POLYESTER FILM FOR METAL SHEET LAMINATING, METAL SHEET LAMINATED WITH THIS FILM, AND METAL VESSEL FORMED FROM THIS METAL SHEET

摘要

A polyester film for metal sheet laminating. The film comprises a blend of (I) polybutylene terephthalate or a polyester comprising it as the main ingredient with (II) polyethylene terephthalate or a polyester comprising it as the main ingredient, the contents of the polyester (I) and the polyester (II) being 80 to 40 wt.% and 20 to 60 wt.%, respectively. This film has a melting point of 200 to 223 DEG C attributable to the polyester (I) and a melting point of 230 to 256 DEG C attributable to the polyester (II). The film as a whole has an intrinsic viscosity of 0.75 or higher.