Patent ID: 8142316

Claim:
A synchronous drive belt having a drive surface that includes trapezoidal or curvilinear teeth, a compression section, a tension section, a load carrying section disposed between the compression section and the tension section, a fabric layer which is adhered to the outer drive surface of the belt, and an insulation layer located between the compression section and the fabric layer, wherein the load carrying section includes load carrying filaments or cords which are embedded in an elastomeric/thermoplastic material, the insulation layer comprising the elastomeric/thermoplastic material, the elastomeric/thermoplastic material comprising 50 to 90 parts per hundred of an elastomer and 10 to 50 parts per hundred thermoplastic, the tension section comprising a member selected from the group consisting of natural rubber, polychloroprene, acrylonitrile-butadiene copolymer, polyisoprene, zinc salts of unsaturated carboxylic acid ester grafted hydrogenated nitrile butadiene elastomers, styrene-butadiene rubber, polybutadiene rubber, ethylene propylene diene monomer rubber, hydrogenated acrylonitrile-butadiene copolymer, polyurethane, and ethylene-acrylic elastomers, and the compression section comprising a member selected from the group consisting of natural rubber, polychloroprene, acrylonitrile-butadiene copolymer, polyisoprene, zinc salts of unsaturated carboxylic acid ester grafted hydrogenated nitrile butadiene elastomers, styrene-butadiene rubber, polybutadiene rubber, ethylene propylene diene monomer rubber, hydrogenated acrylonitrile-butadiene copolymer, polyurethane, and ethylene-acrylic elastomers.