CN108440879A - High temperature pressurised ptfe composite and products thereof manufacturing process and ring pads - Google Patents
High temperature pressurised ptfe composite and products thereof manufacturing process and ring pads Download PDFInfo
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- CN108440879A CN108440879A CN201810183567.5A CN201810183567A CN108440879A CN 108440879 A CN108440879 A CN 108440879A CN 201810183567 A CN201810183567 A CN 201810183567A CN 108440879 A CN108440879 A CN 108440879A
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
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- 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 kind of high temperature pressurised ptfe composite and products thereof manufacturing process and ring pads, it solves when the liquid or excessively high gas temperature that valve internal conveys, polytetrafluoroethylene (PTFE) is easy the problem of softening, influencing the sealing effect of valve, its key points of the technical solution are that:A kind of high temperature pressurised ptfe composite, agitated, pressing are sintered, are calculated in mass percent, are made of following raw material：5 ~ 12% carbon fiber, 3 ~ 8% molybdenum disulfide, 0.5 ~ 2.0% metal promoter, 1 ~ 3% glass fibre, surplus are polytetrafluoroethylene (PTFE)；Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) take grain size in the raw material powder of 1,000 5000 mesh by sieve screening, have preferable high-temperature resistant result.
Description
Technical field
The present invention relates to valve body seal, more particularly to a kind of high temperature pressurised ptfe composite and its preparation side
Method.
Background technology
In industrial processes, valve is widely used in various pipe-line systems, and the wherein sealing problem of valve, gradually
Cause the concern and attention of people, medium may be used also once External leakage accident occurs in addition to causing larger economic loss
Personal safety can seriously be injured.Valve stem packing sealing performance is one of the leading indicator of valve overall performance, material it is close
Envelope property quality determines whether valve has external leakage.
Polytetrafluoroethylene (PTFE) is the excellent engineering plastics such as a kind of corrosion resistant, anti-aging, friction coefficient, is suitable in valve seal
The application of Material Field.But there are the distinct disadvantages such as easy softening at high temperature for polytetrafluoroethylene (PTFE).Currently, by pure polytetrafluoroethylene (PTFE)
The tolerable temperature that manufactured sealing material can be born is 220 DEG C.When the liquid or gas temperature of valve internal conveying are excessively high
When, polytetrafluoroethylene (PTFE) is easy softening, influences the sealing effect of valve.
Invention content
The first purpose of the invention is to provide a kind of high temperature pressurised ptfe composites, have preferable resistance to height
Temp effect.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of high temperature pressurised ptfe composite, agitated, pressing are sintered, are calculated in mass percent, by following
Raw material forms：5~12% carbon fiber, 3~8% molybdenum disulfide, 0.5~2.0% metal promoter, 1~3% glass fibers
Dimension, surplus are polytetrafluoroethylene (PTFE)；
Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) take grain size in 1000- by sieve screening
The raw material powder of 5000 mesh.
Preferably, a kind of high temperature pressurised ptfe composite, agitated, pressing is sintered, with quality hundred
Score meter, is made of following raw material：8% carbon fiber, 6% molybdenum disulfide, 1% metal promoter, 2% glass fibre,
83% polytetrafluoroethylene (PTFE)；
Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) take grain size in 2500- by sieve screening
The grain size of the raw material powder of 5000 mesh, glass fibre is chosen between 1000-2500 mesh.
By using above-mentioned technical proposal, carbon fiber can improve the physical property of polytetrafluoroethylene (PTFE), mechanical property and resistance to
Polishing machine improves the hardness and compression strength of composite material, meanwhile, carbon fiber has the characteristics that heat safe, raising composite wood
The heat resistance of material；Molybdenum disulfide is a kind of inorganic compound with diamagnetism and with semiconducting behavior, with polytetrafluoroethyl-ne
The compound antiwear and friction reduction property that can improve composite material of alkene, under said components proportioning, molybdenum disulfide is compound with carbon fiber, drop
Frictional force between low composite material mixed process median surface improves the combination effect between raw material powder；Metal promoter is compared
There is preferable heat-conducting effect in non-metallic resin, the thermal coefficient of composite material can be improved, meanwhile, metal promoter can rise
To the effect for reducing system viscosity, the lubricity of system in whipping process is improved, moreover, the fusing point of metal is higher than polytetrafluoroethyl-ne
The softening point of alkene is dispersed in by metal promoter in the mixed system of carbon fiber and polytetrafluoroethylene (PTFE), can be common with carbon fiber
As enhancing skeleton, the temperature tolerance and intensity of composite material are further increased；The addition of glass fibre can play toughened system
Effect, there is the ptfe composite of glass fibre not only to have the advantages that polytetrafluoroethylene material, but also have both
Excellent mechanical performances, abrasion performance, dimensional stability and chemical resistance specific to glass fiber material, thus work as it
When the products such as bearing, gasket, valve seat, liner are made, production can be improved under the premise of not influencing its physical property and mechanical performance
Hardness, the compression strength of product reduce the indexs such as shrinking percentage, abrasion, production cost, to extend the service life of product；Also,
By selecting grain size in 1000-5000 mesh powder raw materials, the specific surface area of raw material is increased, keeps polytetrafluoroethylene (PTFE) abundant
Contact other raw materials, to make up the poor defect of polytetrafluoroethylene (PTFE) adhesive property, make carbon fiber, molybdenum disulfide, metal promoter,
It can fully be combined between glass fibre, polytetrafluoroethylene (PTFE), form stable combination interface, to further improve polytetrafluoro
The intensity and temperature tolerance of ethylene composite material；
By carbon fiber, molybdenum disulfide and polytetrafluoroethylene (PTFE) compound, improve ptfe composite heat resistance and
Mechanical property；And by the compounding of metal promoter and carbon fiber, the effect lubricated in system is played, there is preferable antifriction effect
Fruit, and by selecting grain size in 1000-5000 mesh powder raw materials, make to form stabilization between polytetrafluoroethylene (PTFE) and other raw materials
Combination interface, in the heat resistance and mechanical property for further improving ptfe composite；Meanwhile passing through glass fibers
Toughening is tieed up, polytetrafluoroethylene (PTFE) embrittlement is avoided；By upper, under the component ratio, by the addition of a small amount of auxiliary agent, with polytetrafluoroethyl-ne
Alkene is compound, improves the heat resistance of ptfe composite, enables the heatproof temperature of ptfe composite
Obtain 350 DEG C, and impart the excellent wearability of ptfe composite, thermal conductivity and compression strength, make by this poly- four
Filler made from fluoride composite material has higher temperature tolerance and intensity in valve body, has ensured the sealing effect of filler.
Preferably, metal promoter be bronze powder, brass powder, red copper powder one of which or more than one.
By using above-mentioned technical proposal, the filling of copper powder can improve the tensile strength of ptfe composite,
Hardness, wearability, pyroconductivity, while reducing cold flow properties.
Second object of the present invention is to provide a kind of product manufacture of high temperature pressurised ptfe composite.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of product manufacture of high temperature pressurised ptfe composite, including have the following steps：
Step1, raw material mixing：Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) are uniformly mixed, obtained
To mixed raw material；
Step2, mold pressing：Mixed raw material is pressed by mold, obtains product green compact；
Step3, green sintering：Product green compact are heated to resin melting, are cooled to room temperature to obtain product crude green body；
Step4, crude green body processing：By product crude green body by being machined into finished product.
By using above-mentioned technical proposal, raw material is uniformly mixed, mold pressing can be excluded as far as possible between material
Air, make ptfe composite molding become product, product can be polytetrafluoroethylene ring pad, polyfluortetraethylene pipe,
Stick, band, plate, film etc., the polytetrafluoroethylproducts products made of the technique have high intensity and high temperature tolerance, can be applied to height
Warm environment.
Preferably, being heated by electric oven in Step3, heating rate is 28-32 DEG C/h, is warming up to 360-390
℃。
By using above-mentioned technical proposal, the sintering temperature of 360-390 DEG C of polytetrafluoroethylene (PTFE) keeps polyflon molten
Protective layer is formed in product surface after melting, and is bonded each material, product is avoided to crack.
Preferably, product green compact are put into the baking dies filled with 5000 mesh polytetrafluorethylepowder powders in Step3
It is heated.
By using above-mentioned technical proposal, polytetrafluorethylepowder powder is filled in baking dies, reduces polytetrafluoroethylene powder
End is in direct contact with outside air, plays a protective role to carbon fiber, polytetrafluorethylepowder powder is enable to be attached to product table
The polytetrafluorethylepowder powder in face, 5000 mesh can be protected further to adding the material in polytetrafluoroethylene (PTFE), and isolation is empty
Gas further thickeies the thickness of protective layer, so that sintered product surface character is further stablized, while further increasing resistance to height
Warm nature.
Preferably, cooling rate cooling in Step3 is 45-65 DEG C/h.
By using above-mentioned technical proposal, cool down at speed, smaller on the influence of the harmomegathus of product, avoiding harmomegathus causes
Product problem of Cracking.
Third object of the present invention is to provide a kind of ring pads of high temperature pressurised ptfe composite manufacture, have
Preferable sealing effect.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of ring pads of high temperature pressurised ptfe composite manufacture include the pad of annular and are opened on pad
Annular groove, be embedded with the metallic elastic ring being coaxially disposed with pad in the annular groove, the pad is located at the two of metallic elastic ring
Side forms the interior spacing ring and outer spacing ring that restricted metallic elastic ring moves radially.
By using above-mentioned technical proposal, the design of metallic elastic ring can reinforce the reset effect of ring pads, when ring pads make
The extruding of used time, pipeline make ring pads radial outward expansion, and to make the axial width of ring pads reduce, metallic elastic ring can then limit
Ring pads processed are radially expanded, and improve the sealing effect of ring pads；And the design of annular groove can reduce ptfe composite
Usage amount, reduce cost, annular groove also has the function of water storage, condensed gas, seeped water on a small quantity in ring pads, permeation in the case of,
The time that aqueous vapor can be delayed to be revealed from pipeline provides the time for repairing pipe；Meanwhile using the polytetrafluoroethyl-ne of the present invention
The ring pads of alkene composite material manufacture can further increase the heat-resisting quantity and intensity of ring pads.
Preferably, the metallic elastic ring surface is modified by Silane coupling agent KH550.
By using above-mentioned technical proposal, the use of coupling agent KH550 can form organosilicon in metallic elastic ring surface
Protective layer delays metallic elastic ring to corrode, meanwhile, when the ring pads are used for high temperature steam pipeline, metallic elastic ring is at high temperature
It can be crosslinked by the silane coupling agent and the protective layer on pad surface on surface, improve the combination of metallic elastic ring and pad
Intensity, and then the axial movement of metallic elastic ring is limited, the stability of ring pads is improved, and then improve the radial direction of metallic elastic ring
Limit effect.
In conclusion the invention has the advantages that：
1, the ptfe composite passes through carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE)
Compounding imparts the excellent wearability of ptfe composite, thermal conductivity and compression strength in valve body with higher resistance to
Warm nature and intensity have ensured the sealing effect of filler, have ensured the running stability of valve body；
2, the manufacture craft of the ptfe composite influences the harmomegathus of product smaller, avoids product caused by harmomegathus
Problem of Cracking, high yield rate；
3, the ring pads manufactured by the ptfe composite by the design of metallic elastic ring can reinforce answering for ring pads
Position effect, improves the sealing effect of ring pads；And the design of annular groove can reduce the usage amount of ptfe composite, drop
Low cost, annular groove can delay the time that aqueous vapor is revealed from pipeline, and the time is provided for repairing pipe.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the ring pads of high temperature pressurised ptfe composite manufacture；
Fig. 2 is a kind of exploded perspective view of the ring pads of high temperature pressurised ptfe composite manufacture.
In figure, 1, pad；11, interior spacing ring；12, outer spacing ring；2, annular groove；4, metallic elastic ring.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1a
A kind of product manufacture of high temperature pressurised ptfe composite, including have the following steps：
Step1.1, material screening：By carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) mistake respectively
1000 mesh sieve and 5000 mesh sieve, obtain grain size 1000-5000 mesh raw material powder；
Step1.2, raw material mixing：By 0.5kg carbon fibers, 0.3kg molybdenum disulfide, 0.05kg metal promoters, 0.1kg glass fibres
It is uniformly mixed by high mixer with 9.05kg polytetrafluoroethylene (PTFE), obtains mixed raw material；
Step2, mold pressing：Mixed raw material is pressed by mold, obtains product green compact；
Step3.1, green sintering：It is heated by electric oven, heating rate is 28 DEG C/h, is warming up to 360 DEG C, starts to drop
Temperature, cooling rate is 45 DEG C/h, until room temperature obtains product crude green body；
Step4, crude green body processing：By product crude green body by being machined into finished product.
Metal promoter is bronze powder.
Embodiment 1b- embodiments 1e is roughly the same with the manufacturing process of embodiment 1a, and difference lies in for the group of raw material
Point and content parameter and sintering temperature be adjusted, design parameter see the table below (unit：kg)：
Product made from above-described embodiment is subjected to following test, product is valve seal ring pads, is circular ring shape：
(1) shore hardness：It is measured by Shore durometer；
(2) temperature tolerance (h)：
Product is mounted in valve body by Step1, using the fluid of 200Kpa as flow media, using 220 DEG C as initial temperature,
It is continually and steadily conveyed for 24 hours in valve body；
Step2 stops experiment, and record the temperature if being leaked in transmission process；If stablizing conveying rear valve body for 24 hours
It does not leak, flow media is heated up 10 DEG C, repeat flow media and continually and steadily convey in valve body to let out to valve body for 24 hours
Until leakage, stop experiment, and record the experimental temperature；
(3) pyroconductivity (W/ (mK))；
(4) service life (hour)：Product is mounted in valve body, using 300 DEG C, the fluid of 100Kpa as flow media, until
Valve body leaks, and records usage time.
Test result see the table below：
To sum up, there is higher high temperature resistance by the ring pads product of ptfe composite manufacture.
Embodiment 2
A kind of product manufacture of high temperature pressurised ptfe composite, including have the following steps：
Step1.1, material screening：By carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) mistake respectively
1000 mesh sieve and 2500 mesh sieve, obtain grain size 1000-2500 mesh raw material powder；
Step1.2, raw material mixing：By 0.85kg carbon fibers, 0.6kg molybdenum disulfide, 0.1kg metal promoters, 0.2kg glass fibres
It is uniformly mixed by high mixer with 8.3kg polytetrafluoroethylene (PTFE), obtains mixed raw material；
Step2, mold pressing：Mixed raw material is pressed by mold, obtains product green compact；
Step3.1, green sintering：It is heated by electric oven, product green compact is put into metal die and are sintered, metal
The inner wall of mold is coated with 5000 mesh polytetrafluorethylepowder powders；
Step3.2, heating rate are 30 DEG C/h, are warming up to 390 DEG C, start to cool down, and cooling rate is 50 DEG C/h, until room temperature obtains
Product crude green body；
Step4, crude green body processing：By product crude green body by being machined into finished product.
Metal promoter is bronze powder.
Product made from embodiment 2 is equally tested, product is valve seal ring pads, is circular ring shape, test knot
Fruit see the table below：
| Shore hardness | Temperature tolerance | Pyroconductivity | Service life | |
| Embodiment 2 | 63 | 360 | 0.56 | 8541 |
Embodiment 3a
Referring to Fig. 1 and Fig. 2, a kind of ring pads of high temperature pressurised ptfe composite manufacture, include the pad in circular ring shape
Body 1 and the annular groove 2 being opened on pad 1.Annular groove 2 is coaxially disposed with pad 1, and the opening of annular groove 2 is positioned at the upper table of pad 1
Face.The both sides that pad 1 is located at annular groove 2 are respectively formed with interior spacing ring 11 and outer spacing ring 12 in a ring.11 He of interior spacing ring
Outer spacing ring 12 is equally coaxially disposed with pad 1.The metallic elastic ring 3 being coaxially disposed with annular groove 2, metal are embedded in annular groove 2
Elastic ring 3 is bellows or spring, and the peripheral wall of metallic elastic ring 3 is connected to interior spacing ring 11 and outer spacing ring 12 respectively
On.Metallic elastic ring 3 is made of stainless steel.
Embodiment 3b
Difference lies in after embodiment 3b is made of stainless steel using metallic elastic ring 3, make embodiment 3b with embodiment 3a
It is modified with being preceding immersed in Silane coupling agent KH550 solution, soaking time is 30 minutes.And when embodiment 3b uses implementation
When the manufacturing process of example 2 is manufactured, metallic elastic ring 3 is mounted in annular groove 2, and in 3 surface hairbrush of metallic elastic ring
5000 mesh polytetrafluorethylepowder powders are smeared, then are sintered.
Ring pads disclosed in embodiment 3a or 3b are made using embodiment 2, ring pads made from embodiment 3a or 3b are same
It is tested, test result see the table below：
| Shore hardness | Temperature tolerance | Pyroconductivity | Service life | |
| Embodiment 3a | 63 | 360 | 0.56 | 9041 |
| Embodiment 3b | 63 | 360 | 0.56 | 9284 |
To sum up, for embodiment 3a and embodiment 3b by the improvement of ring pads structure, further improve embodiment ring pads uses the longevity
Life.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (9)
1. a kind of high temperature pressurised ptfe composite, which is characterized in that agitated, pressing is sintered, with quality hundred
Score meter, is made of following raw material：5 ~ 12% carbon fiber, 3 ~ 8% molybdenum disulfide, 0.5 ~ 2.0% metal promoter, 1 ~ 3%
Glass fibre, surplus are polytetrafluoroethylene (PTFE)；
Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) take grain size in 1000- by sieve screening
The raw material powder of 5000 mesh.
2. a kind of high temperature pressurised ptfe composite, which is characterized in that agitated, pressing is sintered, with quality hundred
Score meter, is made of following raw material：8% carbon fiber, 6% molybdenum disulfide, 1% metal promoter, 2% glass fibre, 83%
Polytetrafluoroethylene (PTFE)；
Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) take grain size in 2500- by sieve screening
The grain size of the raw material powder of 5000 mesh, glass fibre is chosen between 1000-2500 mesh.
3. high temperature pressurised ptfe composite according to claim 1 or 2, which is characterized in that metal promoter is
Bronze powder, brass powder, red copper powder one of which or more than one.
4. using the product manufacture of high temperature pressurised ptfe composite as described in any one of claims 1-3,
It is characterised in that it includes having the following steps：
Step1, raw material mixing：Carbon fiber, molybdenum disulfide, metal promoter, glass fibre and polytetrafluoroethylene (PTFE) are uniformly mixed, obtained
To mixed raw material；
Step2, mold pressing：Mixed raw material is pressed by mold, obtains product green compact；
Step3, green sintering：Product green compact are heated to resin melting, are cooled to room temperature to obtain product crude green body；
Step4, crude green body processing：By product crude green body by being machined into finished product.
5. the ring pads manufacturing process of high temperature pressurised ptfe composite according to claim 4, which is characterized in that
It is heated by electric oven in Step3, heating rate is 28-32 DEG C/h, is warming up to 360-390 DEG C.
6. the ring pads manufacturing process of high temperature pressurised ptfe composite according to claim 5, which is characterized in that
Product green compact are put into the baking dies filled with 5000 mesh polytetrafluorethylepowder powders in Step3 and are heated.
7. the ring pads manufacturing process of high temperature pressurised ptfe composite according to claim 4, which is characterized in that
Cooling cooling rate is 45-65 DEG C/h in Step3.
8. special using the ring pads of high temperature pressurised ptfe composite as described in any one of claims 1-3 manufacture
Sign is, includes the pad of annular（1）And it is opened in pad（1）On annular groove（2）, the annular groove（2）Inside be embedded with
Pad（1）The metallic elastic ring of coaxial arrangement（4）, the pad（1）Positioned at metallic elastic ring（4）Two sides formed it is restricted
Metallic elastic ring（4）The interior spacing ring moved radially（11）With outer spacing ring（12）.
9. ring pads according to claim 8, which is characterized in that the metallic elastic ring（4）Surface passes through silane coupling agent
KH550 is modified.
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| CN201810183567.5A CN108440879B (en) | 2018-03-06 | 2018-03-06 | High-temperature pressurized polytetrafluoroethylene composite material, product manufacturing process thereof and ring gasket |
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| CN201810183567.5A CN108440879B (en) | 2018-03-06 | 2018-03-06 | High-temperature pressurized polytetrafluoroethylene composite material, product manufacturing process thereof and ring gasket |
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Cited By (4)
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|---|---|---|---|---|
| CN109181178A (en) * | 2018-08-27 | 2019-01-11 | 四川大学 | A kind of preparation method of high thermal conductivity PTFE composite membrane material |
| CN110079036A (en) * | 2019-04-26 | 2019-08-02 | 广东欧特派环保材料科技有限公司 | A kind of wear-resisting PTFE/Cu composite material and preparation method of pressure resistance |
| CN115109362A (en) * | 2022-08-11 | 2022-09-27 | 中国石油天然气集团有限公司 | Polytetrafluoroethylene rotation control head sealing element, preparation method thereof and sealing structure |
| WO2024195879A1 (en) * | 2023-03-23 | 2024-09-26 | Ntn株式会社 | Seal material, seal member for compressor, cup seal for reciprocating compressor, and tip seal for scroll compressor |
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| CN115109362A (en) * | 2022-08-11 | 2022-09-27 | 中国石油天然气集团有限公司 | Polytetrafluoroethylene rotation control head sealing element, preparation method thereof and sealing structure |
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