WO2001070854A1 - Anneau d'etancheite - Google Patents
Anneau d'etancheite Download PDFInfo
- Publication number
- WO2001070854A1 WO2001070854A1 PCT/JP2001/002222 JP0102222W WO0170854A1 WO 2001070854 A1 WO2001070854 A1 WO 2001070854A1 JP 0102222 W JP0102222 W JP 0102222W WO 0170854 A1 WO0170854 A1 WO 0170854A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- cycle
- seconds
- powder
- power steering
- Prior art date
Links
Classifications
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
-
- 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
Definitions
- the present invention relates to a seal ring, particularly a seal ring having excellent durability against high-pressure sliding on a sliding surface.
- the seal ring of the present invention is a seal ring for a valve unit for a valve device, particularly in a power steering of an automobile. Suitable for use
- Polytetrafluoroethylene (PTFE) is used as a sliding member at high temperature and high hydraulic pressure by taking advantage of its properties such as non-adhesiveness, low sliding properties, and heat resistance. Used as a material for seal rings for oil seals
- an oil seal sealing ring having such a sliding surface (hereinafter, sometimes simply referred to as “the sealing ring”) is an endless. There are many evening eves, such as the one shown in the schematic cross section in Fig. 1, and they are usually used in the scene as shown in the schematic cross section in Fig. 2. That is, the seal ring 1 is composed of two members (hows) that move relative to each other in a rotating part and a sliding part.
- the seal ring 1 is wound around the seal ring set body 3 and forms a sliding surface with the nose ring 2. are doing .
- the sealing ring pod 3 rotates relative to the housing 2, but relatively high hydraulic pressure is applied from the oil 4. Repeat and rotate forward and reverse Under such loads, it can break relatively quickly and cause oil 4 leakage.
- the seal ring 1 is made of rubber bands. It needs to have a certain amount of elasticity in order to be stretched and attached, but it is required to quickly return to its original shape after being attached. .
- the inventors of the present invention have conducted various studies to develop a seal ring having both high-pressure sliding durability and mountability in a good manner, as a result of a series of studies.
- degree of crystallinity so that the degree of crystallinity of the PTFE in the ring falls within a specific range, it has been found that the desired effect can be obtained. And filed earlier.
- X is a perfluoroalkyl group having 1 to 6 carbon atoms or a perfluoroalkyloxy group having 2 to 9 carbon atoms
- Modified P which contains 0.01% of perfluorovinylether units by weight and cannot be melt-molded.
- the sealings of the invention may or may not contain fillers.
- fillers When compounding a filler, use aromatic polybenzoylester heat-resistant resin powder, graphite powder, carbon fiber, bronze powder, or any of these. It is desirable to use two or more of these.
- the sealing of the present invention is particularly useful as a valve device for power steering of an automobile.
- Test equipment Seal ring durability evaluation test equipment based on hook & pinion type power steering equipment
- Shearing-incorporated member Carbon steel (JISG4051)
- the seal ring of the present invention uses a sliding cycle under the following conditions (2). Those that do not break in 200,000 cycles when removed are preferred from the standpoint of high pressure sliding durability.
- Test equipment Sealing durability evaluation tester based on rack and pinion type power steering equipment
- Seal ring built-in member Carbon steel (JISG4051)
- the seal ring of the present invention can reduce the sliding cycle under the following conditions (3). Those that do not break in 200,000 cycles are preferable in terms of high-pressure sliding durability.
- Test equipment Rack & pinion type, sealing durability evaluation tester conforming to ° 1 steering equipment
- Cycle forward rotation 95 rpm X 2 seconds and reverse rotation 95 rpm X 2 seconds and a cycle that can be used as a single cycle is a partner material: aluminum die cast (JISH 53 0
- FIG. 1 is a schematic cross-sectional view of one embodiment of the seal ring of the present invention.
- FIG. 2 is a partial schematic cross-sectional view of a device provided with the seal ring of the present invention.
- the seal ring of the present invention is made of modified PTFE powder by compression molding, ram extrusion, paste extrusion, isostar. It is manufactured by molding by a known molding method such as a stick molding method or a hot coining molding method.
- the modified PTFE powder as a raw material contains 0.01 to 1% by weight of a perfluorovinyl ether unit represented by the above formula (I), and is measured by a differential scanning calorimeter. It is a modified PTFE with a heat of crystallization of 18 to 25 Jg which cannot be melt-formed.
- perfluorovinyl ether represented by the formula (I) include, for example, perfluoro (methyl vinyl ether) (PMVE), and perfluorovinyl ether (PMVE).
- PVE Perfluoro (pentyl vinyl), Perfluoro (hexyl vinyl ether)
- perfluoro (2 -p) D-polypropylene (vinyl alcohol) and other perfluoro (aluminum vinyl) can be used to create a vinyl-termonomer. Due to the relatively low price among them, it is possible to use
- the content of the octafluorovinyl ether unit is 0.
- the creep resistance tends to decrease. If the amount is too large, the heat resistance decreases, as does the tensile strength and the crack resistance. In addition, although a large amount of expensive perfluorovinyl ether is used, the effect of improving high-pressure sliding durability and creep resistance is small, which is economically disadvantageous.
- the modified PTF E used in the present invention has a melt viscosity (3
- Modified PTFE having this melt viscosity has a relatively large molecular weight, and cannot be melt-molded.
- the modified PTFE having a high molecular weight has a heat of crystallization measured by a differential scanning calorimeter of 1825 JZg.
- the average particle size of the PTFE powder is from 10 to 20 m, preferably from 10 to 50 m.
- the series of the present invention may contain fillers.
- Particularly preferable fillers include aromatic aromatic polybenzoyl ester heat-resistant resin powder, graphite powder, carbon fiber, and carbon fiber. Either rose powder or two or more of these are required.
- the aromatic polyoxybenzoyl ester-based heat-resistant resin powder includes, for example, structural units (II):
- Resin powders having a high thermal resistance, chemical resistance, and abrasion resistance are preferred.
- X is a letter — m is 0 or 1 and n is 0 or 1).
- Commercially available products include, for example, Sumika Super (trademark, manufactured by Sumitomo Chemical Co., Ltd.) and Econole (trademark, manufactured by Carborundum). and so on .
- the average particle size is l to 300 m, preferably 5 to 150 mm, particularly 10 to 50 mm, and the dispersibility of the resin powder is good. In addition, the strength of the obtained sealing ring is excellent.
- Aromatic polybenzoyl ester heat-resistant resin powder is one that has been surface-treated with a silane coupling agent or the like. Or powders with various water-repellent treatments But it may be.
- Examples of the graphite powder include natural graphite, artificial graphite, expanded graphite, fusidian graphite, spherical carbon, fluorinated carbon, graphite whisker, and the like. Is overwhelmed. Particularly preferred is natural graphite.
- the average particle size of the graphite powder is preferably from 0.1 to 500 m, particularly preferably from 5 to 20 m.
- Bronze powders include, for example, copper-tin alloys, or aluminum, zinc, lead, chromium, nickel, iron, and molybdenum. Those containing one or more metal elements, such as ribden, manganese, and phosphorus.
- the average grain size is 5 to 500 m, preferably 10 to 10 O jum.
- fillers such as molybdenum disulfide, boron nitride, tungsten disulfide, Myai, and polyimid may be used.
- the mixing ratio (% by weight) of the PTFE powder and the filler is 60 to 97Z 40 to 3 (total 100% by weight), preferably 70 to 95/3/0 to 5, In particular, it is set to 80 to 90/20 to 10. Too much filler will impair the inherent properties of PTFE, while too little will impair self-wear and impair the sealing performance under high pressure. .
- a resin powder for seal ring molding are mixed by a conventional method, and if necessary, granulated to form a resin powder for seal ring molding.
- Various molding methods such as a compression molding method and a ram extrusion method, are used. Molding method, paste extrusion molding method, isostatic molding method, hot coining molding It is formed into a seal ring by a known molding method such as a method. Regardless of the molding method, the molded article is finally fired.
- a firing temperature of 323 to 400, preferably 350 to 385 is employed.
- the feature of the present invention is that the use of high molecular weight modified PTFE maintains the high pressure sliding durability required for the obtained seal ring over a wide range of crystallinity. Since it is possible to improve the mountability, the molding conditions can be relaxed.
- the crystallinity can be determined by, for example, (A) a method of controlling the cooling rate after firing (the higher the cooling rate, the lower the crystallinity. (B) The temperature is raised immediately before firing by removing it from the firing furnace immediately and cooling it naturally by allowing it to cool naturally in the air. Rolling method (the higher the heating rate, the lower the degree of crystallinity), (C) Controlling the baking time (the baking time is shortened) And (D) a method of controlling the firing temperature (lower firing temperature results in lower crystallinity).
- A a method of controlling the cooling rate after firing
- B The temperature is raised immediately before firing by removing it from the firing furnace immediately and cooling it naturally by allowing it to cool naturally in the air. Rolling method (the higher the heating rate, the lower the degree of crystallinity), (C) Controlling the baking time (the baking time is shortened) And (D) a method of controlling the firing temperature (lower firing temperature results in lower crystallinity).
- the method (A) is preferable because the control can easily simplify the firing step.
- the cooling rate can be controlled by cooling naturally in the air at room temperature (10 to 30) or by water cooling in water of 15 or less. It is preferred that you When the cooling rate is increased, the crystallinity decreases and the high-pressure sliding durability decreases, but according to the present invention, the crystallinity decreases somewhat. Since the high-pressure sliding durability sufficiently satisfies the required characteristics, the cooling time can be reduced, and no problem occurs even if the cooling temperature has a certain width. Therefore, temperature control can be simplified.
- the seal ring thus obtained has excellent durability such that it does not break in 200,000 sliding cycles when measured under the test conditions (1) described above. It is something.
- the devices having sliding parts to which the seal ring of the present invention is applied include hydraulic power steering devices and automats for automobiles. Chip transmissions, engine piston rings, shock absorbers, etc. are used for industrial machinery as hydraulic cylinders. Daichi, etc. will be killed. Of these, the sliding resistance is low, the wear of the mating material is small, the seal deformation under high pressure (8 MPa or more) is small, and it can be used for a long period of time. For power steering valves of automobiles, which require special characteristics of low oil leakage It is suitable as a dress type sealing ring.
- Modified PTF E 1 Void heat of crystallization 2 34 g or less, referred to as “modified PTF E 1”.
- 90 parts by weight of a powder having an average particle size of 30 m) and an aromatic polybenzobenzene ester heat-resistant resin powder (Sumika Super, manufactured by Sumitomo Chemical Co., Ltd.) 5/100 parts by weight of natural graphite powder (manufactured by Chuetsu Graphite Co., Ltd.), with an average particle size of 9 / zm. , "GR”) 5 parts by weight were premixed by a conventional method, and then granulated to prepare a molding resin powder.
- a viscoelasticity measuring device manufactured by Leometrics Co., Ltd.
- the dynamic viscoelasticity is measured at 380 using RDS_2.
- the frequency is 0.001 to 500 rad Z seconds, and the sampling frequency of the measured values is logarithmically equal to 5 points per digit.
- the measurement is repeated until the average of the deviation of G '(w) at each measurement frequency becomes 5% or less.
- the aluminum plate was placed in an N 2 atmosphere.
- the temperature is raised to 250 ° C and held for 1 minute, and further raised to 38 ° C at a rate of 10Z minutes to sufficiently melt the crystals.
- the temperature is decreased from 380 to 10 at a rate of 25 minutes at a rate of 25 minutes, and the heat of crystallization at the crystallization point is measured.
- the value of the heat of crystallization is determined by drawing a tangent from the point at 275 of the obtained DSC chart to the other end of the peak, and determining whether the area surrounded by the tangent and the curve of the peak Ask for it.
- test seal rings rings with an inner diameter of 33.4 mm, an outer diameter of 36.4 mm, and a height of 1.88 mm
- Table 1 shows the results.
- Measuring device Differential scanning calorimeter manufactured by Seiko Denshi Kogyo Co., Ltd.
- Measurement conditions The temperature was raised from room temperature to 250 to 50 minutes, held at 250 to 1 minute, then raised to 180 to 10 minutes, and raised to 180 Hold for a minute.
- Crystallinity (%) (measured heat of fusion 100%) Heat of fusion of crystallized PTFE X 100
- the heat of fusion of 100% crystallized PTFE is 92.93 JZg under the above measurement conditions.
- Test equipment Sealing durability evaluation test equipment based on rack and pinion type power steering equipment
- Oil type Steering flow (Rod PsF manufactured by Mitsubishi Nisseki Co., Ltd.)
- Sliding cycle One cycle consists of a forward rotation of 95 rpm x 2 seconds and a reverse rotation of 95 rpm x 2 seconds.
- Partner material Aluminum Diecast ADC12 (JISH5302)
- Sealing ring built-in member Carbon steel S45C (JISG4051) 0
- a seal ring of the present invention was prepared in the same manner as in the example except that the sample was naturally cooled in the air in step 20 and the crystallinity and wearability were evaluated in the same manner as in the example. The results of examining the durability and durability are shown in Fig. 4.
- Example 3
- a sealing ring of the present invention was prepared in the same manner as in Example 1 except that it was naturally cooled in the air at room temperature 25: and the crystallinity was determined in the same manner as in Example 1. The wearability and durability were examined. Table 1 shows the results.
- modified PTFE 2 PTFE modified with 1% by weight of fluoro (fluorovinyl ether) (melt viscosity (380)) 6.5 X 10 9 Voids, heat of crystallization: 30.2 JZ g, hereinafter referred to as “modified PTFE 2”), except that a powder having an average particle diameter of 30 / m was used. (Naturally cooled in the air at room temperature 25), a sealing ring for comparison was prepared, and the crystallinity, mountability and durability were determined in the same manner as in Example 1. Examined . Table 1 shows the results.
- a seal ring was prepared in the same manner as in Example 1 except that the modified PTFE and the filler were changed to those shown in Table 2, and the actual sealing was performed.
- the crystallinity and durability were examined in the same manner as in Example 1. Table 2 shows the results. In Examples 7 to 9, after firing, the temperature was lowered at 50 / hr instead of natural cooling in the air.
- Bz bronze powder (SD—200, average particle size 20 m, manufactured by Fukuda Metals Co., Ltd.)
- CF Carbon fiber (M2006S, average fiber diameter: 15 um, average fiber length: 100 m, manufactured by Cleha Co., Ltd.)
- POB Aromatic polybenzene Luster-based heat-resistant resin powder (Sumika Super, manufactured by Sumitomo Chemical Co., Ltd., average particle size 20 m)
- GR Natural graphite powder (CPB—30 from Chuetsu Graphite Co., Ltd.)
- a sealing ring was prepared in the same manner as in Example 1 except that the modified PTFE and the filler were changed to those shown in Table 3, and the degree of crystallinity was changed in the same manner as in Example 1. The durability and durability were examined. Table 3 shows the results. The durability test was performed under the following conditions.
- Test equipment Sealing durability evaluation test equipment based on rack and pinion type power steering equipment
- Oil type Power steering flow (Rodeo PSF manufactured by Mitsubishi Nisseki Co., Ltd.)
- Sliding cycle One cycle consists of a forward rotation of 95 rpm x 2 seconds and a reverse rotation of 95 rpm x 2 seconds.
- Counterpart material Aluminum die cast ADC 12 (JISH 5 3 0 2)
- a sealing ring of the present invention was prepared in the same manner as in Example 1 except that the modified PTFE and the filler were changed to those shown in Table 4, and the same as in Example 1 was performed. Then, the crystallinity and durability were adjusted. Table 4 shows the results. The durability test was performed under the following conditions.
- Test equipment Rack & pinion type. ⁇ Sealing durability evaluation tester based on steering equipment
- Oil type Power steering flow (Rodeo PSF manufactured by Mitsubishi Nisseki Co., Ltd.)
- Sliding cycle One cycle consists of a forward rotation of 95 rpm x 2 seconds and a reverse rotation of 95 rpm x 2 seconds.
- Counterpart material Aluminum die cast A DC 12 (JISH 5 3 0 2)
- the seal ring of the present invention has excellent durability without being damaged for a long period of time even in sliding use under high pressure, and has a necessary mounting property. A stable oil seal effect can be obtained between them, and in particular, it has the favorable characteristics of the seal ring of the endless type.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
- Sealing Devices (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/239,500 US6930142B2 (en) | 2000-03-24 | 2001-03-21 | Seal ring |
DE60128668T DE60128668T2 (de) | 2000-03-24 | 2001-03-21 | Dichtungsring |
EP01917479A EP1273614B1 (en) | 2000-03-24 | 2001-03-21 | Seal ring |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000084832 | 2000-03-24 | ||
JP2000-84832 | 2000-03-24 | ||
JP2000184811 | 2000-06-20 | ||
JP2000-184811 | 2000-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001070854A1 true WO2001070854A1 (fr) | 2001-09-27 |
Family
ID=26588312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/002222 WO2001070854A1 (fr) | 2000-03-24 | 2001-03-21 | Anneau d'etancheite |
Country Status (5)
Country | Link |
---|---|
US (1) | US6930142B2 (ja) |
EP (1) | EP1273614B1 (ja) |
CN (1) | CN1216931C (ja) |
DE (1) | DE60128668T2 (ja) |
WO (1) | WO2001070854A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006059642A1 (ja) * | 2004-11-30 | 2006-06-08 | Daikin Industries, Ltd. | 変性ポリテトラフルオロエチレン成形体及びその製造方法 |
US7528221B2 (en) | 2005-11-30 | 2009-05-05 | Daikin Industries, Ltd. | Modified polytetrafluoethylene molded article and process for manufacture thereof |
JP2011011535A (ja) * | 2009-06-03 | 2011-01-20 | Nichias Corp | ペースト押出成形方法及びペースト押出成形体 |
WO2021210435A1 (ja) * | 2020-04-15 | 2021-10-21 | 株式会社バルカー | シール材 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1225377A4 (en) * | 1999-10-21 | 2006-02-08 | Daikin Ind Ltd | WATERTIGHT RING |
CN1280376C (zh) * | 2000-05-25 | 2006-10-18 | 大金工业株式会社 | 密封环 |
WO2007082110A1 (en) * | 2006-01-05 | 2007-07-19 | Saint-Gobain Performance Plastics Corporation | Composite material and seals formed thereof |
JP2009024541A (ja) * | 2007-07-18 | 2009-02-05 | Sanden Corp | 軸シール |
KR101150153B1 (ko) * | 2008-10-02 | 2012-05-25 | 한국표준과학연구원 | 다이나믹 고압 실링장치 |
CN102245943A (zh) | 2008-12-24 | 2011-11-16 | 美国圣戈班性能塑料公司 | 用于高压泵应用的聚合物材料及其形成的密封件 |
CN204212877U (zh) * | 2014-11-10 | 2015-03-18 | 大陆汽车电子(芜湖)有限公司 | 密封***及包括该密封***的废气再循环阀 |
DE202014011034U1 (de) * | 2014-11-28 | 2017-06-23 | Elringklinger Ag | Dichtelement |
JP6660541B2 (ja) * | 2015-08-18 | 2020-03-11 | 株式会社ジェイテクト | シール部材 |
KR102616116B1 (ko) * | 2017-07-21 | 2023-12-21 | 도호 카세이 가부시키가이샤 | 탱크 및 약액 공급시스템 |
CN108102262B (zh) * | 2017-11-30 | 2021-06-11 | 广州机械科学研究院有限公司 | 一种高速高压液压油缸用聚四氟乙烯密封材料及其制备方法和应用 |
WO2021168062A1 (en) | 2020-02-21 | 2021-08-26 | Swimc Llc | Stain-blocking polymers, primers, kits, and methods |
CN113667248A (zh) * | 2021-08-25 | 2021-11-19 | 深圳市明鑫高分子技术有限公司 | 高分子填充改性材料及其成型工艺 |
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EP0583481A1 (en) * | 1992-02-05 | 1994-02-23 | Daikin Industries, Ltd. | Polytetrafluoroethylene powder for molding |
JPH08319391A (ja) * | 1995-05-25 | 1996-12-03 | Nippon Pillar Packing Co Ltd | 摺動用部材 |
JPH09324091A (ja) * | 1996-06-07 | 1997-12-16 | Mitsubishi Cable Ind Ltd | フッ素樹脂組成物 |
JPH11116623A (ja) * | 1997-10-09 | 1999-04-27 | Hitachi Cable Ltd | 改質ふっ素樹脂及び成形体 |
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JPS57105442A (en) * | 1980-12-23 | 1982-06-30 | Sakagami Seisakusho:Kk | Filler-containing polytetrafluoroethylene molding powder and fluoroplastic molded product |
JP2864848B2 (ja) * | 1992-02-28 | 1999-03-08 | 株式会社阪上製作所 | シール装置 |
EP0857747A4 (en) * | 1995-10-27 | 1999-06-09 | Daikin Ind Ltd | GRANULAR POLYTETRAFLUORETHYLENE POWDER CONTAINING FULL SUBSTANCE AND METHOD FOR PRODUCING THE SAME |
US5888424A (en) * | 1997-07-24 | 1999-03-30 | E. I. Du Pont De Nemours And Company | Fluorescent fluoroplastics |
-
2001
- 2001-03-21 US US10/239,500 patent/US6930142B2/en not_active Expired - Lifetime
- 2001-03-21 CN CN01807125.2A patent/CN1216931C/zh not_active Expired - Fee Related
- 2001-03-21 DE DE60128668T patent/DE60128668T2/de not_active Expired - Lifetime
- 2001-03-21 EP EP01917479A patent/EP1273614B1/en not_active Expired - Lifetime
- 2001-03-21 WO PCT/JP2001/002222 patent/WO2001070854A1/ja active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0583481A1 (en) * | 1992-02-05 | 1994-02-23 | Daikin Industries, Ltd. | Polytetrafluoroethylene powder for molding |
JPH08319391A (ja) * | 1995-05-25 | 1996-12-03 | Nippon Pillar Packing Co Ltd | 摺動用部材 |
JPH09324091A (ja) * | 1996-06-07 | 1997-12-16 | Mitsubishi Cable Ind Ltd | フッ素樹脂組成物 |
JPH11116623A (ja) * | 1997-10-09 | 1999-04-27 | Hitachi Cable Ltd | 改質ふっ素樹脂及び成形体 |
Non-Patent Citations (1)
Title |
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See also references of EP1273614A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006059642A1 (ja) * | 2004-11-30 | 2006-06-08 | Daikin Industries, Ltd. | 変性ポリテトラフルオロエチレン成形体及びその製造方法 |
JPWO2006059642A1 (ja) * | 2004-11-30 | 2008-06-05 | ダイキン工業株式会社 | 変性ポリテトラフルオロエチレン成形体及びその製造方法 |
JP5012027B2 (ja) * | 2004-11-30 | 2012-08-29 | ダイキン工業株式会社 | 変性ポリテトラフルオロエチレン成形体及びその製造方法 |
US7528221B2 (en) | 2005-11-30 | 2009-05-05 | Daikin Industries, Ltd. | Modified polytetrafluoethylene molded article and process for manufacture thereof |
JP2011011535A (ja) * | 2009-06-03 | 2011-01-20 | Nichias Corp | ペースト押出成形方法及びペースト押出成形体 |
WO2021210435A1 (ja) * | 2020-04-15 | 2021-10-21 | 株式会社バルカー | シール材 |
Also Published As
Publication number | Publication date |
---|---|
DE60128668D1 (de) | 2007-07-12 |
CN1216931C (zh) | 2005-08-31 |
EP1273614A4 (en) | 2005-06-29 |
US6930142B2 (en) | 2005-08-16 |
CN1419580A (zh) | 2003-05-21 |
EP1273614B1 (en) | 2007-05-30 |
DE60128668T2 (de) | 2008-01-31 |
US20030111798A1 (en) | 2003-06-19 |
EP1273614A1 (en) | 2003-01-08 |
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