Extrusion Processing Guide: PVC-P – Polyvinylchloride plasticised

Processing Guide: PVC-P – Polyvinylchloride plasticised  Extruder: Single screw with vacuum, grooved feeding section  Screw Design: 1) Two stage screw: 3:1 compression in feed zone (before vent) decompression at the vent 3:1 compression (with at least 3-4 flights at the end of the screw as a metering zone)2) Barrier screw  Compression Ratio: 2,5-3,0:1  Cylinder Temperatures: 140-190°C 284-374°F  Melt Temperature: 170-200°C 338-392°F  Pre-Drying: no  Calibration:    Miscellaneous: material should be “cheesy” at the vent

Note: This is meant as a general guide. Please consult your material and machinery representative.

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