PVC mainly composed of polyvinyl chloride, is polyvinyl chloride resin as the main raw material, adding an appropriate amount of anti-aging agent, stabilizer, calcium carbonate, CPE, dyeing agent, epoxy soybean oil, modifier, etc., after mixing, calendering, etc. It can be divided into soft material

In all kinds of plastic industry production process, the screw of extruder are in high pressure high temperature environment, and under a lot of friction force and the shear stress, the surface of the screw is seriously abrasion. The increase space between screw and screw barrel because of the abras