Patent ID: 9688449
Date: 2017-06-27
CPC Classifications: B32B,B65D,C08J,Y10T

Claim:
1. A gas barrier film, comprising: a base film comprising a plastic material; and at least one gas barrier layer formed on the base film, wherein the gas barrier layer comprises a water-soluble resin, a water-insoluble resin, and an inorganic layered mineral having a plurality of layers such that at least one of the water-soluble resin and the water-insoluble resin is interposed between the layers of the inorganic layered mineral, the water-soluble resin is a polyvinyl alcohol resin, the water-insoluble resin comprises a polyurethane resin having an acid group including at least one of a carboxyl group and a sulfonic group, the inorganic layered mineral has an average particle size of from 1 μm to 10 μm, and the gas barrier film shows an X-ray diffraction spectrum having a first peak top and a second peak top when measured at 25° C. and 65% RH using CuKα rays, the first peak top is derived from a first interlayer distance between adjacent layers of the inorganic layered mineral, the second peak top is derived from a second interlayer distance which is greater than the first interlayer distance by interposition of the resin component between the layers of the inorganic layered mineral, and the second peak top is present at a position lower than a position of the first peak top in a 2θ axis.