| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester film not only excellent in flexibility and close adhesion required for a wrap film, stretch film or bag body, but also excellent in water vapor barrier property, and also suppressed with the bleed out of plasticizer and change of film characteristics over time. SOLUTION: This polyester film is provided by consisting of 50-95 mass% polylactic acid resin and 5 to 50 mass% plasticizer based on 100 mass% total of the polylactic acid resin and plasticizer. The plasticizer has (A) a polymer plasticizer having a polylactic acid segment and (B) a plasticizer having ≤30°C melting point, the amount of the (A) polymer plasticizer is larger than that of (B) the liquid plasticizer, and the tensile elastic modulus of the polyester film is 0.1 to 2 GPa. COPYRIGHT: (C)2008,JPO&INPIT |
