Extrusion Processing Guide: PE-HD – High-density polyethylene

Processing Guide: PE-HD – High-density polyethylene  Extruder: Single Screw Extruder with vacuum, grooved feeding section  Screw Design: Barrier Screw, 25-30 L/D  Compression Ratio: 3:1  Cylinder Temperatures: 180-205°C 356-401°F  Melt Temperature: 180-205°C 356-401°F  Pre-Drying: No, 3 hours at 105-110°C (221-230°F) for regrind  Calibration:    Miscellaneous: bimodal PE-HD needs motor with 10-15% higher torque and has higher melt pressure/melt temperature Larger screw diameter : continuously two channels (improved conveying in feeding section)

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

 

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