Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
September 5, 2006
Patent Application Number
11009018
Date Filed
December 13, 2004
Patent Primary Examiner
Patent abstract
A heat-shrinkable film and a method of its manufacture are provided. In an exemplary embodiment, a polystyrene film exhibits heat-induced growth in the cross direction of great than or equal to 5% with greater than or equal to 30% concomitant shrinkage in the machine direction. The films may comprise crystal polystyrene, high impact polystyrene, and/or elastomers. A method of manufacture is disclosed which includes a post-extrusion temperature conditioning step.
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