GAS BARRIER FILM AND METHOD FOR PRODUCING SAME

摘要

An object of the present invention is to provide a gas barrier film which is less likely to undergo loss of gas barrier property when it is bent and which exhibits high transparency and high gas barrier property. A gas barrier film comprising a polymer film substrate and a gas barrier layer containing at least zinc oxide and silicon dioxide on at least one surface of the polymer film substrate, wherein the gas barrier layer satisfies at least one of the following [I] to [III]:
[I] with regard to X-ray absorption near edge structure (XANES) spectrum at K absorption edge of zinc, the value of (spectrum intensity at 9664.0 eV) / (spectrum intensity at 9668.0 eV) is in the range of 0.910 to 1.000;
[II] the value obtained by dividing atomic concentration of zinc with atomic concentration of silicon is in the range of 0.1 to 1.5, and structural density index represented by the following equation: structural density index = density of the gas barrier layer obtained by X - ray reflextometry XRR / theroretical density calculated from composition ratio determined by X - ray photoelectron spectroscopy XPS �¢ is 1.20 to 1.40 ;
[III] when peak in the wave number range of 900 to 1,100 cm -1 measured in FT-IR measurement is subjected to peak separation into the wave number of 920 cm -1 and the wave number of 1,080 cm -1 , the value of ratio (A/B) of integrated intensity of the spectrum having its peak at 920 cm -1 (A) to integrated intensity of the spectrum having its peak at 1, 080 cm -1 (B) is at least 1.0 and up to 7.0.