| abstract |
(57) [Summary] [Object] To provide a gas barrier film which is transparent in packaging film and is excellent in bending resistance and gas barrier property. A transparent thin film having a composition of magnesium oxide, silicon oxide and aluminum oxide is provided as a composition of the transparent gas barrier layer, and the thin film composition contains 40% by weight or more of magnesium oxide and contains silicon oxide. Is contained in an amount of 50% by weight or less, and thus has excellent transparency and gas barrier properties, and also has bending resistance (gelbo property). Will be excellent. |