Polyester film for metal plate laminate, film-laminated metal plate and metal container

摘要

The present invention provides a polyester film which shows, upon preparation of a film-laminated metal plate by laminating the film on one side of the metal plate made of a tin free steel, a coefficient of kinetic friction at 80 DEG C at the surface thereof of not more than 0.45 and an ethylene terephthalate cyclic trimer content of not more than 0.70 wt%, and a dimensional change of not more than 2.0% after a heat treatment at 210 DEG C for 2 minutes of the film-laminated metal plate. This polyester film is superior in heat resistance, barrier property and corrosion resistance, and is preferably used as a material forming a metal container for food.