... .high speed steel W6Mo5Cr4V2 4. quenching treatment screw element for co-rotating twin screw extruder machineMaterial: W6Mo5Cr4V2 ... heat-melting glue,polyurethane,fluorin rubber,fluorin plastics,PPcigarette filtering material and TPR sole materialReaction extrudingPolyamide condensate,polyamide ... paintPolyester,ring oxide,lactide,polyurethane,acrylate screw element for co-rotating twin screw extruder