BELT HAVING A TEXTILE OVERLAY

摘要

The invention relates to a power transmission belt, having a base of cast polyurethane (30) and a power transmission zone (3) formed thereon and comprising, at least in contact with the power transmission zone (3), an abrasion-proof textile overlay (1) having an inner impregnation that acts to reduce abrasion by fixing the textile fibres and constitutes a barrier coat for the polyurethane in order to prevent same from passing through the textile with the associated increase in abrasion. For the impregnation, a thermoplastic material (22) having a melting point not below 80° C. is located in the interior of the textile overlay (1) in addition to the textile material and substantially completely fills the interstices between the textile threads (16) or fibres in a central plane (15) of the textile viewed across the area, wherein the polyurethane (30) does not completely penetrate the base of the textile overlay (1), limited by the thermoplastic material (22). For the impregnation, it copolyamide film (2) can be fused into the textile in a pre-treatment step.

主权项

1. A power transmission belt having a substructure of polyurethane and a power transmission zone constructed thereon and also a textile overlay in contact with the polyurethane of the power transmission zone, wherein the interior of the textile overlay includes additionally to the textile material a thermoplastic material with a melting point between 80° C. and 145° C. to substantially completely fill the interstices between the textile threads or fibers in a central plane of the textile when viewed across the area, wherein the textile overlay, bounded by the thermoplastic material, is not completely penetrated with the polyurethane of the power transmission zone.