Patent ID: 7288315

Claim:
A gas-barrier film comprising a base film, an anchor coat layer and a metal compound thin film in this order, which metal compound thin film 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 properties 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 min, a change in oxygen permeability of the laminate between before and after the hydrothermal treatment (after/before) is not more than 5; and a critical load when being subjected to nano-scratch measurement on a surface of the metal compound thin film is not less than 2.0 μN.