Abstract: For showing a wear state of a V-ribbed belt, which is constructed with a belt backing (1), a tension strand (2) arranged underneath the belt backing and a carcass (4), in which there are formed, in the longitudinal direction of the V-ribbed belt, V-ribs (7) which run parallel to one another, have in each case an interspace (8) with respect to one another and have inclined rib flanks (12), wherein the interspaces (8), formed for the engagement of pulley ribs (11) of a V-belt pulley (10), between two V-ribs (7) of the V-ribbed belt extend as far as a rib base (9) of the V-ribs (7), according to the invention a removal of material in the rib base (9) is detected as a criterion for the wear state.

Abstract: The use of metal particles inside the belt back (4) of a force transmission belt (1) serves primarily to protect the belt from overheating in transient temperatures of between 100° C. and approximately 400° C. which can occur during operation in motor vehicle engine compartments and in the heat radiation region of exhaust systems. To this end, the force transmission belt (1), which has a main body (3) made of at least one elastomeric material and having a sub-structure and a belt back (4), and a force transmission zone on the sub-structure, has lamella-type or flake-type particles made of metal, particularly aluminium, mixed into the elastomer at least in an outermost layer (5) of the belt back (4).

Abstract: The use of metal particles inside the belt back (4) of a force transmission belt (1) serves primarily to protect the belt from overheating in transient temperatures of between 100° C. and approximately 400° C. which can occur during operation in motor vehicle engine compartments and in the heat radiation region of exhaust systems. To this end, the force transmission belt (1), which has a main body (3) made of at least one elastomeric material and having a sub-structure and a belt back (4), and a force transmission zone on the sub-structure, has lamella-type or flake-type particles made of metal, particularly aluminium, mixed into the elastomer at least in an outermost layer (5) of the belt back (4).

Abstract: A power transmission belt comprising a belt back, a first, fiber-free, section of vulcanized elastomer vulcanized on the belt back, a load-carrying section embedded between the belt back and the first section, and a second section of vulcanized elastomer vulcanized on the first section, wherein fibers are mixed into the second section.