WO2009142292A1 - Gasket material - Google Patents
Gasket material Download PDFInfo
- Publication number
- WO2009142292A1 WO2009142292A1 PCT/JP2009/059421 JP2009059421W WO2009142292A1 WO 2009142292 A1 WO2009142292 A1 WO 2009142292A1 JP 2009059421 W JP2009059421 W JP 2009059421W WO 2009142292 A1 WO2009142292 A1 WO 2009142292A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gasket
- filler
- reinforcing fiber
- joint sheet
- raw material
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C09K2200/0247—Silica
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0607—Rubber or rubber derivatives
- C09K2200/0612—Butadiene-acrylonitrile rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0692—Fibres
- C09K2200/0695—Polyamide fibres
Definitions
- the present invention relates to a material for a gasket used in an engine or a transmission mounted on a vehicle or the like, and in particular, a raw material obtained by kneading rubber, a reinforcing fiber, and a filler is pressure-laminated and vulcanized with a calender roll.
- the present invention relates to a gasket material made of a molded joint sheet.
- the gasket insertion part between the housing of the transmission combined with the engine and the cover fixed with bolts has a large temperature change due to repeated operation and stop of the engine.
- repeated relative displacement (fretting) occurs between the joint surfaces of the housing and the cover and the gasket due to repeated temperature changes.
- fretting occurs due to an external force applied to the cover or the like.
- the base material layer is combined with a surface layer and a back layer having different fixing strengths to greatly improve the seal durability as a three-layer structure, or as described in Patent Document 2,
- the base material layer is combined with a surface layer and a back layer having different friction coefficients to provide a three-layer structure, thereby greatly improving the seal durability.
- the strength of the reinforcing fiber is increased by increasing the mixing amount of the reinforcing fiber into the rubber material or filler, or increasing the fiber length of the reinforcing fiber.
- aramid fibers are particularly expensive, and the amount of aramid fibers needs to be reduced in order to reduce costs.
- the aramid fiber is a reinforcing material for improving the tensile strength of the rubber instead of the asbestos fiber which is now banned, it is difficult to reduce the compounding amount.
- the conventional sheet has a three-layer structure, and this three-layer structure inevitably increases raw material costs, complicates the material blending, kneading process and sheet forming process. The complexity of this process is high. This leads to cost reduction.
- the sheet described in Patent Document 3 has a two-layer structure, and kneaded aramid fiber, barium sulfate, etc. into a rubber material to increase strength while increasing flexibility of the joint sheet.
- the present invention has been made in order to advantageously solve the above-mentioned problems, and the gasket material of the present invention is obtained by pressure laminating and vulcanizing a raw material in which rubber, reinforcing fiber and filler are mixed with a calender roll.
- the basic composition of the raw materials is NBR as rubber: 16 to 28 wt%, aramid fiber as reinforcing fiber: 4 to 8 wt%, and these are also acicular dolomite as reinforcing fiber : 10 to 20 wt%, silica particles as a filler: 8 to 20 wt%, and inorganic filler as a filler: the balance.
- the gasket material of the present invention aims to reduce the cost while maintaining the performance of the joint sheet.
- the blending amount of aramid fibers is decreased, a decrease in tensile strength, a decrease in sealing performance due to a decrease in flexibility, and a decrease in heat resistance occur.
- the aramid fiber as the reinforcing fiber has a blending amount of 4 to 8 wt%, and the aramid fiber has a specific surface area of 6 to 12 m 2 / g, which is an index of the fibrillation degree.
- the silica particles as the filler are blended in an amount of 8 to 20 wt%, and the silica particles preferably have a primary particle diameter of, for example, 32 to 48 nm.
- acicular dolomite as another reinforcing fiber is used at a blending amount of 10 to 20 wt%, and the acicular dolomite has, for example, a microneedle with an average particle diameter of 4 to 12 ⁇ m. It is preferable to proceed with shaping. According to this acicular dolomite, since it can finish smoothly, without making the sheet surface rough, a two-layer structure can be made possible, maintaining sealing performance.
- clay particles hydroxous aluminum silicate
- barium sulfate calcium carbonate
- diatomaceous earth diatomaceous earth
- magnesium oxide and the like can be blended with the inorganic filler serving as the remaining filler.
- the gasket material of the present invention since the reinforcing fibers are entangled during mixing, the tensile strength of the joint sheet is improved. Further, the heat resistance can be improved by improving the compression recovery property and the stress relaxation property.
- the gasket surface can be smoothed and the sealing performance can be sufficiently enhanced.
- the strength of the joint sheet is not improved by the method of increasing the roll pressure or the temperature of the hot roll when the joint sheet is formed, so that the hardness of the joint sheet can be kept low, and the sealing performance can be sufficiently enhanced. It is possible to improve the sealing performance.
- the strength of the reinforcing fiber is increased by increasing the composition amount of the reinforcing fiber, the strength of the reinforcing fiber is increased by increasing the morphological effect, and the rubber and the reinforcing fiber. Since the blending ratio of the filler is changed between the intermediate layer and the surface layer so that the surface layer is more flexible than the intermediate layer, it is manufactured by soaring raw material costs and complicated raw material compounding processes. The problem of increasing costs can be avoided.
- FIG. 1 is a cross-sectional view showing an embodiment of the gasket material of the present invention.
- Reference numeral 1 in the drawing denotes a joint sheet as a gasket material of the embodiment, and the joint sheet 1 is a so-called intermediate material. It has a two-layer structure of a main layer 1a made of and a surface layer 1b made of so-called dish material.
- the joint sheet 1 includes NBR as rubber, fibrillated (fine fiber) aramid fibers as reinforcing fibers, acicular dolomite as reinforcing fibers, and silica particles as fillers.
- the raw material mixed with an inorganic filler such as clay as a filler is supplied onto a hot roll of a calender roll having a pair of rolls of a hot roll and a cold roll, and kneaded with these rolls. It is formed by being laminated on a hot roll by pressurizing while being further vulcanized and cured by the heat of the hot roll and then peeled off from the hot roll. And in that case, as shown in FIG. 1, two layers, the main layer 1a and the surface layer 1b, are formed by varying the composition of the reinforcing fiber and the filler.
- the basic composition of the raw materials is NBR: 16 to 28 wt%, aramid fiber: 4 to 8 wt%, acicular dolomite: 10 to 20 wt%, and silica particles: 8 It shall consist of ⁇ 20 wt% and inorganic filler: balance.
- the aramid fiber for example, an aromatic polyamide fiber (pulp type) having a specific surface area that is an index of fibrillation degree of 6 m 2 / g or more and 12 m 2 / g or less is used. This is because if the specific surface area of the aramid fiber is less than 6 m 2 / g, the tensile strength and buckling fatigue surface pressure of the joint sheet and hence the gasket formed therefrom cannot be sufficiently increased. If the specific surface area exceeds 12 m 2 / g, the aramid in the raw material This is because it is difficult to disperse the fibers.
- the silica particles having a primary particle diameter of 32 nm or more and 48 nm or less are used. This is because if the silica particles having a primary particle diameter of less than 32 nm and more than 48 nm are used, the axial force reduction rate of the joint sheet and thus the gasket formed therefrom is increased.
- the said acicular dolomite uses an average particle diameter of 4 micrometers or more and 12 micrometers or less. This is because if the average particle diameter of the acicular dolomite is less than 4 ⁇ m, the joint sheet and thus the tensile strength and buckling fatigue pressure of the gasket formed therefrom cannot be sufficiently increased, and if it exceeds 12 ⁇ m, the surface of the joint sheet becomes rough. .
- the reinforcing fibers composed of 4 to 8 wt% aramid fibers and 10 to 20 wt% acicular dolomite are entangled during mixing to maintain high flexibility of the joint sheet.
- the strength is increased, the sealing performance can be ensured even if fretting occurs in a structure such as a housing or a cover.
- the strength is not improved by increasing the composition amount of the reinforcing fiber or increasing the fiber length of the reinforcing fiber, the raw material cost of the gasket can be kept low, and the gasket surface can be smoothed and the sealing performance is sufficient. Since the strength of the joint sheet is not improved by increasing the roll pressure or the temperature of the hot roll when the joint sheet is laminated, the joint sheet hardness can be kept low, and the gasket against repeated compressive stress can be maintained. As a result, it is possible to prevent the deterioration of the sealing performance due to the buckling fatigue of the gasket.
- a gasket such as a vehicle seat gasket formed by cutting the joint seat 1 of this embodiment into a predetermined contour shape
- the rigidity of the structure such as a transmission
- the structure for example, the housing
- excellent sealing durability can be exhibited even if a large force is applied to the structure. That is, when the rigidity of the structure is low, the surface pressure generated in the gasket insertion portion is high immediately below and in the vicinity of the fastening bolt, but is low between the spans of the fastening bolt. For this reason, the gasket to be inserted into the gasket insertion portion is required to have high buckling resistance and good flexibility sealing properties.
- these high values are required. It is possible to provide buckling resistance and sealability with good flexibility.
- the above-described characteristics of the gasket such as a vehicle seat gasket formed by using the joint sheet 1 of this embodiment, conversely, the pitch of the fastening bolt or the like when designing the portion of the structure to be sealed with the gasket.
- the degree of freedom such as the size and the cover thickness can be increased, and the weight of the structure can be reduced.
- Joint sheets were prepared by changing the blending ratio of aramid fiber, acicular dolomite, silica, rubber, and inorganic filler as in Comparative Examples 1 to 8 shown in Table 1 and Examples 1 to 12 of the present invention. The performance was confirmed by the tensile strength, the axial force decrease rate, and the limit seal pressure test.
- Tensile test A tensile test was performed under the conditions defined in JIS K 6251.
- Table 1 shows the results of a tensile test, an axial force drop test, and a limit seal pressure measurement test performed on the joint sheets under the above-described conditions. From these results, Examples 1 to 16 are general examples. As a result, it was confirmed that the gasket material had good characteristics with a tensile strength of 16 MPa or more, a limit sealing performance of 0.7 MPaMP or more, and an axial force reduction rate of 12% or less. On the other hand, Comparative Examples 1 to 8 did not satisfy any one or more of the tensile strength of 16 MPa or more, the limit sealing performance of 0.7 MPa or more, and the axial force decrease rate of 12% or less.
- the basic composition of the joint sheet is NBR: 16 to 28 wt%, more preferably 16 to 24 wt%, Aramid fiber: 4-8 wt%, more preferably 4-6 wt%, Acicular dolomite: 10-20 wt%, Silica particles: 8-20 wt%, more preferably 10-15 wt%, It is preferable that it consists of an inorganic filler: remainder.
- FIG. 2 shows the result of a tensile test performed in the same manner as described above with the specific surface area serving as an index of the fibrillation degree of the aramid fibers changed for the joint sheet 1 of the above embodiment.
- the fibrillation degree of the aramid fiber is 6 m 2 / g or more and the tensile strength of the joint sheet 1 is 16 MPa or more.
- the specific surface area of the aramid fiber is desirably 6 m 2 / g or more, and 6 to 12 m 2 / g is effective.
- FIG. 3 shows the results of the axial force reduction rate test performed in the same manner as described above with the silica particle diameter varied for the joint sheet 1 of the above embodiment.
- the axial force reduction rate of the joint sheet 1 is reduced to 12% or less when the silica particle diameter is 32 to 50 nm.
- the silica particle size is desirably 32 nm or more, and 32 to 50 nm is effective.
- FIG. 4 shows the result of performing a tensile test in the same manner as described above with the needle-shaped dolomite particle diameter varied for the joint sheet 1 of the above embodiment.
- the particle diameter of the acicular dolomite is 4.0 ⁇ m or more, and the tensile strength of the joint sheet 1 is 16 MPa or more. Therefore, it was found that the particle size of acicular dolomite is preferably 4.0 ⁇ m or more, and 4 to 12 ⁇ m is effective.
- this invention is not limited to the above-mentioned example, It can change suitably within the description range of a claim.
- the reinforcing fiber composed of 4 to 8 wt% aramid fiber and 10 to 20 wt% acicular dolomite is entangled during mixing while maintaining the flexibility of the joint sheet high. Since the strength is increased, the sealing performance can be ensured even if fretting occurs in a structure such as a housing or a cover.
- the strength is not improved by increasing the composition amount of the reinforcing fiber or increasing the fiber length of the reinforcing fiber, the raw material cost of the gasket can be kept low, and the gasket surface can be smoothed and the sealing performance is sufficient. Since the strength of the joint sheet is not improved by increasing the roll pressure or the temperature of the hot roll when the joint sheet is laminated, the joint sheet hardness can be kept low, and the gasket against repeated compressive stress can be maintained. As a result, it is possible to prevent the deterioration of the sealing performance due to the buckling fatigue of the gasket.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Gasket Seals (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
Description
(引張試験)
JIS K 6251に規定された条件で引張試験を行った。
(軸力低下率試験)
限界シール圧試験用治具にジョイントシートをボルト軸力500kgfで締め付けて挟み込み、その後、電気炉にセットして、150℃×32時間経過後の軸力低下率をストレインゲージで測定した。
(限界シール圧試験)
ボルトスパン100mm、M6×4本の正方形の治具に、その輪郭に沿った正方形の枠状のジョイントシートをボルトトルク11.8Nmで挟み込み、150℃×32時間加熱し、冷却後に枠状のジョイントシートの内側をオイルで加圧して洩れの有無を調査した。 Joint sheets were prepared by changing the blending ratio of aramid fiber, acicular dolomite, silica, rubber, and inorganic filler as in Comparative Examples 1 to 8 shown in Table 1 and Examples 1 to 12 of the present invention. The performance was confirmed by the tensile strength, the axial force decrease rate, and the limit seal pressure test.
(Tensile test)
A tensile test was performed under the conditions defined in JIS K 6251.
(Axial force decrease rate test)
The joint sheet was clamped and clamped to a limit seal pressure test jig with a bolt axial force of 500 kgf, then set in an electric furnace, and the axial force decrease rate after elapse of 150 ° C. × 32 hours was measured with a strain gauge.
(Limit seal pressure test)
Bolt span 100mm, M6 x 4 square jigs with a square frame-shaped joint sheet along the contour of them with a bolt torque of 11.8Nm, heated at 150 ° C for 32 hours, after cooling, frame-shaped joints The inside of the seat was pressurized with oil and examined for leaks.
NBR:16~28wt%、より好ましくは16~24wt%と、
アラミド繊維:4~8wt%、より好ましくは4~6wt%と、
針状ドロマイト:10~20wt%と、
シリカ粒子:8~20wt%、より好ましくは10~15wt%と、
無機フィラー:残部とからなることが好ましい。 As is clear from Table 1, the basic composition of the joint sheet is
NBR: 16 to 28 wt%, more preferably 16 to 24 wt%,
Aramid fiber: 4-8 wt%, more preferably 4-6 wt%,
Acicular dolomite: 10-20 wt%,
Silica particles: 8-20 wt%, more preferably 10-15 wt%,
It is preferable that it consists of an inorganic filler: remainder.
1a 主層
1b 表層 1 Joint sheet (gasket material)
Claims (6)
- ゴムと補強繊維と充填材とを混合した原料をカレンダーロールで加圧積層および加硫して形成したジョイントシートからなるガスケット素材において、
前記原料の基本組成が、
ゴムとしてのNBR:16~28wt%と、
補強繊維としてのアラミド繊維:4~8wt%と、
補強繊維としての針状ドロマイト:10~20wt%と、
充填材としてのシリカ粒子:8~20wt%と、
充填材としての無機フィラー:残部と、
からなることを特徴とするガスケット素材。 In the gasket material consisting of the joint sheet formed by pressing and laminating and vulcanizing the raw material mixed with rubber, reinforcing fiber and filler with calender roll,
The basic composition of the raw material is
NBR as rubber: 16-28 wt%
Aramid fiber as reinforcing fiber: 4-8 wt%,
Acicular dolomite as a reinforcing fiber: 10 to 20 wt%,
Silica particles as filler: 8 to 20 wt%
Inorganic filler as filler: the remainder,
A gasket material characterized by comprising: - 前記アラミド繊維は、フィブリル度が比表面積(BET)で6~12m2/gのものであることを特徴とする、請求項1記載のガスケット素材。 The gasket material according to claim 1, wherein the aramid fiber has a fibrillation degree of 6 to 12 m 2 / g in specific surface area (BET).
- 前記シリカ粒子は、一次粒子径が32~48nmのものであることを特徴とする、請求項1記載のガスケット素材。 The gasket material according to claim 1, wherein the silica particles have a primary particle diameter of 32 to 48 nm.
- 前記針状ドロマイトは、平均粒子径が4~12μmのものであることを特徴とする、請求項1記載のガスケット素材。 The gasket material according to claim 1, wherein the acicular dolomite has an average particle diameter of 4 to 12 µm.
- 請求項1から4までの何れか1項記載のガスケット素材を用いた車両用シートガスケット。 A vehicle seat gasket using the gasket material according to any one of claims 1 to 4.
- 前記シートガスケットは、表層と、前記ガスケット素材からなる主層との2層構造を有することを特徴とする、請求項1から4までの何れか1項記載のガスケット素材を用いた請求項5記載の車両用シートガスケット。 The said sheet | seat gasket has a two-layer structure of a surface layer and the main layer which consists of the said gasket raw material, The gasket raw material in any one of Claim 1 to 4 characterized by the above-mentioned. Vehicle seat gasket.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0913307-0A BRPI0913307B1 (en) | 2008-05-23 | 2009-05-22 | gasket material and gasket sheet for a vehicle |
CN2009801187741A CN102037262B (en) | 2008-05-23 | 2009-05-22 | Gasket material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008135150A JP5065154B2 (en) | 2008-05-23 | 2008-05-23 | Gasket material |
JP2008-135150 | 2008-05-23 |
Publications (1)
Publication Number | Publication Date |
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WO2009142292A1 true WO2009142292A1 (en) | 2009-11-26 |
Family
ID=41340218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/059421 WO2009142292A1 (en) | 2008-05-23 | 2009-05-22 | Gasket material |
Country Status (4)
Country | Link |
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JP (1) | JP5065154B2 (en) |
CN (1) | CN102037262B (en) |
BR (1) | BRPI0913307B1 (en) |
WO (1) | WO2009142292A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2014024698A1 (en) * | 2012-08-09 | 2014-02-13 | Nok株式会社 | Nbr composition |
WO2019103113A1 (en) * | 2017-11-24 | 2019-05-31 | Nok株式会社 | Gasket material |
CN108178855A (en) * | 2017-12-29 | 2018-06-19 | 浙江天铁实业股份有限公司 | High-mechanic level crossing plate material and preparation method thereof |
JP7443023B2 (en) * | 2019-10-30 | 2024-03-05 | 花王株式会社 | Water-disintegrable cleaning products |
CN113402872B (en) * | 2021-07-29 | 2022-07-15 | 公牛集团股份有限公司 | Spraying-free material with terrazzo effect and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0274546A (en) * | 1988-09-09 | 1990-03-14 | Kubota Ltd | Extrusion molding of inorganic product |
JP2002105437A (en) * | 2000-10-04 | 2002-04-10 | Honda Motor Co Ltd | Composite sheet gasket |
JP2004036808A (en) * | 2002-07-05 | 2004-02-05 | Nippon Leakless Corp | Gasket material |
JP2004035806A (en) * | 2002-07-05 | 2004-02-05 | Nippon Leakless Corp | Gasket raw material |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1051832C (en) * | 1995-07-31 | 2000-04-26 | 舟山市海山密封材料有限公司 | Sealing washer special for engine of motorcycle and production technology of same |
CN100453857C (en) * | 2002-07-05 | 2009-01-21 | 日本利克雷斯工业株式会社 | Gasket raw material |
CN100422604C (en) * | 2002-07-05 | 2008-10-01 | 日本利克雷斯工业株式会社 | Gasket raw material |
CN1247680C (en) * | 2004-11-16 | 2006-03-29 | 南京工业大学 | Non-asbestos hybrid fiber reinforced rubber-based sealing composite material and manufacturing process thereof |
JP4746879B2 (en) * | 2005-01-12 | 2011-08-10 | ニチアス株式会社 | Non-asbestos-based sheet gasket |
JP2007092904A (en) * | 2005-09-29 | 2007-04-12 | Nichias Corp | Sheet gasket and its manufacturing method |
JP2007239901A (en) * | 2006-03-09 | 2007-09-20 | Nichias Corp | Method of manufacturing sheet like gasket |
-
2008
- 2008-05-23 JP JP2008135150A patent/JP5065154B2/en not_active Expired - Fee Related
-
2009
- 2009-05-22 CN CN2009801187741A patent/CN102037262B/en active Active
- 2009-05-22 WO PCT/JP2009/059421 patent/WO2009142292A1/en active Application Filing
- 2009-05-22 BR BRPI0913307-0A patent/BRPI0913307B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0274546A (en) * | 1988-09-09 | 1990-03-14 | Kubota Ltd | Extrusion molding of inorganic product |
JP2002105437A (en) * | 2000-10-04 | 2002-04-10 | Honda Motor Co Ltd | Composite sheet gasket |
JP2004036808A (en) * | 2002-07-05 | 2004-02-05 | Nippon Leakless Corp | Gasket material |
JP2004035806A (en) * | 2002-07-05 | 2004-02-05 | Nippon Leakless Corp | Gasket raw material |
Also Published As
Publication number | Publication date |
---|---|
CN102037262B (en) | 2013-10-16 |
JP2009281524A (en) | 2009-12-03 |
BRPI0913307A2 (en) | 2019-09-10 |
BRPI0913307B1 (en) | 2020-06-30 |
CN102037262A (en) | 2011-04-27 |
JP5065154B2 (en) | 2012-10-31 |
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