Oriented polymeric films and process for enhanced orientation of

Details Oriented polymeric films and process for enhanced orientation of Oriented polymeric films and process for enhanced orientation of

1990-06-22

1992-04-21

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264514, 264173, 2642106, 264211, B29C 3510

Patent

active

051065452

ABSTRACT:
The present invention provides a process for increasing the orientation rate during manufacturing a heat-shrinkable (oriented) polymeric film including: (a) introducing a pro-rad agent to a cross-linkable polymer by blending the cross-linking agent with the cross-linkable polymer, (b) extruding the blended cross-linkable polymer, (c) subjecting the extruded polymer to irradiation, (d) orienting the extruded polymer in at least one direction, and (e) recovering an oriented polymeric film, wherein (f) both the original amount of pro-rad agent and the dosage of irradiation are to an extent sufficient to provide an amount of cross-linking effective to accomplish an increased orientation rate during the orientation step.

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