... Designed for plastic WPC SKDsereries screw barrel for plastic wpc made in china Conical Twin Screw Barrel and Plastic Extruder Machine Spare PartsOur conical twin screw and barrel ... : Nitriding treatment, alloy coating spraying, heat-treatment Appliance: PVC, PP, PE, PA, PC, ABS, AS etc ... 300 high Calcium Profile,soft PVC sheet, PVCfoaming boardetc.PP,PE,ABS,PVC,raw material pelletzing,plastic pipe ...