... 3.high speed steel W6Mo5Cr4V2 4. quenching treatment screw element for co-rotating twin screw extruder machineMaterial: W6Mo5Cr4V2 high ... ,antimony oxide.PP,PA,ABS+ferrous powder,sulphuric powder,ceramic powderFunctional masterbatch granulesPP,PA,ABS,PBT,ect+burning agent ... polyethylenePowder paintPolyester,ring oxide,lactide,polyurethane,acrylate screw element for co-rotating twin screw extruder