Abstract: A rubber-metal laminate that includes a metal member; and a rubber layer provided on the metal member, wherein the rubber layer has a 100%-modulus value in accordance with JIS K6251 of 6.0 MPa or more and a thickness of less than 80 µm. The gasket includes the rubber-metal laminate.

Abstract: A conductive roller includes a base including an outer surface along and about an axial line thereof, and a surface layer arranged on the outer surface of the base. The surface layer includes particles. The ten-point height of irregularities Rz of the outer surface of the base is greater than or equal to 6.0 micrometers and less than or equal to 8.0 micrometers. A ten-point height of irregularities Rz of an outer surface of the surface layer is greater than or equal to 5.5 micrometers and less than or equal to 8.5 micrometers. The base included in the conductive roller preferably includes a core member and a conductive elastic layer arranged between the core member and the surface layer. The surface layer preferably includes a conductive portion including a resin material and a conductive agent.

Abstract: A method of manufacturing a micro flow path device includes: arranging a cover film on a surface of a base film on which an electrode pattern made of a metallic thin film has been formed and obtaining a flow path forming laminate; punching the obtained flow path forming laminate along a shape of a flow path so as to cut a part of the electrode pattern and forming a punched portion in which at least a pair of opposite electrodes are exposed to a part of the punched cut surface; and disposing a first planar member, defining a bottom surface of the flow paths on a back surface side of the flow path forming laminate on which the punched portion has been formed and disposing a second planar member defining a top surface of the flow path on a front surface side of the flow path forming laminate.

Abstract: A conductive roller includes: a core member including an outer surface along and about an axial line thereof; and a surface layer arranged along the outer surface of the core member. The surface layer includes a conductive portion, and a surface roughness imparting material in a form of particles dispersed in the conductive portion. An average particle size of the surface roughness imparting material is in a range of 6 micrometers or greater and less than 10 micrometers. The number of particles of the surface roughness imparting material per unit area of the surface layer is in a range of 3.5×105 particles per mm2 or greater and 7.5×105 particles per mm2 or less. An average thickness of the surface layer is in a range of 0.2 micrometers or greater and 5.5 micrometers or less.

Abstract: An acrylic rubber composition that includes a blend product of an acrylic rubber [I] containing a copolymer of an ethyl acrylate/n-butyl acrylate/2-methoxyethyl acrylate/carboxyl group-containing vinyl monomer, and an acrylic rubber [II] containing a copolymer of an alkoxyalkyl acrylate/2-ethylhexyl acrylate/alkyl methacrylate/ethyl acrylate/carboxyl group-containing vinyl monomer; the blend product being compounded with silica and a plasticizer.

Abstract: A ball joint and a dust cover in which a stable sealing function can be provided even when a space for disposing the dust cover is small are provided. The dust cover includes a deformable body portion, a fixed portion which is provided on one end side of the body portion and is fixed to a socket, and a seal portion provided on the other end side of the body portion. The seal portion has a main seal part which is provided to be slidable relative to a spherical portion side flange and an opposite side flange while sandwiched therebetween. The maximum length of the main seal part in a central axis direction in a state in which no external force is applied thereto is longer than a distance between opposing surfaces of the spherical portion side flange and the opposite side flange, where the central axis direction is a direction in which a central axis of the dust cover extends in a state in which no external force is applied thereto.

Abstract: A fluororubber composition comprising 5 to 30 parts by weight of carbon black having an iodine adsorption of 70 mg/g or more, 5 to 20 parts by weight of carbon fiber having an average fiber diameter of 5 to 20 ?m and an aspect ratio of 2 to 10, and 3 to 20 parts by weight of PTFE, based on 100 parts by weight of fluororubber. The crosslinked molded article obtained from the fluororubber composition exhibits excellent effects of imparting oil film retention by using carbon fiber with specific properties, and improving abrasion resistance in unlubricated conditions by using the carbon fiber in combination with PTFE as a solid lubricant.

Abstract: A developing roll used in an electrophotographic image forming apparatus has a metal core member, an elastic layer made of a rubber disposed around the core member, and a surface layer disposed around the elastic layer. The texture aspect ratio of the surface Str of the surface layer is equal to or greater than 0.55.

Abstract: A developing roll has a metal core, an elastic layer, and a surface layer, A value X is 65.6 N/mm3 or more and a value Y is 229 ?m or more. The value X is P1/(D2×A) P2/(D2× A). P1 is the load to displace the roll by 100 ?m when a metal probe is pressed against the roll. D1 is the displacement of the roll caused by the probe under the load P1. A is the area of the probe. P2 is the load to displace a material roll by 100 ?m when the probe is pressed against the material roll with the core and the elastic layer and without the surface layer. D2 is the displacement of the material roll caused by the probe under the load P2. The value Y is the displacement of the developing roll when the probe pierces the surface layer.

Abstract: A sealing apparatus which is capable of preventing static leakage of a target to be sealed without increasing sliding resistance with respect to a shaft, and a surface processing method of a disk member of the sealing apparatus which is capable of processing a surface of the disk member, such as a slinger, provided at the sealing apparatus. A surface processing method of a disk member of a sealing apparatus for forming a plurality of fine spiral grooves on a surface of the disk member provided at the sealing apparatus has a grinding member having a plurality of fine projections that is moved to an outer edge side while the grinding member is pressed against the surface of the disk member which relatively rotates around an axis, and the sealing apparatus includes a slinger at which a plurality of fine spiral grooves are randomly formed on another side surface of a flange portion.

Abstract: An NBR composition that includes, based on 100 parts by weight of NBR, 0.2 to 0.7 parts by weight, preferably 0.2 to 0.5 parts by weight, of stearic acid, and paraffin wax, which has the melting start temperature of 65° C., in an amount equal to 2 to 6 times the amount of said stearic acid, and preferably further zinc oxide and a UV resistant antioxidant. The NBR composition has improved ozone resistance using stearic acid and paraffin wax, which are generally compounded in NBR compositions, while neither affecting the material physical properties or product appearance, nor increasing the compounding amount of an ozone resistant antioxidant.

Abstract: An identification structure for components of a clutch piston mechanism capable of facilitating distinction of types of the components of the clutch piston mechanism. The identification structure for components of the clutch piston mechanism according to an embodiment of the present invention includes an identifying part that is provided to a piston seal as a component of the clutch piston mechanism and is used for identifying the piston seal. The identifying part has a pattern formed by differences in surface roughness.

Abstract: A gasket and a sealing structure that are capable of stabilizing posture of the gasket installed in a narrow space. A gasket main body has: an annular lip portion pressed by a facing surface of a second member facing a first member so that the lip portion is in close contact with the facing surface while being bent inward; a first annular protrusion in close contact with an end surface of the mount portion facing the second member; and a second annular protrusion provided inward with respect to the first annular protrusion and in close contact with the end surface.

Abstract: Two or more target points different in amplitude in a natural mode, which exist in a housing of an object to be damped such as an engine, a gearbox, motors, or the like are located. Among these target points, an arm is fixed at a position relatively small in amplitude, and a vibration absorber provided at the free end of the arm is pressed against a position (relatively large in amplitude. When vibrations occur in the object, the vibration absorber holds the target point relatively large in amplitude while the arm is following the vibrations of the target.

Abstract: A rubber-metal laminate that includes a metal member; and a rubber layer provided on the metal member, wherein the rubber layer has a 100%-modulus value in accordance with JIS K6251 of 8.5 MPa or more and a thickness of 80 ?m or more. A gasket that includes the rubber-metal laminate.

Abstract: The seal ring is annular around an axis x and includes an annular outer peripheral surface facing an outer periphery side, and a plurality of recessed parts. The recessed parts are formed in such a way as to be spaced apart from each other in a circumferential direction and are recessed from the outer peripheral surface toward an inner periphery side. The recessed parts expand, in the axis x direction, from one side surface to a position which does not reach another side surface. The outer peripheral surface includes a annular contact surface between the another side surface and the position, and rib surfaces respectively between mutually neighboring recessed parts in the circumferential direction. Each of the rib surfaces extends between the one side surface and the position in the axis x direction.

Abstract: An NBR composition, that is excellent in rubber material processability and vulcanized rubber hardness, comprising 93 to 105 parts by weight of carbon black with a carbon black grade of N330 or N550, 1.0 to 4.0 parts by weight of a vulcanization retarder, 2.0 to 5.0 parts by weight of thiazole-based and thiuram-based vulcanization accelerators, and 1.0 to 4.0 parts by weight of a sulfur-based vulcanizing agent, based on 100 parts by weight of NBR. The vulcanized molded product obtained from the NBR composition has a rubber hardness (Duro A, instant) of 85 or more according to JIS K6253 corresponding to ISO 18517, and can be effectively used as an automobile buffer material such as a stopper for electric power steering, a buffer material for nailers, a buffer material for devices equipped with hydraulic cylinders, or the like.

Abstract: A seal ring is an annular seal ring which is configured to be interposed between first and second members, and seals a gap between the first and second members. The second member is inserted into the first member, and reciprocates in its axial direction with respect to the first member. The seal ring includes an annular base part, an annular innermost end part, and a widening protrusion part. The annular base part has a radially exterior end to contact the first member. The annular innermost end part is integrally formed with a radially interior end of the base part to contact the second member. The widening protrusion part is integrally formed with the innermost end part, and protrudes with respect to the base part in the axial direction of the second member.

Abstract: An acrylic rubber composition comprising 5 to 15 parts by weight of a plasticizer having a solubility parameter SP value (by Small's method) of 8.5 to 10.5 based on 100 parts by weight of super cold resistant grade acrylic rubber having a glass transition point Tg of ?42° C. or less, wherein the acrylic rubber composition can give a vulcanizate with the TR10 value, which is an index of cold resistance, of ?42° C. or less both initially and after oil dipping. In the acrylic rubber composition, first, the ratio of an acrylate monomer that constitutes acrylic rubber is adjusted, thereby the low temperature characteristics can be maintained even in an oil contact environment. This intentionally reduces the oil resistance of the vulcanized rubber molded product, thereby increasing the amount of oil swelling into the vulcanized rubber molded product and improving the flexibility in a low temperature environment.

Abstract: A seal ring has, on an outer peripheral surface side thereof, a pair of recessed parts 140 extending in a circumferential direction on both sides in a width direction thereof to form a projection part 120 between the pair of recessed parts 140, and has a plurality of ribs 130 connected to the projection part 120 and extending to lateral surfaces of the seal ring at intervals in the circumferential direction inside the pair of recessed parts 140, and a plurality of ribs 130 arranged on a sealed region side among the plurality of ribs 130 have lateral-wall surfaces on an upstream side in a relative rotation direction of a housing with respect to a shaft, each of the lateral-wall surfaces having inclined surfaces inclined from the upstream side to a downstream side in the relative rotation direction of the housing from the projection part 120 toward the lateral surfaces of the seal ring.