... lifting 4. high-speed This PE film blowing machine, its extruder, cylinder and screw rods are made of quality alloy steel that ... in corrosion resistance, The specially-designed screw is of sound quality in plasticizing, which helps increase the production capacity. It ... plastic films like low density polytene (LDPE), high density polytene(HDPE) and linear low density polytene (LLDPE). It is widely ...