| http://www.w3.org/ns/prov#value | - As a method for laminating, a method wherein the sheet of biopolymeric material is laminated on the polyurethane film after swelling the surface of the polyurethane film after swelling the surface of the polyurethane film with an organic solvent which can swell the film surface moderately, for example, alcohols and such as methanol and so on, and dried, and a method wherein the polyurethane film i
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