POLYESTER COMPOSITE FILM, LAMINATED METAL PLATE AND METAL CONTAINER

PROBLEM TO BE SOLVED: To improve high temperature slip of a film and metal by a method in which a polyester layer in which a dynamic friction coefficient of a composite film and metal at a specified temperature is not exceeding a specified value and a polyester layer the melting point of which is in a specified range are constituents, and the number of pin holes at least a specified value in diameter is made not greater than a specified value. SOLUTION: A polyester composite film is composed of a polyester layer (A layer) in which the dynamic friction coefficient of the A layer and metal at 80 deg.C is not exceeding 0.45 and a polyester layer (B layer) the melting point of which is 180-240 deg.C. When the dynamic friction coefficient is not exceeding 0.45, scratch resistance comes to a practical level so that a metal container with good appearance is obtained even at an elevated can making speed. The melting point below 180 deg.C is low in terms of heat resistance, generating wrinkles during lamination, while the melting point above 240 deg.C causes deterioration in heat adhesion so that an adhesive is required for lamination. The number of pin holes at least 0.1mm in diameter is made not exceeding 0/1000m . When the diameter is not exceeding 0.1mm, the pin holes can be blocked during lamination.