| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a biaxially oriented film which is excellent in low-temperature heat-sealing properties without deteriorating transparency, an original characteristic of a biaxially oriented polylactic acid film, and has biodegradability. <P>SOLUTION: The biaxially oriented laminated film has a coat layer comprising 97-5 wt.% of an aliphatic polyester copolymer in which the molecular chain is composed of repeating units expressed by formula (1): -CO-R<SP>1</SP>-CO- (R<SP>1</SP>is a 1-12C divalent aliphatic group), formula (2): -O-R<SP>2</SP>-O- (R<SP>2</SP>is a 2-12C divalent aliphatic group), and formula (3): -CO-R<SP>3</SP>-O- (R<SP>3</SP>is a 1-10C divalent aliphatic group), and the repeating unit expressed by formula (3) is 2-30 mol% and 3-95 wt.% of a polylactic acid copolymer having a D-lactic acid content of 7-30 wt.% on at least one side of a biaxially oriented film substrate layer of polylactic acid (B). <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
