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Use of Chilled Die Lips to Improve Production Rates in Extrusion of PE
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D. G. Cook
Published/Copyright:
May 27, 2013
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.
Published Online: 2013-05-27
Published in Print: 1989-05-01
© 1989, Carl Hanser Verlag, Munich
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Articles in the same Issue
- Contents
- Contents
- Review Paper
- New Developments in Fiber- and Filmextrusion
- Original Contributions
- Use of Chilled Die Lips to Improve Production Rates in Extrusion of PE
- Characterization of the Sharkskin Defect and its Development with the Flow Conditions**
- Modifying Threadline Dynamics in the High-speed Melt Spinning Process
- Computer Simulation of Multi filament Air Jet Melt Spinning
- Structure Development in the Melt Spinning and Drawing of Poly p Phenylene Sulfide Fibers
- Cast Film Extrusion of Polypropylene Films
- Air Ring Effect on Blown Film Dynamics
- Computer Simulation of Melt Viscoelasticity Functions for Binary Polyblends
Articles in the same Issue
- Contents
- Contents
- Review Paper
- New Developments in Fiber- and Filmextrusion
- Original Contributions
- Use of Chilled Die Lips to Improve Production Rates in Extrusion of PE
- Characterization of the Sharkskin Defect and its Development with the Flow Conditions**
- Modifying Threadline Dynamics in the High-speed Melt Spinning Process
- Computer Simulation of Multi filament Air Jet Melt Spinning
- Structure Development in the Melt Spinning and Drawing of Poly p Phenylene Sulfide Fibers
- Cast Film Extrusion of Polypropylene Films
- Air Ring Effect on Blown Film Dynamics
- Computer Simulation of Melt Viscoelasticity Functions for Binary Polyblends
