Extrusion Processing Guide: PVC-P – Polyvinylchloride plasticised

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 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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