| abstract |
[PROBLEMS] To be useful as a packaging material in various fields such as foods, pharmaceuticals, and precision electronic parts, excellent in flexibility, transparency, moisture resistance, solvent resistance, etc., and without an overcoat layer. Provided is a gas barrier film having a gas barrier property, particularly an excellent oxygen barrier property, under a high humidity for a long time. A silicon oxide formed from a mixture of a hydrolyzate of alkoxysilane and polyvinyl alcohol (alkoxysilane and / or a polycondensate of alkoxysilane) on at least one surface of a substrate made of a plastic film. And a weight ratio of polyvinyl alcohol of 50/50 to 80/20), and a gas barrier film having no overcoat layer on the coat layer, and under a condition of 20 ° C.-90% RH A gas barrier film having an oxygen permeability of 10 cc / m 2 · 24 Hr · atm or less measured under the same conditions after humidity conditioning for 48 hours, [Selection figure] None |