US Patent 7846517 Polylactic acid shrink films and methods of manufacturing same

Patent 7846517 was granted and assigned to Plastic Suppliers, Inc. on December, 2010 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

Plastic Suppliers, Inc.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

78465170

Patent Inventor Names

Joseph B. McDaniel0

Date of Patent

December 7, 2010

Patent Application Number

114065300

Date Filed

April 19, 2006

Patent Primary Examiner

‌

Rena L. Dye

Patent abstract

A heat-shrinkable polylactic acid (PLA) film and a method of its manufacture are provided. In an exemplary embodiment, the PLA films exhibit heat-induced growth in the cross direction with concomitant shrinkage in the machine direction. The films may comprise any grade of PLA polymer, optionally including additives, such as antiblock, slip, viscosity enhancers and combinations thereof. A method of manufacture is disclosed which includes a post-extrusion temperature conditioning step.

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