阅读说明：本技术 一种功能性再生尼龙6纤维、其制备方法及面料 (Functional regenerated nylon 6 fiber, preparation method thereof and fabric ) 是由 张伟强 曾国坪 王志勇 于 2020-06-16 设计创作，主要内容包括：本发明涉及再生尼龙纤维技术领域,本发明提供了一种功能性再生尼龙6纤维、其制备方法及面料,所述功能性再生尼龙6纤维由尼龙6废料依次经过前处理、再生造粒和纺丝制得；所述功能性再生尼龙6纤维具有扁平一字型截面。本发明纤维采用尼龙废料制成,具有环保性。并且,本发明所述的再生尼龙6纤维的异型截面结构,可以改变纤维表面与水分子的接触形式,从而对最终面料在持续凉感穿着体验的性能上改变提升,利于推广应用。此外,本发明还可在该纤维内部添加氧化锌,使纤维具备抗菌功能。同时,本发明还可添加用于溯源的追踪元素-钡元素,更有利于材料从纤维到最终服装成品上的溯源追踪管控。(The invention relates to the technical field of regenerated nylon fibers, and provides a functional regenerated nylon 6 fiber, a preparation method thereof and a fabric, wherein the functional regenerated nylon 6 fiber is prepared by sequentially carrying out pretreatment, regeneration granulation and spinning on nylon 6 waste; the functional regenerated nylon 6 fiber has a flat straight section. The fiber is made of nylon waste, and has environmental protection. In addition, the special-shaped cross section structure of the regenerated nylon 6 fiber can change the contact form of the fiber surface and water molecules, so that the performance of the final fabric in the wearing experience of continuous cool feeling is changed and improved, and the popularization and the application are facilitated. In addition, the invention can add zinc oxide into the fiber, so that the fiber has an antibacterial function. Meanwhile, the invention can also add a tracing element-barium element for tracing, which is more beneficial to tracing and controlling the material from the fiber to the final clothing finished product.)

1. A functional regenerated nylon 6 fiber is characterized in that the functional regenerated nylon 6 fiber is prepared by sequentially carrying out pretreatment, regeneration granulation and spinning on nylon 6 waste; the functional regenerated nylon 6 fiber has a flat straight section.

2. The functional regenerated nylon 6 fiber according to claim 1, characterized in that the functional regenerated nylon 6 fiber further contains zinc oxide.

3. The functional regenerated nylon 6 fiber according to any one of claims 1 to 2, characterized in that the functional regenerated nylon 6 fiber further contains barium element.

4. A preparation method of functional regenerated nylon 6 fibers comprises the following steps:

carrying out regeneration granulation on nylon 6 waste after pretreatment to obtain regenerated nylon particles;

and optionally mixing the regenerated nylon particles with additives, and then carrying out melt spinning, wherein a flat linear spinneret plate is adopted in the melt spinning process to obtain the functional regenerated nylon 6 fiber.

5. The preparation method according to claim 4, wherein the pre-treatment specifically comprises: sequentially crushing, cleaning and drying; the regeneration granulation is cooling and granulating after melt extrusion.

6. The method as claimed in claim 5, wherein the temperature of the melting process of the regeneration granulation is controlled in sections, and the temperature of each section is between 225 ℃ and 235 ℃.

7. The production method according to claim 4, wherein the additive is selected from one or more of zinc oxide and barium sulfate; the additive is used in an amount of not more than 0.6 wt% based on the weight of the regenerated nylon particles.

8. The method as claimed in claim 4, wherein the temperature of the melt spinning is 270-280 ℃.

9. The method of claim 4, wherein the flat linear spinneret has a flattening ratio of 20 to 30%.

10. A fabric comprising the functional regenerated nylon 6 fiber according to any one of claims 1 to 3.

Technical Field

The invention relates to the technical field of regenerated nylon fibers, in particular to a functional regenerated nylon 6 fiber, a preparation method thereof and a fabric.

Background

The nylon material is widely applied to the fields of clothes, automobiles, fishing gear, building materials and the like, is related to people's daily life chiffon, and therefore a large amount of waste nylon materials are generated. Meanwhile, the raw materials for synthesizing nylon are generally from non-renewable petroleum resources, and with the gradual depletion of petroleum resources and the enhancement of global environmental awareness, people begin to invest in the research of various renewable nylon technologies.

The regenerated nylon is mainly prepared by recycling waste nylon materials such as waste fishing nets, waste carpets and the like, performing physical and chemical treatment, depolymerizing, removing impurities and polymerizing to obtain the applicable nylon material. In the aspect of regenerated nylon fiber, regenerated nylon fiber from more manufacturers is sold in the market currently, and the main product is generally regenerated nylon 6 fiber and is also applied to textile shoes and clothes.

The regenerated nylon has no obvious difference from the original nylon in material performance. However, in terms of material cost, the regenerated nylon fiber provided in the market has a much higher cost than the virgin nylon fiber due to various factors such as GRS certification. In addition, the existing regenerated nylon fiber is applied, other additional wearing experiences are difficult to be produced for the consumer, and the large-area popularization and application of the shoe and clothing manufacturing end are difficult to be realized.

Disclosure of Invention

In view of this, the present application provides a functional regenerated nylon 6 fiber, a preparation method thereof, and a fabric, and the functional regenerated nylon 6 fiber provided by the present application has specific additional functions such as a cool feeling, and is beneficial to environmental protection and can bring additional wearing experience to consumers.

The invention provides a functional regenerated nylon 6 fiber, which is prepared by sequentially carrying out pretreatment, regeneration granulation and spinning on nylon 6 waste; the functional regenerated nylon 6 fiber has a flat straight section.

Preferably, the functional regenerated nylon 6 fiber also contains zinc oxide.

Preferably, the functional regenerated nylon 6 fiber also contains barium element.

The invention provides a preparation method of functional regenerated nylon 6 fibers, which comprises the following steps:

carrying out regeneration granulation on nylon 6 waste after pretreatment to obtain regenerated nylon particles;

and optionally mixing the regenerated nylon particles with additives, and then carrying out melt spinning, wherein a flat linear spinneret plate is adopted in the melt spinning process to obtain the functional regenerated nylon 6 fiber.

Preferably, the pretreatment specifically includes: sequentially crushing, cleaning and drying; the regeneration granulation is cooling and granulating after melt extrusion.

Preferably, the temperature of the melting process of the regeneration granulation is controlled in sections, and the temperature of each section is between 225 ℃ and 235 ℃. The invention further preferably adopts a 5-section zone temperature control process to ensure the uniformity of the melt in the granulation process of the regenerated nylon and ensure the quality of the raw materials.

Preferably, the additive is selected from one or more of zinc oxide and barium sulfate; the additive is used in an amount of not more than 0.6 wt% based on the weight of the regenerated nylon particles.

Preferably, the temperature of the melt spinning is 270-. The invention preferably adopts the spinning temperature of 270-280 ℃ to obtain the balance point of the fiber flatness and the end breakage rate.

Preferably, the flat linear spinneret plate has a flat rate of 20% -30%.

The invention provides a fabric, which comprises the functional regenerated nylon 6 fiber.

Compared with the prior art, the functional regenerated nylon 6 fiber is prepared by mainly carrying out regeneration granulation and spinning on nylon 6 waste and has a flat linear section. The fiber is made of nylon waste, and has environmental protection. In addition, the special-shaped cross section structure of the regenerated nylon 6 fiber can change the contact form of the fiber surface and water molecules, so that the performance of the final fabric in the wearing experience of continuous cool feeling is changed and improved, and the popularization and the application are facilitated.

In addition, zinc oxide can be added into the fiber, so that the fiber has an antibacterial function, becomes a multifunctional fiber material, and further creates a product with additional experience value for a consumer end, thereby improving the enthusiasm of the consumer end for participating in environmental protection.

Meanwhile, the invention can also add a tracing element-barium element for tracing, which is more favorable for tracing, tracing and controlling the material from the fiber to the final clothing finished product under the condition of not influencing the performance of the fiber material.

Drawings

FIG. 1 is a cross-sectional view of a regenerated nylon 6 fiber prepared according to one embodiment of the present invention;

FIG. 2 is a cross-sectional view of a regenerated nylon 6 fiber prepared in example two of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a functional regenerated nylon 6 fiber, which is prepared by sequentially carrying out pretreatment, regeneration granulation and spinning on nylon 6 waste; the functional regenerated nylon 6 fiber has a flat straight section.

The functional regenerated nylon 6 fiber provided by the application has specific additional functions such as cool feeling, is beneficial to environmental protection, and can bring additional wearing experience for consumers.

The functional regenerated nylon 6 fiber is prepared from nylon 6 waste, and has the concept or attribute of regeneration and environmental protection. The nylon 6 waste comprises leftover materials and waste materials in the production process of nylon, and the performance parameters and the like of the waste materials are slightly lower than those of the original nylon 6. Nylon 6 is polyamide 6, also called PA6 or nylon 6. The spinning temperature range of the conventional nylon 6 is large, and is generally 240-290 ℃.

In the invention, the cross section of the functional regenerated nylon 6 fiber is flat and linear, which is different from the conventional round special-shaped cross section structure, not only has spinnability, but also can change the contact form of the fiber surface and water molecules, thereby improving or promoting the cool feeling performance of the fiber and the final fabric and leading a wearer to have cool feeling; while other special-shaped sections are difficult to achieve the good effect.

In the embodiment of the invention, the functional regenerated nylon 6 fiber also contains a small amount of zinc oxide, so that the cool feeling of the fiber is improved, and the fiber also has an antibacterial function.

Preferably, the functional regenerated nylon 6 fiber further contains barium element, and can be obtained by adding a small amount of barium sulfate during spinning. The regenerated nylon 6 fiber provided by the embodiment of the invention contains barium element in a certain proportion, and can be used for tracing raw materials, so that the tracing from the fiber to the final clothing finished product is realized, and the management and control of the raw materials are facilitated. In the embodiment of the invention, the tracing process is to add barium sulfate into the nylon 6 recycled raw material, so that the content of barium on the yarn, the fabric and the ready-made clothes can be tested by a metal element content testing method in the whole process from the yarn to the ready-made clothes, and the application of the batch of recycled nylon is monitored, so as to prevent the condition of material reduction due to work stealing under the condition of high cost.

The functional regenerated nylon 6 fiber of the present invention is generally a filament, and may be POY (pre-oriented yarn), DTY (draw textured yarn), etc., and the present invention is not particularly limited to the size and the like thereof.

The embodiment of the invention provides a preparation method of functional regenerated nylon 6 fibers, which comprises the following steps:

carrying out regeneration granulation on nylon 6 waste after pretreatment to obtain regenerated nylon particles;

and optionally mixing the regenerated nylon particles with additives, and then carrying out melt spinning, wherein a flat linear spinneret plate is adopted in the melt spinning process to obtain the functional regenerated nylon 6 fiber.

The embodiment of the invention firstly carries out regeneration granulation on the recycled nylon waste, and the process route is as follows: collecting nylon waste, crushing, cleaning, drying, extruding by a granulator, cooling, granulating and pelletizing.

Wherein, the nylon waste material mainly adopts leftover bits and pieces and waste materials in the production process of nylon 6. The invention can adopt a crusher to crush (or called as crushing) the collected nylon waste, and the discharged material is fragments of 2cm-3cm generally. The cleaning-drying pretreatment process specifically comprises the following steps: the embodiment of the invention cleans the fragments in a primary washing tank to remove most of impurities such as dust, silt and the like doped in the waste, mixes the impurities in a stirrer, and then enters a centrifuge for dehydration after primary cleaning and secondary cleaning, and then enters a dryer for drying at the drying temperature of 80-90 ℃.

After the pretreatment is completed, the embodiment of the invention carries out re-granulation: the dried chips can be fed into a twin-screw wire drawing machine (for example, screw diameter of 35mm and length-diameter ratio of 36: 1) from the feed inlet of a granulator, and then melt-extruded. Preferably, the temperature control of the melting process is divided into 5 sections, wherein the temperature of each section is 225 ℃ plus 235 ℃, and the screw rotating speed is 100 plus 130 r/min. The invention preferably controls the regeneration granulation melting process in a subsection mode, and sets a precise temperature area so as to reduce the reduction of the viscosity of the melt and keep the uniformity of the melt conveying. The invention can extrude the molten nylon waste material through the head of the wire drawing machine to form a nylon wire shape, preferably controls the extrusion temperature to 210 ℃ and 220 ℃, and the pressure of the head of the wire drawing machine can be 0.2MPa-0.3 MPa. Finally, the formed nylon filaments are cooled by a cold water tank and then enter a granulator to be cut into particles, the rotating speed of the granulator can be 150r/min, and the particle size is generally 4-8 mm.

The embodiment of the invention takes the obtained regenerated nylon particles, preferably adds the regenerated nylon particles and a small amount of additives into high-speed spinning equipment together, and carries out melt spinning.

In addition to the property of the renewable environmental protection concept of the raw materials, the embodiment of the invention can add other materials to enable the fiber to have additional functionality, and can create additional wearing experience for consumers. In the present invention, the additive is preferably selected from one or more of zinc oxide and barium sulfate, and more preferably both are added simultaneously. Specifically, the additive is used in an amount of not more than 0.6 wt% based on the weight of the regenerated nylon particles; in the embodiment of the present invention, the additive may include 0.5 wt% of zinc oxide and 0.1 wt% of high gloss barium sulfate, based on the weight of the added regenerated nylon particles. Wherein, the zinc oxide is an antibacterial additive, and the barium sulfate is used as a tracing element for tracing. The source of the additive is not particularly limited, and a commercially available product can be used. Illustratively, zinc oxide: zinc oxide content > 98.6%, particle size 20-40nm, jin Dai nanometer technology (Xiamen) Co Ltd; highlight barium sulfate: the content of barium sulfate is more than or equal to 98 percent, 6000 meshes, Shanghai Yangjiang chemical industry Co.

In some embodiments of the present application, the melt spinning comprises the process sequence (r): screw extruder, prefilter, mixer, metering pump, spinning assembly, spinning, cross-air blowing oiling, channel, POY winding yarn; wherein: the spinneret plate is a flat linear special-shaped hole spinneret plate; the melt spinning temperature is preferably 270-280 ℃.

In the embodiment of the invention, the spinning process is controlled at 280 ℃ of 270 ℃, so that the rheological property of the melt can be maintained, the flatness is increased, and the breakage rate of spinning cannot be increased. The low temperature is favorable for improving the flatness, but the end breakage rate can be increased, and the too high flatness is easy to cause the fiber tip effect in the later fabric dyeing process, namely, dye molecules are gathered at two sides of the flat structure to cause the fabric to have stripe flaws. Therefore, the flatness of the embodiment of the present invention also needs a proper degree, and the flatness ratio is preferably 20% to 30%. The flattening ratio, i.e., the cross-sectional height/cross-sectional width × 100%, indicates the degree of flattening.

Further illustratively, the melt spinning process may further include the following conditions: wind speed of 0.4-0.6m/s, wind temperature of 25-30 deg.C, and relative humidity of 60-70%; the oiling rate is preferably 1.0-1.6%; the spinning speed is preferably 4000-4500 m/min.

In some embodiments of the present application, the melt spinning comprises process step (ii): thread guide-feed roller-first hot box-cooling plate-false twister-output roller-oiling-DTY winding thread. Wherein: the temperature of the hot box is preferably 160-180 ℃; the cooling temperature may be: 80-90 ℃; D/Y ratio: 1.0-1.5; the draft ratio is preferably 1.20 to 1.30; the oiling rate is preferably 1.5-2.0%. D/Y ratio: the ratio of the surface speed of the friction disc to the speed of the threadline exiting the false twister. The larger the D/Y ratio is, the twisting tension is greater than the untwisting tension, the cohesion between the fibers is tighter, the smaller the D/Y ratio is, the twisting tension is less than the untwisting tension, and the fibers are looser.

The functional regenerated nylon 6 fiber obtained by spinning can be POY (partially oriented yarn) winding yarn and also can be DTY (draw textured yarn) winding yarn. According to the embodiment of the invention, the specific material is added to participate in polymerization in the spinning process, and the flat linear special-shaped hole spinneret plate is adopted in the subsequent process, so that the prepared regenerated nylon fiber has a special-shaped section different from a conventional round shape, and the cool feeling performance of the final fabric can be improved. Meanwhile, the added characteristic materials also enable the fiber to have specific additional functions, such as an antibacterial function and the like; and the added tracking elements are beneficial to the source tracking control of the material from the fiber to the final garment finished product.

The invention also provides a fabric which comprises the functional regenerated nylon 6 fiber. The fabric can be a pure spinning fabric or a blended fabric, can be any fabric weave structure of knitting or tatting, and is not particularly limited in the application.

For further understanding of the present application, the functional regenerated nylon 6 fiber provided by the present application, the preparation method thereof and the fabric are specifically described below with reference to examples.

In the following examples, all materials are commercially available. The nylon waste materials used in the invention are mainly leftover materials and waste silk materials generated in the production flow of nylon products, and are various and have no specific size, appearance and material performance; for example: the waste silk may come from inferior-quality products with substandard performance caused by the unqualified process control in the spinning process, or may come from materials with substandard material performance but polluted by the operation problem of the working procedure. In addition, the leftover materials can be the rest materials of all the working procedures in the production process, some are granular materials, and some are filiform materials.