V-belt from an elastomeric material, composed of an in each case annular V-belt substructure and V-belt back that are connected to one another and are produced as a V-belt composite from two individually tailored and conjointly vulcanized part-blanks, specifically a first part-blank that is configured as a V-belt substructure and includes the belt profile, and a second part-blank that is configured as a wound V-belt back, wherein the V-belt has one or a plurality of tiers of reinforcing support cords and on the belt back and/or on the profile side of said V-belt has a woven fabric, wherein the reinforcing support cords are radially disposed so as to be in a circumferential plane in the V-belt back and so as to be outside the V-belt substructure.

A friction transmission belt has a power transmission face made of a rubber composition. The rubber composition contains: a rubber component containing, as a main component, an EPDM with a diene content of 6.0% by mass or more; and short fibers dispersed in the rubber component so as to be oriented in a belt width direction, and having an aspect ratio of 100 or more. The rubber composition has a tensile yield stress of 15.0 MPa or more at 25° C. in the belt width direction.

A friction transmission belt has a power transmission face made of a rubber composition. The rubber composition contains: a rubber component containing, as a main component, an EPDM with a diene content of 6.0% by mass or more; and short fibers dispersed in the rubber component so as to be oriented in a belt width direction, and having an aspect ratio of 100 or more. The rubber composition has a tensile yield stress of 15.0 MPa or more at 25° C. in the belt width direction.

The present invention relates to a wrapped joined V-belt in which outer peripheral surfaces of a plurality of wrapped V-belt portions are coupled via a tie band, each of the wrapped V-belt portions includes a tension member layer, a tension rubber layer laminated at a belt outer peripheral side, a compression rubber layer laminated at a belt inner peripheral side, and an outside cloth covering an entire outer surface of the belt, and the compression rubber layer includes a first compression rubber layer laminated at the belt outer peripheral side and a second compression rubber layer laminated at the belt inner peripheral side, a rubber hardness of the tension rubber layer is higher than that of the second compression rubber layer, and a rubber hardness of the first compression rubber layer is equal to or higher than that of the tension rubber layer.

The present invention relates to a wrapped joined V-belt in which outer peripheral surfaces of a plurality of wrapped V-belt portions are coupled via a tie band, each of the wrapped V-belt portions includes a tension member layer, a tension rubber layer laminated at a belt outer peripheral side, a compression rubber layer laminated at a belt inner peripheral side, and an outside cloth covering an entire outer surface of the belt, and the compression rubber layer includes a first compression rubber layer laminated at the belt outer peripheral side and a second compression rubber layer laminated at the belt inner peripheral side, a rubber hardness of the tension rubber layer is higher than that of the second compression rubber layer, and a rubber hardness of the first compression rubber layer is equal to or higher than that of the tension rubber layer.

A band or belt designed as an elongate bearing, traction or drive element running around rollers or pulleys and made of an elastomer material, and preferably provided with embedded reinforcing elements or tension members extending in the longitudinal direction of the band or belt, having the following features: the band or the belt has one or more elongate tubular receptacles embedded in the elastomer material, in the cavity of which electronic components are arranged, preferably sensors, signal processing or control devices and/or transmission devices, the tubular receptacles are embedded in the elastomer material in such a way that their longitudinal axis or the direction of their greatest extent is oriented substantially transversely to the main bending direction of the band or belt.

A band or belt designed as an elongate bearing, traction or drive element running around rollers or pulleys and made of an elastomer material, and preferably provided with embedded reinforcing elements or tension members extending in the longitudinal direction of the band or belt, having the following features: the band or the belt has one or more elongate tubular receptacles embedded in the elastomer material, in the cavity of which electronic components are arranged, preferably sensors, signal processing or control devices and/or transmission devices, the tubular receptacles are embedded in the elastomer material in such a way that their longitudinal axis or the direction of their greatest extent is oriented substantially transversely to the main bending direction of the band or belt.

In some embodiments, the present disclosure provides a composition comprising from 5 phr to 30 phr of a PEDM terpolymer having 1 to 10 wt % diene, 13 to 40 wt % ethylene, and 15 to 85 wt % propylene, based on the weight of the PEDM terpolymer. The composition further comprises from 70 phr to 95 phr of an ethylene-based copolymer comprising an ethylene content different than the first polymer, a C.sub.3 to C.sub.12 α-olefin, and, optionally, one or more dienes.

Provided is a power transmission V-belt containing: a rubber layer; a cord buried in the rubber layer along the belt circumferential direction; and at least one reinforcing layer buried in the rubber layer, in which the reinforcing layer contains reinforcing fiber filaments having the same length as a belt width; and contains no fibers intersecting with the belt width direction, or contains the fibers intersecting with the belt width direction in a weight per unit area of 30% or less of the reinforcing fiber filaments, in which the reinforcing layer has a structure in which the reinforcing fiber filaments are in a non-twisted state, are oriented in the belt width direction, and are spread and bonded in a sheet shape, and in which the reinforcing layer has a thickness of 0.05 mm to 0.5 mm.

Provided is a power transmission V-belt containing: a rubber layer; a cord buried in the rubber layer along the belt circumferential direction; and at least one reinforcing layer buried in the rubber layer, in which the reinforcing layer contains reinforcing fiber filaments having the same length as a belt width; and contains no fibers intersecting with the belt width direction, or contains the fibers intersecting with the belt width direction in a weight per unit area of 30% or less of the reinforcing fiber filaments, in which the reinforcing layer has a structure in which the reinforcing fiber filaments are in a non-twisted state, are oriented in the belt width direction, and are spread and bonded in a sheet shape, and in which the reinforcing layer has a thickness of 0.05 mm to 0.5 mm.