abstract |
PROBLEM TO BE SOLVED: To provide a thermoplastic resin film having good water resistance, high gas barrier properties even under high humidity, and which can be industrially manufactured at low cost. SOLUTION: A coating agent comprising a polyvinyl alcohol and an ethylene-maleic acid copolymer in a weight ratio of 97/3 to 10/90 is coated on at least one surface of a thermoplastic resin film and then subjected to a heat treatment to form a water-insoluble resin. A gas barrier film having a gas barrier layer. |