| 摘要 |
PROBLEM TO BE SOLVED: To provide a biodegradable polymer composition suited to obtain a biodegradable packaging film excellent in low-temperature heat sealability, transparency, and piercing resistance, to provide a film comprising the composition, and to provide a laminated film comprising the film. SOLUTION: The biodegradable polyester composition comprises 95 to 10 wt.% aliphatic polyester copolymer (A) made from an aliphatic or alicyclic dicarboxylic acid component (a1), an aliphatic or alicyclic dihydroxy compound component (a2), and a bifunctional aliphatic dihydroxycarboxylic acid component (a3) and having a melting point (Tm) of 80 to 120°C, a crystallization temperature (Tc) of 35 to 75°C, and (Tm)-(Tc) in the range of 35 to 55°C and 5 to 90 wt.% biodegradable polymer (B) having a melting point (Tm) of 45 to below 80°C. The film comprises the composition. The laminated film comprises the film. COPYRIGHT: (C)2006,JPO&NCIPI
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