... 4.long working life, wear resistance PET bottle blown machinery screwbarrel/screwbarrel for blowing bottle/single screw and barrel for PET bottlemachine ... of Nitration:≤Two classMaterial Application1)General Plastics2)ABS,PA,PC,PE,PET,PP,PS,EVA,PU,PVC,U-PVC,etc3) ... screw barrel12.Blocks screw13.Gear box14.screw barrel for blowing molding machine 1, Conical twin screw extruder is special equipment for ...