Method of treating polyester fibers, polyester fibers treated by said method, and composite composed of said polyester fibers and nitrile group-containing highly saturated copolymer rubber.

摘要

A method of treating polyester fibers, which comprises (1) treating the polyester fibers with an adhesive composition (AR) comprising a latex (A) of a vinylpyridine/conjugated diene copolymer having a vinylpyridine unit content of at least 20 % by weight but not more than 70 % by weight and a resorcinol-formaldehyde resin as main components, and (2) further treating it with an adhesive composition (BR) comprising a latex (B) of a nitrile group-containing highly saturated copolymer rubber having an iodine number of not more than 120 and a resorcinolformaldehyde resin as main components. A composite obtained by bonding the treated polyester fibers to a nitrile group-containing highly saturated copolymer rubber by vulcanization has high initial and heat-resistant adhesion strength, and is useful for production of timing belts and polyribbed belts.