| 摘要 |
PROBLEM TO BE SOLVED: To provide a lid material which is inexpensive and is easy to unseal with excellent operativity and handlability by laminating a constituent comprising a mixture of a low density polyethylene(LDPE) resin and an ethylene-α olefin copolymer resin on a base layer by an extrusion laminating method. SOLUTION: An aluminum deposited PET film (GL film) comprising aluminum oxide with a thickness of appropriately 250 angstroms formed on a PET film with a thickness of 12 μm by vacuum deposition is prepared as a base layer 11. A mixture resin comprising an LDPE resin and an ethylene-α olefin copolymer resin which are blended at a ratio of 7:3 is separately prepared. While the mixture resin is brought into contact with an oxide aluminum film deposited surface of the GL film while forming a heat-sealing layer 12 of 60 μm by an extrusion laminating method at a resin temperature of approximately 260 deg.C. At this time, 3 g/m2 of a polyester resin based two-part reactive type adhesive is used as an adhesive layer 13 between the base layer 11 and the heat-sealing layer 12. |
