... screw extruder 3.extruding PVC pipe, sheet, profile , granule ,window plastic sheet machine: The SJSZ series conical twin screw ... convert thermoplastic especially PVC powder into pipe , plate sheet ,film and profile ,also provide function of modifying ... excellent plasticization 2.stable performace 3.extruding PVC,PE,PP pipes, sheets,profile , granule .double screw extruder plastic sheet machine