| abstract |
(57) [Abstract] [Purpose] Having excellent deep drawability, impact resistance and heat resistance after can making when forming metal cans by deep drawing, for example, after canning after bonding with a metal plate. To provide a polyester film. The composition contains 0.005 to 3% by weight of particles of a metal salt of terephthalic acid or a metal salt containing an alkylene terephthalate component having an average particle diameter of 0.05 to 2.5 μm, and the melting point of the polymer is 210 to 245 ° C. It is made of copolyester and has a refractive index of 1.505 to the film thickness direction. A polyester film for metal plate laminating and forming, wherein the intrinsic viscosity of the polymer portion of the film is 1.550 and 0.52 to 0.80. |