| 摘要 |
PURPOSE:To improve gas barrier properties by forming the very thin-film layer of a metal or a metallic oxide onto at least one surface of a flexible synthetic resin film and laminating another synthetic resin film through aliphatic urethane group adhesives. CONSTITUTION:A thin-film layer 2 composed of a metal such as aluminum, zinc, etc., or a metallic oxide such as magnesium oxide, calcium oxide, silicon oxide, etc., is shaped onto at least one surface of a flexible plastic film 1 consisting of polyethylene, polypropylene, etc.,in the thickness of 100-10000Angstrom . Another plastic film 4 excellent in strength, heat-sealing characteristics, etc., as a film for packaging is laminated onto the thin-film layer 2 through aliphatic urethane group adhesives 3. Accordingly, the film for packaging superior in gas barrier properties such as moisture resistance, perfume preserving properties, etc., can be acquired. |
