Retort method, resin composition, gas barrier film and method for producing it

摘要

The present invention provides a container for retort packaging comprising a laminated film having an outermost layer comprising a layer formed of a cross-linked structure containing ester bonds between poly(meth)acrylic acid (A) and a polyalcoholic polymer (B); a resin composition having at least the chemical structures (X), (Y) and (Z) described below, wherein the degree of esterification defined by the equation of (degree of esterification) = c/(b+c+d) is 0.01 or more and 0.5 or less and the degree of ionization defined by the equation of (degree of ionization) = c/(b+c+d) is 0.01 or more and 0.9 or less (wherein b, c and d represent the molar ratios of the carbon - oxygen double bond in the chemical structure of the resin composition; and a gas barrier film comprising the same: <CHEM> (R0: H or CH3) <CHEM> (R0: H or CH3, R<1>: a structure derived from polyalcoholic polymer) <CHEM> (R0 is H or CH3 that may be the same or different, Me<n+> is a n-valent metal ion wherein n is 1 to 3)