| abstract |
[PROBLEMS] To provide a gas barrier laminated film having an inorganic thin film layer, which is excellent in gas barrier property and does not cause delamination even after being subjected to wet heat treatment as a matter of course. In addition, the present invention provides a laminated film that is easy to manufacture and excellent in economic efficiency. A laminated film has a coating layer on at least one surface of a polyester base film, and the coating layer is made of a resin composition for a coating layer containing a resin having an oxazoline group as a constituent component. In the total reflection infrared absorption spectrum of the laminated film, having an inorganic thin film layer, a protective layer having an adhesion amount of 0.15 to 0.60 g / m 2 having a urethane resin on the inorganic thin film layer, and A ratio (P1 / P2) of a peak intensity (P1) having an absorption maximum in a region of 1530 ± 10 cm −1 and a peak intensity (P2) having an absorption maximum in a region of 1410 ± 10 cm −1 is 1.5 to 3.5. And the oxygen permeability of the laminated film under the condition of 23 ° C. × 65% RH is 5 ml / m 2 · d · MPa or less. [Selection figure] None |