CN110885486A - Method for manufacturing foamed sole - Google Patents
Method for manufacturing foamed sole Download PDFInfo
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- CN110885486A CN110885486A CN201911030561.5A CN201911030561A CN110885486A CN 110885486 A CN110885486 A CN 110885486A CN 201911030561 A CN201911030561 A CN 201911030561A CN 110885486 A CN110885486 A CN 110885486A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/04—Plastics, rubber or vulcanised fibre
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Emergency Medicine (AREA)
- General Chemical & Material Sciences (AREA)
- Biological Depolymerization Polymers (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention belongs to the technical field of organic high molecular compounds, and particularly relates to a method for manufacturing a foamed sole, which is prepared from the following raw materials in parts by weight: 10-80 parts of recovered EVA film, 15-40 parts of EVA, 5-25 parts of seaweed meal, 1.3-1.6 parts of foaming agent AC, 0.7-0.9 part of cross-linking agent BIBP, 0.4-0.6 part of zinc stearate, 0.5-0.7 part of stearic acid and 1.5-2 parts of wear-resisting agent, banburying, open refining, granulating and then carrying out one-time injection molding to obtain the biodegradable foamed sole containing the seaweed meal. The foamed sole prepared by the invention realizes the resource recycling of EVA sole stub bars, defective products, waste products and leftover materials, has biodegradability, can relieve the environmental problem caused by white pollution, and helps to promote global sustainable development.
Description
Technical Field
The invention belongs to the technical field of organic high molecular compounds, and particularly relates to a manufacturing method of a foamed sole.
Background
The EVA foamed sole is made of EVA materials, has the advantages of high rebound resilience and tensile strength, high toughness, good shock resistance and buffering performance, excellent heat preservation and cold protection, excellent low-temperature performance and the like, and has a very important position in the shoe material industry.
The existing EVA foaming sole formula usually contains the following components: the rubber particles comprise natural rubber, butadiene rubber, nitrile rubber, EVA (ethylene vinyl acetate), talcum powder, a foaming agent, a DCP (DCP) crosslinking agent, an anti-aging agent and graphene, wherein the foaming agent and the DCP crosslinking agent are generally indispensable components in a foamed sole, chemical crosslinking can be generated between the foaming agent and the DCP crosslinking agent after heating, the EVA sole has larger molecular polymerization degree and strong intermolecular force, and the obtained foamed sole rubber particles have good wear resistance and toughness and strong aging resistance.
The production of the EVA foaming sole can generate redundant EVA waste, and the existing method is to grind the EVA waste into powder or prepare the EVA waste into particles to be secondarily used in the production process of the EVA foaming sole.
However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
1. the EVA foamed sole prepared by the existing EVA foamed sole formula is difficult to degrade, and serious pollution is brought to the environment due to long-term accumulation;
2. the EVA waste is ground into powder or made into granules, which accounts for at most 20 percent of all EVA when in use, and the utilization rate of the EVA waste is too low.
Disclosure of Invention
The embodiment of the application provides a manufacturing method of the foaming sole, solves the technical problems that in the prior art, an EVA foaming sole is difficult to degrade, and the utilization rate of EVA waste materials in the production process of the EVA foaming sole is too low, realizes the recycling of high-value resources of EVA sole leftover materials, and has biodegradable seaweed powder-containing biodegradable foaming sole, so that the environmental problem caused by white pollution can be relieved, and the global sustainable development can be promoted.
The embodiment of the application provides a manufacturing method of a foaming sole, which comprises the following steps:
(a) crushing the waste EVA material to form a crushed material;
(b) carrying out banburying and open milling on 72 parts of the crushed material, 5 parts of mineral oil and 74706 parts of EVA, and then rolling to obtain a recovered EVA film;
(c) preparing biodegradable material rice, wherein the biodegradable material rice is prepared from the following components in parts by weight:
firstly, uniformly mixing other raw materials except the crosslinking agent BIBP and the foaming agent AC, then carrying out banburying, adjusting the banburying temperature to be 86-91 ℃, keeping for 4 minutes and then stirring; when the banburying temperature is increased to 95 ℃, turning materials for the second time; when the banburying temperature is increased to 101 ℃, turning for the third time, and adding a crosslinking agent BIBP and a foaming agent AC; when the banburying temperature rises to 107 ℃, turning materials for the fourth time; when the banburying temperature rises to 112 ℃, turning over materials for the fifth time, banburying for 1 minute, and finally pouring, opening and granulating to obtain biodegradable material rice;
(d) adding the biodegradable material into a machine, automatically sucking the material, and performing one-time injection molding at the gun temperature of 90-105 ℃, the mold temperature of 175-180 ℃ and the time of 180-220 seconds to obtain the foamed sole.
Further, the waste EVA materials in the step (a) comprise scrap heads, defective products, waste products and leftover materials generated in the process of producing EVA shoe soles.
Further, the thickness of the broken material in the step (a) is 1.3mm-3mm, and the width of the broken material is 2mm-5 mm.
Further, the thickness of the recovered EVA film is 0.01mm-0.05 mm.
Further, the thickness of the recovered EVA film is 0.01mm-0.02 mm.
Further, the amount of the recovered EVA film in the step (c) is 2 to 2.2 times the amount of the EVA film.
Furthermore, the seaweed powder in the step (c) is obtained by drying and desalting natural seaweed, and the fineness is 400-3000 meshes.
Further, the foaming agent AC in the step (c) is a modified foaming agent AC, and the decomposition temperature is 170-200 ℃.
Further, the biodegradable rice in the step (c) is cake-shaped, and has a thickness of 1.5mm-4mm and a diameter of 4mm-8 mm.
Further, the waste EVA materials are crushed by a crusher, the crusher is of a double-roller semi-open type, the distance between a front roller and a rear roller is 1mm-4mm, the speed ratio of the front roller to the rear roller is 1:1-1:2, and the roller temperature is 0-50 ℃.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the seaweed powder is dried and desalted by natural seaweed, is environment-friendly and biodegradable, is easy to be decomposed and metabolized by enzymes in various microorganisms or animals and plants in the nature, is a typical biodegradable polymer material, and residues exist in dispersed small particles of powder; the seaweed powder does not react with other components of the EVA sole and is uniformly dispersed in the EVA sole, so that the EVA sole can be dispersed into fine particles after the seaweed powder is naturally degraded, the effect of degrading the EVA sole is achieved, the environmental problem caused by white pollution is greatly relieved, the petroleum resource is saved, the global greenhouse effect is reduced, the development direction of the current materials is met, and the global sustainable development is promoted.
2. The recycling EVA film obtained by crushing, banburying and calendering the stub bars, defective products, waste products and leftover materials generated in the process of producing the EVA sole by a crusher effectively solves the problem of difficult recycling of the EVA foamed sole, further realizes recycling of the EVA sole waste materials, can well remove solid insoluble substances such as sand, metal, glass and the like, avoids the problems of large dust, easy material death and easy ignition of the ground EVA leftover materials, and realizes high-value recycling of the EVA leftover materials and the secondary waste materials.
3. The recycled EVA film and the EVA are adopted, and the recycled EVA film is 2-2.2 times of the EVA film, so that the problem of low utilization rate of the recycled EVA film is effectively solved, the recycled EVA film is used as a main system, the EVA is used for adjusting the overall performance, and the obtained EVA foamed sole has the characteristics of light weight, high elasticity, low cost and the like3Hardness of 62C, DIN abrasion resistance of 181mm3And a rebound resilience of 57%; comparative example C biodegradable foamed shoe sole containing seaweed powder and having a density of 0.19g/cm3Hardness 60C, DIN wear resistance 284mm3The rebound rate is 49%, namely the property of the recycled EVA film is obviously better than that of the EVA recycled powder, and compared with the commercially available EVA sole material, the recycled EVA sole material has the performance close to or even better than that of the commercially available EVA sole material, so that the high-value recycling of the EVA is realized, the utilization rate of the EVA is improved, the raw material cost is reduced, and the recycled EVA sole material is more environment-friendly.
Detailed Description
The embodiment of the application provides a manufacturing method of the foaming sole, and solves the problems that in the prior art, the EVA foaming sole is difficult to degrade, and the utilization rate of EVA waste is too low.
The invention will now be further illustrated with reference to specific examples.
The following are a summary of the raw material compositions of the examples and comparative examples, resulting in table 1:
TABLE 1 summary of the raw material compositions of the examples and comparative examples
Example 1:
in this embodiment, the foamed sole includes the following steps:
step 1: preparing a recycled EVA film, and crushing a stub bar, a defective product, a waste product and a leftover material generated in the production process of an EVA sole by a crusher; then carrying out banburying on 72 parts of crushed materials, 5 parts of mineral oil and 74706 parts of EVA in an internal mixer, then carrying out open mixing, and finally calendering to obtain a recycled EVA film with the thickness of 0.02 mm;
step 2: the biodegradable material rice is prepared from the following raw materials in parts by weight:
firstly, mixing other raw materials except the crosslinking agent BIBP and the foaming agent AC, banburying, adjusting the banburying temperature to be 86-91 ℃, keeping for 4 minutes and then stirring; when the banburying temperature is increased to 95 ℃, turning materials for the second time; when the banburying temperature is increased to 101 ℃, turning for the third time, and adding a crosslinking agent BIBP and a foaming agent AC; when the banburying temperature rises to 107 ℃, turning materials for the fourth time; when the banburying temperature rises to 112 ℃, turning materials for the fifth time, banburying for 1 minute, and finally pouring materials; then carrying out open milling, granulation, cooling and packaging to obtain biodegradable material rice;
and step 3: adding biodegradable material into a charging bucket of an EVA injection machine, automatically sucking the material, and performing one-step injection molding, wherein the temperatures of a first section, a second section and a third section of an injection gun are respectively 90 ℃, 95 ℃ and 100 ℃, the mold temperature is 176 ℃ and the time is 195 seconds, so as to obtain the foamed sole.
The density of the foamed sole prepared by the method is 0.19g/cm3Hardness 62C, DIN abrasion resistance 181mm3Dimensional shrinkage of 0.8% and rebound resilience of 57%.
Example 2:
in this example, the preparation method of the foamed shoe sole was basically the same as that in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
In step 3: the mold temperature was 175 ℃ for 220 seconds.
The density of the foamed sole prepared by the method is 0.22g/cm3Hardness 67C, DIN abrasion resistance 237mm3Dimensional shrinkage of 0.6% and rebound resilience of 50%.
Example 3:
in this example, the preparation method of the foamed shoe sole was basically the same as that in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
In step 3: the temperature of the die is 180 ℃ and the time is 180 seconds.
The density of the foamed sole prepared by the method is 0.18g/cm3Hardness of 60C, DIN abrasion resistance of 196mm3Dimensional shrinkage of 0.9% and rebound resilience of 58%.
Comparative example a:
in this comparative example, the foamed shoe sole was prepared in the same manner as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
In step 3: the temperature of the die is 180 ℃ and the time is 200 seconds.
The density of the foamed sole prepared by the method is 0.23g/cm3Hardness 64C, DIN abrasion resistance 223mm3Dimensional shrinkage of 0.7% and a rebound resilience of 52%.
Comparative example B:
in this comparative example, the foamed shoe sole was prepared in the same manner as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The density of the foamed sole prepared by the method is 0.18g/cm3Hardness 59C, DIN abrasion resistance 175mm3Dimensional shrinkage of 0.9% and a rebound resilience of 60%.
Comparative example C:
in this comparative example, the foamed shoe sole was prepared in the same manner as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The density of the foamed sole prepared by the method is 0.19g/cm3Hardness of 60C, DIN abrasion resistance of 284mm3Dimensional shrinkage of 1.2% and a rebound resilience of 49%.
The data of examples 1 to 3 and comparative examples A/B/C are collated to give the following Table 2 (Note: hardness is measured using a GS-701N durometer, DIN abrasion is measured according to GB/T9867: 2001, dimensional shrinkage is measured according to 50 degrees for 4 hours, and resilience is measured using a GT-7042-RE type impact resilience tester):
table 2: comparison table of performance parameters of biodegradable foamed soles prepared in examples 1-3 and comparative examples A/B/C.
By combining the technical schemes in the embodiments and the comparative examples, the application has at least the following technical effects or advantages:
the recycled EVA film in the embodiment 1 accounts for 69.9% of the total EVA, the recycled EVA film in the embodiment 2 accounts for 55% of the total EVA, the recycled EVA film in the embodiment 3 accounts for 84.2% of the total EVA, and seaweed meal is added in all the 3 embodiments, so that the recycled EVA film is fully utilized, the degradation effect can be achieved, and the comprehensive performances are excellent.
Example 1 compared to comparative example a, no recycled EVA film was used in comparative example a; from the data, the density of example 1 is lower than that of comparative example a, so the sole is also lighter and more effective; although the hardness is lower than that of the comparative example A, the hardness of the EVA sole is between 55 and 65C, the wear resistance is better in the example 1, the smaller the wear resistance is, the more difficult the wear is, the size shrinkage is slightly lower than that of the comparative example 1, and the rebound resilience is better than that of the comparative example 1; by combining the above analysis, the sole performance of example 1 and comparative example A are not much different and all meet the market requirements.
Similarly, in the comparative example B, no seaweed powder is added in the comparative example B, and the prepared sole has no degradation function, but the comprehensive performance of the sole is not greatly different from that of the sole in the example 1, and the sole meets the market requirement.
Compared with the comparative example C, the comparative example C selects the EVA regeneration powder and the seaweed powder, but EVA leftover materials are ground into powder to prepare the EVA regeneration powder, the grinding is mechanical grinding by utilizing a hollow carborundum grinding wheel, the powder is large in dust and pollutes the environment, meanwhile, improper operation is easy to ignite, the safety risk is large, meanwhile, the particle size of the EVA powder is large, the blending performance is poor, the comprehensive performance is poor, high-value recycling cannot be realized, and meanwhile, the comparative example C is poor in comparison with the comparative example 1 in other testing items except that the density is the same as that in the example 1.
In conclusion, the foamed sole prepared according to the invention has biodegradability on the basis of ensuring good comprehensive performances such as light weight, wear resistance, skid resistance, stable size and the like, can relieve the environmental problems caused by white pollution, accords with the development direction of the current materials, is particularly suitable for application in various shoe accessories, sole materials and the like, has good comfort and is suitable for industrial production.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (10)
1. The manufacturing method of the foaming sole is characterized by comprising the following steps:
(a) crushing the waste EVA material to form a crushed material;
(b) carrying out banburying and open milling on 72 parts of the crushed material, 5 parts of mineral oil and 74706 parts of EVA, and then rolling to obtain a recovered EVA film;
(c) preparing biodegradable material rice, wherein the biodegradable material rice is prepared from the following components in parts by weight:
firstly, uniformly mixing other raw materials except the crosslinking agent BIBP and the foaming agent AC, then carrying out banburying, adjusting the banburying temperature to be 86-91 ℃, keeping for 4 minutes and then stirring; when the banburying temperature is increased to 95 ℃, turning materials for the second time; when the banburying temperature is increased to 101 ℃, turning for the third time, and adding the crosslinking agent BIBP and the foaming agent AC; when the banburying temperature rises to 107 ℃, turning materials for the fourth time; when the banburying temperature rises to 112 ℃, turning over materials for the fifth time, banburying for 1 minute, and finally pouring, opening and granulating to obtain biodegradable material rice;
(d) adding the biodegradable material into a machine, automatically sucking the material, and performing one-time injection molding at the gun temperature of 90-105 ℃, the mold temperature of 175-180 ℃ and the time of 180-220 seconds to obtain the foamed sole.
2. The method of claim 1, wherein the waste EVA materials in step (a) include scrap, defective products, waste products, and leftover materials generated during the production of EVA shoe soles.
3. The method for manufacturing a foamed shoe sole according to claim 1, wherein the thickness of the crushed material in the step (a) is 1.3mm to 3mm, and the width of the crushed material is 2mm to 5 mm.
4. The method for manufacturing the foamed sole according to claim 1, wherein the thickness of the recycled EVA film is 0.01mm to 0.05 mm.
5. The method for manufacturing the foamed sole according to claim 4, wherein the thickness of the recycled EVA film is 0.01mm to 0.02 mm.
6. The method of claim 1, wherein the amount of the recycled EVA film in the step (c) is 2 to 2.2 times the amount of the EVA film.
7. The method as claimed in claim 1, wherein the seaweed powder in step (c) is obtained by drying and desalting natural seaweed with a fineness of 400-3000 mesh.
8. The method for manufacturing a foamed shoe sole according to claim 1, wherein the foaming agent AC in the step (c) is a modified foaming agent AC, and the decomposition temperature is 170 ℃ to 200 ℃.
9. The method for manufacturing a foamed shoe sole according to claim 1, wherein the biodegradable rice in the step (c) is cake-shaped, and has a thickness of 1.5mm to 4mm and a diameter of 4mm to 8 mm.
10. The method for manufacturing the foamed sole according to claim 1 or 2, wherein the waste EVA material is crushed by a crusher, the crusher is of a double-roller semi-open type, the distance between a front roller and a rear roller is 1mm-4mm, the speed ratio of the front roller to the rear roller is 1:1-1:2, and the temperature of the rollers is 0 ℃ to 50 ℃.
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Cited By (8)
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| CN112898605A (en) * | 2021-03-22 | 2021-06-04 | 周兴葵 | Seaweed master batch and EVA foaming manufacturing method |
| CN113767003A (en) * | 2020-03-30 | 2021-12-07 | 株式会社永昌Eco | Insole waste recovery method, shoe foam and crushed insole waste |
| CN113771395A (en) * | 2021-09-13 | 2021-12-10 | 福建鸿星尔克体育用品有限公司 | Preparation method of damping sole formed by CPU injection method |
| CN114369302A (en) * | 2021-12-31 | 2022-04-19 | 易宝（福建）高分子材料股份公司 | EVA recycled material closed-cell foam material and preparation method thereof |
| CN114437520A (en) * | 2022-02-24 | 2022-05-06 | 茂泰(福建)鞋材有限公司 | Double-color foamed sole and preparation process thereof |
| CN115028921A (en) * | 2022-06-22 | 2022-09-09 | 福建嘉怡塑胶有限公司 | One-step formed environment-friendly EVA supercritical foaming sole and preparation method thereof |
| CN115746438A (en) * | 2022-10-10 | 2023-03-07 | 茂泰(福建)鞋材有限公司 | EVA composite foamed sole containing itaconate rubber and preparation method thereof |
| WO2023134171A1 (en) * | 2022-01-17 | 2023-07-20 | 茂泰(福建)鞋材有限公司 | Environmentally friendly foaming material based on eva waste materials, and treatment method for eva waste materials |
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Application publication date: 20200317 |