"Examples of the resin film which may be formed include a film of a thermoplastic resin such as a polyurethane resin, a nylon resin, a modified nylon resin, a polyethylene terephthalate resin, a polyvinyl chloride resin, a polycarbonate resin, a polyvinylidene chloride resin, an ethyl cellulose resin, and a cellulose acetate resin." . . . .