CN114716771A - Ethylene Propylene Diene Monomer (EPDM) rubber sucker material and preparation method thereof - Google Patents
Ethylene Propylene Diene Monomer (EPDM) rubber sucker material and preparation method thereof Download PDFInfo
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- CN114716771A CN114716771A CN202210211569.7A CN202210211569A CN114716771A CN 114716771 A CN114716771 A CN 114716771A CN 202210211569 A CN202210211569 A CN 202210211569A CN 114716771 A CN114716771 A CN 114716771A
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- diene monomer
- ethylene propylene
- propylene diene
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- 229920002943 EPDM rubber Polymers 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000006229 carbon black Substances 0.000 claims abstract description 19
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 239000000049 pigment Substances 0.000 claims abstract description 12
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 12
- 239000004902 Softening Agent Substances 0.000 claims abstract description 10
- 239000013543 active substance Substances 0.000 claims abstract description 10
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims description 23
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 claims description 2
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims description 2
- 239000012990 dithiocarbamate Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 2
- 229960002447 thiram Drugs 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 239000005662 Paraffin oil Substances 0.000 claims 1
- 239000004927 clay Substances 0.000 claims 1
- 239000002861 polymer material Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000004073 vulcanization Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920001030 Polyethylene Glycol 4000 Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- -1 ethylene, propylene Chemical group 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010690 paraffinic oil Substances 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high polymer materials, in particular to an Ethylene Propylene Diene Monomer (EPDM) sucker material and a preparation method thereof. The ethylene propylene diene monomer sucker material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 4-7 parts of active agent, 30-50 parts of alkaline modified white carbon black, 0-40 parts of filling reinforcing agent, 2-4 parts of anti-aging agent, 1-2 parts of dispersing agent, 4 parts of titanium dioxide, 1 part of pigment, 35-45 parts of softening agent, 0.5-1.5 parts of vulcanizing agent and 2-3 parts of accelerator. The rubber has excellent elasticity and flexibility by adding the alkaline modified white carbon black, so that the rubber has good market prospect.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to an Ethylene Propylene Diene Monomer (EPDM) sucker material and a preparation method thereof.
Background
Ethylene-propylene-diene monomer (EPDM) is a random copolymer elastomer obtained by solution polymerization or suspension polymerization of ethylene, propylene and a small amount of a non-conjugated diene monomer in the presence of a catalyst. Has the advantages of good ozone resistance, good heat resistance and good electrical insulation. With the continuous development of the automation industry, the demand of the sucker is continuously increased, and simultaneously, higher performance requirements such as high elasticity and high flexibility are provided for the ethylene propylene diene monomer sucker.
The ethylene propylene diene monomer rubber has excellent aging resistance and can be used in sunlight, moist and cold natural environments for a long time; the heat resistance is good, and the paint can be generally used for a long time at 150 ℃; the resistance to various polar chemicals and acid-base (except concentrated acid) is good.
Vacuum chuck, also known as vacuum sling, is one of the vacuum equipment actuators. Generally, gripping an article with a vacuum chuck is one of the least expensive methods. With the continuous development of the automation industry, the demand of the sucker is continuously increased, and simultaneously, higher performance requirements such as high elasticity and high flexibility are provided for the ethylene propylene diene monomer sucker.
Disclosure of Invention
According to the invention, the alkaline modified white carbon black is added to prepare the ethylene propylene diene monomer, so that the elasticity and flexibility of the product are greatly improved.
The invention provides an ethylene propylene diene monomer sucker material which comprises the following components in parts by weight: 80-120 parts of ethylene propylene diene monomer, 4-7 parts of activator, 30-50 parts of alkaline modified white carbon black, 0-40 parts of filling reinforcing agent, 2-4 parts of anti-aging agent, 1-2 parts of dispersant, 3-5 parts of titanium dioxide, 1-2 parts of pigment, 35-45 parts of softener, 0.5-1.5 parts of vulcanizing agent and 2-3 parts of accelerator.
Preferably, the Mooney viscosity of the ethylene propylene diene monomer is 70-80, and the ethylene content is 60-70 wt%.
Preferably, the active agent consists of zinc oxide and stearic acid.
Preferably, the basic modified white carbon black is purchased from American grade EP 18.
Preferably, the filling reinforcing agent is one or more of light calcium carbonate, white carbon black and argil.
Preferably, the anti-aging agent is anti-aging agent MB and/or anti-aging agent 445.
Preferably, the dispersant is one or more of AC617, WB212 and PEG-4000.
Preferably, the softening agent is a paraffinic oil and/or a naphthenic oil.
Preferably, the vulcanizing agent is commercially available sulfur.
Preferably, the accelerator is one or more of a thiuram accelerator, a thiazole accelerator and a dithiocarbamate accelerator.
The invention also provides a preparation method of the ethylene propylene diene monomer sucker material, which comprises the following steps:
and adding the ethylene propylene diene monomer, the activator, the alkaline modified white carbon black, the anti-aging agent, the dispersant, the titanium dioxide, the pigment, the filling reinforcing agent and the softener into an internal mixer, mixing for 15-20 minutes, discharging rubber into an open mill after mixing, adding the vulcanizing agent and the accelerator, and carrying out triangular bag three times and thin-pass mixing twice to obtain the color high-elasticity and high-flexibility ethylene propylene diene monomer rubber compound.
Further, the temperature of the rubber discharge is 120-125 ℃.
Further, the temperature of the thin-pass mixing is less than 80 ℃.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the invention, the alkaline modified white carbon black is added into the ethylene propylene diene monomer sucker material, so that the material has excellent elasticity and flexibility, and has good market prospect.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1
The embodiment provides a colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material, which is prepared by the following specific steps: 100 parts of ethylene propylene diene monomer, 6 parts of an active agent, 2 parts of an anti-aging agent, 2 parts of a dispersing agent, 4 parts of titanium dioxide, 1 part of a pigment, 38 parts of basic modified white carbon black and 38 parts of a softening agent are sequentially added into an internal mixer for mixing for 15 minutes, rubber is discharged at 120 ℃, then the mixture is added into an open mill, 1.0 part of a vulcanizing agent and 3 parts of an accelerating agent are added into the open mill at a roll temperature of less than 80 ℃ for mixing, and the colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material is obtained. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Example 2
The embodiment provides a colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material, which is prepared by the following specific steps: 100 parts of ethylene propylene diene monomer, 6 parts of active agent, 2 parts of anti-aging agent, 2 parts of dispersing agent, 4 parts of titanium dioxide, 1 part of pigment, 38 parts of white carbon black and 38 parts of softening agent are sequentially added into an internal mixer for mixing for 15 minutes, rubber is discharged at 120 ℃ and then added into an open mill, 1.0 part of vulcanizing agent and 3 parts of accelerating agent are added at the temperature of less than 80 ℃ of the open mill for mixing to obtain the colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Example 3
The embodiment provides a colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material, which is prepared by the following specific steps: 100 parts of ethylene propylene diene monomer, 6 parts of an active agent, 2 parts of an anti-aging agent, 2 parts of a dispersing agent, 4 parts of titanium dioxide, 1 part of a pigment, 38 parts of light calcium carbonate and 38 parts of a softening agent are sequentially added into an internal mixer for mixing for 15 minutes, rubber is discharged at 120 ℃ and then added into an open mill, 1.0 part of a vulcanizing agent and 3 parts of an accelerating agent are added into the open mill at the roller temperature of less than 80 ℃ for mixing to obtain the color high-elasticity and high-flexibility ethylene propylene diene monomer sucker material. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Example 4
The embodiment provides a colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material, which is prepared by the following specific steps: 80 parts of ethylene propylene diene monomer, 6 parts of active agent, 2 parts of anti-aging agent, 2 parts of dispersing agent, 4 parts of titanium dioxide, 1 part of pigment, 30 parts of alkaline modified white carbon black, 38 parts of light calcium carbonate and 38 parts of softening agent are sequentially added into an internal mixer for mixing for 20 minutes, rubber is discharged at 125 ℃, then the mixture is added into an open mill, 1.0 part of vulcanizing agent and 3 parts of accelerating agent are added at the roll temperature of the open mill being less than 80 ℃ for mixing, and the colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material is obtained. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Example 5
The embodiment provides a colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material, which is prepared by the following specific steps: 120 parts of ethylene propylene diene monomer, 6 parts of an active agent, 2 parts of an anti-aging agent, 2 parts of a dispersing agent, 4 parts of titanium dioxide, 1 part of a pigment, 50 parts of alkaline modified white carbon black, 38 parts of light calcium carbonate and 38 parts of a softening agent are sequentially added into an internal mixer for mixing for 18 minutes, rubber is discharged at 123 ℃, then the mixture is added into an open mill, 1.0 part of a vulcanizing agent and 3 parts of an accelerating agent are added at the roll temperature of the open mill being less than 80 ℃ for mixing to obtain the colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Example 6
The embodiment provides a colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material, which is prepared by the following specific steps: 110 parts of ethylene propylene diene monomer, 6 parts of an active agent, 2 parts of an anti-aging agent, 2 parts of a dispersing agent, 4 parts of titanium dioxide, 1 part of a pigment, 38 parts of light calcium carbonate and 38 parts of a softening agent are sequentially added into an internal mixer for mixing for 16 minutes, rubber is discharged at 121 ℃ and then added into an open mill, 1.0 part of a vulcanizing agent and 3 parts of an accelerating agent are added into the open mill at the roller temperature of less than 80 ℃ for mixing, and the colored high-flexibility ethylene propylene diene monomer sucking disc material is obtained. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Example 7
The comparative example provides a colored high-elasticity high-flexibility ethylene propylene diene monomer sucker material, and the specific preparation method comprises the following steps: 100 parts of ethylene propylene diene monomer, 6 parts of an active agent, 2 parts of an anti-aging agent, 2 parts of a dispersing agent, 4 parts of titanium dioxide, 1 part of a pigment, 19 parts of alkaline modified white carbon black, 19 parts of argil and 38 parts of a softening agent are sequentially added into an internal mixer for mixing for 15 minutes, rubber is discharged at 120 ℃, then the mixture is added into an open mill, 1.0 part of a vulcanizing agent and 3 parts of an accelerating agent are added at the roll temperature of the open mill being less than 80 ℃ for mixing, and the colored high-elasticity and high-flexibility ethylene propylene diene monomer sucker material is obtained. The obtained rubber compound of the color high-elasticity and high-flexibility ethylene propylene diene monomer suction cup material is placed on a flat vulcanizing machine for vulcanization at 175 ℃ per 400S, and the vulcanized sample is subjected to elasticity and flexibility tests after 6 hours.
Effect evaluation 1
As can be seen from Table 1, the hardness of the rubber materials prepared in examples 1-3 is 57-65HA, the tensile strength is 11.5-16.3MPa, the elongation at break is 562-685%, the number of flexions is 60-120 ten thousand, and the resilience is 36-56%, which shows that the rubber materials prepared by adding the alkaline modified white carbon black in the invention have excellent flexions and reboundings; the combination of comparative example 1 shows that the flexibility and resilience of the basic modified white carbon black and the argil after blending are poorer than the flexibility of the basic modified white carbon black alone.
TABLE 1 Performance testing of the ethylene propylene diene monomer in examples 1-3
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The ethylene propylene diene monomer sucker material is characterized by comprising the following components in parts by weight:
80-120 parts of ethylene propylene diene monomer, 4-7 parts of activator, 30-50 parts of alkaline modified white carbon black, 0-40 parts of filling reinforcing agent, 2-4 parts of anti-aging agent, 1-2 parts of dispersant, 3-5 parts of titanium dioxide, 1-2 parts of pigment, 35-45 parts of softener, 0.5-1.5 parts of vulcanizing agent and 2-3 parts of accelerator.
2. The ethylene propylene diene monomer suction cup material of claim 1, wherein the ethylene propylene diene monomer has a mooney viscosity of 70-80 and an ethylene content of 60-70 wt%.
3. The ethylene propylene diene monomer suction cup material of claim 1, wherein the active agent is comprised of zinc oxide and stearic acid.
4. The ethylene propylene diene monomer suction cup material of claim 1, wherein the filling reinforcing agent is one or more of light calcium carbonate, white carbon black and pottery clay.
5. The ethylene propylene diene monomer suction cup material according to claim 1, wherein the softening agent is paraffin oil and/or naphthenic oil.
6. The ethylene propylene diene monomer suction cup material of claim 1, wherein the accelerator is one or more of a thiuram type accelerator, a thiazole type accelerator, and a dithiocarbamate type accelerator.
7. A method for preparing the ethylene propylene diene monomer suction cup material as claimed in any one of claims 1 to 6, which comprises the following steps:
(1) mixing the ethylene propylene diene monomer, the activator, the alkaline modified white carbon black, the anti-aging agent, the dispersant, the titanium dioxide, the pigment, the filling reinforcing agent and the softener, and discharging rubber to obtain a mixture;
(2) and adding a vulcanizing agent and an accelerant into the mixture, and mixing to obtain the ethylene propylene diene monomer sucker material.
8. The method according to claim 7, wherein in the step (1), the gel is removed after mixing for 15 to 20 min.
9. The method as set forth in claim 7, wherein the temperature of the gel discharging in step (1) is 120-125 ℃.
10. The method of claim 7, wherein in the step (2), the temperature for mixing is less than 80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210211569.7A CN114716771A (en) | 2022-03-04 | 2022-03-04 | Ethylene Propylene Diene Monomer (EPDM) rubber sucker material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210211569.7A CN114716771A (en) | 2022-03-04 | 2022-03-04 | Ethylene Propylene Diene Monomer (EPDM) rubber sucker material and preparation method thereof |
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| CN114716771A true CN114716771A (en) | 2022-07-08 |
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| CN202210211569.7A Pending CN114716771A (en) | 2022-03-04 | 2022-03-04 | Ethylene Propylene Diene Monomer (EPDM) rubber sucker material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116874933A (en) * | 2023-06-02 | 2023-10-13 | 苏州吉尼尔机械科技有限公司 | Antistatic traceless sucker rubber material and preparation method thereof |
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| CN107216661A (en) * | 2017-07-13 | 2017-09-29 | 无锡朴业橡塑有限公司 | A kind of ageing-resistant EPT rubber composition and preparation method thereof |
| CN113121921A (en) * | 2021-04-19 | 2021-07-16 | 启东市亿方密封科技有限公司 | Combined rubber material for high-temperature-resistant sealing gasket and preparation method thereof |
| CN113754961A (en) * | 2021-08-26 | 2021-12-07 | 浙江韦氏电器有限公司 | Rubber compound, preparation method and application |
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| CN107216661A (en) * | 2017-07-13 | 2017-09-29 | 无锡朴业橡塑有限公司 | A kind of ageing-resistant EPT rubber composition and preparation method thereof |
| CN113121921A (en) * | 2021-04-19 | 2021-07-16 | 启东市亿方密封科技有限公司 | Combined rubber material for high-temperature-resistant sealing gasket and preparation method thereof |
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| CN116874933A (en) * | 2023-06-02 | 2023-10-13 | 苏州吉尼尔机械科技有限公司 | Antistatic traceless sucker rubber material and preparation method thereof |
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Application publication date: 20220708 |