| abstract |
[Problem] To provide a gas-barrier laminate film having an inorganic thin film layer that is excellent in gas-barrier properties under normal conditions and after wet heat treatment, and can exhibit good adhesion that does not cause interlayer peeling A laminated film that is easy to manufacture and has excellent economical properties. [Solution] The laminated film is characterized by having a coating layer on at least one side of the polyester base film, and the coating layer is formed of a resin composition for coating layers containing a resin having an oxazoline group as a constituent, and the coating layer is The cover layer has an inorganic thin film layer, and the inorganic thin film layer is provided with a protective layer with a polyurethane resin and an adhesion amount of 0.15 to 0.60 g/m 2 on the inorganic thin film layer, and in the total reflection infrared absorption spectrum of the aforementioned laminated film, at 1530 The ratio (P1/P2) of the peak intensity (P1) having the maximum absorption in the region of ±10 cm- 1 to the peak intensity (P2) having the maximum absorption in the region of 1410±10 cm -1 (P1/P2) is in the range of 1.5 to 3.5, and the aforementioned The oxygen permeability of the laminated film under the conditions of 23° C.×65% RH was 5 ml/m 2 ·d·MPa or less. |