... after Hardening & Tempering: HB240-280Fragility of Nitration:≤Two classMaterial Application1)General Plastics2)ABS,PA,PC,PE,PET ... screw barrel type:1. injection screw barrel, injection Molding screw barrel,screw tips/screw nozzle,2. single screw barrel3. Twin screw barrel4. Twin Conical screw ... , the cooling is rapid.4, The double screw extruder system can produce PVC plastic pipes, profiles, sheets, ...