Patent ID: 9745435
Date: 2017-08-29
CPC Classifications: B29C,B29K,B32B,C08J,C08K,Y10T

Claim:
1. A composite for use in a multi-layer flexible film, said composite comprising a cavitated bio-based layer comprising polylactic acid, an inorganic filler, and a bio-based cavitation stabilizer, wherein said cavitated bio-based layer comprises between 12% and 25% by weight of said inorganic filler, wherein said bio-based cavitation stabilizer comprises between about 5% and about 20% by weight of said cavitated bio-based layer, further wherein said cavitated bio-based layer has been oriented between 2× and 3× in a machine direction and between 4× and 7× in a transverse direction to produce said cavitated bio-based layer, wherein said cavitated bio-based layer comprises a density between about 16% and about 29% lower than a film substantially free of inorganic filler and bio-based cavitation stabilizer.