Power transmission belt

摘要

A compression rubber layer 5 of a V-belt 1 is made of an alkylated chlorosulfonated polyethylene composition in which a value of tan delta is 0.08 to 0.15 under conditions of a temperature of 100 DEG C and a frequency of 10 Hz. Thus, production of a crack during the running of the belt 1 is restricted. The alkylated chlorosulfonated polyethylene composition is composed of 0.6 to 1.2 weight % sulfur-contained alkylated chlorosulfonated polyethylene of 100 weight parts, N,N'-m-phenylene dimaleimide of 0.2 to 5.0 weight parts, dipentamethylene thiuram tetrasulfide of 0.1 to 4.0 weight parts and pentaerythrite of 0.1 to 5.0 weight parts.