CN108892853A - Rubber plastic blend foaming indsole and its formula are shunk in a kind of heat resistanceheat resistant - Google Patents
Rubber plastic blend foaming indsole and its formula are shunk in a kind of heat resistanceheat resistant Download PDFInfo
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- CN108892853A CN108892853A CN201810510383.5A CN201810510383A CN108892853A CN 108892853 A CN108892853 A CN 108892853A CN 201810510383 A CN201810510383 A CN 201810510383A CN 108892853 A CN108892853 A CN 108892853A
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- indsole
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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
-
- 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
- C08J9/0066—Use of inorganic compounding ingredients
-
- 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
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/06—Copolymers with styrene
-
- 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
- C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
-
- 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
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- 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
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Emergency Medicine (AREA)
- General Chemical & Material Sciences (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The present invention provides a kind of heat resistanceheat resistants to shrink rubber plastic blend foaming indsole, is grouped as by the group of following each mass fractions：Ethylene-vinyl acetate copolymer：80~85；Butadiene-styrene rubber：10~15；Ethylene propylene diene rubber：5~10；Olefin block copolymers：15~20；Talcum powder：30~40；Zinc oxide (ZnO)：2~3；Zinc stearate：1.0~1.5；Cumyl peroxide：1.5~2.5；Azodicarbonamide：5~10；Lignocellulosic：10~20.Bottom material has preferable heat resistanceheat resistant shrinkage in foamed rubber-plastic prepared by the present invention, and 5 days (120h) post-shrinkage ratios are placed under the conditions of 70 DEG C less than 5%, and traditional foaming EVA material percent thermal shrinkage is generally 10% or more.Meanwhile the foamed rubber-plastic material has lower compression deformation rate, preferable stretching and resilience performance, can satisfy the big dress needs of the training strength such as army, People's Armed Police.
Description
Technical field
The present invention relates to a kind of foaming indsoles, and in particular to rubber plastic blend foaming indsole and its formula are shunk in a kind of heat resistanceheat resistant.
Background technique
Currently, the features such as rubber outsole/foaming EVA indsole sport footwear is light comfortable, anti-skid wearable, sole elasticity are good because of its
It is well received by consumers.But since shrinkage ratio is more serious in the case of a high temperature for pure EVA foaming indsole, not only influence manufacturer
Exfactory inspection (being heat-shrinked index, humidification Ageing Index) also affects wearing the service life for shoes simultaneously, when especially summer wears
Cause indsole to be shunk because temperature is higher and then also occasionally has generation the phenomenon that causing indsole deformation to be come unglued.And in tradition EVA foaming
The military training needs that the durability at bottom is unable to satisfy high-intensitive high load capacity, wears environment complexity.Therefore, improve foaming indsole
Heat resistanceheat resistant shrinkage is to improve into one of the important channel of shoes wear and comfort.
Summary of the invention
The object of the present invention is to provide a kind of heat resistanceheat resistants to shrink rubber plastic blend foaming indsole.
Rubber plastic blend foaming indsole is shunk in heat resistanceheat resistant provided by the present invention, is grouped by the group of following each mass fractions (phr)
At：
Ethylene-vinyl acetate copolymer：80~85
Butadiene-styrene rubber：10~15
Ethylene propylene diene rubber：5~10
Olefin block copolymers：15~20
Talcum powder：30~40
Zinc oxide (ZnO)：2~3
Zinc stearate：1.0~1.5
Cumyl peroxide (DCP)：1.5~2.5
Azodicarbonamide (AC foaming agent)：5~10
Lignocellulosic：10~20.
Specifically, the heat resistanceheat resistant shrinks rubber plastic blend foaming indsole by 1) -5) in any mass fraction (phr)
Group be grouped as：
1) ethylene-vinyl acetate copolymer：80；Butadiene-styrene rubber：15；Ethylene propylene diene rubber：5；Olefin block copolymers：
20；Talcum powder：30；Zinc oxide (ZnO)：2；Zinc stearate：1.0；Cumyl peroxide (DCP)：2；Azodicarbonamide (AC
Foaming agent)：5；Lignocellulosic：10；
2) ethylene-vinyl acetate copolymer：85；Butadiene-styrene rubber：10；Ethylene propylene diene rubber：10；Olefin block copolymers：
15；Talcum powder：30；Zinc oxide (ZnO)：2.5；Zinc stearate：1.5；Cumyl peroxide (DCP)：1.5；Two formyl of azo
Amine (AC foaming agent)：10；Lignocellulosic：15；
3) ethylene-vinyl acetate copolymer：85；Butadiene-styrene rubber：10；Ethylene propylene diene rubber：10；Olefin block copolymers：
15；Talcum powder：40；Zinc oxide (ZnO)：2.5；Zinc stearate：1.5；Cumyl peroxide (DCP)：2；Azodicarbonamide
(AC foaming agent)：7.5；Lignocellulosic：15；
4) ethylene-vinyl acetate copolymer：85；Butadiene-styrene rubber：10；Ethylene propylene diene rubber：5；Olefin block copolymers：
15；Talcum powder：35；Zinc oxide (ZnO)：3；Zinc stearate：1；Cumyl peroxide (DCP)：2.5；Azodicarbonamide (AC
Foaming agent)：10；Lignocellulosic：20；
5) ethylene-vinyl acetate copolymer：80；Butadiene-styrene rubber：15；Ethylene propylene diene rubber：10；Olefin block copolymers：
20；Talcum powder：35；Zinc oxide (ZnO)：3；Zinc stearate：1.5；Cumyl peroxide (DCP)：2.5；Azodicarbonamide
(AC foaming agent)：7.5；Lignocellulosic：15；
Wherein, the ethylene-ethyl acetate copolymer concretely 7470 EVA, weight average molecular weight be (0.8~3.0) ×
103。
Concretely 1500 SBR, weight average molecular weight are (2~10) × 10 to the butadiene-styrene rubber5。
Concretely 4750 EPDM, weight average molecular weight are (1.0~2.5) × 10 to the ethylene propylene diene rubber5。
The olefin block copolymers are specially OBC 9107, and weight average molecular weight is (1.0~1.5) × 105。
The lignocellulosic is produced by natural timber refinement, and length is (300~500) μm.
The density that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be (0.20~0.25) g/cm3, concretely (0.22
~0.25) g/cm3、0.22g/cm3、0.23g/cm3、0.24g/cm3Or 0.25g/cm3。
The hardness that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be (58~62) Shore C.
The compression deformation rate (testing after 50% placement 72h of compression) that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be
(19.9~22.2) %.
The percent thermal shrinkage (testing after placing 120h under the conditions of 70 DEG C) that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be
(3.7~4.8) %.
The tensile strength that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be (2.65~2.74) MPa.
The elongation rate of tensile failure that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be (225.1~268.2) %
The resilience that rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant can be (48~49) %.
The present invention also provides a kind of methods for preparing above-mentioned heat resistanceheat resistant and shrinking rubber plastic blend foaming indsole, include the following steps：
1) lignocellulosic and water are mixed, stirs evenly, obtains lignocellulosic aqueous solution；
2) it is put into togerther mixer with the lignocellulosic aqueous solution after mixing the other components in addition to foaming agent,
Heating is kneaded；
3) foaming agent then is added, continues to be kneaded, until uniformly；
4) it is granulated, obtains rubber plastic blend particle；
5) the rubber plastic blend particle is put into mold, foaming is shunk in rubber plastic blend foaming to get the heat resistanceheat resistant
Bottom.
In above method step 1), the weight ratio of the lignocellulosic and water can be 1：3~5, concretely 1:3.
In above method step 2), the temperature of the mixing can be (130 ± 2) DEG C, and mixing time can be (40~50)
min。
In above method step 3), the temperature for continuing to be kneaded can be (130 ± 2) DEG C, and continuing mixing time can be (3
~5) min.
In above method step 5), the temperature of the mold can be (180 ± 5) DEG C, and the foaming time can be (5~6)
min。
The present invention also provides a kind of shoes, the indsole of the shoes is that rubber plastic blend foaming indsole is shunk in above-mentioned heat resistanceheat resistant.
The shoes concretely sport footwear.
The present invention has the following advantages that：
Compared with common EVA foams indsole, the present invention is had the following advantages that：First is that heat resistanceheat resistant shrinkage is prominent, especially
Preferable dimensional stability is able to maintain in hydrothermal aging environment；Second is that anti-compression properties are good, shoes are ensured during wearing
The durability at bottom；Third is that indsole density of the invention is low, the lightweight that can further promote into shoes is horizontal.
Specific embodiment
The present invention will be described below by way of specific embodiments, but the present invention is not limited thereto.
Experimental method used in following embodiments is conventional method unless otherwise specified；Institute in following embodiments
Reagent, material etc., are commercially available unless otherwise specified.
Embodiment
Raw material is divided into the group in table 1 respectively, heat resistanceheat resistant is prepared by the following method and shrinks rubber plastic blend foaming indsole：
1) by lignocellulosic and water with mass ratio 1:3 mixing, stir evenly, obtain lignocellulosic aqueous solution；
2) it is put into togerther mixer with the lignocellulosic aqueous solution after mixing the other components in addition to foaming agent,
It is warming up to (130 ± 2) DEG C, is kneaded 45min；
3) it then adds foaming agent, continues to be kneaded 5min at (130 ± 2) DEG C, until uniformly；
4) it is granulated, obtains rubber plastic blend particle；
5) the rubber plastic blend particle is put into 180 DEG C of molds, foaming 5min shrinks rubber and plastic to get the heat resistanceheat resistant
Foaming indsole is blended.
1 composition of raw materials of table
| Raw material and mass fraction (phr) | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 |
| EVA | 80 | 85 | 85 | 85 | 80 | 100 |
| SBR | 15 | 10 | 10 | 10 | 15 | 0 |
| EPDM | 5 | 10 | 10 | 5 | 10 | 0 |
| OBC9107 | 20 | 15 | 15 | 15 | 20 | 10 |
| Talcum powder | 30 | 30 | 40 | 35 | 35 | 30 |
| Zinc oxide | 2 | 2.5 | 2.5 | 3 | 3 | 2 |
| Zinc stearate | 1 | 1.5 | 1.5 | 1 | 1.5 | 1 |
| DCP | 2 | 1.5 | 2 | 2.5 | 2.5 | 2 |
| AC foaming agent | 5 | 10 | 7.5 | 10 | 7.5 | 5 |
| Lignocellulosic | 10 | 15 | 15 | 20 | 15 | 0 |
It shrinks rubber plastic blend foaming indsole to the heat resistanceheat resistant being prepared to be tested for the property, test result such as table 2.
2 physical property of table
From table 2 it can be seen that bottom material has preferable heat resistanceheat resistant shrinkage in foamed rubber-plastic prepared by the present invention, 70
5 days (120h) post-shrinkage ratios are placed under the conditions of DEG C less than 5%, and traditional foaming EVA material percent thermal shrinkage is generally 10%
More than.Meanwhile the foamed rubber-plastic material has lower compression deformation rate, preferable stretching and resilience performance, can satisfy portion
The big dress of the training strength such as team, People's Armed Police needs.
Claims (10)
1. rubber plastic blend foaming indsole is shunk in a kind of heat resistanceheat resistant, it is grouped as by the group of following each mass fractions：
Ethylene-vinyl acetate copolymer：80~85
Butadiene-styrene rubber：10~15
Ethylene propylene diene rubber：5~10
Olefin block copolymers：15~20
Talcum powder：30~40
Zinc oxide：2~3
Zinc stearate：1.0~1.5
Cumyl peroxide：1.5~2.5
Azodicarbonamide：5~10
Lignocellulosic：10~20.
2. indsole according to claim 1, it is characterised in that：The ethylene-ethyl acetate copolymer is EVA 7470, weight
Average molecular weight is (0.8~3.0) × 103；
The butadiene-styrene rubber is SBR 1500, and weight average molecular weight is (2~10) × 105；
The ethylene propylene diene rubber is EPDM 4750, and weight average molecular weight is (1.0~2.5) × 105；
The olefin block copolymers are OBC 9107, and weight average molecular weight is (1.0~1.5) × 105；
The length of the lignocellulosic is (300~500) μm.
3. indsole according to claim 1 or 2, it is characterised in that：The close of rubber plastic blend foaming indsole is shunk in the heat resistanceheat resistant
Degree is (0.20~0.25) g/cm3；Hardness is (58~62) Shore C；Compression deformation rate is (19.9~22.2) %；It is heat-shrinked
Rate is (3.7~4.8) %；Tensile strength is (2.65~2.74) MPa；Elongation rate of tensile failure is (225.1~268.2) %；Rebound
Property be (48~49) %.
4. the method for preparing indsole of any of claims 1-3, includes the following steps：
1) lignocellulosic and water are mixed, stirs evenly, obtains lignocellulosic aqueous solution；
2) it is put into togerther mixer with the lignocellulosic aqueous solution after mixing the other components in addition to foaming agent, is risen
Temperature is kneaded；
3) foaming agent then is added, continues to be kneaded, until uniformly；
4) it is granulated, obtains rubber plastic blend particle；
5) the rubber plastic blend particle is put into mold, foaming shrinks rubber plastic blend foaming indsole to get the heat resistanceheat resistant.
5. according to the method described in claim 4, it is characterized in that：In the method step 1), the lignocellulosic and water
Weight ratio be 1：3~5.
6. method according to claim 4 or 5, it is characterised in that：In the method step 2), the temperature of the mixing is
(130 ± 2) DEG C, the time of mixing are (40~50) min.
7. the method according to any one of claim 4-6, it is characterised in that：In the method step 3), the continuation
Melting temperature is (130 ± 2) DEG C, and continuation mixing time is (3~5) min.
8. the method according to any one of claim 4-7, it is characterised in that：In the method step 5), the mold
Temperature be (180 ± 5) DEG C, the foaming time be (5~6) min.
9. a kind of shoes, the indsole of the shoes is that rubber plastic blend foaming indsole is shunk in heat resistanceheat resistant of any of claims 1-3.
10. shoes according to claim 9, it is characterised in that：The shoes are sport footwear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510383.5A CN108892853A (en) | 2018-05-24 | 2018-05-24 | Rubber plastic blend foaming indsole and its formula are shunk in a kind of heat resistanceheat resistant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510383.5A CN108892853A (en) | 2018-05-24 | 2018-05-24 | Rubber plastic blend foaming indsole and its formula are shunk in a kind of heat resistanceheat resistant |
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| CN112521711A (en) * | 2019-09-19 | 2021-03-19 | 台橡股份有限公司 | Thermoplastic elastomer composition, foamed material thereof and manufacturing method thereof |
| CN114634681A (en) * | 2022-03-16 | 2022-06-17 | 达州市嘉源体育用品有限公司 | High-elastic anti-static sole and preparation method thereof |
| CN116102814A (en) * | 2021-11-11 | 2023-05-12 | 茂泰(福建)鞋材有限公司 | Ultra-light shock absorption EVA sole and preparation process thereof |
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| CN107936321A (en) * | 2017-11-03 | 2018-04-20 | 中国科学院宁波材料技术与工程研究所 | A kind of shooting foaming elastomeric material and preparation method thereof |
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| WO2015144577A1 (en) * | 2014-03-28 | 2015-10-01 | Basf Se | Lignocellulosic materials labelled with polymer particles containing fluorescent dye |
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| CN106117766A (en) * | 2016-06-27 | 2016-11-16 | 湖北福力德鞋业有限责任公司 | A kind of high resilience ageing-resistant EVA expanded material and preparation method thereof |
| CN107129626A (en) * | 2017-05-17 | 2017-09-05 | 探路者控股集团股份有限公司 | A kind of elastic sole and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521711A (en) * | 2019-09-19 | 2021-03-19 | 台橡股份有限公司 | Thermoplastic elastomer composition, foamed material thereof and manufacturing method thereof |
| CN116102814A (en) * | 2021-11-11 | 2023-05-12 | 茂泰(福建)鞋材有限公司 | Ultra-light shock absorption EVA sole and preparation process thereof |
| CN114634681A (en) * | 2022-03-16 | 2022-06-17 | 达州市嘉源体育用品有限公司 | High-elastic anti-static sole and preparation method thereof |
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Application publication date: 20181127 |