Abstract: A wrapped V-belt B is wrapped around a pulley to transmit power, and includes a belt body, and a reinforcing cloth wrapping the belt body. At least part of the belt body is made of a rubber composition containing ethylene-?-olefin elastomer as a polymer component. The polymer component contains the ethylene-?-olefin elastomer within a range of 30 to 100% by mass, in which an ethylene content falls within a range of 40 to 56% by mass.

Abstract: There is provided a core wire for a transmission belt that is capable of exerting sufficient performance for use when it is used as a transmission belt and substantially controlling occurrence of noises. There is also provided a transmission belt that is capable of exerting sufficient performance for use and substantially controlling occurrence of noises.

Abstract: It is an object of the present invention to provide a friction transmission belt which is superior in adhesive properties such as dynamic adhesion and heat resistant adhesion on repeated flexing of a friction transmission belt or on running under heating conditions around an engine, and is also superior in desired performance such as heat resistance, abrasion resistance and an abnormal noise-preventing property.

Abstract: A belt fabric which is provided at a part of a power transmission belt on which frictional forces act is formed by dipping into a rubber solution prepared by dissolving a non cross-linked hydrogenated nitrile rubber composition, mixed with a polyethylene powder having a molecular weight in excess of 1 million and an organic peroxide as a cross-linking agent, in a solvent.

Abstract: In a power transmission belt having a belt body made of a rubber composition, a belt cloth is provided at a friction force acting part of the belt body. The belt cloth is subjected to dipping treatment in a treatment solution obtained by dissolving into a solution a rubber composition in which uncrosslinked ethylene-?-olefin elastomer is mixed with a metal salt of unsaturated carboxylic acid and an organic peroxide as a crosslinking agent.

Abstract: A belt fabric which is provided at a part of a power transmission belt on which frictional forces act is formed by dipping into a rubber solution prepared by dissolving a non cross-linked hydrogenated nitrile rubber composition, mixed with a polyethylene powder having a molecular weight in excess of 1 million and an organic peroxide as a cross-linking agent, in a solvent.

Abstract: In a V-ribbed belt, cords made of polyester fibers are embedded into an adhesion rubber layer made of chlorosulfonated polyethylene rubber whose polymer ingredient is so compounded that the content of chlorine is 15 to 35 wt. % and the content of sulfur is 0.5 to 2.5 wt. %, thereby reinforcing the adhesion rubber layer. The cords are treated with two kinds of adhesives. A first adhesive for first treatment is an adhesive having at least one of an isocynate compound and an epoxy compound. A second adhesive for second treatment is an adhesive formed of a mixture having at least resorcineformaldehyde resin and 2,3-dichlorobutadiefie-contained polymer. A surfactant is added to the second adhesive so that the cords and the adhesion rubber layer are Securely adhered, thereby enhancing dynamic adhesive strength of the V-ribbed belt.

Abstract: A facing fabric covering tooth faces of tooth rubber layers of a belt body is treated with a rubber composition in which hydrogenated acrylonitrile-butadiene rubber is mixed with N,N'-m-phenylenedimaleimide.