Patent ID: 7166353

Claim:
A gas-barrier film comprising: a base film, an anchor coat layer which is a cured film comprising a mixture containing an oxazoline group-containing resin and at least one resin selected from the group consisting of acrylic-based resins, urethane-based resins and polyester-based resins and, a thin film formed on the anchor coat layer which has a thickness of 3 to 20 nm and comprises a metal compound selected from the group consisting of oxides, carbides and nitrides of metals, and mixtures thereof, which gas-barrier film has an oxygen permeability of not more than 3 cc/m 2 /day/atm and has such a property that when a laminate comprising the gas-barrier film and an unstretched polypropylene film having a thickness of 50 μm which is laminated on the metal compound thin film of the gas-barrier film is subjected to a hydrothermal treatment at 120° C. for 30 mm, a change in oxygen permeability of the laminate between before and after the hydrothermal treatment (after/before) is not more than 5.