THERMAL ADHESION MULTILAYER POLYESTER FILM

摘要

PROBLEM TO BE SOLVED: To provide a polyester film useful as a corrosion resistant film of a metal material such as, for example, a beverage can or the like having excellent adhesive properties and scarcely-peeled-off properties even by heating or water containing. SOLUTION: In the multilayer film made of a plurality of polyester layers, the polyester layer for constituting at least one surface has less than 10 deg.C/min of a temperature raising speed capable of being detected at a crystal melting peak in the case of measuring the temperature raising by a DSC from an amorphous state and a melting point(MP) to be detected of 190 to 245 deg.C. Then, a constituting layer occupied by a thickness of 60% or more of an overall thickness of the multilayer film is constituted of a polyester having a melting point of MP+10 deg.C or higher.