CN106832551A - It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently - Google Patents
It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently Download PDFInfo
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- CN106832551A CN106832551A CN201710104351.0A CN201710104351A CN106832551A CN 106832551 A CN106832551 A CN 106832551A CN 201710104351 A CN201710104351 A CN 201710104351A CN 106832551 A CN106832551 A CN 106832551A
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- plastic material
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- resisting
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The present invention relates to technical field of polymer materials, specifically related to a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, its formula is made up of 20 ~ 40% ethylene-vinyl acetate copolymers, 10 ~ 25% olefin block copolymers, 30 ~ 50% ethylene propylene diene rubbers and 0 ~ 10% whiting, 1 ~ 3% activated zinc oxide, 1 ~ 6% vinyltrimethoxy silane, 0.5 ~ 1.5% stearic acid, 0.5 ~ 1% dual-tert-butyl dicumyl peroxide, 1 ~ 3% azodicarbonamide according to specific proportioning, synergy.Compared with prior art, the prepared composite rubber-plastic material of the present invention, the characteristics such as the high-wearing feature of the high flexibility of plastic cement, high resiliency and rubber, high-compressibility are combined together well, have had good anti-wear performance and softness concurrently.
Description
Technical field
The present invention relates to technical field of polymer materials, and in particular to a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently.
Background technology
Composite rubber-plastic material can be used to make sole, insulation, heat-barrier material etc., and it has in daily life and industrially
Purposes widely.Currently used for the composite rubber-plastic material of sole, the market requirement most basic to its is exactly preferably comfortable
Property, service life more long, but, being had the following disadvantages the existing material for sole more：1）Wearability is poor, for some
Wearability requirement footwear high, in addition it is also necessary to which in the wear-resisting rubber-sole of Part able to be adhered to sole last layer, thus preparation technology is complicated；2）Pliability and
Elasticity is poor, and foot feels uncomfortable when walking for a long time, especially in the case where road surface is more hard or to aeroelastic requirements
Occasion higher is difficult to be applicable；3）Cost of material is higher, in order to reach certain gas release, need to add more expanded material.
The content of the invention
There is above-mentioned technical problem for prior art, wear-resisting and flexibility is had concurrently it is an object of the invention to provide one kind
Composite rubber-plastic material, the material by characteristics such as the high-wearing feature of the high flexibility of plastic cement, high resiliency and rubber, high-compressibilities very
It is combined together well, so as to possess excellent flexibility and anti-wear performance.
To achieve the above object, the present invention provides following technical scheme：
Offer is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 20 ~ 40%
Olefin block copolymers 10 ~ 25%
Ethylene propylene diene rubber 30 ~ 50%
Whiting 0 ~ 10%
Activated zinc oxide 1 ~ 3%
Vinyltrimethoxy silane 1 ~ 6%
Stearic acid 0.5 ~ 1.5%
Dual-tert-butyl dicumyl peroxide 0.5 ~ 1%
Azodicarbonamide 1 ~ 3%.
Preferably, the composite rubber-plastic material is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 20 ~ 35%
Olefin block copolymers 10 ~ 25%
Ethylene propylene diene rubber 35 ~ 50%
Whiting 0 ~ 10%
Activated zinc oxide 1 ~ 3%
Vinyltrimethoxy silane 2 ~ 5%
Stearic acid 0.5 ~ 1.5%
Dual-tert-butyl dicumyl peroxide 0.5 ~ 1%
Azodicarbonamide 1 ~ 3%.
Preferably, the composite rubber-plastic material is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 35%
Olefin block copolymers 20%
Ethylene propylene diene rubber 32%
Whiting 6%
Activated zinc oxide 2%
Vinyltrimethoxy silane 3%
Stearic acid 0.5%
Dual-tert-butyl dicumyl peroxide 0.5%
Azodicarbonamide 1%.
Preferably, the composite rubber-plastic material is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 30%
Olefin block copolymers 10%
Ethylene propylene diene rubber 50%
Whiting 4%
Activated zinc oxide 1%
Vinyltrimethoxy silane 2%
Stearic acid 0.5%
Dual-tert-butyl dicumyl peroxide 1%
Azodicarbonamide 1.5%.
Preferably, the composite rubber-plastic material is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 20%
Olefin block copolymers 15%
Ethylene propylene diene rubber 45%
Whiting 8%
Activated zinc oxide 3%
Vinyltrimethoxy silane 5%
Stearic acid 1%
Dual-tert-butyl dicumyl peroxide 1%
Azodicarbonamide 2%.
Preferably, the composite rubber-plastic material is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 26%
Olefin block copolymers 25%
Ethylene propylene diene rubber 40%
Whiting 2%
Activated zinc oxide 1%
Vinyltrimethoxy silane 2%
Stearic acid 1.5%
Dual-tert-butyl dicumyl peroxide 1%
Azodicarbonamide 2.5%.
Beneficial effects of the present invention：
Compared with prior art, it is of the invention it is a kind of have wear-resisting and flexibility composite rubber-plastic material concurrently, its formula is by 20 ~ 40%
Ethylene-vinyl acetate copolymer, 10 ~ 25% olefin block copolymers, 30 ~ 50% ethylene propylene diene rubbers and 0 ~ 10% whiting, 1 ~
3% activated zinc oxide, 1 ~ 6% vinyltrimethoxy silane, 0.5 ~ 1.5% stearic acid, 0.5 ~ 1% dual-tert-butyl peroxidating diisopropyl
Base benzene, 1 ~ 3% azodicarbonamide are made according to specific proportioning, synergy.Compared with prior art, rubber and plastic of the invention
Composite, the characteristic such as the high flexibility of plastic cement, high resiliency and high-wearing feature, the high-compressibility of rubber is combined one well
Rise, be formulated overall flexibility and anti-wear performance, therefore, had concurrently using the sole made by composite rubber-plastic material of the invention
Excellent flexibility and anti-wear performance, improve the wearing comfort and service life of shoes, and foot is not when walking for a long time
Can feel uncomfortable, be particularly well-suited to more hard road surface or the occasion higher to aeroelastic requirements；And using the present invention
Composite rubber-plastic material can machine-shaping be directly sole, without pasting one layer of rubber wear-resisting layer on sole, so as to simplify
The preparation technology of sole；In addition, the raw material dosage with prior art on the basis of identical gas release is reached used by the present invention is few,
Cost is relatively low, it is adaptable to mass produce, with wide commercial application prospect.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1：
It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 35%
Olefin block copolymers 20%
Ethylene propylene diene rubber 32%
Whiting 6%
Activated zinc oxide 2%
Vinyltrimethoxy silane 3%
Stearic acid 0.5%
Dual-tert-butyl dicumyl peroxide 0.5%
Azodicarbonamide 1%.
The preparation technology of the composite rubber-plastic material is as follows：
The pre- mixing and granulation of step one, raw material：
By formula ratio, 20% plastic cement and 32% ethylene propylene diene rubber are carried out into pre- mixing, during want stirring 3 ~ 5 times, work as temperature
When degree reaches 130 ~ 140 DEG C, discharging granulation obtains premix；Premix granulation temperature be 110 ~ 130 DEG C, the time be 14 ~
16s；
In step one, the plastic cement is 35% ethylene-vinyl acetate copolymer and the mixture of 20% olefin block copolymers.
Step 2, secondary mixing and granulation：
After cooling 24h at normal temperatures is placed in premix that step one is obtained, then remaining with step one 80% plastic cement and 6%
Whiting, 2% activated zinc oxide, 3% vinyltrimethoxy silane, 0.5% stearic acid, 0.5% dual-tert-butyl peroxidating diisopropyl
Base benzene, 1% azodicarbonamide are kneaded again together, and when the temperature of secondary mixing reaches 110 ~ 120 DEG C, discharging granulation is obtained
Finished product material；The temperature of finished product material granulation is 80 ~ 100 DEG C, and the time is 14 ~ 16s.
Step 3, ejection formation：
Finished product material prepared by step 2 is put into carries out shot foamed moulding in mould in mould, injection pressure is 80Bar, projects speed
It is 10g/s to spend, and molding time is 370s, that is, obtain the composite rubber-plastic material.
Embodiment 2：
It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 30%
Olefin block copolymers 10%
Ethylene propylene diene rubber 50%
Whiting 4%
Activated zinc oxide 1%
Vinyltrimethoxy silane 2%
Stearic acid 0.5%
Dual-tert-butyl dicumyl peroxide 1%
Azodicarbonamide 1.5%.
The preparation technology of the composite rubber-plastic material is as follows：
The pre- mixing and granulation of step one, raw material：
By formula ratio, 20% plastic cement and 50% ethylene propylene diene rubber are carried out into pre- mixing, during want stirring 3 ~ 5 times, work as temperature
When degree reaches 130 ~ 140 DEG C, discharging granulation obtains premix；Premix granulation temperature be 110 ~ 130 DEG C, the time be 14 ~
16s；
In step one, the plastic cement is 30% ethylene-vinyl acetate copolymer and the mixture of 10% olefin block copolymers.
Step 2, secondary mixing and granulation：
After cooling 24h at normal temperatures is placed in premix that step one is obtained, then remaining with step one 80% plastic cement and 4%
Whiting, 1% activated zinc oxide, 2% vinyltrimethoxy silane, 0.5% stearic acid, 1% dual-tert-butyl diisopropyl peroxide
Benzene, 1.5% azodicarbonamide are kneaded again together, and when the temperature of secondary mixing reaches 110 ~ 120 DEG C, discharging granulation is obtained
Finished product material；The temperature of finished product material granulation is 80 ~ 100 DEG C, and the time is 14 ~ 16s.
Step 3, ejection formation：
Finished product material prepared by step 2 is put into carries out shot foamed moulding in mould in mould, injection pressure is 90Bar, projects speed
It is 20g/s to spend, and molding time is 350s, that is, obtain the composite rubber-plastic material.
Embodiment 3：
It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 20%
Olefin block copolymers 15%
Ethylene propylene diene rubber 45%
Whiting 8%
Activated zinc oxide 3%
Vinyltrimethoxy silane 5%
Stearic acid 1%
Dual-tert-butyl dicumyl peroxide 1%
Azodicarbonamide 2%.
The preparation technology of the composite rubber-plastic material is as follows：
The pre- mixing and granulation of step one, raw material：
By formula ratio, 20% plastic cement and 45% ethylene propylene diene rubber are carried out into pre- mixing, during want stirring 3 ~ 5 times, work as temperature
When degree reaches 130 ~ 140 DEG C, discharging granulation obtains premix；Premix granulation temperature be 110 ~ 130 DEG C, the time be 14 ~
16s；
In step one, the plastic cement is 20% ethylene-vinyl acetate copolymer and the mixture of 15% olefin block copolymers.
Step 2, secondary mixing and granulation：
After cooling 24h at normal temperatures is placed in premix that step one is obtained, then remaining with step one 80% plastic cement and 8%
Whiting, 3% activated zinc oxide, 5% vinyltrimethoxy silane, 1% stearic acid, 1% dual-tert-butyl dicumyl peroxide,
2% azodicarbonamide is kneaded again together, and when the temperature of secondary mixing reaches 110 ~ 120 DEG C, discharging granulation obtains finished product
Material；The temperature of finished product material granulation is 80 ~ 100 DEG C, and the time is 14 ~ 16s.
Step 3, ejection formation：
Finished product material prepared by step 2 is put into carries out shot foamed moulding in mould in mould, injection pressure is 100Bar, is projected
Speed is 30 g/s, and molding time is 330s, that is, obtain the composite rubber-plastic material.
Embodiment 4：
It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is made up of the raw material of following mass percent：
Ethylene-vinyl acetate copolymer 26%
Olefin block copolymers 25%
Ethylene propylene diene rubber 40%
Whiting 2%
Activated zinc oxide 1%
Vinyltrimethoxy silane 2%
Stearic acid 1.5%
Dual-tert-butyl dicumyl peroxide 1%
Azodicarbonamide 2.5%.
The preparation technology of the composite rubber-plastic material is as follows：
The pre- mixing and granulation of step one, raw material：
By formula ratio, 20% plastic cement and 40% ethylene propylene diene rubber are carried out into pre- mixing, during want stirring 3 ~ 5 times, work as temperature
When degree reaches 130 ~ 140 DEG C, discharging granulation obtains premix；Premix granulation temperature be 110 ~ 130 DEG C, the time be 14 ~
16s；
In step one, the plastic cement is 26% ethylene-vinyl acetate copolymer and the mixture of 25% olefin block copolymers.
Step 2, secondary mixing and granulation：
After cooling 24h at normal temperatures is placed in premix that step one is obtained, then remaining with step one 80% plastic cement and 2%
Whiting, 1% activated zinc oxide, 2% vinyltrimethoxy silane, 1.5% stearic acid, 1% dual-tert-butyl diisopropyl peroxide
Benzene, 2.5% azodicarbonamide are kneaded again together, and when the temperature of secondary mixing reaches 110 ~ 120 DEG C, discharging granulation is obtained
Finished product material；The temperature of finished product material granulation is 80 ~ 100 DEG C, and the time is 14 ~ 16s.
Step 3, ejection formation：
Finished product material prepared by step 2 is put into carries out shot foamed moulding in mould in mould, injection pressure is 95Bar, projects speed
It is 25 g/s to spend, and molding time is 340s, that is, obtain the composite rubber-plastic material.
Performance detection is carried out to above-described embodiment 1 to the composite rubber-plastic material for implementing 4, by standard GB/T/T 19250--
2003 method of testings are carried out, and are contrasted with plastic foam material general on the market, as a result as shown in table 1 below：
The embodiment 1 of table 1. to implement 4 composite rubber-plastic material and general plastic foam material performance detection data
As shown in Table 1, composite rubber-plastic material of the invention, has had excellent flexibility and anti-wear performance concurrently, by the Gao Rou of plastic cement
The characteristics such as high-wearing feature, the high-compressibility of soft, high resiliency and rubber are combined together well.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of scope is protected, although being explained to the present invention with reference to preferred embodiment, one of ordinary skill in the art should
Work as understanding, technical scheme can be modified or equivalent, without deviating from the reality of technical solution of the present invention
Matter and scope.
Claims (6)
- It is 1. a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is characterised in that：It is made up of the raw material of following mass percent：Ethylene-vinyl acetate copolymer 20 ~ 40%Olefin block copolymers 10 ~ 25%Ethylene propylene diene rubber 30 ~ 50%Whiting 0 ~ 10%Activated zinc oxide 1 ~ 3%Vinyltrimethoxy silane 1 ~ 6%Stearic acid 0.5 ~ 1.5%Dual-tert-butyl dicumyl peroxide 0.5 ~ 1%Azodicarbonamide 1 ~ 3%.
- It is 2. according to claim 1 a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is characterised in that：By following The raw material of mass percent is made：Ethylene-vinyl acetate copolymer 20 ~ 35%Olefin block copolymers 10 ~ 25%Ethylene propylene diene rubber 35 ~ 50%Whiting 0 ~ 10%Activated zinc oxide 1 ~ 3%Vinyltrimethoxy silane 2 ~ 5%Stearic acid 0.5 ~ 1.5%Dual-tert-butyl dicumyl peroxide 0.5 ~ 1%Azodicarbonamide 1 ~ 3%.
- It is 3. according to claim 1 a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is characterised in that：By following The raw material of mass percent is made：Ethylene-vinyl acetate copolymer 35%Olefin block copolymers 20%Ethylene propylene diene rubber 32%Whiting 6%Activated zinc oxide 2%Vinyltrimethoxy silane 3%Stearic acid 0.5%Dual-tert-butyl dicumyl peroxide 0.5%Azodicarbonamide 1%.
- It is 4. according to claim 1 a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is characterised in that：By following The raw material of mass percent is made：Ethylene-vinyl acetate copolymer 30%Olefin block copolymers 10%Ethylene propylene diene rubber 50%Whiting 4%Activated zinc oxide 1%Vinyltrimethoxy silane 2%Stearic acid 0.5%Dual-tert-butyl dicumyl peroxide 1%Azodicarbonamide 1.5%.
- It is 5. according to claim 1 a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is characterised in that：By following The raw material of mass percent is made：Ethylene-vinyl acetate copolymer 20%Olefin block copolymers 15%Ethylene propylene diene rubber 45%Whiting 8%Activated zinc oxide 3%Vinyltrimethoxy silane 5%Stearic acid 1%Dual-tert-butyl dicumyl peroxide 1%Azodicarbonamide 2%.
- It is 6. according to claim 1 a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently, it is characterised in that：By with The raw material of lower mass percent is made：Ethylene-vinyl acetate copolymer 26%Olefin block copolymers 25%Ethylene propylene diene rubber 40%Whiting 2%Activated zinc oxide 1%Vinyltrimethoxy silane 2%Stearic acid 1.5%Dual-tert-butyl dicumyl peroxide 1%Azodicarbonamide 2.5%.
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| CN201710104351.0A CN106832551A (en) | 2017-02-24 | 2017-02-24 | It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently |
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| CN201710104351.0A CN106832551A (en) | 2017-02-24 | 2017-02-24 | It is a kind of to have wear-resisting and flexibility composite rubber-plastic material concurrently |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746514A (en) * | 2017-11-21 | 2018-03-02 | 王长程 | A kind of shoes for kitchener sole and preparation method thereof |
| CN109320829A (en) * | 2018-09-11 | 2019-02-12 | 杭州博源电力设备有限公司 | A kind of cable blocks and preparation method thereof |
| CN111019246A (en) * | 2019-12-31 | 2020-04-17 | 东莞市特谱峰实业有限公司 | High-elasticity wear-resistant rubber-plastic composite material and production process thereof |
| CN112029248A (en) * | 2020-09-08 | 2020-12-04 | 吴乙胜 | High-elasticity environment-friendly plastic plate and preparation process thereof |
| CN113717448A (en) * | 2020-12-17 | 2021-11-30 | 佛山市大唐新新橡塑有限公司 | Formula of wear-resistant high-elasticity rubber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102040762A (en) * | 2009-10-28 | 2011-05-04 | 晋江成昌鞋业有限公司 | Abrasion-resistant rubber and plastic composite material |
| CN106117779A (en) * | 2016-08-04 | 2016-11-16 | 晋江成昌鞋业有限公司 | A kind of ultra-soft high-elastic foamed rubber-plastic material and preparation method thereof |
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2017
- 2017-02-24 CN CN201710104351.0A patent/CN106832551A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040762A (en) * | 2009-10-28 | 2011-05-04 | 晋江成昌鞋业有限公司 | Abrasion-resistant rubber and plastic composite material |
| CN106117779A (en) * | 2016-08-04 | 2016-11-16 | 晋江成昌鞋业有限公司 | A kind of ultra-soft high-elastic foamed rubber-plastic material and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746514A (en) * | 2017-11-21 | 2018-03-02 | 王长程 | A kind of shoes for kitchener sole and preparation method thereof |
| CN109320829A (en) * | 2018-09-11 | 2019-02-12 | 杭州博源电力设备有限公司 | A kind of cable blocks and preparation method thereof |
| CN111019246A (en) * | 2019-12-31 | 2020-04-17 | 东莞市特谱峰实业有限公司 | High-elasticity wear-resistant rubber-plastic composite material and production process thereof |
| CN112029248A (en) * | 2020-09-08 | 2020-12-04 | 吴乙胜 | High-elasticity environment-friendly plastic plate and preparation process thereof |
| CN113717448A (en) * | 2020-12-17 | 2021-11-30 | 佛山市大唐新新橡塑有限公司 | Formula of wear-resistant high-elasticity rubber |
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