CN109627531B - Sealing gasket for valve without cracking easily - Google Patents
Sealing gasket for valve without cracking easily Download PDFInfo
- Publication number
- CN109627531B CN109627531B CN201811489174.3A CN201811489174A CN109627531B CN 109627531 B CN109627531 B CN 109627531B CN 201811489174 A CN201811489174 A CN 201811489174A CN 109627531 B CN109627531 B CN 109627531B
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- parts
- degraded
- valve
- polyethylene wax
- polytetrafluoroethylene compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 14
- 238000005336 cracking Methods 0.000 title claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 56
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 45
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 45
- 150000001875 compounds Chemical class 0.000 claims abstract description 31
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000004014 plasticizer Substances 0.000 claims abstract description 15
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000004698 Polyethylene Substances 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 10
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 10
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims abstract description 9
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229960002447 thiram Drugs 0.000 claims abstract description 9
- 238000007872 degassing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011787 zinc oxide Substances 0.000 claims abstract description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 240000000491 Corchorus aestuans Species 0.000 claims description 10
- 235000011777 Corchorus aestuans Nutrition 0.000 claims description 10
- 235000010862 Corchorus capsularis Nutrition 0.000 claims description 10
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 10
- 229910000278 bentonite Inorganic materials 0.000 claims description 10
- 239000000440 bentonite Substances 0.000 claims description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 10
- 239000002041 carbon nanotube Substances 0.000 claims description 10
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 10
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 10
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 10
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 10
- 239000011297 pine tar Substances 0.000 claims description 10
- 229940068124 pine tar Drugs 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims 1
- 239000000945 filler Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08L11/00—Compositions of homopolymers or copolymers of chloroprene
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
-
- 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
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
-
- 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
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a sealing gasket which is not easy to crack and used for a valve, which comprises the following raw materials in parts by weight: 80-120 parts of chloroprene rubber, 40-60 parts of butadiene rubber, 1-2 parts of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 80-100 parts of filling reinforcing agent, 2-4 parts of zinc oxide, 3-4 parts of degraded polytetrafluoroethylene compound, 5-10 parts of plasticizer, 1.5-2.5 parts of tert-butyl hydroperoxide, 1-1.6 parts of tetramethyl thiuram disulfide, 0.6-1.8 parts of trimethylolpropane trimethacrylate, 341.5-2.5 parts of anti-aging agent DFC and 1-1.6 parts of anti-aging agent ODA. The degraded polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on the polytetrafluoroethylene resin, exhausting air, degassing, crushing, adding polyethylene wax, and stirring to obtain the degraded polytetrafluoroethylene compound. The sealing gasket for the valve, provided by the invention, is not easy to crack and is wear-resistant.
Description
Technical Field
The invention relates to the technical field of valve sealing gaskets, in particular to a sealing gasket which is not easy to crack and used for a valve.
Background
The valve is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, has the important sealing performance of the valve, can be used for separating liquid or gas, and is very wide in application.
At present, some seal gaskets for valves on the market are easy to crack, easy to leak, influence the sealing effect, have low safety performance and influence the service life of the valve.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a sealing gasket for a valve, which is not easy to crack, has balanced properties, and is not easy to crack and resistant to abrasion.
The invention provides a sealing gasket which is not easy to crack and used for a valve, which comprises the following raw materials in parts by weight: 80-120 parts of chloroprene rubber, 40-60 parts of butadiene rubber, 1-2 parts of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 80-100 parts of filling reinforcing agent, 2-4 parts of zinc oxide, 3-4 parts of degraded polytetrafluoroethylene compound, 5-10 parts of plasticizer, 1.5-2.5 parts of tert-butyl hydroperoxide, 1-1.6 parts of tetramethyl thiuram disulfide, 0.6-1.8 parts of trimethylolpropane trimethacrylate, 341.5-2.5 parts of anti-aging agent DFC and 1-1.6 parts of anti-aging agent ODA.
Preferably, the filling reinforcement comprises: jute fiber, heavy calcium carbonate, bentonite, carbon nano tube and fly ash.
Preferably, the weight ratio of the jute fiber, the heavy calcium carbonate, the bentonite, the carbon nano tube and the fly ash is 15-25: 10-20: 25-35: 20-40: 25-45.
Preferably, the plasticizer comprises: dibutyl tin dilaurate, pine tar and oxidized polyethylene wax.
Preferably, the weight ratio of the dibutyltin dilaurate to the pine tar to the oxidized polyethylene wax is 2-4: 1-2: 2-4.
Preferably, the degraded polytetrafluoroethylene composite is prepared by adopting the following process: and (3) carrying out irradiation degradation on the polytetrafluoroethylene resin, exhausting air, degassing, crushing, adding polyethylene wax, and stirring to obtain the degraded polytetrafluoroethylene compound.
Preferably, in the preparation process of the degraded polytetrafluoroethylene compound, the irradiation dose is 0.8-0.86 MGy.
Preferably, in the preparation process of the degraded polytetrafluoroethylene composite, the degraded polytetrafluoroethylene composite is crushed to have the particle size of 4-8 μm.
Preferably, in the preparation process of the degraded polytetrafluoroethylene compound, the weight ratio of the polytetrafluoroethylene resin to the polyethylene wax is 20-30: 30-40.
According to the invention, jute fibers, heavy calcium carbonate, bentonite, carbon nanotubes and fly ash are compounded as the filler, and under the coordination of a degraded polytetrafluoroethylene compound, the filler has extremely high mutual dispersion degree and can be effectively coated on the surface of the filler, so that the uniform mixing degree of the filler in chloroprene rubber and butadiene rubber is effectively enhanced; meanwhile, the degradable polytetrafluoroethylene compound is matched with dibutyltin dilaurate, pine tar and oxidized polyethylene wax to act, so that the molecular chains of chloroprene rubber and butadiene rubber can be promoted to be wound, the mutual binding force is strong, the toughness is good, and the tert-butyl hydroperoxide, tetramethyl thiuram disulfide and trimethylolpropane trimethacrylate are cooperatively vulcanized, cured and crosslinked, so that the wear-resistant rubber is not easy to crack and is wear-resistant.
In the degraded polytetrafluoroethylene compound, polytetrafluoroethylene is subjected to irradiation degradation and then ground to form tiny particles with active groups on the surface, and the tiny particles can be wrapped on the surface of polyethylene wax.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The utility model provides a difficult fracture seal gasket for valve, its raw materials include: 80kg of chloroprene rubber, 60kg of butadiene rubber, 1kg of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 100kg of filling reinforcing agent, 2kg of zinc oxide, 4kg of degraded polytetrafluoroethylene compound, 5kg of plasticizer, 2.5kg of tert-butyl hydroperoxide, 1kg of tetramethyl thiuram disulfide, 1.8kg of trimethylolpropane trimethacrylate, 341.5 kg of anti-aging agent DFC-341.5 kg and 1.6kg of anti-aging agent ODA.
The filling reinforcing agent is prepared from jute fiber, heavy calcium carbonate, bentonite, carbon nano tubes and fly ash according to the weight ratio of 15: 20: 25: 40: 25. The plasticizer is prepared from dibutyltin dilaurate, pine tar and oxidized polyethylene wax according to a weight ratio of 4: 1: 4.
The degraded polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on 20kg of polytetrafluoroethylene resin with the irradiation dose of 0.86MGy, exhausting air and degassing, crushing to obtain particles with the particle size of 4-8 microns, adding 30kg of polyethylene wax, and stirring for 65min at the stirring speed of 800r/min to obtain the degraded polytetrafluoroethylene compound.
Example 2
The utility model provides a difficult fracture seal gasket for valve, its raw materials include: 120kg of chloroprene rubber, 40kg of butadiene rubber, 2kg of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 80kg of filling reinforcing agent, 4kg of zinc oxide, 3kg of degraded polytetrafluoroethylene compound, 10kg of plasticizer, 1.5kg of tert-butyl hydroperoxide, 1.6kg of tetramethyl thiuram disulfide, 0.6kg of trimethylolpropane trimethacrylate, 342.5 kg of anti-aging agent DFC and 1kg of anti-aging agent ODA.
The filling reinforcing agent is prepared from jute fiber, heavy calcium carbonate, bentonite, carbon nano tubes and fly ash in a weight ratio of 25: 10: 35: 20: 45, respectively. The plasticizer is prepared from dibutyltin dilaurate, pine tar and oxidized polyethylene wax according to the weight ratio of 2: 2: 2.
The degraded polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on 30kg of polytetrafluoroethylene resin with the irradiation dose of 0.8MGy, exhausting air and degassing, crushing to obtain particles with the particle size of 4-8 microns, adding 40kg of polyethylene wax, and stirring for 45min at the stirring speed of 1000r/min to obtain the degraded polytetrafluoroethylene compound.
Example 3
The utility model provides a difficult fracture seal gasket for valve, its raw materials include: 90kg of chloroprene rubber, 55kg of butadiene rubber, 1.3kg of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 95kg of filling reinforcing agent, 2.5kg of zinc oxide, 3.7kg of degraded polytetrafluoroethylene compound, 6kg of plasticizer, 2.2kg of tert-butyl hydroperoxide, 1.2kg of tetramethyl thiuram disulfide, 1.4kg of trimethylolpropane trimethacrylate, 1.4kg of anti-aging agent DFC-341.8 kg and 1.4kg of anti-aging agent ODA.
The filling reinforcing agent is prepared from jute fiber, heavy calcium carbonate, bentonite, carbon nano tubes and fly ash in a weight ratio of 18: 18: 28: 35: 30. The plasticizer is prepared from dibutyltin dilaurate, pine tar and oxidized polyethylene wax according to the weight ratio of 3.5: 1.3: 3.5.
The degraded polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on 22kg of polytetrafluoroethylene resin with the irradiation dose of 0.84MGy, exhausting air and degassing, crushing to obtain particles with the particle size of 4-8 microns, adding 33kg of polyethylene wax, and stirring for 60min at the stirring speed of 850r/min to obtain the degraded polytetrafluoroethylene compound.
Example 4
The utility model provides a difficult fracture seal gasket for valve, its raw materials include: 110kg of chloroprene rubber, 45kg of butadiene rubber, 1.7kg of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 85kg of filling reinforcing agent, 3.5kg of zinc oxide, 3.3kg of degraded polytetrafluoroethylene compound, 8kg of plasticizer, 1.8kg of tert-butyl hydroperoxide, 1.4kg of tetramethyl thiuram disulfide, 1kg of trimethylolpropane trimethacrylate, 1.2kg of anti-aging agent DFC-342.2 kg and 1.2kg of anti-aging agent ODA.
The filling reinforcing agent is prepared from jute fiber, heavy calcium carbonate, bentonite, carbon nano tubes and fly ash in a weight ratio of 22: 12: 32: 25: 40. The plasticizer is prepared from dibutyltin dilaurate, pine tar and oxidized polyethylene wax according to the weight ratio of 2.5: 1.7: 2.5.
The degraded polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on 28kg of polytetrafluoroethylene resin with the irradiation dose of 0.82MGy, exhausting air and degassing, crushing to obtain particles with the particle size of 4-8 microns, adding 37kg of polyethylene wax, and stirring for 50min at the stirring speed of 950r/min to obtain the degraded polytetrafluoroethylene compound.
Example 5
The utility model provides a difficult fracture seal gasket for valve, its raw materials include: 100kg of chloroprene rubber, 50kg of butadiene rubber, 1.5kg of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 90kg of filling reinforcing agent, 3kg of zinc oxide, 3.5kg of degraded polytetrafluoroethylene compound, 7kg of plasticizer, 2kg of tert-butyl hydroperoxide, 1.3kg of tetramethyl thiuram disulfide, 1.2kg of trimethylolpropane trimethacrylate, 1.342 kg of anti-aging agent DFC and 1.3kg of anti-aging agent ODA.
The filling reinforcing agent is prepared from jute fiber, heavy calcium carbonate, bentonite, carbon nano tubes and fly ash in a weight ratio of 20: 15: 30: 30: 35. The plasticizer is prepared from dibutyltin dilaurate, pine tar and oxidized polyethylene wax according to the weight ratio of 3: 1.5: 3, and (3).
The degraded polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on 25kg of polytetrafluoroethylene resin with the irradiation dose of 0.83MGy, exhausting air and degassing, crushing to obtain particles with the particle size of 4-8 microns, adding 35kg of polyethylene wax, and stirring for 55min at the stirring speed of 900r/min to obtain the degraded polytetrafluoroethylene compound.
The sealing gasket for the valve, which is obtained in example 5, can be bent and twisted at will without cracking, and completely meets the use requirements (particularly low-temperature torsion resistance) of the sealing gasket, the impact elasticity is 56%, the Akron abrasion is 0.55%, the elongation is 468%, the tensile strength is 34.1MPa, and the elongation is 765%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The sealing gasket which is not easy to crack for the valve is characterized by comprising the following raw materials in parts by weight: 80-120 parts of chloroprene rubber, 40-60 parts of butadiene rubber, 1-2 parts of beta- (3, 4-epoxycyclohexyl) ethyl trimethoxy silane, 80-100 parts of filling reinforcing agent, 2-4 parts of zinc oxide, 3-4 parts of degraded polytetrafluoroethylene compound, 5-10 parts of plasticizer, 1.5-2.5 parts of tert-butyl hydroperoxide, 1-1.6 parts of tetramethyl thiuram disulfide, 0.6-1.8 parts of trimethylolpropane trimethacrylate, 341.5-2.5 parts of anti-aging agent DFC and 1-1.6 parts of anti-aging agent ODA;
wherein, fill reinforcing agent includes: jute fiber, heavy calcium carbonate, bentonite, carbon nano tube and fly ash;
wherein the weight ratio of the jute fiber, the heavy calcium carbonate, the bentonite, the carbon nano tube and the fly ash is 15-25: 10-20: 25-35: 20-40: 25-45 parts of;
the degradable polytetrafluoroethylene compound is prepared by adopting the following process: and (3) carrying out irradiation degradation on the polytetrafluoroethylene resin, exhausting air, degassing, crushing, adding polyethylene wax, and stirring to obtain the degraded polytetrafluoroethylene compound.
2. A non-frangible seal for a valve according to claim 1 wherein the plasticizer comprises: dibutyl tin dilaurate, pine tar and oxidized polyethylene wax.
3. The non-cracking seal gasket for a valve according to claim 2, wherein the weight ratio of dibutyltin dilaurate, pine tar and oxidized polyethylene wax is 2-4: 1-2: 2-4.
4. The non-cracking gasket seal for valve according to claim 1, wherein the irradiation dose in the preparation process of the degraded polytetrafluoroethylene compound is 0.8-0.86 MGy.
5. A non-cracking seal gasket for a valve according to claim 1 or 4, wherein the degraded polytetrafluoroethylene compound is prepared by pulverizing to a particle size of 4 to 8 μm.
6. The sealing gasket for a valve, which is not prone to cracking according to claim 1, wherein in the preparation process of the degraded polytetrafluoroethylene compound, the weight ratio of the polytetrafluoroethylene resin to the polyethylene wax is 20-30: 30-40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811489174.3A CN109627531B (en) | 2018-12-06 | 2018-12-06 | Sealing gasket for valve without cracking easily |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811489174.3A CN109627531B (en) | 2018-12-06 | 2018-12-06 | Sealing gasket for valve without cracking easily |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109627531A CN109627531A (en) | 2019-04-16 |
| CN109627531B true CN109627531B (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811489174.3A Expired - Fee Related CN109627531B (en) | 2018-12-06 | 2018-12-06 | Sealing gasket for valve without cracking easily |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109627531B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101426880A (en) * | 2005-03-17 | 2009-05-06 | 陶氏环球技术公司 | Cap liners, closures and gaskets made from multi-block polymers |
| CN101580606A (en) * | 2009-06-08 | 2009-11-18 | 无锡市华美电缆有限公司 | Cable jacket rubber and preparation method |
| CN102212221A (en) * | 2010-04-06 | 2011-10-12 | 苏州诺升功能高分子材料有限公司 | Polytetrafluoroethylene-modified polyethylene wax with core-shell structure and preparation process thereof |
| CN102993517A (en) * | 2012-11-01 | 2013-03-27 | 安徽荣达阀门有限公司 | Chloroprene rubber gasket with high abrasion resistance and preparation method thereof |
-
2018
- 2018-12-06 CN CN201811489174.3A patent/CN109627531B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101426880A (en) * | 2005-03-17 | 2009-05-06 | 陶氏环球技术公司 | Cap liners, closures and gaskets made from multi-block polymers |
| CN101580606A (en) * | 2009-06-08 | 2009-11-18 | 无锡市华美电缆有限公司 | Cable jacket rubber and preparation method |
| CN102212221A (en) * | 2010-04-06 | 2011-10-12 | 苏州诺升功能高分子材料有限公司 | Polytetrafluoroethylene-modified polyethylene wax with core-shell structure and preparation process thereof |
| CN102993517A (en) * | 2012-11-01 | 2013-03-27 | 安徽荣达阀门有限公司 | Chloroprene rubber gasket with high abrasion resistance and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109627531A (en) | 2019-04-16 |
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