BIAXIALLY ORIENTED CAVITATED POLYLACTIC ACID FILM
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United States of America Patent
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Issued Date -
Jun 7, 2012
app pub date -
Dec 7, 2011
filing date -
Dec 7, 2010
priority date (Note) -
Abandoned
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Abstract
Disclosed are biaxially oriented laminate films including a core layer including a blend of crystalline polylactic acid polymer and crystalline polystyrene. The films are biaxially oriented at low transverse direction orientation temperatures to impart a degree of cavitation around the crystalline polystyrene such that a white opaque cavitated appearance and lower film densities are obtained. The laminate films may further have additional layers such as a heat sealable layer disposed on one side of the core layer including an amorphous polylactic acid resin and/or a polylactic acid resin-containing layer disposed on the side of the core layer opposite the heat sealable layer, a metal layer, or combinations thereof.
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