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1. (WO2017200756) ORIENTED POLYLACTIC ACID POLYMER BASED FILM

Pub. No.:    WO/2017/200756    International Application No.:    PCT/US2017/031043
Publication Date: Fri Nov 24 00:59:59 CET 2017 International Filing Date: Fri May 05 01:59:59 CEST 2017
IPC: C08J 5/18
C08L 67/04
B32B 27/22
B32B 27/30
B32B 27/36
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
Abstract:
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.