Gas barrier laminate, and gas barrier packaging material and pillow packaging bag formed of the laminate

A gas barrier laminate comprising a base material layer (A), a gas barrier adhesive layer (B), a gas barrier vapor-deposited inorganic layer (C), and a sealant layer (D) in this order, wherein the gas barrier adhesive layer (B) is adjacent to and in contact with the gas barrier vapor-deposited inorganic layer (C) and the gas barrier vapor-deposited inorganic layer (C) is formed directly on and in contact with the sealant layer (D),

• wherein the gas barrier vapor-deposited inorganic layer (C) comprises one or more selected from the group consisting of vapor-deposited aluminum, vapor-deposited alumina, and vapor-deposited silica, said gas barrier vapor-deposited inorganic layer (C) having a thickness of 1 to 100 nm,
• wherein the gas barrier adhesive layer (B) is a gas barrier organic adhesive layer having a solvent content of 0.5 mg/m2 or less, a glass transition temperature of −30 to 80° C., and a thickness of 0.5 to 6.0 μm, wherein the gas barrier organic adhesive layer is formed by curing a two-pack curable adhesive,
• wherein the two-pack curable adhesive is the reaction product of components consisting of
• 100 parts by mass of a polycarboxylic acid-modified polyester polyol (J) having a number average molecular weight of about 520,
• a hydroxyl value of about 216 mg KOH/g, and
• an acid value of about 96 mg KOH/g;
• about 50 parts by mass of hexamethylene diisocyanate;
• and
• about 29 parts by mass of metaxylylene diisocyanate,
• wherein the sealant layer (D) consists of one or more heat-sealable resins, said sealant layer (D) having a thickness of 15 to 100 μm and a sealing strength of 2 to 20 N/15 mm measured by a T-shaped delamination method at 25° C. and tensile speed of 50 mm/min,
• wherein the base material layer (A) comprises one or more selected from the group consisting of uniaxially oriented polyester film, biaxially oriented polyester film, biaxially oriented polypropylene film, uniaxially oriented polyamide film, and biaxially oriented polyamide film, said base material layer (A) having a thickness of 1 to 300 μm, and
• wherein the gas barrier laminate exhibits an oxygen permeability of 0.05 to 2.0 cm3/m2/day/atm at 23° C. and 90% RH, and a water vapor permeability of 0.01 to 2.0 g/m2/day/atm at 40° C. and 90% RH.