The present invention relates to a process for adhering a textile material to an elastomer, the process comprising the steps of pretreating the textile material with at least one polyester of an --unsaturated carboxylic acid, contacting the pretreated textile material with an unvulcanized elastomer, and vulcanizing the product obtained. The present invention additionally encompasses an elastomer article obtainable by this process and also the use of a polyester of an --unsaturated carboxylic acid for improving the adhesion of a textile material to an elastomer.

A wrapped V-belt includes: a belt main body containing a compression layer containing a compression rubber layer and a fabric-laminated body layer a tension rubber layer and a tension member buried between the compression layer and the tension rubber layer; and an outside cloth that covers a periphery of the belt main body, in which the compression layer has a plurality of notch portions not covered with the outside cloth, and the notch portion has a top disposed in the fabric-laminated body layer.

A composite comprises: a reinforcing element (10), an adhesive layer (14) made from an adhesive composition, and an elastomeric body made from an elastomeric matrix comprising an ethylene/alpha-olefin type elastomer and/or a polychloroprene elastomer. The adhesive composition comprises a resin based: on a polyphenol comprising an aromatic ring bearing two hydroxyl functions in the meta position relative to one another, the two positions ortho to one of the hydroxyl functions being unsubstituted; and/or on a monophenol comprising a six-membered aromatic ring bearing a single hydroxyl function, the two ortho positions being unsubstituted, or an ortho position and the para position being unsubstituted, and on a compound comprising an aromatic ring bearing two functions, one of these functions being a hydroxymethyl function and the other being an aldehyde function or a hydroxymethyl function.

The invention relates to a drive belt for a traction mechanism drive, having a radially externally arranged top layer (4) composed of a fiber-containing elastomer or of an elastomer comprising a fiber mesh, having a radially centrally arranged tension member layer (6) composed of a wound tension strand or a plurality of circumferentially oriented tension strands, and a radially internally arranged substructure (8) composed of an elastomer, wherein at least one wedge-shaped rib is integrally formed in the substructure (8), a coating layer (10) composed of a circumferentially open fiber mesh being applied to the outer surfaces of said wedge-shaped rib. In order to prevent an abrupt change in the friction coefficient at the force-transmitting flanks of the ribs, provision is made for the circumferential ends (12, 14) of the coating layer (10) and a parting joint (16), which is filled by the elastomer of the substructure (8), between said circumferential ends (12, 14) of the coating layer (10) to be covered with a transverse strip (18) composed of a vulcanizable material, wherein said vulcanizable material has a reduced friction coefficient in relation to the elastomer of the substructure (8).

A link belt is provided wherein the link belt is formed of a plurality of links forming a series of links in successive overlapping relation. The link belt includes a first end having a first connector and a second end having a second connector so that the first connector is connected with the second connector to form a continuous loop of link belt. The link belt is formed by applying a lateral force against the assembled link belt while the link belt is under an axial tension to stretch the belt. After the step of stretching the belt, the first connector is connected with the second connector to form a continuous belt.

A method for producing a sheet-like composite fabric material, in particular a rubberized fabric or a fabric provided with a polymer preparation, for covering drive belts, the composite fabric material comprising a textile integrated in a matrix of elastomeric material, preferably at least one fabric layer integrated in a rubber matrix, the textile or the fabric layer and the elastomeric material being introduced into a gap between a band and a cylindrical molding wheel and molded to form a composite material between the band and the molding wheel at a temperature below the vulcanization temperature, the band looping around the molding wheel at a looping angle under pressure. Likewise disclosed is a drive belt with a covering of composite material produced according to the invention.

Modified diene polymers containing heteroatoms are disclosed, as is their production, rubber mixtures comprising these modified diene rubbers, and to their use for the production of rubber vulcanizates, which serve, in particular, for the production of rubber moldings and the production of tires.

A frictional power transmission belt includes a tension layer forming a belt back surface, a compression rubber layer to be in contact with a pulley and frictionally engaged with the pulley, and a tension member embedded between the tension layer and the compression rubber layer along a belt length direction. The compression rubber layer has a surface to be in contact with the pulley. At least a part of the surface is coated with a fiber layer via a fiber/resin mixture layer. The fiber/resin mixture layer contains a resin component and heat-resistant fibers having a softening point or a melting point higher than a vulcanization temperature of a rubber forming the compression rubber layer. The fiber layer contains hydrophilic heat-resistant fibers having a softening point or a melting point higher than the vulcanization temperature and does not contain a resin component.

The present invention relates to a twisted cord for constituting a core wire of a power-transmission belt, the twisted cord including a plurality of primary twisted yarns that are bundled and secondarily-twisted, in which when secondary twist is untwisted by 25 cm, a difference in length between the longest primary twisted yarn L and the shortest primary twisted yarn S among the plurality of primary twisted yarns is 1 to 10 mm.

A production method for producing a frictional power transmission belt containing an extensible layer forming a belt back surface, a compressive rubber layer formed on one surface of the extensible layer and frictionally engaging at the lateral surface thereof with pulleys, and a tension member embedded between the extensible layer and the compressive rubber layer along the belt length direction. A surface of at least a part of the compressive rubber layer to be in contact with pulleys is coated with a fiber/resin mixture layer that contains a resin component and heat-resistant fibers having a softening point or a melting point higher than a vulcanization temperature in a mixed state, and the heat-resistant fibers contain a fiber embedded so as to extend from the fiber/resin mixture layer to the compressive rubber layer.