Patent ID: 7419726

Claim:
A gas barrier laminated film wherein a gas barrier layer (B) has been formed on at least one surface of a film substrate (A), the gas barrier layer (B) being comprised of a composition (b3) of 95˜10 weight % of an ethylene-vinyl alcohol copolymer (b1) having an ethylene content of 1˜19 mol %, having a polymerization degree of 100 to 2500 and a saponification degree of 85% to 99.9%; and 5˜90 weight % of poly(meth)acrylic acid polymer (b2) having a polymerization degree of 30 to 3000; wherein an inorganic oxide vapor deposition layer (a1) having been formed on the surface of the film substrate (A), and the gas barrier layer (B) is formed on the film substrate (A) through the vapor deposition layer (a1); wherein the film substrate (A) is a biaxially stretched film; wherein the poly(meth)acrylic acid polymer (b2) has a degree of neutralization of 3-15%.