| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas barrier polyester film having excellent processability and gas barrier properties. SOLUTION: A gas barrier layer is provided on an A-surface of a base film made of polyester resin. When surface roughnesses of A and B surfaces of the film are indicated by ARa, BRa, ARa<BRa, ARa<=0.05μm, 0.02μm<=BRa<=0.37μm are satisfied. And, maximum heat shrinkage factor of lengthwise and lateral directions of the film are 50 to 500 g/mm<2> , and heat shrinkage factor of a lengthwise direction at 190 deg.C of the film is a range of -1.5 to 6%. |
