Abstract: An object to be achieved by the present invention is to provide a gas barrier film having excellent acid resistance, transparency, and gas barrier properties. The gas barrier laminated body of the present invention is a laminate, in which an inorganic thin-film layer is laminated onto at least one of surfaces of a polymer substrate, and the inorganic thin-film layer mainly contains Al and Si, and a ratio of an Al content amount between before and after treatment of immersing the laminate into aqueous solution of hydrochloric acid that has concentration of 1 mol/L for one hour satisfies a formula of (Al Content Amount After Treatment)/(Al Content Amount Before Treatment)×100?75.

Abstract: The invention provides a laminated film that includes a substrate layer (A) mainly composed of a polypropylene-based resin, a surface layer (B) on at least one surface of the substrate layer (A), and a coating layer laminated on the surface layer (B), wherein the laminated film satisfies the following requirements (I) to (III): (I) (a)/(b)?7.00 is satisfied, where (a) is Martens hardness of a coating layer-side surface measured with a test force of 0.1 mN, and (b) is Martens hardness of the coating layer-side surface measured with a test force of 7 mN; (II) a total of a maximum peak height (Rp) and maximum valley depth (Rv) of the coating layer-side surface measured with a scanning probe microscope is 30.0 nm or less; and (III) an oxygen permeation rate measured under conditions of 23° C.×65% RH is 100 cc/m2/day/atm or more and 1200 cc/m2/day/atm or less.

Abstract: The invention provides a laminated film comprising a surface layer (B) at a surface on one side of a substrate layer (A) comprising a polypropylenic resin as primary constituent, and a surface layer (C) at a surface on the other side of the substrate layer (A), and in which an inorganic thin film layer (D) is further laminated over the surface layer (B), the laminated film being characterized in that haze of the laminated film is not greater than 5%, and in that a surface on the inorganic thin film layer (D) side of the laminated film satisfies (I) through (IV), below; (I) arithmetic mean roughness (Ra) by a scanning probe microscope is 4.5-9.0 nm; (II) Martens hardness is not greater than 310 N/mm2; (III) water contact angle is not greater than 75°; and (IV) center plane average roughness (SRa) by a three-dimensional profilometer is 0.010-0.040 ?m.

Abstract: To provide a production method that enables to produce a gas barrier film having excellent transparency and gas barrier properties at high speed. A method for producing a gas barrier film, the gas barrier film having an inorganic thin-film layer laminated to at least one of surfaces of a polymer substrate, in which the inorganic thin-film layer is formed by a vacuum vapor-deposition method using Al and SiO2 as vapor-deposition materials while introducing oxygen gas.

Abstract: An object to be achieved by the present invention is to provide a gas barrier film having excellent acid resistance, transparency, and gas barrier properties. The gas barrier laminated body of the present invention is a laminate, in which an inorganic thin-film layer is laminated onto at least one of surfaces of a polymer substrate, and the inorganic thin-film layer mainly contains Al and Si, and a ratio of an Al content amount between before and after treatment of immersing the laminate into aqueous solution of hydrochloric acid that has concentration of 1 mol/L for one hour satisfies a formula of (Al Content Amount After Treatment)/(Al Content Amount Before Treatment)×100?75.