Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle ? of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.

Abstract: A raw edge V-belt includes: a compression rubber layer formed on an inner side of the belt and made of a rubber composition. The rubber composition contains a rubber component, fine cellulose fibers, and short fibers. The content of the short fibers in the rubber composition is 25 parts by mass or more and 45 parts by mass or less per 100 parts by mass of the rubber component, and the volume fraction of the short fibers in the rubber composition is 12.5 vol % or more.

Abstract: A V-ribbed belt includes a plurality of V-shaped ribs, each of the plurality of V-shaped ribs includes a V-shaped rib body formed from a rubber composition and a rib-side reinforcing fabric covering a surface of the V-shaped rib body, the rib-side reinforcing fabric is a woven fabric containing a first fiber and a second fiber, and in the woven fabric, at least either the first fiber or the second fiber is inclined relative to a longitudinal direction and a width direction of the belt.

Abstract: A toothed belt includes: a belt body having a flat band-shaped back rubber portion and tooth rubber portions placed on an inner circumferential side of the back rubber portion, the back rubber portion and the tooth rubber portions being each composed of a thermoplastic elastomer composition; a cord containing carbon filaments; and a tooth portion covering material provided on an inner circumferential side of the belt body and covering the tooth rubber portions. An elastomer component of the thermoplastic elastomer composition is a TPAE or a TPC, a hardness of the thermoplastic elastomer composition forming the back rubber portion is not less than 25 and not greater than 70, a hardness of the thermoplastic elastomer composition forming the tooth rubber portions is not less than 40 and not greater than 70, and the hardness of the thermoplastic elastomer composition forming the back rubber portion is not greater than the hardness of the thermoplastic elastomer composition forming the tooth rubber portions.

Abstract: A raw edge V-belt includes a belt body made of rubber and having pulley contact surfaces formed on both sides thereof in a belt width direction, and a cord embedded in the belt body, wherein a compressive elastic modulus of the raw edge V-belt in the belt width direction measured at 120° C. is not less than 150 MPa and not greater than 250 MPa, and a 90° coefficient of friction on a belt side surface of the raw edge V-belt is not less than 1.4 and not greater than 1.8.

Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle ? of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.

Abstract: A toothed belt includes a belt body made of a rubber composition. The rubber composition contains a hydrogenated nitrile rubber having a bound acrylonitrile content of 15% by mass or more and 30% by mass or less, has a hardness of A70 or more and A80 or less at a test temperature of 25° C., and has a cold resistance index of 0.25 or less after being heat-aged by being exposed to an atmosphere at a temperature of 140° C. for 144 hours, the cold resistance index being defined by the following formula (I): Cold ? Resistance ? Index = 5 ? % ? Modulus ? at ? Test ? Temperature ? of - 40 ? ° ? C . / ? Hardness ? at ? Test ? Temperature ? of ? 25 ? ° ? C .

Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle ? of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.

Abstract: The present invention addresses the problem of providing a surface protection film which provides an excellent writing sensation when a touch pen is used thereon and excellent scratch resistance against a touch pen. As a solution, provided is a surface protection film which has on the outermost surface thereof a protection layer formed of a polyurethane, wherein the polyurethane has an international rubber hardness degree (IRHD) of 87.0-98.0 and a tan ? peak value of 0.6 or more.

Abstract: The present invention addresses the problem of providing a surface-protective film which is excellent in terms of antiglare property, scratch resistance, and oil resistance. Provided as a means for solving the problem is a surface-protective film which comprises a protective layer constituted of a polyurethane, both surfaces of the protective layer being flat, and a hardcoat layer formed on one of the surfaces of the protective layer, wherein the hardcoat layer has an arithmetic average roughness Ra of equal to or greater than 0.1 and equal to or less than 0.8 ?m.

Abstract: A crosslinked rubber composition includes: a rubber component containing a first polymer which is an ethylene-?-olefin elastomer having an ethylene content of less than 60% by mass and a second polymer which is an ethylene-?-olefin elastomer having an ethylene content of 60% by mass or more; and short fibers dispersed in the rubber component. The rubber component is crosslinked by using organic peroxide as a crosslinking agent. The content of the organic peroxide in a not-yet crosslinked rubber composition is 1 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the rubber component.

Abstract: The present invention addresses the problem of providing a surface protection film for a flexible display with which films are not adhered to each other. As a solution, provided is the surface protection film for a flexible display that has a protection layer made of polyurethane as an outermost surface thereof, the polyurethane having a tan ? peak temperature of 20° C. or more.

Abstract: A toothed belt includes: a belt body having a flat band-shaped back rubber portion and tooth rubber portions placed on an inner circumferential side of the back rubber portion, the back rubber portion and the tooth rubber portions being each composed of a thermoplastic elastomer composition; a cord containing carbon filaments; and a tooth portion covering material provided on an inner circumferential side of the belt body and covering the tooth rubber portions. An elastomer component of the thermoplastic elastomer composition is a TPAE or a TPC, a hardness of the thermoplastic elastomer composition forming the back rubber portion is not less than 25 and not greater than 70, a hardness of the thermoplastic elastomer composition forming the tooth rubber portions is not less than 40 and not greater than 70, and the hardness of the thermoplastic elastomer composition forming the back rubber portion is not greater than the hardness of the thermoplastic elastomer composition forming the tooth rubber portions.

Abstract: The purpose of the present invention is to provide a developing roller which is not prone to scumming in a nonprinting area. The solution is to provide a developing roller which has an elastic layer, a coat layer formed on the elastic layer, and end portion coat layers formed on outermost surfaces on two axial end portions, wherein the end portion coat layer contains a conductive material.

Abstract: The present invention provides an optically clear adhesive sheet that prevents delay bubble generation and has a large thickness, a high adhesive strength to an adherend, a high capability to conform to the adherend, and excellent weather resistance; a laminate including the optically clear adhesive sheet; and a bonded structure including the optically clear adhesive sheet. The optically clear adhesive sheet includes, in the following order: a first surface-adhesive layer; an intermediate polyurethane layer; and a second surface-adhesive layer, the intermediate polyurethane layer containing a hindered amine-based light stabilizer, the optically clear adhesive sheet having a loss tangent at 85° C. of 0.25 or more and 0.6 or less, the intermediate polyurethane layer having a thickness of 100 ?m or greater and 2000 ?m or smaller.

Abstract: The purpose of the present invention is to provide a developing roller which is not prone to scumming in a nonprinting area. The solution is to provide a developing roller which has an elastic layer, a coat layer formed on the elastic layer, and end portion coat layers formed on outermost surfaces on two axial end portions, wherein the end portion coat layer contains a conductive material.

Abstract: A power transmission belt includes a belt body made of rubber and a cord embedded in the belt body. The belt body has a portion having the cord embedded therein, and the portion is made of a rubber composition having a storage normal modulus at 25° C. in a grain direction of 80 MPa or more and the ratio of the storage normal modulus at 25° C. in the grain direction to a storage normal modulus at 25° C. in a cross-grain direction of 1.20 or more to 2.50 or less. The rubber composition is arranged such that the grain direction corresponds to a belt length direction and the cross-grain direction corresponds to a belt width direction.

Abstract: Cover film has a base material layer and a surface layer chemically bonded to the base material layer, where the surface layer includes a polyurethane resin X1 containing urethane and urea units and a polyorganosiloxane group in the molecule, the polyurethane resin X1 is a reaction product of a non-yellowing-type isocyanate component B1 with an active hydrogen component A1 including a compound a1-1, the base material layer includes a polyurethane resin X2 having a urethane bond in the molecule, and the polyurethane resin X2 is a reaction product of a non-yellowing-type isocyanate component B2 with an active hydrogen component A2 which does not include the compound a1-1, and has a certain crosslinking point concentration and also has a certain elastic recovery rate.

Abstract: A grinding material includes a base sheet and a grinding layer overlaid on a front face side of the base sheet and including abrasive grains and a binder for the abrasive grains. The grinding layer includes the abrasive grains of a plurality of types. Of the abrasive grains of the plurality of types, provided that first abrasive grains have the largest average diameter and second abrasive grains have the second largest average diameter, the percentage of the average diameter of the second abrasive grains with respect to that of the first abrasive grains is 5-70%. The total content of the abrasive grains in the grinding layer is preferably 50-85% by volume. The content of the first abrasive grains in the grinding layer is preferably 1-25% by volume. The first abrasive grains are preferably diamond abrasive grains and the second abrasive grains are preferably alumina abrasive grains.

Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle ? of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.