| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a biaxially stretched laminated film comprising an aliphatic polyester copolymer and having biodegradability, flexibility, transparency and heat fusibility. <P>SOLUTION: The biaxially stretched laminated film comprises the aliphatic polyester copolymer characterized in that the molecular chain thereof comprises repeating units represented by general formulae (1)-(3), that is, (1)-CO-R<SP>1</SP>-CO, (2)-O-R<SP>2</SP>-O- and (3)-CO-R<SP>3</SP>-O- (wherein R<SP>1</SP>is a 1-12C divalent aliphatic group, R<SP>2</SP>is a 2-12C divalent aliphatic group and R<SP>3</SP>is a 1-10C divalent aliphatic group) and the repeating unit represented by the general formula (3) is 1-25 mol%. A heat fusible layer, which comprises 97-55 wt.% of the aliphatic polyester copolymer and 3-45 wt.% of a biodegradable resin with a melting point of 45-80°C constituted of the repeating unit represented by general formula (3), is provided on at least one side of the base material layer of the biaxially stretched laminated film. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
