阅读说明：本技术 一种模内发泡用发泡母粒及其制造方法 (Foaming master batch for in-mold foaming and manufacturing method thereof ) 是由 周芳如 尤利春 尤淳永 熊汉兴 于 2018-07-17 设计创作，主要内容包括：本发明为一种模内发泡用发泡母粒及其制造方法,该发泡母粒具有多个发泡区域,每一个该发泡区域的该发泡母粒通过电子束照射并具有架桥程度,每一个该发泡区域的该发泡母粒的该架桥程度均不同。每一个该发泡区域的该发泡母粒的该架桥程度不同,其主要通过控制对每一个该发泡区域的该发泡母粒照射的电子束的照射剂量及照射深度不同。本发明的该发泡母粒发泡后,每一个发泡区域因架桥程度不同而具有不同弹性及缓冲程度。(The invention relates to a foaming master batch for in-mold foaming and a manufacturing method thereof. The bridging degree of the foaming master batch in each foaming area is different, and the irradiation dose and the irradiation depth of the electron beam irradiated on the foaming master batch in each foaming area are different mainly by controlling. After the foaming master batch disclosed by the invention is foamed, each foaming area has different elasticity and buffering degree due to different bridging degrees.)

1. The foaming master batch for in-mold foaming is characterized by comprising a plurality of foaming areas, wherein the foaming master batch of each foaming area is irradiated by electron beams and has bridging degrees, and the bridging degrees of the foaming master batch of each foaming area are different.

2. The foaming mother particle for in-mold foaming according to claim 1, wherein the plurality of foaming regions include a first foaming region and a second foaming region, the first foaming region covers the second foaming region, the foaming mother particle in the first foaming region has a first bridging degree, the foaming mother particle in the second foaming region has a second bridging degree, and the first bridging degree is different from the second bridging degree.

3. The foaming mother particle for in-mold foaming according to claim 1, wherein the plurality of foaming regions include a first foaming region and a second foaming region, the first foaming region is located on one side of the second foaming region, the foaming mother particle of the first foaming region has a first bridging degree, the foaming mother particle of the second foaming region has a second bridging degree, and the first bridging degree is different from the second bridging degree.

4. The foaming master batch for in-mold foaming according to claim 3, wherein the foaming master batch comprises a first foaming plate body and a second foaming plate body, the first foaming plate body is arranged on the second foaming plate body, the first foaming plate body is the first foaming area, the second foaming plate body is the second foaming area, and the foaming material of the first foaming plate body is different from the foaming material of the second foaming plate body.

5. The foaming mother particle for in-mold foaming according to claim 2 or 3, wherein the foaming mother particle is a sphere, a plate or a strip.

6. The foaming masterbatch pellet as claimed in claim 1, wherein the foaming masterbatch pellet comprises a foaming material and a foaming agent.

7. The foaming master batch for in-mold foaming according to claim 4 or 6, wherein the foaming material comprises ethylene propylene diene monomer, polyolefin plastic, ethylene vinyl acetate copolymer and chlorinated polyethylene.

8. The foaming concentrate for in-mold foaming according to claim 6, wherein the foaming agent is selected from the group consisting of azodicarbonamide (ADCA), 4 '-oxybis-benzenesulfonylhydrazide (OBSH), N' -Dinitrosopentamethylenetetramine (DPT), Dinitrosopentamethylenetetramine (DNPT) and sodium bicarbonate (NaHCO)₃) One of them.

9. The method for producing the foaming concentrate of claim 1, comprising the steps of:

mixing a foaming material and a foaming agent as intermediates;

pressing the intermediate into at least one foaming master batch; and

irradiating each foaming area of each foaming master batch by using an electron beam emitted by an electron beam irradiation device;

the irradiation dose and the irradiation depth of the electron beam irradiating the foaming master batch in each foaming area are different, and the bridging degree of the foaming master batch in each foaming area is different.

10. The method of claim 9, wherein the foaming material comprises ethylene propylene diene monomer, polyolefin plastic, ethylene vinyl acetate copolymer, and chlorinated polyethylene.

11. The method for manufacturing the foaming masterbatch according to claim 10, wherein the composition ratio of the ethylene propylene diene monomer, the polyolefin plastic, the ethylene vinyl acetate copolymer, the chlorinated polyethylene and the foaming agent is between 0% and 100%.

12. The method for producing the foaming concentrate according to claim 9, wherein the foaming agent is selected from the group consisting of azodicarbonamide (ADCA), 4 '-oxybis-benzenesulfonylhydrazide (OBSH), N' -Dinitrosopentamethylenetetramine (DPT), Dinitrosopentamethylenetetramine (DNPT), and sodium bicarbonate (NaHCO)₃) One of them.

13. The method for producing the foaming masterbatch according to claim 9, wherein the irradiation dose of the electron beam is between 200kv and 3000 kv.

14. The method of claim 9, wherein the step of mixing the foaming material and the foaming agent as the intermediate includes heating the intermediate at a temperature between 60 ℃ and 200 ℃.

Technical Field

The invention relates to a foaming master batch and a manufacturing method thereof, in particular to a foaming master batch for in-mold foaming and a manufacturing method thereof.

Background

The foaming material is made by using different polymers as base materials and forming numerous tiny air holes in the base materials by using proper foaming agents and catalysts, and the foaming material has various types, can be classified according to foaming multiplying power, hardness and foaming structures, and is respectively suitable for different industrial products.

Wherein, the soft foaming material is made by cross-linking and foaming plastic (such as PE, EVA) and rubber (such as SBR, CR), etc., and forming a large amount of air holes in the plastic and rubber, and can be divided into closed air holes (closed cells) and open air holes (open cells) according to the air hole distribution mode; if the pores and pores are connected, it is called open-cell foam, and if the pores and pores are isolated, it is called closed-cell foam. The open-cell type foaming material has better water absorption, air permeability and sound absorption, and the closed-cell type foaming material has better heat insulation, specific strength and rebound elasticity. Because the soft foaming material has the characteristics, the soft foaming material can be used as a sealing gasket, a waterproof adhesive tape, an insulating material and the like, can be widely applied to industries such as electronics, household appliances, automobiles, sports and leisure, is closely related to civil activities, is an indispensable material in industry, and has different thicknesses of the foaming materials required by different industrial products.

The foaming process is established in the initial stage, before foaming, a cross-linking agent is added to perform a bridging reaction, heating and foaming are performed, and then processing and forming are performed. The common cross-linking agent is organic peroxide, which is toxic and costly, and the foaming materials with different mixing ratios are suitable for cross-linking agents with different components, and it takes time and cost to test, which not only causes health hazard to operators, but also causes environmental hazard. With the rising awareness of environmental protection, the industry is dedicated to develop alternative ways of crosslinking agents, wherein one way is to substitute the crosslinking agent by electron beam irradiation for the bridging reaction, thereby eliminating the harm of organic chemical substances, reducing the manufacturing cost of adding the crosslinking agent, and shortening the testing time of the bridging reaction conditions; the electron beam irradiation is used to perform the bridging reaction, so that the molecules are mutually cross-linked to form a net structure, thereby improving the physical properties of the foaming material and having better foaming uniformity.

The foaming master batches used for in-mold foaming at present are all crosslinked by using a chemical crosslinking agent, the chemical crosslinking agent enables the foaming master batches to have toxicity and higher cost, the health of a user is harmed, the environmental pollution is caused, and the foaming uniformity of the foaming master batches crosslinked by using the chemical crosslinking agent is poor. The foaming master batch crosslinked by the chemical crosslinking agent only has single bridging degree, and the elasticity and the buffering degree of a finished product after foaming are single.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a foaming master batch for in-mold foaming and a manufacturing method thereof.

In order to solve the above technical problems, the present invention discloses a foaming master batch for in-mold foaming and a manufacturing method thereof, wherein the foaming master batch has a plurality of foaming regions, the foaming master batch of each foaming region is irradiated by an electron beam and has a bridging degree, and the bridging degree of the foaming master batch of each foaming region is different.

According to an embodiment of the present invention, the foaming regions include a first foaming region and a second foaming region, the first foaming region covers the second foaming region, the foaming mother particles of the first foaming region have a first bridging degree, the foaming mother particles of the second foaming region have a second bridging degree, and the first bridging degree is different from the second bridging degree.

According to an embodiment of the present invention, the plurality of foaming regions includes a first foaming region and a second foaming region, the first foaming region is located at one side of the second foaming region, the foaming mother particles of the first foaming region have a first bridging degree, the foaming mother particles of the second foaming region have a second bridging degree, and the first bridging degree is different from the second bridging degree.

According to an embodiment of the present invention, the foaming master batch includes a first foaming plate and a second foaming plate, the first foaming plate is disposed on the second foaming plate, the first foaming plate is the first foaming area, the second foaming plate is the second foaming area, and a foaming material of the first foaming plate is different from a foaming material of the second foaming plate.

According to an embodiment of the present invention, the foaming mother particles are spheres, plates or strips.

According to an embodiment of the present invention, the foaming mother particle includes a foaming material and a foaming agent.

According to an embodiment of the present invention, the foaming material includes ethylene propylene diene monomer, polyolefin plastic, ethylene vinyl acetate copolymer, and chlorinated polyethylene.

According to one embodiment of the present invention, the foaming agent is selected from the group consisting of azodicarbonamide (ADCA), 4 '-oxybis-benzenesulfonylhydrazide (OBSH), N' -Dinitrosopentamethylenetetramine (DPT), Dinitrosopentamethylenetetramine (DNPT) and sodium bicarbonate (NaHCO)₃) One of them.

The invention also provides a manufacturing method of the foaming master batch, which comprises the following steps: mixing a foaming material and a foaming agent as intermediates; pressing the intermediate into at least one foaming master batch; irradiating each foaming area of each foaming master batch by using the electron beams emitted by the electron beam irradiation device; the irradiation dose and the irradiation depth of the electron beam irradiating the foaming master batch of each foaming area are different, and the bridging degree of the foaming master batch of each foaming area is different.

According to an embodiment of the present invention, the foaming material includes ethylene propylene diene monomer, polyolefin plastic, ethylene vinyl acetate copolymer, and chlorinated polyethylene.

According to an embodiment of the present invention, the composition ratio of the epdm, the polyolefin plastic, the eva copolymer, the chlorinated polyethylene and the foaming agent is between 0% and 100%.

According to one embodiment of the present invention, the foaming agent is selected from the group consisting of azodicarbonamide (ADCA), 4 '-oxybis-benzenesulfonylhydrazide (OBSH), N' -Dinitrosopentamethylenetetramine (DPT), Dinitrosopentamethylenetetramine (DNPT) and sodium bicarbonate (NaHCO)₃) One of them.

According to an embodiment of the present invention, the irradiation dose of the electron beam is between 200kv and 3000 kv.

According to an embodiment of the present invention, the step of mixing the foaming material and the foaming agent as the intermediate includes heating the intermediate at a temperature between 60 ℃ and 200 ℃.

Compared with the prior art, the invention can obtain the following technical effects:

the invention discloses a foaming master batch for in-mold foaming and a manufacturing method thereof.

Drawings

FIG. 1: which is a schematic view of the foamed masterbatch of the first embodiment of the present invention.

FIG. 2: which is a manufacturing flow chart of the foaming master batch of the first embodiment of the invention.

FIG. 3: which is a schematic view of an electron beam irradiation apparatus according to a first embodiment of the present invention.

FIG. 4: which is a schematic view of the foamed masterbatch of the second embodiment of the present invention.

FIG. 5: which is a manufacturing flow chart of the foaming master batch of the second embodiment of the invention.

FIG. 6: which is a schematic view of an electron beam irradiation apparatus according to a second embodiment of the present invention.

FIG. 7: which is a schematic view of the foamed masterbatch of the third embodiment of the present invention.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the application. That is, in some embodiments of the present application, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

The terms "first," "second," and the like, as used herein, do not denote any order or importance, nor do they denote any order or importance, but rather are used to distinguish one element from another.

Please refer to fig. 1, which is a schematic diagram of a foaming master batch according to a first embodiment of the present invention. As shown in the drawing, the present embodiment provides a foaming mother particle 1 for in-mold foaming, and the foaming mother particle 1 of the present embodiment has a plurality of foaming regions, and the degree of bridging is different for each foaming region, and therefore the degree of foaming is different for each foaming region. The bridging degree of the foaming master batch 1 in each foaming area is different by controlling the irradiation dose and irradiation depth of the electron beam, the foaming master batch 1 of the embodiment is used for in-mold foaming, and the elasticity and the buffering degree of the foaming master batch 1 in each foaming area are different after foaming. The foaming master batch 1 comprises a foaming material and a foaming agent, wherein the foaming material comprises ethylene propylene diene monomer, polyolefin plastic, ethylene vinyl acetate copolymer and chlorinated polyethylene. Wherein the blowing agent is selected from the group consisting of azodicarbonamide (ADCA), 4 '-oxybis-benzenesulfonylhydrazide (OBSH), N' -Dinitrosopentamethylenetetramine (DPT), Dinitrosopentamethylenetetramine (DNPT), and sodium bicarbonate (NaHCO)₃) One of them. The composition proportion of the ethylene propylene diene monomer, the polyolefin plastic, the ethylene vinyl acetate copolymer, the chlorinated polyethylene and the foaming agent is between 0% and 100%.

The foaming master batch 1 of this embodiment is a sphere, and has a first foaming area 10 and a second foaming area 11, the first foaming area 10 covers the second foaming area 11, the foaming master batch 1 of the first foaming area 10 has a first bridging degree, the foaming master batch 1 of the second foaming area 11 has a second bridging degree, the first bridging degree is different from the second bridging degree, and the second bridging degree of this embodiment is 0, which means that the foaming master batch 1 in the second foaming area 11 is not subjected to a bridging reaction, i.e. the foaming master batch 1 in the second foaming area 11 is not irradiated by an electron beam.

Please refer to fig. 2, which is a flow chart of the manufacturing process of the foaming master batch according to the first embodiment of the present invention; as shown in the drawing, the method for manufacturing the foamed mother particle 1 of the present embodiment first executes step S10, mixes the foaming material and the foaming agent as an intermediate, and heats the intermediate during the mixing process, wherein the temperature of the heated intermediate is controlled between 60 ℃ and 200 ℃. Next, step S11 is executed to compress the intermediate into at least one foaming mother particle 1. Then, step S12 is executed, the first foaming area 10 of each of the foaming master batches 1 is irradiated by the electron beam emitted by the electron beam irradiation device, so that the foaming master batches 1 in the first foaming area 10 perform a bridging reaction, and the foaming master batches 1 in the first foaming area 10 have a first bridging degree, wherein the first bridging degree is used for controlling the irradiation dose and the irradiation depth of the electron beam emitted by the electron beam irradiation device according to the thickness of the foaming master batches 1 in the first foaming area 10 and a default bridging degree. Wherein the irradiation dose of the electron beam irradiation device during electron beam irradiation is between 200kv and 3000 kv.

Referring to fig. 3, it is a schematic view of an electron beam irradiation apparatus according to a first embodiment of the present invention; as shown in the figure, the electron beam irradiation device 2 of the present embodiment includes an electron beam irradiator 21 and a master batch transfer mechanism 22, wherein the electron beam irradiator 21 is disposed above the master batch transfer mechanism 22, and the irradiation direction of the electron beam 211 is perpendicular to the transfer direction of the master batch transfer mechanism 22. The master batch transfer mechanism 22 of the present embodiment is constituted by a plurality of transfer rollers 221. When at least one foaming master batch 1 is placed in the master batch transmission mechanism 22, the plurality of transmission rollers 221 roll to drive the at least one foaming master batch 1 to advance along the transmission direction, the electron beam irradiator 21 emits the electron beam 211 to the master batch transmission mechanism 22, the at least one foaming master batch 1 passing through the electron beam irradiator 21 is irradiated by the electron beam 211, and when the at least one foaming master batch 1 is irradiated by the electron beam 211, the irradiation dose and the irradiation depth of the electron beam 211 emitted by the electron beam irradiator 21 are controlled, so that only the foaming master batch 1 in the first foaming area 10 is controlled to be irradiated by the electron beam 211 to perform bridging reaction. However, the plurality of conveying rollers 221 of the master batch conveying mechanism 22 can drive the foaming master batches 1 to turn over when rolling, so that the foaming master batches 1 in the first foaming area 10 can be uniformly irradiated by the electron beams. The electron beam irradiation device 2 of the present embodiment is only an embodiment of the present invention, and other electron beam irradiation devices can be used to produce the foaming mother particles 1 of the present embodiment, which is not described herein again.

The foaming master batch 1 in the second foaming area 11 of the present embodiment can also have a certain degree of bridging, only by controlling the irradiation dose and the irradiation depth of the electron beam 211 emitted by the electron beam irradiator 21, the foaming master batches 1 in the first foaming area 10 and the second foaming area 11 can be irradiated by the electron beam 211, however, the first degree of bridging of the foaming master batch 1 in the first foaming area 10 is greater than the second degree of bridging of the foaming master batch 1 in the second foaming area 11, and the foaming master batch 1 can also have a plurality of degrees of bridging, after the foaming master batch 1 is foamed, the foamed foaming master batch 1 has a plurality of elasticity, which also represents that the foamed foaming master batch 1 can have a plurality of buffering degrees, and a multifunctional foaming product can be manufactured by using the foaming master batch 1 of the present embodiment.

Please refer to fig. 4, which is a schematic diagram of a foaming master batch according to a second embodiment of the present invention; as shown in the figure, the foaming master batch 1 of the present embodiment is a sphere, the first foaming region 10 is located on one side of the second foaming region 11, the volume ratio of the first foaming region 10 to the second foaming region 11 of the present embodiment is 1:1, wherein the first bridging degree of the foaming master batch 1 in the first foaming region 10 is different from the second bridging degree of the foaming master batch 1 in the second foaming region 11. The volume ratio of the first foaming area to the second foaming area can be other ratios, which is not described herein again. Please refer to fig. 5 and fig. 6, which are a flow chart of the manufacturing of the foaming master batch and a schematic diagram of the electron beam irradiation device according to the second embodiment of the present invention; as shown in the drawing, the method of manufacturing the foamed mother particle 1 of the present embodiment is performed by first performing step S20, and kneading the foaming material and the foaming agent as an intermediate. Next, step S21 is executed to compress the intermediate into at least one foaming mother particle. Then, step S22 is executed to irradiate the first foaming area 10 of each of the foaming mother particles 1 with the electron beam 211 emitted by the electron beam irradiation device 2, so that the foaming mother particles 1 in the first foaming area 10 undergo a bridging reaction, and the foaming mother particles 1 in the first foaming area 10 have a first bridging degree. Finally, step S23 is executed, the electron beam 211 emitted by the electron beam irradiation device 2 irradiates the second foaming area 11 of each of the foaming mother particles 1, so that the foaming mother particles 1 in the second foaming area 11 perform a bridging reaction, and the foaming mother particles 1 in the second foaming area 11 have a second bridging degree.

The first bridging degree of the foaming master batch 1 in the first foaming region 10 is to control the irradiation dose and irradiation depth of the electron beam 211 emitted by the electron beam irradiation device 2 according to the thickness of the foaming master batch 1 in the first foaming region 10 and the preset first bridging degree, and the foaming master batch 1 in the first foaming region 10 has the first bridging degree after being irradiated by the electron beam 211. The second bridging degree of the foaming master batch 1 in the second foaming area 11 is to control the irradiation dose and irradiation depth of the electron beam 211 emitted by the electron beam irradiation device 2 according to the thickness of the foaming master batch 1 in the second foaming area 11 and the preset second bridging degree, and the foaming master batch 1 in the second foaming area 11 has the first bridging degree after being irradiated by the electron beam 211.

The electron beam irradiation apparatus 2 of the present embodiment includes an electron beam irradiator 21, a master batch transmission mechanism 22 and a master batch fixing member 23, when the foamed master batch 1 is irradiated by the electron beam 211 through the electron beam irradiation apparatus 2, the foamed master batch 1 is fixed by the master batch fixing member 23, the master batch fixing member 23 for fixing the foamed master batch 1 is placed on the master batch transmission mechanism 22, the first foamed region 10 of the foamed master batch 1 faces the electron beam irradiator 21 through the master batch fixing member 23, so that the electron beam irradiator 21 first irradiates the foamed master batch 1 in the first foamed region with the electron beam 211, wherein an irradiation dose and an irradiation depth of the electron beam 211 emitted by the electron beam irradiator 21 are determined according to a thickness of the foamed master batch 1 in the first foamed region 10 and a preset first bridging degree.

When the first foaming areas 10 of the foaming master batch 1 are irradiated by the electron beam, the master batch fixing member 23 is turned over to allow the second foaming area 11 of the foaming master batch 1 to face the electron irradiator 21, and then the irradiation dose and the irradiation depth of the electron beam 211 emitted by the electron irradiator 21 are adjusted according to the thickness of the second foaming area 11 of the foaming master batch 1 and the default second bridging degree, so that the foaming master batch 1 in the second foaming area 11 is irradiated by the electron beam 211 to reach the preset second bridging degree. The electron beam irradiation device 2 is only an embodiment of the present invention, and the foaming mother particles 1 of the present embodiment can be made by using other electron beam irradiation devices 2, which is not described herein again. The foamed mother particles 1 of the present embodiment may be a plate or a strip, and if the foamed mother particles 1 are a plate or a strip, the electron beam irradiation device 2 may omit the mother particle fixing member 23.

Please refer to fig. 7, which is a schematic diagram of a foaming master batch according to a third embodiment of the present invention; as shown in the figure, the foaming master batch 1 of the embodiment is a composite board body, and includes a first foaming board body 12 and a second foaming board body 13 disposed on the first foaming board body 12, and the foaming material of the first foaming board body 12 is different from the foaming material of the second foaming board body 13. The first foam board 12 is a first foam area of the above embodiment, the second foam board 13 is a second foam area of the above embodiment, the first foam board 12 has a first bridging degree after being irradiated by the electron beam, and the second foam board 13 has a second bridging degree after being irradiated by the electron beam, wherein the first bridging degree is different from the second bridging degree.

However, the foaming master batch 1 of the embodiment is directly sent to the electron beam irradiation device to perform electron beam irradiation, and the same electron beam is used to irradiate the first foaming board 12 and the second foaming board 13, in other words, the irradiation dose and the irradiation depth of the electron beam irradiated to the first foaming board 12 and the second foaming board 13 are the same, and the foaming material of the first foaming board 12 is different from the foaming material of the second foaming board 13, so that the first bridging degree of the first foaming board 12 is different from the second bridging degree of the second foaming board 13.

In summary, the present invention provides a foaming master batch for in-mold foaming and a manufacturing method thereof, wherein the foaming master batch has the foaming regions, and the foaming master batch of each foaming region has different bridging degrees, which also means that the foaming master batch of each foaming region has different elasticity and different buffering degrees after foaming, i.e. the foaming master batch after foaming can have different elasticity and different buffering degrees at the same time, so as to manufacture a multifunctional foaming product. The foaming master batch of the invention generates different bridging degrees by electron beam irradiation, and the foaming master batch of each foaming area has different bridging degrees by mainly controlling the irradiation dose and the irradiation depth of the electron beam.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.