WATERPROOF FILM, BACK SHEET FOR DISPOSABLE DIAPER, EXCRETION DISPOSAL BAG AND METHOD FOR PRODUCING WATERPROOF FILM

摘要

To provide an environmental response type waterproof film which is excellent in waterproofness in usage and exhibits excellent easy collapsibility.SOLUTION: A waterproof film 1 includes a waterproof layer 10 containing a nanofiber of polysaccharide, in which the nanofiber of the polysaccharide contains amphiphilic polysaccharide or contains modified polysaccharide where at least a part is chemically modified. The waterproof layer preferably further contains a hydrophobizing agent. The polysaccharide is preferably derived from biomass. The polysaccharide is preferably at least one selected from the group consisting of cellulose, chitin and chitosan. A resin layer containing a biodegradable resin as a main component is preferably provided on at least one side of the waterproof layer.SELECTED DRAWING: Figure 1