| abstract |
A gas barrier coating method having good wet adhesion strength is provided. Polyvinyl alcohol and / or ethylene vinyl alcohol copolymer and / or silylated derivatives thereof and colloidal silica (preferably a suspension thereof) comprising an aqueous solution or dispersion. A method for improving wet adhesive strength by using colloidal silica having a specific surface area of 300 m 2 / g or more, preferably more than 450 m 2 / g and a particle diameter of less than 10 nm. [Selection figure] None |