GAS-BARRIER FILM AND PRODUCTION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain a gas-barrier film free from chlorine in its structure which is excellent in barrier property to oxygen gas at high humidities, water resistance and hot water resistance and its laminated material without high temperature or long-time heat treatment which is conventionally required. SOLUTION: The gas-barrier film is composed of a mixture of polymer (B) obtained by polymerizing monomers (A) containing a carboxylic acid having polymerizable unsaturated double bonds, polyacrylamide (C) and a monovalent metal salt (D). It has an oxygen permeability of 100 cc.μm/m<2> .24 h.atm or lower at 25 deg.C at a relative humidity of 80%.