FILM-FORMING COMPOSITION AND SHEET

摘要

To provide a composition for forming a film and its resultant film which has a high level of adhesiveness to a substrate and has good gas barrier properties. < Solution > To prepare the composition for forming a film by adding a silane coupling agent to an aqueous dispersion liquid in which a cellulose nanofiber is dispersed in an aqueous medium. Alternatively, to prepare the composition for forming a film by blending an aqueous dispersion liquid (a) which contains a cellulose nanofiber and has a pH 4-9 with a hydrolysis liquid (b) which contains alkoxysilane hydrolysates and has a pH 2-4 by a weight ratio of "cellulose nanofiber" / "alkoxysilane (in terms of SiO 2 )" in the range from 0.1 to 5.