Cots and use can be divided paper roller, printing rollers, printing rollers, hulling rolls, metallurgy Cots and mimeographed Cots; by surface morphology can be divided into flat roll and pattern rubber roller; press material can be divided butyl rubber rollers, nitrile rubber roller, polyurethane rubber roller and silicone rubber roll. Generally consists of an outer layer of plastic, hard layer, metal core, roll neck and the vent components. The processing comprises a roller core sandblasting, bonding processing, plastic molding paste, cloth, wire winding, autoclave curing and surface treatment processes. Cots are mainly used in paper making, printing and dyeing, printing, food processing, metallurgy, plastics processing.