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EXTRUSION PROCESSING GUIDE - Lubrizol

EXTRUSIONPROCESSING GUIDEADVANCING GUIDE CONTENTSI ntroduction .. Guidelines ..2 Equipment ..3 Common EXTRUSION Issues ..4 Polyurethane Films ..4 Cast Film and Sheet EXTRUSION ..4 EXTRUSION Coating ..5 Blown Film ..6 Wire and Cable Coating, Hose Jacketing ..7 Tubing and Profile EXTRUSION ..8 Trouble Shooting GUIDE ..923To learn more, visit is continuously expanding for specialty materials that have a combination of outstanding mechanical properties together with the capability of being converted on conventional thermoplastic PROCESSING equipment.

The optimal extruder barrel length for Lubrizol TPUs is 30-32 times its internal diameter (30:1 L/D, 32:1 L/D). Although shorter barrels can be used, mixing efficiency and melt uniformity are not optimal. Cooling to the extruder feed throat is critical to prevent surging or bridging. Internal cooling to the screw is not needed. Screw Design

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