... Designed for plastic WPC SKDsereries screw barrel for plastic wpc made in china Conical Twin Screw Barrel and Plastic Extruder Machine Spare ... treatment, alloy coating spraying, heat-treatment Appliance: PVC, PP, PE, PA, PC, ABS, AS etc Depth of Nitrated Layer: 0 ... metal layers Vacuum quenching scope of application : PVCwood-plastic., PE wood-plastic,,Super high polymer board,1/2 high Calcium ...