MANUFACTURING PROCESS FOR GAS BARRIER FILM

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing process for a gas barrier film which does not contain chlorine in the structure and is excellent in oxygen gas barrier properties at a high humidity. SOLUTION: The manufacturing process for a gas barrier film comprises treating a gas barrier polymer layer (D) formed from a composition (C) containing a polyalcohol polymer (A) and a polymer (B) mainly comprising itaconic acid units with water containing an at least divalent metal compound (E). The oxygen permeability of thus obtained film at 25°C at a relative humidity of 80% is 50 cc/(m2×24h×atm) or lower. COPYRIGHT: (C)2004,JPO