GAS-BARRIER FILM AND PRODUCTION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a film free from chlorine in its structure which is excellent in barrier property to oxygen gas at high humidities and does not change yellow in color even if heated, and also to provide its laminated materials. SOLUTION: The gas-barrier film is composed of a mixture of a polyalcohol polymer (A), a vinyl polymer whose main component is itaconic acid (B) and an alkaline compound (C). It has oxygen permeability of 100 cc.μm/m<2> .24 h.atm or lower at 25 deg.C at a relative humidity of 80%.