To prevent a remarkable deterioration of an external appearance due to generation of rust of a metal can material and prevent migration of rust component to foods by laminating a film for laminating a metal plate containing a thermoplastic resin having no pinhole of specific diameter or more in a part to be laminated at least one a metal.
A film is necessary that a pinhole of 0.1 mm or more of a diameter is not existed in a part to be laminated at least on a metal. If the pinhole has 0.1 mm or less in diameter, the pinhole is blocked by an infinitesimal dimensional change or fluidization due to a heat history of the film at the time of laminating by a thermal press bonding to a metal plate, and rust preventive characteristics of a metal can material can be maintained. All pinholes of 0.1 mm in diameter can be detected by a pinhole detector of a high voltage application type. And, lamination of the film of the metal plate may be on one side surface of both side surface. A metal container is obtained by molding by using a laminated metal plate.
NAGANO HIROMU
KUZE KATSURO
ISAKA TSUTOMU
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