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|1. (WO2017200756) ORIENTED POLYLACTIC ACID POLYMER BASED FILM|
|Applicants:||3M INNOVATIVE PROPERTIES COMPANY
|Inventors:||MERRILL, William W.
KALISH, Jeffrey P.
PERCHA, Pamela A.
DEHN, Derek J.
GIVOT, Bradley L.
KADOMA, Ignatius A.
WITTE, Andrew J.
|Title:||ORIENTED POLYLACTIC ACID POLYMER BASED FILM|
In one embodiment, a film is described comprising a mixture of semicrystalline polylactic acid polymer; polyvinyl acetate polymer having a glass transition temperature (Tg) midpoint as measured by differential scanning calorimetry of at least 25°C; and plasticizer; wherein the film is oriented. In another embodiment, a film is described comprising a mixture comprising semicrystalline polylactic acid polymer, polymer having a midpoint Tg as measured by differential scanning calorimetry of at least 25°C, and plasticizer; wherein the mixture exhibits a single midpoint Tg and the single midpoint Tg ranges from 40°C to 65°C; and wherein the film is oriented and the oriented film exhibits a higher midpoint Tg ranging from 40°C to 65°C and a lower midpoint Tg ranging from 5 to 25°C.