Abstract: A rubber member for coating a developing roll which is obtained by coating a coating layer component around a developing roll having a rubber substrate layer and curing the coating layer component is described. The coating layer component contains: (A) a liquid binder containing at least a polyol, an isocyanate compound and reactive silicone oil; (B) silicone rubber particles having a hardness according to JIS K6253: 1997 by Durometer A, measured instantaneously, of 20 to 80 degrees, and a rubber particle size of 0.2 to 10 pm; and a diluting solvent. A ratio of a thickness of the coating layer after curing and a particle size of the rubber satisfies: the rubber particle size/a coating layer thickness <0.3.

Abstract: An acrylic rubber composition comprising 5 to 80 parts by weight, preferably 10 to 60 parts by weight, more preferably 20 to 40 parts by weight, of a styrene-based resin, based on 100 parts by weight of acrylic rubber. A vibration insulation member having an excellent tan ? value at a high temperature and improved vibration insulation properties can be molded by adding a specific ratio of a styrene-based resin to acrylic rubber. This acrylic rubber composition can be effectively used as a molding material for a mount, a grommet, or the like in the vicinity of an automobile engine used in a high temperature environment.

Abstract: An adhesive composition for oil bleeding silicone rubber comprising any of: (A) an alcohol-based organic solvent solution adding 45 to 120 parts by weight of organometallic compound and 2 to 10 parts by weight of water, based on 100 parts by weight of vinyltrialkoxysilane, (B) a solution in which 5 parts by weight or less, preferably 1 to 5 parts by weight, of 3-aminopropyltrialkoxysilane is added to the above alcohol-based organic solvent solution (A), or (C) a solution in which uncrosslinked silicone rubber dissolved beforehand in an organic solvent is added to the above alcohol-based organic solvent solution (A) or (B) in which the amount of the organometallic compound is changed to 5 to 20 parts by weight, at a ratio of 0.1 to 5 wt. %, based on the total solid matters of vinyltrialkoxysilane and the organometallic compound. The adhesive composition has excellent adhesion to various substrates, including metals.

Abstract: A hydrogenated nitrile rubber composition and a drivetrain oil seal whereby seal squeal can be prevented even upon wearing away of the sealing or even under dry lubrication conditions without any grease. The hydrogenated nitrile rubber composition comprises 100 parts by weight of hydrogenated nitrile rubber and further 10 to 55 parts by weight of wollastonite and 10 to 55 parts by weight of graphite as fillers, the total amount of the fillers being 50 to 110 parts by weight. The drivetrain oil seal comprises a crosslinked product of the hydrogenated nitrile rubber composition.

Abstract: A fiber-reinforced porous hollow fiber membrane comprising a hollow fiber membrane and a reinforcing fiber completely or partially embedded in the hollow fiber membrane; wherein the reinforcing fiber is placed in a portion that does not exceed 90%, preferably 80%, of the thickness of the hollow fiber membrane as viewed from an inner or outer peripheral surface of the hollow fiber membrane on a side that is not a side of the porous hollow fiber membrane to come in contact with an object to be treated, and preferably at least 50 volume % of the cross section of the reinforcing fiber is embedded in the hollow fiber membrane. The obtained fiber-reinforced porous hollow fiber membrane has excellent permeability, separation performance, and mechanical properties.

Abstract: Provided are a halogenated butyl rubber composition which can be made low in hardness, being excellent in damping property and having excellent balance of the physical properties among kneading, roll-processing and crosslinking, and a vibration-insulating grommet using the halogenated butyl rubber composition. The halogenated butyl rubber composition contains 100 parts mass of halogenated butyl rubber and 3 to 20 parts mass of liquid unsaturated polybutadiene, and preferably further contains 0.1 to 5 parts mass of fatty acid amide. The halogenated butyl rubber composition is suitable for producing a vibration-insulating grommet.

Abstract: A sealing device includes a metal ring, a main lip, an annular elastic body, a sliding ring, and biasing means. The metal ring is hermetically fixed to a housing. The main lip is bonded to the metal ring and is slidably in close contact with an outer periphery surface of a rotating body inserted through an inner circumference of the housing. The annular elastic body is bonded to the metal ring on an outer side of the main lip, and stretchable in an axial direction. The sliding ring is provided at an end portion of the annular elastic body on a side opposite the metal ring, and is slidably in close contact with a seal flange attached to an outer periphery of the rotating body. The biasing means is configured to elastically press the sliding ring against the seal flange, thereby maintaining stable sealability over an extended period of time.

Abstract: A seal ring (100) is attached to an annular groove (210) provided on an outer periphery of a shaft (200), and slides on a lateral wall surface (211) of the annular groove (210) on a lower pressure side. The seal ring (100) includes: a dynamic pressure generation groove (120) that generates dynamic pressure with sealed fluid introduced thereinto, the dynamic pressure generation groove (120) being provided in a sliding region X of a lateral surface (111) thereof on the lower pressure side in which the lateral surface (111) slides on the lateral wall surface (211); and an introduction hole (130) that has an opening (131) at a position away from the lateral surface (111) of an inner peripheral surface (112) of the seal ring (100) by a distance Y, communicates with the dynamic pressure generation groove (120), and introduces the sealed fluid into the dynamic pressure generation groove (120).

Abstract: An object is to provide a metal surface treatment agent which can be coated by screen printing, and can be effectively used for metal surface treatment at the time of forming a rubber-metal complex excellent in water resistance and heat resistance, and the object can be solved by a metal surface treatment agent which comprises an organometallic compound, silica, magnesium silicate hydrate, and an organic solvent represented by the following general formula (I): R—O—(CH2)2OH??General formula (I) [wherein R represents an alkyl group having 3 or more carbon atoms or an aryl group.

Abstract: A rubber metal adhesive can be coated by screen printing, and can be effectively used for metal surface treatment at the time of forming a rubber-metal complex excellent in water resistance and heat resistance. The rubber metal adhesive comprises an organometallic compound, silica, magnesium silicate hydrate, and an organic solvent represented by the following general formula (I): R—O—(CH2)2OH??General formula (I) [wherein R represents an alkyl group having 3 or more carbon atoms or an aryl group.

Abstract: A seal ring includes, on a side of a sliding surface thereof, a groove part (120) having a first groove (121) extending in a circumferential direction thereof and a second groove (122) extending from a central position of the first groove (121) in the circumferential direction to an inner peripheral surface and guiding sealed fluid into the first groove (121), the first groove (121) having dynamic pressure generation grooves (121a) configured to have a groove bottom made shallower at an end thereof in the circumferential direction than at a center thereof in the circumferential direction, and a foreign matter catching groove (121b) that has a groove bottom deeper than the groove bottoms of the dynamic pressure generation grooves (121a) and is capable of catching foreign matter, and the first groove (121) being provided at a position that falls within a sliding region in which the seal ring slides on the lateral wall surface.

Abstract: An acrylic rubber composition comprising 5 to 80 parts by weight, preferably 10 to 60 parts by weight, more preferably 20 to 40 parts by weight, of a styrene acrylic-based resin containing a functional group other than a carboxyl group, based on 100 parts by weight of acrylic rubber. A vibration insulation member having an excellent tan ? value at a high temperature and improved vibration insulation properties can be molded by adding a specific ratio of a styrene acrylic-based resin to acrylic rubber. This acrylic rubber composition can be effectively used as a molding material for a mount, a grommet, or the like in the vicinity of an automobile engine used in a high temperature environment.

Abstract: The invention provides a method for manufacturing a substrate-integrated gasket, the method integrating a fiber substrate which is constructed by a pulp fiber having cellulose as a main component and a gasket body which is constructed by a rubber-like elastic body according to a rubber impregnation, wherein a plurality of substrate-integrated gaskets are obtained by executing an injection molding by plural stages of rubber metal molds. Further, the rubber material is filled in plural stages of metal mold cavities by passing the rubber material through the fiber substrate in which a rubber material flow channel in the metal mold is closed at its injection pressure. The invention can reduce a man hour for removing burr and cleaning a metal mold by suppressing generation of rubber burr at the molding time and can reduce an amount of disposal of a molding material, thereby achieving a good manufacturing efficiency.

Abstract: A cleaning blade 1 includes an elastic body 11 that is a molded body of a rubber base material, and which has at least a surface treatment layer 12 in a portion of the elastic body 11, the portion coming into contact with an object to be contacted. The surface treatment layer 12 is formed by impregnating a surface portion of the elastic body 11 with a surface treatment liquid, which contains an isocyanate compound and an organic solvent, and curing the surface treatment liquid; the surface treatment layer 12 has an elastic modulus of 95 MPa or less; the elastic body 11 has an elastic modulus of from 20 MPa to 60 MPa (inclusive); and the difference between the elastic modulus of the surface treatment layer 12 and the elastic modulus of the elastic body 11 is 1 MPa or more.

Abstract: A gasket includes a reinforcing body made of a resin film, a one-side gasket body on one surface of the reinforcing body, and another-side gasket body on another surface of the reinforcing body. The reinforcing body has, between both gasket bodies, a three-dimensional shape in which the resin film is bent. The one-side gasket body includes an inversely-tapered engaging convex portion protruding toward the other-side gasket body, the reinforcing body includes a deformation portion as the three-dimensional shape deforming along a shape of the engaging convex portion, and the other-side gasket body includes an inversely-tapered engaging concave portion embedding therein the engaging convex portion and the deformation portion. At least one of the one-side gasket body and the other-side gasket body includes a flat surface-shaped seal surface, and the reinforcing body has a convex shape as the three-dimensional shape protruding toward the flat surface-shaped seal surface.

Abstract: A slinger of an oil seal has a thread groove carrying out a pumping action toward a diametrically outer side in an external side end surface of a flange portion. A lip seal member has a main lip, a rubber-like elastic dust lip and a rubber-like elastic intermediate lip. The intermediate lip directs a lip end to a machine inner side, comes into close contact with the slinger over a whole periphery with the lip end, and has annular first projections and circumferentially partial second projections in a facing portion to the slinger. The first projection has a structure which makes dust hard to pass through to the lip end by forming a micro gap in relation to the slinger. The second projection has a structure which properly keeps the micro gap under generation of eccentricity in a rotary shaft by having a higher portion than the first projection.

Abstract: It is an object of the present invention to provide a sealing structure for a casing that can reduce the number of used gaskets and achieve further weight reduction, with the sealing function of the gaskets secured. The object is solved by including: a case 2 having an opened top; a cover 3 attached to the top of the case 2 to form a fluid flow path therein; a center plate 5 interposed between the case 2 and the cover 3 and partitions an inner space into the side of the case 2 and the side of the cover 3; and a gasket 4, which is disposed between the case 2 and the cover 3, and forming the center plate 5 so as to have a size that is within an inner peripheral side relative to a sealing line 41 of the gasket 4 and stacking this center plate on the gasket 4, and attaching the cover 3 to the top of the case 2 with the stacked gasket 4 and center plate 5 sandwiched there between to compress the gasket 4 with the mutual butting surfaces between the case 2 and the cover 3.

Abstract: A method has the steps of forming a lot of potting portions made of a rubber-like elastic material at appropriate intervals in respect of an extending direction of the gasket main body in the one side in the thickness direction in the peripheral edge portion of the plate in such a manner as to be positioned in a forming area of the gasket main body, next, pinching a portion constructed by the peripheral edge portion of the plate and the potting portion between inner surfaces of a gasket forming cavity of the metal mold and bringing the other side in the thickness direction of the peripheral edge portion into close contact with the one inner surface of the cavity by positioning and arranging the plate within the metal mold and clamping the mold, and filling a liquid rubber material into the cavity and curing the liquid rubber material.

Abstract: A sealing device includes a seal ring 200 made of resin which is in close contact with a side wall surface on a low pressure side of an annular groove 410, and slides against an inner peripheral surface of a shaft hole in a housing 500 through which a shaft 400 is inserted. A metal spring 300 presses the seal ring 200 toward an outer peripheral surface side, wherein a concave portion 220 is formed on an outer peripheral surface of the seal ring 200 which extends from an end portion on a high pressure side of the outer peripheral surface to a position which does not reach an end portion on a low pressure side of the outer peripheral surface, and introduces a fluid from the high pressure side.