... layer co-works; 3) One-step molding by extrusion. Feature:1) Material of Calender Roller: 45# high quality seamless steel pipes; ... 2) Three roller independent driving,frequency-variable adjustment,mirror finished surface;3) Mainly applied to the processing of panels such as ... PP,PE,PS,EVA,ABS and the compound of geotextile;4) Widely used in the industries like packing,household appliance,constructional ...