Abstract: A synchronous belt of the present invention has a tension member in the form of a cord, a plurality of teeth fixedly provided on one side of the tension member at set intervals in a longitudinal direction of the belt and a back layer bonded to the other side of the tension member. The back layer and the teeth are formed of urethane elastomer. The tension member is formed of inorganic fibers and is impregnated with a water based latex adhesive. A film of an epoxy adhesive is formed on the surface of the tension member.

Abstract: A multi-filament yarn is subjected to soft twist of 4 to 9 twistings in every 10 cm in a single direction thereby forming a warp yarn. Weft yarns are passed, at a density of 1 to 3 yarns in every 5 cm, crosswise over and under a plurality of the warp yarns parallel-arranged in a set width, thereby forming a cord fabric. The cord fabric is subjected to adhesion treatment with an adhesive so that an adhesive content per unit area thereof reaches 2 to 5%, is subjected to heat treatment so that the warp yarns reaches 1 to 4% in heat shrinkage percentage and is then cut at set lengths thereby obtaining short fibers.