a combination thereof.
Aspect 56 the method of aspect 54, wherein the thermal energy source is an infrared energy source.
Aspect 57 the method of aspect 54, wherein the thermal energy source is a microwave energy source.
Aspect 58 the method of aspect 57, wherein the microwave energy source has a wavelength from about 0.1 centimeters to about 20 centimeters.
Aspect 61 the method of
Aspect 63 the method of
Aspect 65 the method of
Aspect 67. the method of any one of aspects 59-66, wherein depositing the solvent comprises misting (atomizing), volatilizing, misting (misting), or a combination thereof.
Aspect 68. the method of aspect 67, wherein the solvent is substantially steam.
Aspect 69 the method of any of aspects 1-3, wherein the depositing comprises depositing a first bonding material and a second bonding material; wherein the first bonding material comprises a solvent; wherein the second bonding material comprises a bonding thermoplastic elastomer material soluble in a solvent; and wherein the curing comprises removing solvent and curing a bonding thermoplastic elastomer material on at least a portion of the defined surface of the arranged foam particles; thereby attaching at least a portion of the arranged plurality of foam particles in the bonding material target area to each other or to uncoated foam particles.
Aspect 71 the method of
Aspect 73. the method of aspect 69, wherein the first bonding material and the second bonding material are deposited simultaneously.
Aspect 74 the method of aspect 73, wherein the first bonding material and the second bonding material form a suspension; and wherein the suspension is deposited.
Aspect 75 the method of aspect 73, wherein the first binding material and the second binding material form a solution; and wherein the solution is deposited.
The method of any of aspects 69-75, wherein the first bonding material is deposited from one or more first nozzles; and wherein the second bonding material is deposited from one or more second nozzles.
Aspect 77 the method of any one of aspects 69-75, wherein the first bonding material and the second bonding material are deposited via the same nozzle or a plurality of nozzles.
Aspect 78 the method of aspect 77, wherein the first bonding material and the second bonding material are mixed in one or more chambers before being delivered to the nozzle or nozzles.
Aspect 79 the method of any one of aspects 69-78, wherein the solvent is water or an aqueous solution.
The method of
Aspect 81. the method of any one of aspects 69-78, wherein the solvent is an organic solvent.
Aspect 82 the method of aspect 81, wherein the organic solvent is tetrahydrofuran, dimethylformamide, hexafluoroisopropanol, dichloromethane, or a combination thereof.
The method of aspect 83. the method of aspect 69, wherein the solvent is a mixed solvent system comprising a combination of at least two solvents selected from the group consisting of acetic acid, formic acid, trifluoroacetic acid, tetrahydrofuran, chlorophenol, dimethylformamide, hexafluoroisopropanol, and dichloromethane.
Aspect 84. the method of aspect 83, wherein the mixed solvent system comprises formic acid and dichloromethane; formic acid and acetic acid; formic acid and chlorophenol; or formic acid and hexafluoroisopropanol.
Aspect 85. the method of any one of aspects 69-84, wherein the dissolved thermoplastic polymer is independently the thermoplastic polymer, starch, protein, carbohydrate, lipid, fatty acid, or combination thereof of any one of aspects 115-182.
Aspect 86 the method of any of aspects 1-85, wherein disposing the plurality of foam particles comprises forming a layer comprising the plurality of foam particles.
Aspect 87. the method of aspect 86, wherein the layer has a substantially planar configuration.
The method of any of aspects 86-87, wherein the article is formed from a single layer.
The method of any of aspects 1-88, wherein the disposing, the depositing, and the curing are repeated.
Aspect 90 the method of aspect 89, wherein the iteration of the arranging comprises forming a layer comprising a plurality of foam particles.
Aspect 91 the method of aspect 90, wherein the article is formed layer by layer from a plurality of layers.
Aspect 92. the method of any one of aspects 1-91, wherein the plurality of foam particles are irregularly shaped.
The method of aspect 92, wherein the plurality of foam particles have an aspect ratio of about 0.1 to about 1.0.
The method of aspect 94, wherein the plurality of foam particles have a number average circularity value of from about 0.60 to about 0.99.
The method of aspect 95. the method of any of aspects 1-91, wherein the plurality of foam particles have a number average circularity value of from about 0.89 to about 0.99.
The method of any of aspects 1-91, wherein the plurality of foam particles have a number average circularity value from about 0.92 to about 0.99.
Aspect 97 the method of any of aspects 1-91, wherein the plurality of foam particles are ellipsoidal in shape.
Aspect 98. the method of any one of aspects 1-91, wherein the plurality of foam particles are substantially spherically shaped.
Aspect 99 the method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.3 millimeters to about 7 millimeters.
The method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 0.5 millimeters to about 5 millimeters.
Aspect 101. the method of any one of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1 millimeter to about 5 millimeters.
The method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1 millimeter to about 4 millimeters.
The method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1 millimeter to about 3 millimeters.
The method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1 millimeter to about 2 millimeters.
Aspect 105. the method of any one of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1.5 millimeters to about 5 millimeters.
The method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1.5 millimeters to about 4 millimeters.
Aspect 107 the method of any one of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1.5 millimeters to about 3 millimeters.
The method of any of aspects 1-98, wherein the plurality of foam particles have a number average particle size in the longest dimension of about 1.5 millimeters to about 2.5 millimeters.
Aspect 109. the method of any of aspects 1-108, wherein the plurality of foam particles comprises foam particles having a density of about 0.1 grams per cubic centimeter to about 0.8 grams per cubic centimeter.
Aspect 111. the method of aspect 109, wherein the foam particles have a density of about 0.32 grams per cubic centimeter to about 0.48 grams per cubic centimeter.
Aspect 112. the method of any of aspects 1-108, wherein the plurality of foam particles have a bulk density of about 80 grams per liter to about 200 grams per liter.
Aspect 113 the method of aspect 112, wherein the arranged plurality of foam particles has a bulk density of about 100 grams per liter to about 150 grams per liter.
Aspect 114. the method of aspect 112, wherein the arranged plurality of foam particles has a bulk density of about 110 grams per liter to about 140 grams per liter.
Aspect 115. the method of any of aspects 1-114, wherein the thermoplastic elastomeric material is selected from the group consisting of thermoplastic polyurethane elastomers, thermoplastic polyurea elastomers, thermoplastic polyether elastomers, thermoplastic copolyether ester elastomers, thermoplastic polyamide elastomers, thermoplastic polystyrene elastomers, thermoplastic polyolefin elastomers, thermoplastic copolyether amide elastomers, thermoplastic styrene diene copolymer elastomers, thermoplastic styrene block copolymer elastomers, thermoplastic polyamide elastomers, thermoplastic polyimide elastomers, any copolymers thereof, and any blends thereof.
Aspect 116. the method of aspect 115, wherein the thermoplastic elastomer material comprises a thermoplastic polyamide elastomer.
Aspect 117 the method of aspect 116, wherein the thermoplastic polyamide elastomer comprises
Aspect 118. the method of aspect 115, wherein the thermoplastic elastomeric material comprises a thermoplastic styrene block copolymer elastomer.
Aspect 119 the method of aspect 118, wherein the thermoplastic styrene block copolymer elastomer is a styrene ethylene butylene styrene block copolymer.
Aspect 121 the method of
and short-chain ester units of formula II:
wherein R is1Comprising divalent groups remaining after removal of terminal hydroxyl groups from a poly (alkylene ether) having a carbon to oxygen ratio of from about 2.0 to about 4.3 and a number average molecular weight of from about 400 daltons to about 6000 daltons; wherein R is2Comprising divalent groups remaining after removal of carboxyl groups from dicarboxylic acids having a molecular weight of less than about 300 daltons; wherein R is3Comprising divalent radicals remaining after removal of hydroxyl groups from low molecular weight diols having molecular weights of less than about 250 daltons; wherein R is4Comprising divalent groups remaining after removal of carboxyl groups from dicarboxylic acids having a molecular weight of less than about 300 daltons; wherein the long-chain ester units represented by formula I constitute from about 5 weight percent to about 95 weight percent of the thermoplastic copolyetherester elastomer; and wherein the thermoplastic copolyetherester elastomeric is comprised of short-chain ester units represented by formula IIAbout 95 weight percent to about 5 weight percent of the body.
Aspect 124. the method of
Aspect 125. the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 500 daltons to about 3500 daltons.
Aspect 126 the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 600 daltons to about 3000 daltons.
Aspect 127. the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 800 daltons to about 1200 daltons.
Aspect 128. the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 800 daltons to about 2000 daltons.
Aspect 129 the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 800 daltons to about 2500 daltons.
Aspect 130. the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 800 daltons to about 3000 daltons.
Aspect 131. the method according to any of aspects 123-124, wherein R1Having a number average molecular weight of from about 800 daltons to about 3500 daltons.
Aspect 132. the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 800 daltons to about 4000 daltons.
Aspect 133. the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 1000 daltons to about 3000 daltons.
Aspect 134 the method of any one of aspects 123-124, wherein R1Having a number average molecular weight of from about 1500 daltons to about 2500 daltons.
Aspect 135 the method of any one of aspects 123-134, wherein R2Including divalent radicals remaining after removal of carboxyl groups from aromatic dicarboxylic acids.
Aspect 136 the method of aspect 135, wherein the aromatic dicarboxylic acid is 1, 4-phthalic acid.
Aspect 137 the method of any of aspects 123-135, wherein R3Including divalent radicals remaining after removal of hydroxyl groups from C2-C6 alkyl diols.
Aspect 138. the method of aspect 137, wherein the C2-C6 alkyl diol is 1, 4-butanediol.
Aspect 139 the method of any one of aspects 123-138, wherein R4Is a divalent group remaining after removal of a carboxyl group from an aromatic dicarboxylic acid.
Aspect 141. the method according to any one of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 10 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 142. the method of any one of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 20 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 143. the method of any one of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 30 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 144. the method of any one of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 10 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 145. the method of any of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 20 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 146. the method of any of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 30 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 147. the method of any of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 10 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 148 the method of any of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 20 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 149. the method of any one of aspects 123-140, wherein the long-chain ester units represented by formula I constitute from about 30 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 150. the method of any one of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 20 weight percent to about 90 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 151. the method of any one of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 40 weight percent to about 90 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 152. the method of any one of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 20 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 153. the method of any one of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 40 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 154. the method of any of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 20 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 155. the method of any one of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 40 weight percent to about 70 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 156. the method of any one of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 40 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 157. the method of any of aspects 123-149, wherein the short-chain ester units represented by formula II constitute from about 20 weight percent to about 60 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 158. the method of any one of aspects 123-157, wherein at least about 50 weight percent of the short-chain ester units represented by formula II are the same.
Aspect 159. the method of any of aspects 120-122, wherein the thermoplastic copolyetherester elastomer comprises a polybutylene terephthalate block and a poly (tetramethylene ether) terephthalate block, wherein the polybutylene terephthalate block constitutes from about 95 weight percent to about 5 weight percent of the thermoplastic copolyetherester elastomer, wherein the poly (tetramethylene ether) terephthalate block constitutes from about 5 weight percent to about 95 weight percent of the thermoplastic copolyetherester elastomer, and wherein the poly (tetramethylene ether) terephthalate block has a number average molecular weight of from about 200 daltons to about 6000 daltons.
Aspect 161 the method of any of aspects 159-160, wherein the poly (tetramethylene ether) terephthalate block constitutes from about 30 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 162. the method of aspect 159, wherein the polybutylene terephthalate blocks constitute from about 70 weight percent to about 20 weight percent of the thermoplastic copolyetherester elastomer, wherein the poly (tetramethylene ether) terephthalate blocks constitute from about 30 weight percent to about 80 weight percent of the thermoplastic copolyetherester elastomer.
Aspect 163. the method of any of aspects 159-162, wherein the poly (tetramethylene ether) terephthalate block has a number average molecular weight of from about 800 daltons to about 1200 daltons.
Aspect 164. the method of any one of aspects 159-162, wherein the poly (tetramethylene ether) terephthalate block has a number average molecular weight of from about 1500 daltons to about 2500 daltons.
Aspect 165. the method of any one of aspects 159-162, wherein the poly (tetramethylene ether) terephthalate block has a number average molecular weight of from about 1000 daltons to about 3000 daltons.
Aspect 166. the method of aspect 115, wherein the thermoplastic elastomer material comprises a thermoplastic polyurethane elastomer.
Aspect 167 the method of aspect 166, wherein the thermoplastic polyurethane elastomer is selected from the group consisting of thermoplastic polyester-polyurethane elastomers, thermoplastic polyether-polyurethane elastomers, thermoplastic polycarbonate-polyurethane elastomers, thermoplastic polyolefin-polyurethane elastomers, any copolymers thereof, and any blends thereof.
Aspect 168. the method of aspect 167, wherein the thermoplastic polyurethane elastomer is a thermoplastic polyester-polyurethane elastomer.
Aspect 169. the method of aspect 167, wherein the thermoplastic polyurethane elastomer is a thermoplastic polyether-polyurethane elastomer.
Aspect 170. the method of aspect 167, wherein the thermoplastic polyurethane elastomer is a thermoplastic polycarbonate-polyurethane elastomer.
The method of aspect 167, aspect 171, wherein the thermoplastic polyurethane elastomer comprises a long chain polyol.
Aspect 172. the method of aspect 171, wherein the long-chain polyol is selected from the group consisting of polyether polyols, polyester polyols, polycarbonate polyols, polyolefin polyols, polypropylene polyols, and any copolymers thereof.
Aspect 173. the method of aspect 171, wherein the long-chain polyol is a polyether polyol, a polyester polyol, and any copolymers thereof.
Aspect 174 the method of aspect 171, wherein the long-chain polyol is a polyether polyol.
Aspect 175 the method of aspect 171, wherein the long-chain polyol is a polyester polyol.
Aspect 176. the method of any one of aspects 171 and 175, wherein the long chain polyol has a number average molecular weight of not less than about 500 daltons.
Aspect 177. the method of any one of aspects 171 and 175, wherein the long-chain polyol has a number average molecular weight of from about 500 daltons to about 10,000 daltons.
Aspect 178 the method of any one of aspects 171 and 175, wherein the long chain polyol has a number average molecular weight of about 600 daltons to about 6,000 daltons.
Aspect 179. the method of any one of aspects 171 and 175, wherein the long chain polyol has a number average molecular weight of about 800 daltons to about 4,000 daltons.
Aspect 181 the method of
Aspect 182. the method of aspect 181, wherein the styrene block copolymer elastomer is poly (styrene-butadiene-styrene), poly (styrene-ethylene-co-butylene-styrene), poly (styrene-isoprene-styrene), any copolymer thereof, and any blend thereof.
Aspect 183. the method of any of aspects 1-182, wherein the thermoplastic elastomer material is characterized by a melting temperature range of at least 10 degrees celsius over which both the first thermoplastic elastomer material and the second thermoplastic elastomer material exhibit softening and melting behavior as determined using differential scanning calorimetry.
Aspect 184 the method of aspect 183, wherein the range within which the thermoplastic elastomeric material exhibits softening and melting behavior is at least 35 degrees celsius.
Aspect 185 the method of aspect 184, wherein the range within which the thermoplastic elastomeric material exhibits softening and melting behavior is at least 50 degrees celsius.
Aspect 186 the method of aspect 183, wherein the melting temperature of the thermoplastic elastomer material is in a range from about 15 degrees celsius to about 200 degrees celsius.
Aspect 187 the method of aspect 186, wherein the melting temperature is in a range from about 30 degrees celsius to about 150 degrees celsius.
Aspect 188. the method of aspect 187, wherein the melting temperature is in a range from about 50 degrees celsius to about 90 degrees celsius.
The method of aspect 183, wherein the melting temperature of the thermoplastic elastomer material is at least about 30 degrees celsius.
Aspect 190 the method of aspect 189, wherein the melting temperature of the thermoplastic elastomer material is at least about 50 degrees celsius.
Aspect 191 the method of any one of aspects 1-190, wherein arranging the arranged plurality of foam particles comprises arranging using a roller mechanism, a wiper mechanism, or a blower mechanism.
Aspect 192. the method of aspect 184, wherein arranging the arranged plurality of foam particles comprises arranging using a roller mechanism.
Aspect 193 the method of aspect 192, wherein the roller mechanism has a smooth roller surface.
Aspect 194 the method of aspect 192, wherein the roller mechanism has a textured roller surface.
Aspect 195 the method of aspect 184, wherein arranging the arranged plurality of foam particles comprises arranging using a wiper mechanism.
Aspect 196 the method of any one of aspects 1-195, wherein disposing the disposed plurality of foam particles is disposing a layer of a plurality of foam particles.
Aspect 197 the method of aspect 5 or 53, wherein applying energy is applying directed energy to the targeted area of the bonding material.
Aspect 198 the method of aspect 195, wherein the directed energy is a laser beam.
Aspect 201 the method of aspects 196 or 197, wherein the laser beam comprises two or more laser beams, wherein each laser beam is directed at a target area.
Aspect 202 the method of any of aspects 196-199, wherein the laser beam has a beam width of about 0.1 mm to about 0.7 mm.
Aspect 203 the method of any of aspects 196-199, wherein the laser beam has a beam width of about 0.2 mm to about 0.6 mm.
Aspect 204 the method of any of aspects 196-199, wherein the laser beam has a beam width of about 0.3 mm to about 0.5 mm.
Aspect 205 the method of any of aspects 196-199, wherein the laser beam has a beam width of about 0.3 mm to about 0.4 mm.
Aspect 206 the method of any of aspects 196-199, wherein the laser beam has a scanning pattern such that each pass of the laser beam overlaps an adjacent pass of the laser beam by a fractional amount of about 0.1 to 0.5.
Aspect 207 the method of any of aspects 196-199, wherein the laser beam has a scan pattern such that each pass of the laser beam overlaps an adjacent pass of the laser beam by a fractional amount of about 0.3.
Aspect 208 the method of any of aspects 196-205, wherein the laser beam is defocused.
Aspect 209 the method of any of aspects 196-206, wherein the laser beam has a power output of about 25 watts to about 75 watts.
Aspect 210 the method of any of aspects 196-206, wherein the laser beam has a power output of about 35 watts to about 55 watts.
Aspect 211. the method of any of aspects 196-206, wherein the laser beam has a power output of about 45 watts to about 65 watts.
Aspect 212 the method of any of aspects 196-206, wherein the laser beam has a power output of about 50 watts to about 60 watts.
Aspect 213. the method of any of aspects 196-206, wherein the laser beam has a power output of about 55 watts.
Aspect 214 the method of any of aspects 196-206, wherein the laser beam has a power output of about 65 watts.
Aspect 215 the method of any one of
Aspect 216 the method of aspect 213, wherein the infrared spectrum is a far infrared spectrum.
Aspect 217 the method of aspect 213, wherein the infrared spectrum is near infrared spectrum.
Aspect 218. the method of aspect 213, wherein the infrared spectrum is a mid-infrared spectrum.
Aspect 219 the method of any one of aspects 213 and 216, wherein the infrared spectrum has a wavelength of about 700 nm to about 1 mm.
Aspect 220 the method of any one of aspects 213 and 216, wherein the infrared spectrum has a wavelength of about 1 micron to about 20 microns.
Aspect 221 the method of any one of aspects 213-216, wherein the infrared spectrum has a wavelength of about 3 microns to about 15 microns.
Aspect 222 the method of any one of aspects 213 and 216, wherein the infrared spectrum has a wavelength of about 3 microns to about 8 microns.
Aspect 223 the method of any one of aspects 213-216, wherein the infrared spectrum has a wavelength of about 8 microns to about 15 microns.
The method of any one of aspects 213 and 216, wherein the infrared spectrum has a wavelength of about 9 microns to about 11 microns.
Aspect 225. the method of any of aspects 86 or 90, further comprising providing an additive to the layer.
Aspect 226. the method of aspect 223, wherein the additive is provided during formation of the plurality of layers of foam particles.
Aspect 227 the method of aspect 223, wherein the additive is provided prior to the disposing, prior to the depositing, prior to the curing, after the curing, or a combination thereof.
Aspect 228. the method of any one of aspects 223-225, wherein the additive is a polyurea coating or a polyurethane coating.
Aspect 229. the method of aspect 226, wherein the polyurea coating or the polyurethane coating is sprayed onto the arranged plurality of foam particles.
Aspect 230. the method of any one of aspects 223-227, wherein the additive comprises a binder, a lubricant, an antioxidant, a colorant, a filler, or a combination thereof.
Aspect 231. the method of any of aspects 1-228, further comprising depositing the bonding material to a plurality of bonding material target areas, and applying energy to the plurality of bonding material target areas.
Aspect 232 the method of aspect 229, wherein the article has a boundary region defined by a subset of the plurality of bonding material target regions.
Aspect 233. the method of any one of aspects 229-230, wherein a first cross-sectional area of the article comprises a subset of the plurality of binding material target areas, and wherein energy is applied to the first cross-sectional area.
Aspect 234 the method of any of aspects 229-230, wherein a first cross-sectional area of the article comprises a subset of the plurality of binding material target areas, and wherein energy is not applied to the first cross-sectional area.
Aspect 235 the method of any one of aspects 229-232, wherein applying energy to the plurality of target areas is performed by directing energy to each of the binding material target areas using a vector scanning method.
Aspect 236 the method of any one of aspects 229-232, wherein applying energy to the plurality of target areas is performed by directing energy to each target area using a raster scan method.
Aspect 237 the method of any of aspects 229-234, wherein the plurality of target regions comprises a first plurality of target regions and a second plurality of target regions.
Aspect 238. an article manufactured by the method of any one of aspects 1-235.
Aspect 239 the article of aspect 238, wherein the article is a component for manufacturing an article of footwear, an article of apparel, or an article of athletic equipment.
Aspect 240 the article of aspect 239, wherein the component used to manufacture the article of footwear, the article of apparel, or the article of athletic equipment is a cushioning element or an impact absorbing element.
Aspect 241 the article of aspect 240, wherein the component used to manufacture the article of footwear, the article of apparel, or the article of athletic equipment is a cushioning element for the article of footwear.
Aspect 242 the article of aspect 241, wherein the cushioning element for the article of footwear is a midsole, an outsole, a combined midsole-outsole unit, a sock liner, an ankle collar, or a heel cushioning pad.
The article of aspect 239, wherein the component used to manufacture the article of footwear, article of apparel, or article of athletic equipment is a preform.
Aspect 244. the article of aspect 238, wherein the article is a padded component for manufacturing a sports helmet, backpack, garment, sports uniform padding, or combat gear.
Aspect 245 the article of aspect 238, wherein the article is a component for manufacturing a tactical gear article.
Aspect 246 the article of aspect 245, wherein the tactical gear article is a bag, a backpack (packframe), a gear bag (gear bag), a chest hanging bag (chest rig), a rifle sling (rifle sling), a belt (belt), a holster (holder), a vest (vest), or a jacket.
Aspect 247 the article of aspect 245 or aspect 246, wherein the component used to manufacture the tactical gear article is a pad component.
Aspect 248 the article of aspect 238, wherein the article is a component for manufacturing an article of work safety equipment.
Aspect 249 the article of aspect 248, wherein the work safety equipment article is a safety suit, a work helmet, a work boot, or a work glove.
Aspect 250 the article of aspect 248 or aspect 249, wherein the component used to manufacture the work safety equipment article is a padded component.
Aspect 251 the article of any one of aspects 238-250, wherein the article is characterized by a plurality of sub-regions comprising a first sub-region characterized by a first property and a second sub-region characterized by a second property, wherein the first property is not equal to the second property, and wherein the first property and the second property are flexural modulus, stiffness, packing density, or elasticity.
Aspect 252 the article of aspect 251, wherein the article is characterized by a plurality of cross-sectional sub-regions including a first sub-region characterized by a first flexural modulus and a second sub-region characterized by a second flexural modulus, wherein the first flexural modulus is not equal to the second flexural modulus.
Aspect 253 the article of aspect 251, wherein the article is characterized by a plurality of cross-sectional sub-regions including a first sub-region characterized by a first bulk density and a second sub-region characterized by a second bulk density, wherein the first bulk density is not equal to the second bulk density.
The article of aspect 251, wherein the article is characterized by a plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first stiffness and a second sub-region characterized by a second stiffness, wherein the first stiffness is not equal to the second stiffness.
Aspect 255 the article of aspect 251, wherein the article is characterized by a plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first elasticity and a second sub-region characterized by a second elasticity, wherein the first elasticity is not equal to the second elasticity.
Aspect 256. an article, comprising: a structure formed from a plurality of attached foam particles; wherein each individual foam particle of the plurality of attached foam particles is formed from a thermoplastic elastomer material and includes one or more bonding regions on an outer surface of the individual foam particle that attach the individual foam particle to one or more adjacent foam particles; wherein one or more adjacent foam particles comprise a thermoplastic elastomer material; wherein the bonded region comprises a portion of the bonding material from an individual foam particle, a portion of the bonding material from at least one of one or more adjacent foam particles, a portion of the thermoplastic elastomer material from an individual foam particle mixed with a portion of the thermoplastic elastomer material from at least one of one or more adjacent foam particles, or any combination thereof; wherein a structure formed from a plurality of attached foam particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure; wherein, prior to attachment, at least 20% of the plurality of foam particles are ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and wherein at least 20% of the ellipsoidal foam particles in the structure retain a substantially ellipsoidal shape.
Aspect 257 the article of aspect 256, wherein the bonded regions comprise dissolved and re-cured thermoplastic elastomer material from individual foam particles, from at least one of one or more adjacent foam particles, or both.
Aspect 258. the article of aspect 256, wherein the bonded region comprises dissolved and resolidified binder material from individual foam particles, from at least one of one or more adjacent foam particles, or both.
Aspect 259 the article of any one of aspects 256 and 258, wherein the thermoplastic elastomer material comprises the thermoplastic elastomer of any one of aspects 115 and 190.
Aspect 260. the article of any one of aspects 256-259, wherein the foam particles are foam particles of any one of aspects 92-114.
Aspect 261 the article of any of aspects 256 and 260, wherein the article is a component for manufacturing an article of footwear, an article of apparel, or an article of athletic equipment.
Aspect 262 the article of aspect 261, wherein the component used to manufacture the article of footwear, the article of apparel, or the article of athletic equipment is a cushioning element or an impact absorbing element.
Aspect 263 the article of aspect 262, wherein the component used to manufacture the article of footwear, the article of apparel, or the article of athletic equipment is a cushioning element for the article of footwear.
Aspect 264 the article of aspect 263, wherein the cushioning element for the article of footwear is a midsole, an outsole, a combined midsole-outsole unit, a sock liner, an ankle collar, or a heel cushioning pad.
Aspect 265 the article of aspect 261, wherein the component used to manufacture the article of footwear, the article of apparel, or the article of athletic equipment is a preform.
Aspect 266. the article of any one of aspects 256 and 260, wherein the article is a padded component for manufacturing a sports helmet, backpack, garment, sports uniform padding, or combat gear.
Aspect 267. the article of any one of aspects 256 and 260, wherein the article is a component for manufacturing a tactical gear article.
Aspect 268. the article of aspect 267, wherein the tactical gear article is a bag, a backpack, a gear bag, a chest hanging bag, a rifle sling, a belt, a holster, a vest, or a jacket.
Aspect 269. the article of aspect 267 or aspect 268, wherein the component used to manufacture the tactical gear article is a pad component.
Aspect 270 the article of any one of aspects 256-260, wherein the article is a component for manufacturing a work safety equipment article.
Aspect 271. the article of aspect 270, wherein the work safety equipment article is a safety suit, a work helmet, a work boot, or a work glove.
Aspect 272. the article of aspect 270 or aspect 271, wherein the component used to manufacture the work safety equipment article is a pad component.
Aspect 273 the article according to any one of aspects 256-272, wherein the article is characterized by a plurality of sub-regions comprising a first sub-region characterized by a first property and a second sub-region characterized by a second property, wherein the first property is not equal to the second property, and wherein the first property and the second property are flexural modulus, stiffness, packing density or elasticity.
The article of aspect 273, wherein the first property is at least 10% greater than the second property.
Aspect 275 the article of aspect 273, wherein the article is characterized by a plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first flexural modulus and a second sub-region characterized by a second flexural modulus, wherein the first flexural modulus is not equal to the second flexural modulus.
Aspect 276 the article of aspect 273, wherein the article is characterized by a plurality of cross-sectional sub-regions including a first sub-region characterized by a first bulk density and a second sub-region characterized by a second bulk density, wherein the first bulk density is not equal to the second bulk density.
Aspect 277 the article of aspect 273, wherein the article is characterized by a plurality of cross-sectional sub-regions including a first sub-region characterized by a first stiffness and a second sub-region characterized by a second stiffness, wherein the first stiffness is not equal to the second stiffness.
Aspect 278 the article of aspect 273, wherein the article is characterized by a plurality of cross-sectional sub-regions comprising a first sub-region characterized by a first elasticity and a second sub-region characterized by a second elasticity, wherein the first elasticity is not equal to the second elasticity.
An aspect 279. a method of manufacturing an article of footwear, comprising: attaching an upper to a sole structure, wherein the sole structure includes a cushioning element that includes a structure formed from a plurality of attached foam particles; wherein each individual foam particle of the plurality of attached foam particles is formed from a thermoplastic elastomer material and includes one or more bonding regions on an outer surface of the individual foam particle that attach the individual foam particle to one or more adjacent foam particles; wherein one or more adjacent foam particles comprise a thermoplastic elastomer material; wherein the bonded region comprises a portion of the bonding material from an individual foam particle, a portion of the bonding material from at least one of one or more adjacent foam particles, a portion of the thermoplastic elastomer material from an individual foam particle mixed with a portion of the thermoplastic elastomer material from at least one of one or more adjacent foam particles, or any combination thereof; wherein a structure formed from a plurality of attached foam particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure; wherein, prior to attachment, at least 20% of the plurality of foam particles are ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters, and at least 20% of the ellipsoidal foam particles in the structure retain a substantially ellipsoidal shape.
Aspect 280. a method of forming an article, the method comprising: disposing a plurality of resin particles, wherein the disposed plurality of resin particles comprise a thermoplastic elastomer material, and wherein the disposed plurality of resin particles have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; depositing a binding material in a binding material target area, wherein the binding material target area includes at least a portion of the arranged plurality of resin particles, and wherein the depositing coats at least a portion of a defined surface of the arranged plurality of resin particles with the binding material; and curing the deposited bonding material coating at least a portion of the defined surfaces of the arranged plurality of resin particles within at least a bonding material target area, wherein curing comprises attaching at least a portion of the arranged plurality of resin particles to each other within the target area.
The method of aspect 280, wherein the target region further comprises a plurality of foam particles, and the curing further comprises affixing a portion of the plurality of foam particles within the target region to the plurality of resin particles.
Aspect 282. the method of aspect 281, wherein the foam particles are foam particles as described in any one of
Aspect 283 the method of any one of aspects 280-282, wherein the method further comprises the steps as recited in any one of aspects 1-279.
Aspect 284. the method of any one of aspects 280-283, wherein the thermoplastic elastomer of the resin particle is a thermoplastic elastomer according to any one of aspects 1-279.
Aspect 285. the method of any one of aspects 280-284, wherein the thermoplastic elastomer of the resin particle and the thermoplastic elastomer of the foam particle are the same.
Aspect 286. the method of any one of aspects 280-285, wherein the physical size or chemical composition or both of the resin particles is the same as the physical size or chemical composition or both as described with respect to the foam particles of any one of aspects 1-279, except that prior to curing, the resin particles are substantially free of the foaming material.
Aspect 287 an article manufactured by the method of any one of aspects 280-286.
Aspect 288 the article of aspect 287, wherein the article is an article as described in any of
Aspect 289. an article, comprising: a structure formed of a plurality of attached resin particles; wherein each individual resin particle of the plurality of attached resin particles is formed of a thermoplastic elastomer material and includes one or more bond regions on an outer surface of the individual resin particle that attach the individual resin particle to one or more adjacent resin particles; wherein one or more adjacent resin particles comprise a thermoplastic elastomer material; wherein the bonded region comprises a portion of the bonding material from an individual resin particle, a portion of the bonding material from at least one of one or more adjacent resin particles, a portion of the thermoplastic elastomer material from an individual resin particle mixed with a portion of the thermoplastic elastomer material from at least one of one or more adjacent resin particles, or any combination thereof; wherein a structure formed from the plurality of attached resin particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure; wherein, prior to attachment, at least 20% of the plurality of resin particles are spherical or ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and wherein at least 20% of the spherical or ellipsoidal resin particles in the structure retain a substantially spherical or ellipsoidal shape.
Aspect 290. an article, comprising: a structure formed of a plurality of attached resin particles; wherein each individual resin particle of the plurality of attached resin particles is formed of a thermoplastic elastomer material and includes one or more bond regions on an outer surface of the individual resin particle that attach the individual resin particle to one or more adjacent resin particles or to one or more adjacent foam particles or both; wherein one or more adjacent resin particles, one or more adjacent foam particles, or both comprise a thermoplastic elastomer material; wherein the bonded region comprises a portion of the bonding material from the individual resin particles, a portion of the bonding material from at least one of the one or more adjacent foam particles, a portion of the thermoplastic elastomer material from the individual resin particles mixed with a portion of the thermoplastic elastomer material from at least one of the one or more adjacent resin particles or from at least one of the one or more adjacent foam particles, or any combination thereof; wherein a structure formed from the plurality of attached resin particles comprises a plurality of interstices between the particles, wherein the interstices occupy at least 10% of the total volume of the structure; wherein, prior to attachment, at least 20% of the plurality of resin particles are spherical or ellipsoidal in shape and have a number average particle size in the longest dimension of about 0.04 millimeters to about 10 millimeters; and wherein at least 20% of the spherical or ellipsoidal resin particles in the structure retain a substantially spherical or ellipsoidal shape.
Aspect 291. a method of making an article, comprising: attaching a first member and a second member to one another, wherein the first member comprises an article comprising a plurality of attached resin particles or foam particles, or both, according to any of aspects 238-278 or 287-290.
From the foregoing, it will be seen that the aspects herein are well adapted to attain all the ends and objects set forth above, together with other advantages which are obvious and which are inherent to the structure.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
As many possible aspects may be made without departing from the scope herein, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.
Although specific elements and steps are discussed in conjunction with each other, it should be understood that any element and/or step provided herein is contemplated as being combinable with any other element and/or step, whether explicitly stated or not, while remaining within the scope provided herein. As many possible aspects may be made of the disclosure without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.
Examples
Having now described aspects of the present disclosure, the following examples, in general, describe some additional aspects of the present disclosure. While aspects of the disclosure are described in connection with the following embodiments and the corresponding text and drawings, there is no intent to limit aspects of the disclosure to this description. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the disclosure.
Preparation and characterization of foam particles.
Foam particles (referred to herein as "thermoplastic COPE foam particles") are prepared using a thermoplastic block copolyester comprising crystalline (or hard) segments comprising polybutylene terephthalate and amorphous (or soft) segments comprising a polyether. The foam particles are prepared to have a nominal diameter of 1 mm or 2 mm. Thermoplastic polyolefin block copolymers are also used to prepare foam pellets (referred to herein as "TPO foam pellets"). Briefly, foam particles are prepared using a physical blowing agent (e.g., a supercritical fluid such as supercritical carbon dioxide or supercritical nitrogen) in an extrusion process that includes a MUCELL process (Trexel, inc., Wilmington, massachussettes) used in combination with an underwater pelletizer having a die plate with a circular opening (1 mm or 2 mm as desired) of appropriately sized dimensions and a cutting blade configured to provide particles of the desired size.
Differential scanning calorimetry ("DSC") was performed on a representative sample (9 mg) of thermoplastic COPE foam particles, and the scanning data are shown in fig. 11. The data show that thermoplastic COPE foam particles are characterized by three glass transition temperatures and a broad melting profile. Melting onset (melt onset) starts at about 120.54 degrees celsius, has a peak at 152.0 degrees celsius, and an overall melting range from about 120 degrees celsius to about 180 degrees celsius. In a separate study, a representative sample of TPO foam pellets (4.89 mg) was characterized using DSC. These particles are characterized by a sharp melting peak at 122.73 degrees celsius, with the melting range being from about 105 degrees celsius to about 130 degrees celsius. No significant glass transition temperature transition was observed for the TPO foam pellets.
Samples of thermoplastic COPE foam particles and TPO foam particles were analyzed for particle size distribution and roundness. Analysis was performed using a Microtrac Particle Analyzer 3D machine to count at least 2000 particles for each sample analysis. The data for the analyzed thermoplastic COPE foam particle samples are shown in fig. 12 (particle size distribution) and fig. 13 (roundness distribution). The data obtained for the two types of samples analyzed are shown in table I below.
Table I.
A representative batch of thermoplastic COPE foam particles (1 mm nominal diameter) was determined to have a bulk density of about 130 grams per liter using standard methods.
Exemplary data for articles prepared using foam particles.
Using the foam particles described above, articles were prepared using a selective laser sintering instrument (Sinterstation Vanguard manufactured by Integra, LLC, RoundRock, Texas) to heat and fuse (i.e., sinter) the foam particles. The instrument was modified to allow the roller to accommodate foam particles of 1-2 mm diameter while forming the layer. The instrument was set to 2 seconds after addition for the foam particles or control powder, 7 seconds before addition for the foam particles or control powder, and 10 seconds for the minimum layer time (layer time). Heating and laser sintering of the foam particles was performed under an inert atmosphere using radiant heating of the chamber provided by a top heat lamp. The foam particles used were thermoplastic COPE foam particles of 1 mm or 2 mm nominal diameter. A control article was prepared using a non-foamed thermoplastic polyurethane elastomer powder (TPU-70A, Prodways Group, Les Mureaux, France; thermoplastic polyurethane powder; particle size D90, 88 microns; Density, Nature (20 degrees Celsius), 1020-.
The time of exposure was determined using a cross-sectional file slice (filescale) with an XY scan area of 101.6 mm x 76.2 mm as follows:
table II.
An infrared laser beam (wavelength of 10.53-10.63 microns) having a beam width of about 0.3 mm to about 0.4 mm is used. The scanning rate of the laser beam was set at 12,500 mm per second. The laser beam overlap fraction (fractional overlap) is 0.3 (i.e., the laser beam position is shifted, which overlaps 0.3 with the adjacent beam path). A laser power output of 48 watts (for the control TPU powder) or 55 watts (elastomer COPE foam particles) was used.
The scan pattern is defined using 3D CAD files, which are then mathematically segmented into 2D cross-sections to define the scan pattern for each layer. In some cases, the scan pattern is performed more than one iteration (or exposure), as indicated below.
The density of the whole article was determined using a GT-7190Densicom tester (gotechesting Machines, inc., taizhou city, taiwan, china) using a standard water displacement method.
The data are given in table III, table IV and table V below. The data shown in the table are: (a) articles prepared using 1 mm thermoplastic COPE foam particles compared to the control material, with density as a function of the number of iterations of laser heating (table III); and (b) articles prepared using 2 mm thermoplastic COPE foam particles compared to the control material, wherein the density is a function of the number of iterations of laser heating (table IV and table V). Articles prepared using the COPE foam particles were characterized by the desired level of sintering. Articles prepared using the COPE foam particles were characterized by a desirable level of sintering; after visual inspection it was confirmed that the foam particles were fully sintered and had no significant wall structure. The control TPU powder indicated in the table is the non-foamed thermoplastic polyurethane elastomer powder mentioned above (Prodways TPU-70A). The elasticity data were obtained according to ASTM D-2632.
The data in table III surprisingly shows that the articles prepared by the methods described herein maintain a very low density of about 0.362 grams per cubic centimeter to about 0.475 grams per cubic centimeter when exposed to multiple passes of IR laser energy at 55 watts when performed using 1 millimeter foam particles. In contrast, TPU powder exposed to only a single iteration or pass of IR laser energy at 48 watts produces an article with up to 2.0 to 2.6 times greater density (about 0.945 grams per cubic centimeter).
The data in table IV surprisingly shows that the articles prepared by the process described herein maintain a very low density of about 0.336 grams per cubic centimeter to about 0.425 grams per cubic centimeter when exposed to multiple passes of IR laser energy at 55 watts when performed using 2 millimeter foam particles. In contrast, only a single iteration or pass of the TPU powder exposed to IR laser energy at 48 watts produces an article with a density as high as 2.4 to 2.7 times greater (about 1.005 grams per cubic centimeter). Furthermore, a comparable level of elasticity was observed for articles made using the foam particles by the process described herein compared to control articles made using a single pass of TPU powder exposed to IR laser energy.
The data in table V surprisingly shows that the articles prepared by the methods described herein maintain a very low density of about 0.338 grams per cubic centimeter to about 0.397 grams per cubic centimeter when exposed to multiple passes of IR laser energy at 55 watts when performed using 2 millimeter foam particles. In contrast, TPU powders exposed to only a single iteration or pass of IR laser energy at 48 watts yield articles with up to 2.4 to 2.9 times greater density (about 0.971 grams per cubic centimeter). Furthermore, a comparable level of elasticity was observed for articles made using the foam particles by the process described herein compared to control articles made using a single pass of TPU powder exposed to IR laser energy. Thus, the disclosed method can provide highly elastic articles that maintain very low densities despite multiple exposures or passes of an energy source, such as an IR laser beam.
Table III.
"nd" — not determined.
Table IV.
Table V.
The data shows that the density of articles prepared using foam particles increases with the number of iterations or exposures of the laser beam. Furthermore, the density of the articles made using the foamed particles is significantly less than the density of articles made using the TPU non-foamed powder.
Exemplary article
Exemplary articles were manufactured using the methods and materials disclosed above (see fig. 14-16). Fig. 14 shows an article comprising thermoplastic COPE foam particles that have been provided in a series of layers that are sintered in a manner that creates four solid pier structures (solid pier structures) that are elevated from the surface of the foam particles having a central cavity with highly sintered edges. Fig. 15 and 16 show an article of footwear outsole containing thermoplastic COPE foam particles. The outsole in fig. 15 is shown immediately after production on the sintering station and surrounded by loose, unsintered foam particles with the outsole in place. After removing the unsintered foam particles, a clean outsole is shown in FIG. 16.
It should be emphasized that the above-described aspects of the present disclosure are merely possible examples of implementations, merely set forth for a clear understanding of the principles of the disclosure. Many variations and modifications may be made to the above-described aspects of the disclosure without departing substantially from the spirit and principles of the disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure.
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