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US 9,267,011 B2Granted
Composition and method for making a cavitated bio-based film
AssigneeFrito-Lay North America, Inc.
InventorsRobert Nolan Cotton, Kenneth Scott Laverdure, Deepali Palta, Brad Dewayne Rodgers
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Abstract
Composition and method for making a multi-layer bio-based film having one or more cavitated layers. In one aspect, the multilayer flexible film has polylactic acid, an inorganic filler, and a cavitation stabilizer making up at least one film layer. In one aspect, the barrier web has a cavitated bio-based film layer. In another aspect, the print web has a cavitated bio-based film layer.
Claims5
A method for making a cavitated bio-based composite comprising the steps of:
- a) providing a molten sheet comprising inorganic filler, polylactic acid, and a bio-based cavitation stabilizer, wherein said bio-based cavitation stabilizer comprises between 5% and 20% by weight of the sheet and wherein said inorganic filler comprises between 12% and 25% by weight of the sheet;
- b) orienting said sheet between 2× and 3× in a machine direction;
- and
- c) orienting said sheet between 4× and 7× in a transverse direction, wherein said orienting steps produce a film having a density between about 16% and about 29% lower than a film substantially free of inorganic filler and cavitation stabilizer.
1 more element
Dependencies are inferred from the claim text.