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Licensed Unlicensed Requires Authentication Published by De Gruyter May 27, 2013

Use of Chilled Die Lips to Improve Production Rates in Extrusion of PE

  • D. G. Cook , R. Cooke and A. Rudin

Abstract

Extrusion rates of polyethylene are limited by the onset of surface defects in the extrudates, which are variously termed sharkskin, melt fracture and so on. Several expedients are effective in relieving this problem. We report here that extrudate surface distortion can be eliminated under some conditions by cooling the die, at normal melt extrusion temperatures. This technique appears to be generally effective for LLDPE and HDPE. The process has been patented [10] for polymers with narrow molecular weight distributions.


* Mail address: Prof. Dr. Alfred Rudin, Guelph-Waterloo Centre for Graduate Work in Chemistry and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.

Published Online: 2013-05-27
Published in Print: 1989-05-01

© 1989, Carl Hanser Verlag, Munich

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