HEAT STERILIZATION PACKAGING LAMINATED MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a heat sterilization packaging laminated material of extremely superior heat sterilization adaptability in which a phenomenon such as interlaminar delamination is not recognized when the retort heat sterilization treatment, the boiling heat sterilization treatment or the like is applied to a packaged product filling and packaging a content by using a laminated material with a printed pattern layer formed of an aqueous ink composition. SOLUTION: In a constitution of a heat sterilization package laminated layer A in which at least a printed pattern layer 2 formed of an aqueous ink composition is formed at least on a base film 1 and also a laminate bonding agent layer 3 is formed on the whole face including the printer pattern layer 2 and also a sealant material layer 4 is formed through the laminate bonding agent layer 3, the laminate bonding agent layer 3 is composed of an isocyanate compound containing an isocyanate group and an oxy compound containing a hydroxyl group, and the molar ratio of the isocyanate group and the hydroxyl group -NCO/OH is 5.0-10.0 and its coating amount is 1.5-4 g/m2 (dry state).