Patent ID: 7056250

Claim:
An endless power transmission belt having (1) a tension section; (2) a cushion section; and (3) a load-carrying section disposed between said tension section and cushion section, and the belt containing an elastomeric composition comprising (a) a cross-linked rubber selected from the group consisting of ethylene alpha-olefin elastomer, hydrogenated acrylonitrile rubber, natural rubber, polybutadiene, polychloroprene and styrene-butadiene rubber; and (b) from 1 to 50 phr of high molecular weight polyacrylonitrile staple fiber having a modulus of 5.5 GPa to 16.5 GPa, a number average molecular weight of 150,000 to 500,000, a specific gravity of 1.1 to 1.2, a diameter in a range of from about 5 to about 15 microns, and a length of from about 0.5 to about 15 mm.