LAMINATING POLYESTER FILM

摘要

PROBLEM TO BE SOLVED: To provide a low temperature thermal laminating braxially oriented polyester film excellent in barrier properties and taste/aroma retaining properties and capable of being thermally laminated to an adherend at 160-200°C. SOLUTION: The low temperature thermal laminating biaxially oriented polyester film is a biaxially oriented laminated polyester film composed of at least two layers and the layer A constituting one side thereof is constituted of a polyester resin with a melting point of 245-280°C based on ethylene terephthalate while the layer B constituting the other surface thereof is constituted of a copolyester with a melting point of 200-240°C. The coefficientsΔPA andΔPB of surface orientation of the respective layers satisfy the following formula (1):0.140≤ΔPA≤0.180 and the formula (2):0.020≤ΔPB≤0.080, and the thicknesses TA and TB of the respective layers satisfy the formula (3):0.08≤TB/TA≤0.50. COPYRIGHT: (C)2005,JPO&NCIPI