CN110128768A - A kind of polytetrafluoroethylene sealing gasket piece - Google Patents
A kind of polytetrafluoroethylene sealing gasket piece Download PDFInfo
- Publication number
- CN110128768A CN110128768A CN201910332479.1A CN201910332479A CN110128768A CN 110128768 A CN110128768 A CN 110128768A CN 201910332479 A CN201910332479 A CN 201910332479A CN 110128768 A CN110128768 A CN 110128768A
- Authority
- CN
- China
- Prior art keywords
- polytetrafluoroethylene
- sealing gasket
- plasticizer
- parts
- auxiliary agent
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions 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; Compositions of derivatives of such polymers
- C08L27/02—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- 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)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of polytetrafluoroethylene sealing gasket pieces, which includes following components according to the mass fraction: polytetrafluoroethylene (PTFE): 70-100 parts, plasticizer: and 30-50 parts, auxiliary agent: 0.5-1 parts；Wherein, plasticizer is the mixture of silicon powder, polyphenylene sulfide and polyether-ether-ketone, in mass ratio meter silicon powder: polyphenylene sulfide: polyether-ether-ketone=70:10:20；Auxiliary agent is calcium zinc stabilizer；The gasket that should fall overcomes compression stress, improves the heat resisting and pressure resisting performance of gasket, and the method for preparing the gasket is simple, process conditions are easily controllable, low in cost.
Description
Technical field
The present invention relates to a kind of gasket seals, and in particular to a kind of polytetrafluoroethylene sealing gasket piece.
Background technique
With the rapid economic development in our country, demand of the people to plastic products is continuously improved, polytetrafluoroethylene sealing gasket
Piece is increasingly becoming the first choice of pipe sealing gasket.Due to its characteristic resistant to high temperature, become undisputed King.But at present
Most polytetrafluoroethylene sealing gasket piece has " cold flow properties ".I.e. material product occurs under the effect of long-time continuous load
It is plastically deformed (creep), this brings certain limitation to its application.Such as when PTFE is used as gasket, to seal tightly and handle
Bolt is twisted very tight, so that washer can be made to generate " cold flow " (creep) and be crushed, limited when being more than specific compression stress
Its industrial application, therefore develop a kind of meaning of the teflon gasket with reality.
Summary of the invention
The technical problem to be solved by the present invention is to propose a kind of polytetrafluoro for the above disadvantage of the existing technology
Ethylene gasket seal, the gasket that should fall overcome compression stress, improve the heat resisting and pressure resisting performance of gasket, and prepare the side of the gasket
Method is simple, and process conditions are easily controllable, low in cost.
The technical solution that the present invention solves the above technical problem is:
A kind of polytetrafluoroethylene sealing gasket piece, which includes following components according to the mass fraction:
Polytetrafluoroethylene (PTFE): 70-100 parts, plasticizer: 30-50 parts, auxiliary agent: 0.5-1 parts；
Wherein, plasticizer is the mixture of silicon powder, polyphenylene sulfide and polyether-ether-ketone, in mass ratio meter silicon powder: polyphenylene sulfide:
Polyether-ether-ketone=70:10:20；
Auxiliary agent is calcium zinc stabilizer.
The technical solution that the present invention further limits are as follows:
In aforementioned polytetrafluoroethylene sealing gasket piece, the degree of polymerization of polytetrafluoroethylene (PTFE) is 104。
In aforementioned polytetrafluoroethylene sealing gasket piece, the preparation method of the gasket seal specifically includes the following steps:
(1) polytetrafluoroethylene (PTFE), plasticizer, auxiliary agent are added in blender, are sufficiently stirred to obtain pre- ingredient；
(2) the pre- ingredient for obtaining step (1) is squeezed under the conditions of 150-200 DEG C, melt pressure 1.9-3MPa by twin-screw
Machine melting extrusion out, pressing mold is up to polytetrafluoroethylene sealing gasket piece.
In aforementioned polytetrafluoroethylene sealing gasket piece, mixing speed is 1200-1800 revs/min in step (1), mixing time
It is 10-30 minutes.
In aforementioned polytetrafluoroethylene sealing gasket piece, temperature is 170-200 DEG C in step (2).
The beneficial effects of the present invention are:
Fire and high pressure resistant Teflon gasket material of the invention, by the way that heat-resisting, durable ring is added in polytetrafluoroethylene (PTFE)
Protect plasticizer: silicon powder, polyphenylene sulfide, polyether-ether-ketone improve the softening temperature of gasket material, and normal condition softening temperature exists
350 degree of present invention can achieve 450 degree of -500 degree, improve pressure resistance, normally be pressed in 3Mpa product of the present invention with money gasket is resistance to
Energy pressure resistance 4Mpa, overcomes compression stress, and the method for preparing the gasket material is simple, and process conditions are easily controllable, is suitble to
Large-scale promotion uses.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of polytetrafluoroethylene sealing gasket pieces, which includes following components according to the mass fraction:
Polytetrafluoroethylene (PTFE): 100 parts, plasticizer: 50 parts, auxiliary agent: 1 part；
Wherein, plasticizer is the mixture of silicon powder, polyphenylene sulfide and polyether-ether-ketone, in mass ratio meter silicon powder: polyphenylene sulfide:
Polyether-ether-ketone=70:10:20；
Auxiliary agent is calcium zinc stabilizer.
In the present embodiment: the degree of polymerization of polytetrafluoroethylene (PTFE) is 104。
The preparation method of above-mentioned gasket seal specifically includes the following steps:
(1) polytetrafluoroethylene (PTFE), plasticizer, auxiliary agent are added in blender, 10 points is sufficiently stirred under 1800 revs/min of speed
Clock obtains pre- ingredient；
(2) the pre- ingredient for obtaining step (1) is melted under the conditions of 160 DEG C, melt pressure 3MPa by double screw extruder
It squeezes out, pressing mold is up to polytetrafluoroethylene sealing gasket piece.
Embodiment 2
The present embodiment provides a kind of polytetrafluoroethylene sealing gasket pieces, which includes following components according to the mass fraction:
Polytetrafluoroethylene (PTFE): 70 parts, plasticizer: 30 parts, auxiliary agent: 0.5 part；
Wherein, plasticizer is the mixture of silicon powder, polyphenylene sulfide and polyether-ether-ketone, in mass ratio meter silicon powder: polyphenylene sulfide:
Polyether-ether-ketone=70:10:20；
Auxiliary agent is calcium zinc stabilizer.
In the present embodiment, the degree of polymerization of polytetrafluoroethylene (PTFE) is 104。
The preparation method of above-mentioned gasket seal specifically includes the following steps:
(1) polytetrafluoroethylene (PTFE), plasticizer, auxiliary agent are added in blender, mixing speed is 1200 revs/min, mixing time
It is 30 minutes, is sufficiently stirred to obtain pre- ingredient；
(2) the pre- ingredient for obtaining step (1) is molten by double screw extruder under the conditions of 200 DEG C, melt pressure 1.9MPa
Melt extrusion, pressing mold is up to polytetrafluoroethylene sealing gasket piece.
Embodiment 3
The present embodiment provides a kind of polytetrafluoroethylene sealing gasket pieces, which includes following components according to the mass fraction:
Polytetrafluoroethylene (PTFE): 70-100 parts, plasticizer: 30-50 parts, auxiliary agent: 0.5-1 parts；
Wherein, plasticizer is the mixture of silicon powder, polyphenylene sulfide and polyether-ether-ketone, in mass ratio meter silicon powder: polyphenylene sulfide:
Polyether-ether-ketone=70:10:20；
Auxiliary agent is calcium zinc stabilizer.
In the present embodiment, the degree of polymerization of polytetrafluoroethylene (PTFE) is 104。
The preparation method of above-mentioned gasket seal specifically includes the following steps:
(1) polytetrafluoroethylene (PTFE), plasticizer, auxiliary agent are added in blender, mixing speed is 1500 revs/min, mixing time
It is 200 minutes, is sufficiently stirred to obtain pre- ingredient；
(2) the pre- ingredient for obtaining step (1) is molten by double screw extruder under the conditions of 170 DEG C, melt pressure 2.2MPa
Melt extrusion, pressing mold is up to polytetrafluoroethylene sealing gasket piece.
The present invention is overcome the deficiencies in the prior art, proposes a kind of teflon gasket seal formula, is changed
The deficiency of original formula, overcomes compression stress, improves the heat resisting and pressure resisting performance of gasket.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (5)
1. a kind of polytetrafluoroethylene sealing gasket piece, which is characterized in that the gasket seal includes following components according to the mass fraction:
Polytetrafluoroethylene (PTFE): 70-100 parts, plasticizer: 30-50 parts, auxiliary agent: 0.5-1 parts；
Wherein, the plasticizer is the mixture of silicon powder, polyphenylene sulfide and polyether-ether-ketone, in mass ratio meter silicon powder: poly-
Diphenyl sulfide: polyether-ether-ketone=70:10:20；
The auxiliary agent is calcium zinc stabilizer.
2. polytetrafluoroethylene sealing gasket piece according to claim 1, it is characterised in that: the degree of polymerization of the polytetrafluoroethylene (PTFE)
It is 104。
3. polytetrafluoroethylene sealing gasket piece according to claim 2, it is characterised in that: the preparation method of the gasket seal has
Body the following steps are included:
(1) polytetrafluoroethylene (PTFE), plasticizer, auxiliary agent are added in blender, are sufficiently stirred to obtain pre- ingredient；
(2) the pre- ingredient for obtaining step (1) is squeezed under the conditions of 150-200 DEG C, melt pressure 1.9-3MPa by twin-screw
Machine melting extrusion out, pressing mold is up to polytetrafluoroethylene sealing gasket piece.
4. polytetrafluoroethylene sealing gasket piece according to claim 3, it is characterised in that: mixing speed in the step (1)
It is 1200-1800 revs/min, mixing time is 10-30 minutes.
5. polytetrafluoroethylene sealing gasket piece according to claim 3, it is characterised in that: temperature is in the step (2)
170-200℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910332479.1A CN110128768A (en) | 2019-04-24 | 2019-04-24 | A kind of polytetrafluoroethylene sealing gasket piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910332479.1A CN110128768A (en) | 2019-04-24 | 2019-04-24 | A kind of polytetrafluoroethylene sealing gasket piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110128768A true CN110128768A (en) | 2019-08-16 |
Family
ID=67571128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910332479.1A Pending CN110128768A (en) | 2019-04-24 | 2019-04-24 | A kind of polytetrafluoroethylene sealing gasket piece |
Country Status (1)
| Country | Link |
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| CN (1) | CN110128768A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001040225A (en) * | 1999-07-27 | 2001-02-13 | Oiles Ind Co Ltd | Heat-resistant resin composition for sliding member |
| CN101775186A (en) * | 2010-02-01 | 2010-07-14 | 南京肯特新材料有限公司 | Polytetrafluoroethylene composite material and product preparation method thereof |
| CN101942162A (en) * | 2009-06-18 | 2011-01-12 | 日立电线精密技术株式会社 | Modified fluorocarbon resin composition and molded products |
| CN102627820A (en) * | 2011-08-18 | 2012-08-08 | 天津市天塑科技集团有限公司技术中心 | Modified teflon material for dynamic/static seal |
| CN102719042A (en) * | 2012-06-19 | 2012-10-10 | 天津市天塑科技集团有限公司技术中心 | Self-lubrication wear-resistant modified PTFE (Poly Tetra Fluoro Ethylene) sealing material |
| CN105061956A (en) * | 2015-07-30 | 2015-11-18 | 洛阳轴研科技股份有限公司 | Polyether-ether-ketone modified polytetrafluoroethylene composite material, bearing retainer and making method of bearing retainer |
-
2019
- 2019-04-24 CN CN201910332479.1A patent/CN110128768A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001040225A (en) * | 1999-07-27 | 2001-02-13 | Oiles Ind Co Ltd | Heat-resistant resin composition for sliding member |
| CN101942162A (en) * | 2009-06-18 | 2011-01-12 | 日立电线精密技术株式会社 | Modified fluorocarbon resin composition and molded products |
| CN101775186A (en) * | 2010-02-01 | 2010-07-14 | 南京肯特新材料有限公司 | Polytetrafluoroethylene composite material and product preparation method thereof |
| CN102627820A (en) * | 2011-08-18 | 2012-08-08 | 天津市天塑科技集团有限公司技术中心 | Modified teflon material for dynamic/static seal |
| CN102719042A (en) * | 2012-06-19 | 2012-10-10 | 天津市天塑科技集团有限公司技术中心 | Self-lubrication wear-resistant modified PTFE (Poly Tetra Fluoro Ethylene) sealing material |
| CN105061956A (en) * | 2015-07-30 | 2015-11-18 | 洛阳轴研科技股份有限公司 | Polyether-ether-ketone modified polytetrafluoroethylene composite material, bearing retainer and making method of bearing retainer |
Non-Patent Citations (2)
| Title |
|---|
| 孔萍等: "《塑料材料》", 31 July 2017, 广东高等教育出版社 * |
| 胡隆伟: "《紧固件材料手册》", 31 December 2014, 中国宇航出版社 * |
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Application publication date: 20190816 |
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