A gas-barrier laminate with a plastic substrate, an inorganic thin film formed on at least one surface of the plastic substrate, and a
coating layer formed by applying a
coating material on a surface of the inorganic thin film, wherein said
coating layer contains a
polyester-based resin having a molecular weight of 3000 to 15000 and a
polyurethane-based resin having a molecular weight of 8000 to 30000 at a weight ratio of 5 / 95 to 95 / 5, and said gas-barrier laminate has an
oxygen permeability of not more than 25 fmol / m2 / s / Pa; and a gas-barrier laminate comprising a plastic substrate, an inorganic thin film formed on at least one surface of the plastic substrate, and a coating layer formed by applying a coating material on a surface of the inorganic thin film, wherein the gas-barrier laminate exhibits an
oxygen permeability of not more than 50 fmol / m2 / s / Pa as measured with respect to a gas-barrier film obtained by laminating an unstretched
polypropylene film having a thickness of 60 μm on the coating layer of the gas-barrier laminate after subjecting the gas-barrier film to
hydrothermal treatment at 120° C. for 30 min, and the coating layer has either a
hardness of 0.1 to 0.5 GPa as measured at 23° C. in
atmospheric air by a nano-
indentation hardness testing method, a
hardness of 0.03 to 0.5 GPa as measured at 23° C. in water by a nano-
indentation hardness testing method, or a ratio of number of carbon atoms derived from carboxyl groups to number of carbon atoms constituting the surface of the coating layer of 0.005 to 0.1.