PROCESS FOR PRODUCING ORIENTED POLYOLEFIN FILMS WITH ENHANCED PHYSICAL PROPERTIES
PROCESS FOR PRODUCING ORIENTED POLYOLEFIN FILMS HAVING ENHANCED PHYSICAL PROPERTIES ABSTRACT An improved method for the production of polyolefin film by extruding molten film from an annular die in a tubular form into an extrusion zone is disclosed wherein the physical properties of the film are enh...
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Main Author | |
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Format | Patent |
Language | English French |
Published |
27.11.1990
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Edition | 5 |
Subjects | |
Online Access | Get full text |
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Summary: | PROCESS FOR PRODUCING ORIENTED POLYOLEFIN FILMS HAVING ENHANCED PHYSICAL PROPERTIES ABSTRACT An improved method for the production of polyolefin film by extruding molten film from an annular die in a tubular form into an extrusion zone is disclosed wherein the physical properties of the film are enhanced by controlling polymeric crystalline growth. The method comprises providing a liquid quench medium maintained at a constant temperature range in the extrusion zone immediately adjacent the annular die, extruding the molten film directly into the liquid quench medium, and then orienting the quenched film in a tubular bubble whereby the size and amount of crystalline growth is controlled. |
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Bibliography: | Application Number: CA19860502522 |