Polylactic acid shrink films and methods of manufacturing same

Details Polylactic acid shrink films and methods of manufacturing same Polylactic acid shrink films and methods of manufacturing same

2006-04-19

2010-12-07

Dye, Rena L (Department: 1782)

Stock material or miscellaneous articles

Hollow or container type article

Shrinkable or shrunk

C428S034900, C428S220000, C264S563000, C264S454000, C264S535000, C264S001340

Reexamination Certificate

active

07846517

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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