METHOD FOR FORMING COATING FILM OF SAPONIFIED ETHYLENE/ VINYL ACETATE COPOLYMER

摘要

PURPOSE:To obtain a coating film having remarkably improved transparency and gas barrier properties, by dissolving a saponified ethylene/vinyl acetate copolymer in a mixture consisting of water, a specified alcohol and formic acid as a solvent and applying the soln. to a substrate to form a coating film of said saponified copolymer. CONSTITUTION:A saponified ethylene/vinyl acetate copolymer having an ethylene content of 25-55mol% and a degree of saponification of vinyl acetate component of 90mol% or below is dissolved in a mixture consistig of 10-60wt% water, 5-70wt% at least one member selected from among propyl alcohol, butyl alcohol and benzyl alcohol and 2-85wt% formic acid as a solvent. A substrate is coated with the resulting soln. and drived to form a coating film of said saponified copolymer. The soln. contains said saponified copolymer at a concn. of pref. 0.5-15wt%.