CN104151721A - Rubber material for preparation of vehicle operation rod system and preparation technology thereof - Google Patents
Rubber material for preparation of vehicle operation rod system and preparation technology thereof Download PDFInfo
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- CN104151721A CN104151721A CN201410413070.XA CN201410413070A CN104151721A CN 104151721 A CN104151721 A CN 104151721A CN 201410413070 A CN201410413070 A CN 201410413070A CN 104151721 A CN104151721 A CN 104151721A
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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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention relates to a rubber material for the preparation of a vehicle operation rod system. The rubber material is composed of the following raw materials in parts by weight: 50 to 70 parts of EPDM raw rubber, 30 to 50 parts of SBR raw rubber, 5 to 10 parts of zinc oxide, 1 to 2 parts of stearic acid, 80 to 100 parts of carbon black, 10 to 20 parts of white carbon black, 1 to 2 parts of coupling agent, 30 to 40 parts of softening oil, 1 to 3 parts of activator, 1 to 3 parts of anti-aging agent, 0.5 to 1 part of sulfur, 2 to 3.5 parts of sulfuration promoter, 3 to 5 parts of peroxide vulcanizer, and 1 to 2 parts of sulfuration auxiliary agent. The invention also provides a preparation technology of the rubber material. The rubber material has a good high-low temperature circulation resistant performance and durability, and can meet the requirements of Ford standards of ESBV6R-7C453-AA and ESBV6R-7E395-AA.
Description
Technical field
The present invention relates to a kind of sizing material, specifically, is a kind of automobile-used operating lever system sizing material and preparation technology thereof.
Background technology
Have some basic physical and mechanical propertiess except requiring for automobile operating stick rubber product, be also required to meet high-low temperature resistant circulation and durability experiment requirement.
Chinese patent literature CN201310348232.1, discloses a kind of super high-and low-temperature resistance sealing member Ethylene Propylene Terpolymer glue material and preparation method thereof.But about the automobile-used operating lever system sizing material of high-low temperature resistant circulation and good endurance, yet there are no report.
Summary of the invention
The object of the invention is for deficiency of the prior art, a kind of automobile-used operating lever system sizing material is provided.
The present invention again one object is that a kind of preparation technology of above-mentioned sizing material is provided.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of automobile-used operating lever system sizing material, described sizing material is made up of the material of following weight part: 50～70 parts of EPDM rubbers, 30～50 parts of SBR rubbers, 5～10 parts, zinc oxide, 1～2 part of stearic acid, 80～100 parts of carbon blacks, 10～20 parts of White Carbon blacks, 1～2 part of coupling agent, 30～40 parts of softening oils, 1～3 part of promoting agent, 1～3 part, anti-aging agent, 0.5～1 part of Sulfur, 2～3.5 parts of vulcanization accelerators, 3～5 parts of peroxide vulcanizing agents, 1～2 part of vulcanization aid.
Described EPDM rubber is that the 3rd monomer is the ethylene-propylene diene copolymer of ENB type.
Described carbon black is made up of carbon black N330 and carbon black N550, and carbon black N330 accounts for 35～65% of carbon black total mass, and carbon black N550 accounts for 65～35% of carbon black total mass.
Described softening oil adopts the higher paraffin oil of flash-point.
Described coupling agent is silane coupling agent SI-69.
Described promoting agent is polyoxyethylene glycol PEG4000.
Described anti-aging agent is selected from anti-aging agent RD and/or antioxidant MB.
Described vulcanization accelerator is selected from accelerant B Z and/or vulkacit D PTT.
Described peroxide vulcanizing agent is crosslink agent DCP.
Described vulcanization aid is TAIC.
For realizing above-mentioned second object, the technical solution used in the present invention is:
A preparation technology for automobile-used operating lever system sizing material, comprises the following steps:
A) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, softening oil, promoting agent, the mixing A refining glue that is evenly made into of anti-aging agent;
B) A refining glue cooling, park after, add peroxide vulcanizing agent, vulcanization aid and vulcanization accelerator, more mixing evenly.
The sulfuration process of described step b) is: one step cure condition: temperature is 175 DEG C, 6～8 minutes time, pressure 15～18MPa; Post vulcanization condition: temperature is 170 DEG C, 1～1.5 hour time.
Herein, described SBR rubber has another name called styrene-butadiene rubber(SBR), by divinyl and styrene copolymerized making.The Chinese ethylidene norbornene by name of described ENB, has another name called 5-ethylidene-2-norbornene or 5-ethidine dicyclo (2,2,1) hept-2-ene".The chemical name of described silane coupling agent SI-69: two-[γ-(triethoxysilicane) propyl group] tetrasulfide, both at home and abroad the corresponding trade mark is Degussa Corporation of Si-69(Germany), union carbide corporation of the Y-6194(U.S.).The chemistry of described TAIC is by name: 1,3,5-triallyl-guanamine, 4,6-triketone, English name: Triallyl isocyanurate, CAS:[1025-15-6], molecular formula: C
12h
15n
3o
3.
The invention has the advantages that:
1, automobile-used operating lever system sizing material employing of the present invention the 3rd monomer is ethylene-propylene diene copolymer and the higher paraffin oil of flash-point of ENB type, carbon black adopts N330/N550 and uses, the sizing material making has excellent high-low temperature resistant circulation and endurance quality, can between-50～130 DEG C, use for a long time.
2, automobile-used operating lever system sizing material of the present invention meets Ford standard ESBV6R-7C453-AA, ESBV6R-7E395-AA requirement.
Embodiment
the preparation (one) of a kind of automobile-used operating lever system sizing material of embodiment 1 the present invention
A) take by weight each component: 50 parts of EPDM rubbers, 50 parts of SBR rubbers, 5 parts, zinc oxide, 2 parts of stearic acid, 30 parts of carbon black N330,50 parts of carbon black N550,20 parts of White Carbon blacks, 1 part of silane coupling agent SI-69,40 parts of paraffin oils, 1 part of PEG4000,3 parts of anti-aging agent RDs, 0.5 part of Sulfur, 2 parts of accelerant B Z, 1.5 parts of vulkacit D PTT, 3 parts of crosslink agent DCPs, 2 parts of TAIC.
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, paraffin oil, PEG4000, the mixing A refining glue that is evenly made into of anti-aging agent RD.
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.
the preparation (two) of a kind of automobile-used operating lever system sizing material of embodiment 2 the present invention
A) take by weight each component: 70 parts of EPDM rubbers, 30 parts of SBR rubbers, 10 parts, zinc oxide, 1 part of stearic acid, 40 parts of carbon black N330,60 parts of carbon black N550,10 parts of White Carbon blacks, 2 parts of silane coupling agent SI-69,30 parts of paraffin oils, 3 parts of PEG4000,1 part of antioxidant MB, 1 part of Sulfur, 1 part of accelerant B Z, 1 part of vulkacit D PTT, 5 parts of crosslink agent DCPs, 1 part of TAIC.
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, paraffin oil, PEG4000, the mixing A refining glue that is evenly made into of antioxidant MB.
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.
the preparation (three) of a kind of automobile-used operating lever system sizing material of embodiment 3 the present invention
A) take by weight each component: 60 parts of EPDM rubbers, 40 parts of SBR rubbers, 7 parts, zinc oxide, 1.5 parts of stearic acid, 40 parts of carbon black N330,50 parts of carbon black N550,15 parts of White Carbon blacks, 1.5 parts of silane coupling agent SI-69,35 parts of paraffin oils, 2 parts of PEG4000,2 parts of antioxidant MBs, 1 part of Sulfur, 2 parts of accelerant B Z, 1 part of vulkacit D PTT, 4 parts of crosslink agent DCPs, 1.5 parts of TAIC.
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, paraffin oil, PEG4000, the mixing A refining glue that is evenly made into of antioxidant MB.
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.
the preparation (four) of a kind of automobile-used operating lever system sizing material of embodiment 4 the present invention
A) take by weight each component: 50 parts of EPDM rubbers, 30 parts of SBR rubbers, 10 parts, zinc oxide, 2 parts of stearic acid, 50 parts of carbon black N330,30 parts of carbon black N550,10 parts of White Carbon blacks, 2 parts of silane coupling agent SI-69,40 parts of paraffin oils, 1 part of PEG4000,1 part of anti-aging agent RD, 1.5 parts of Sulfurs, 1.5 parts of accelerant B Z, 2 parts of vulkacit D PTT, 3 parts of crosslink agent DCPs, 1 part of TAIC.
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, paraffin oil, PEG4000, the mixing A refining glue that is evenly made into of anti-aging agent RD.
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.
the preparation (five) of a kind of automobile-used operating lever system sizing material of embodiment 5 the present invention
A) take by weight each component: 70 parts of EPDM rubbers, 50 parts of SBR rubbers, 5 parts, zinc oxide, 1 part of stearic acid, 60 parts of carbon black N330,40 parts of carbon black N550,20 parts of White Carbon blacks, 1 part of silane coupling agent SI-69,30 parts of paraffin oils, 3 parts of PEG4000,2 parts of anti-aging agent RDs, 1 part of antioxidant MB, 0.5 part of Sulfur, 1 part of accelerant B Z, 1 part of vulkacit D PTT, 5 parts of crosslink agent DCPs, 2 parts of TAIC.
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, paraffin oil, PEG4000, anti-aging agent RD, the mixing A refining glue that is evenly made into of antioxidant MB.
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.
It should be noted that, the EPDM rubber described in embodiment 1-5 is that the 3rd monomer is the ethylene-propylene diene copolymer of ENB type; In the preparation process described in embodiment 1-5, the condition of sulfuration process is: one step cure condition: temperature is 175 DEG C, 6～8 minutes time, pressure 15～18MPa; Post vulcanization condition: temperature is 170 DEG C, 1～1.5 hour time.
the performance test of a kind of automobile-used operating lever system sizing material of embodiment 6 the present invention
1. test grouping
This test has 6 groups, wherein 3 groups of test group, 3 groups of control groups.
The sizing material that test group 1 adopts embodiment 1 to prepare; The sizing material that test group 2 adopts embodiment 3 to prepare; The sizing material that test group 3 adopts embodiment 5 to prepare.
Control group 1:a) take by weight each component: 70 parts of EPDM rubbers, 50 parts of SBR rubbers, 5 parts, zinc oxide, 1 part of stearic acid, 100 parts of carbon black N330,20 parts of White Carbon blacks, 1 part of silane coupling agent SI-69,30 parts of paraffin oils, 3 parts of PEG4000,2 parts of anti-aging agent RDs, 1 part of antioxidant MB, 0.5 part of Sulfur, 1 part of accelerant B Z, 1 part of vulkacit D PTT, 5 parts of crosslink agent DCPs, 2 parts of TAIC;
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, paraffin oil, PEG4000, anti-aging agent RD, the mixing A refining glue that is evenly made into of antioxidant MB;
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.Vulcanization process condition is with embodiment 5.
Described EPDM rubber is that the 3rd monomer is the ethylene-propylene diene copolymer of ENB type.
Control group 2:a) take by weight each component: 60 parts of EPDM rubbers, 40 parts of SBR rubbers, 7 parts, zinc oxide, 1.5 parts of stearic acid, 100 parts of carbon black N550,15 parts of White Carbon blacks, 1.5 parts of silane coupling agent SI-69,35 parts of paraffin oils, 2 parts of PEG4000,2 parts of antioxidant MBs, 1 part of Sulfur, 2 parts of accelerant B Z, 1 part of vulkacit D PTT, 4 parts of crosslink agent DCPs, 1.5 parts of TAIC;
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, mineral oil, PEG4000, the mixing A refining glue that is evenly made into of antioxidant MB;
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.Vulcanization process condition is with embodiment 3.
Described EPDM rubber is that the 3rd monomer is the ethylene-propylene diene copolymer of ENB type.
Control group 3:a) take by weight each component: 70 parts of EPDM rubbers, 30 parts of SBR rubbers, 10 parts, zinc oxide, 1 part of stearic acid, 40 parts of carbon black N330,60 parts of carbon black N550,10 parts of White Carbon blacks, 2 parts of silane coupling agent SI-69,30 parts, mineral oil, 3 parts of PEG4000,1 part of antioxidant MB, 1 part of Sulfur, 1 part of accelerant B Z, 1 part of vulkacit D PTT, 5 parts of crosslink agent DCPs, 1 part of TAIC;
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, mineral oil, PEG4000, the mixing A refining glue that is evenly made into of antioxidant MB;
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.Vulcanization process condition is with embodiment 1.
Described EPDM rubber is that the 3rd monomer is the ethylene-propylene diene copolymer of ENB type.
Control group 4:a) take by weight each component: 70 parts of EPDM rubbers, 30 parts of SBR rubbers, 10 parts, zinc oxide, 1 part of stearic acid, 40 parts of carbon black N330,60 parts of carbon black N550,10 parts of White Carbon blacks, 2 parts of silane coupling agent SI-69,30 parts, mineral oil, 3 parts of PEG4000,1 part of antioxidant MB, 1 part of Sulfur, 1 part of accelerant B Z, 1 part of vulkacit D PTT, 5 parts of crosslink agent DCPs, 1 part of TAIC;
B) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, mineral oil, PEG4000, the mixing A refining glue that is evenly made into of antioxidant MB;
C) A refining glue cooling, park after, add crosslink agent DCP, TAIC, accelerant B Z and vulkacit D PTT, more mixing evenly.Vulcanization process condition is with embodiment 1.
Described EPDM rubber is that the 3rd monomer is the ethylene-propylene diene copolymer of DCPD type.
2. test method
High-low temperature resistant test: each test group and control group are placed in respectively under-20 DEG C and 100 DEG C of conditions each 1 hour, in 150 cycles, survey its changes in hardness difference.For meeting the requirement of high-low temperature resistant, the changes in hardness difference of measurement should be no more than 15 degree.
Endurance test: sizing material prepared by each test group and control group is placed in 150 DEG C of thermostatic baths 160 hours, observes that its outward appearance has or not distortion, contraction, crackle and the phenomenon such as be clamminess.In high temperature ageing test, shrinking percentage should be no more than 5%.
3. test result
| ? | Test group 1 | Test group 2 | Test group 3 | Control group 1 | Control group 2 | Control group 3 | Control group 4 |
| Changes in hardness difference | 10 | 8 | 9 | 18 | 21 | 19 | 17 |
| Appearance deformation | Nothing | Nothing | Nothing | Slight deformation | Nothing | Slight deformation | Slight deformation |
| Shrinking percentage (%) | 2 | 2 | 3 | 4 | 7 | 6 | 6 |
| Crackle | Nothing | Nothing | Nothing | Slight crackle | Nothing | Nothing | Slight crackle |
| Surfaces of tacky | Nothing | Nothing | Nothing | Nothing | Be clamminess | Be clamminess | Be clamminess |
Can be obtained by above-mentioned testing data, the present invention, by adopting the material component of different specific weight and special auxiliary agent can improve and optimize the characteristic of sizing material, makes it have excellent resistant of high or low temperature and weather resistance.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the inventive method; can also make some improvement and supplement, these improvement and the supplementary protection scope of the present invention that also should be considered as.
Claims (9)
1. an automobile-used operating lever system sizing material, is characterized in that, described sizing material is made up of the material of following weight part: 50～70 parts of EPDM rubbers, 30～50 parts of SBR rubbers, 5～10 parts, zinc oxide, 1～2 part of stearic acid, 80～100 parts of carbon blacks, 10～20 parts of White Carbon blacks, 1～2 part of coupling agent, 30～40 parts of softening oils, 1～3 part of promoting agent, 1～3 part, anti-aging agent, 0.5～1 part of Sulfur, 2～3.5 parts of vulcanization accelerators, 3～5 parts of peroxide vulcanizing agents, 1～2 part of vulcanization aid.
2. sizing material according to claim 1, is characterized in that, described EPDM rubber is that the 3rd monomer is the ethylene-propylene diene copolymer of ENB type.
3. sizing material according to claim 1, is characterized in that, described carbon black is made up of carbon black N330 and carbon black N550, and carbon black N330 accounts for 35～65% of carbon black total mass, and carbon black N550 accounts for 65～35% of carbon black total mass.
4. sizing material according to claim 1, is characterized in that, described softening oil is paraffin oil.
5. sizing material according to claim 1, is characterized in that, described coupling agent is silane coupling agent SI-69, and described promoting agent is polyoxyethylene glycol PEG4000.
6. sizing material according to claim 1, is characterized in that, described anti-aging agent is selected from anti-aging agent RD and/or antioxidant MB.
7. sizing material according to claim 1, is characterized in that, described vulcanization accelerator is selected from accelerant B Z and/or vulkacit D PTT, and described peroxide vulcanizing agent is vulcanizing agent DCP, and described vulcanization aid is TAIC.
8. the preparation technology of the arbitrary described automobile-used operating lever system sizing material of claim 1-7, is characterized in that, comprises the following steps:
A) by EPDM rubber, SBR rubber, zinc oxide, stearic acid, carbon black, White Carbon black, softening oil, promoting agent, the mixing A refining glue that is evenly made into of anti-aging agent;
B) A refining glue cooling, park after, add peroxide vulcanizing agent, vulcanization aid and vulcanization accelerator, more mixing evenly.
9. preparation technology according to claim 8, is characterized in that, the sulfuration process of step b) is: one step cure condition: temperature is 175 DEG C, 6～8 minutes time, pressure 15～18MPa; Post vulcanization condition: temperature is 170 DEG C, 1～1.5 hour time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413070.XA CN104151721A (en) | 2014-08-21 | 2014-08-21 | Rubber material for preparation of vehicle operation rod system and preparation technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413070.XA CN104151721A (en) | 2014-08-21 | 2014-08-21 | Rubber material for preparation of vehicle operation rod system and preparation technology thereof |
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| CN104151721A true CN104151721A (en) | 2014-11-19 |
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| CN201410413070.XA Pending CN104151721A (en) | 2014-08-21 | 2014-08-21 | Rubber material for preparation of vehicle operation rod system and preparation technology thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788826A (en) * | 2014-05-10 | 2015-07-22 | 安徽天彩电缆集团有限公司 | Aging-resistant EPDM rubber cable sheath material for mine |
| CN107531945A (en) * | 2015-07-30 | 2018-01-02 | 康蒂泰克传送带系统有限公司 | The conveyor belt cover of heat-resisting, flex fatigue and ozone |
| US10766703B2 (en) | 2016-06-29 | 2020-09-08 | Contitech Usa, Inc. | Conveyor belt pulley cover combining low rolling resistance with enhanced ozone resistance |
| CN112694682A (en) * | 2020-12-30 | 2021-04-23 | 上海荣南科技有限公司 | Skylight sealing strip sponge rubber material meeting public pressure change standard and extrusion process thereof |
| CN114230878A (en) * | 2021-05-31 | 2022-03-25 | 上海荣南科技股份有限公司 | NBR BUMPER sizing material for SUV automobile tail door lock system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104788826A (en) * | 2014-05-10 | 2015-07-22 | 安徽天彩电缆集团有限公司 | Aging-resistant EPDM rubber cable sheath material for mine |
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| CN107531945A (en) * | 2015-07-30 | 2018-01-02 | 康蒂泰克传送带系统有限公司 | The conveyor belt cover of heat-resisting, flex fatigue and ozone |
| CN107531945B (en) * | 2015-07-30 | 2021-07-30 | 康蒂泰克传送带系统有限公司 | Conveyor belt coverings resistant to heat, flex fatigue, and ozone |
| US10766703B2 (en) | 2016-06-29 | 2020-09-08 | Contitech Usa, Inc. | Conveyor belt pulley cover combining low rolling resistance with enhanced ozone resistance |
| CN112694682A (en) * | 2020-12-30 | 2021-04-23 | 上海荣南科技有限公司 | Skylight sealing strip sponge rubber material meeting public pressure change standard and extrusion process thereof |
| CN114230878A (en) * | 2021-05-31 | 2022-03-25 | 上海荣南科技股份有限公司 | NBR BUMPER sizing material for SUV automobile tail door lock system |
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Application publication date: 20141119 |