| abstract |
(57) [Abstract] [Purpose] A metal can, such as a beverage can, which exhibits excellent moldability and is excellent in heat resistance and aroma retention when it is laminated with a metal plate and subjected to a drawing process such as drawing. Provided is a polyester film for laminating and forming a metal plate, which can be used for producing food cans and the like. [Structure] Copolymerized polyester (I) containing ethylene terephthalate as a main repeating unit having a melting point of 210 to 245 ° C. 99 to 60% by weight and polyester (II) 1 having a butylene terephthalate as a main repeating unit having a melting point of 180 to 223 ° C. To 40% by weight of the polyester composition, wherein the polyester composition has an average particle size of 0.05 to 2.5 μm of terephthalic acid metal salt or fine particles of metal salt containing an alkylene terephthalate component of 0.005. -3% by weight added, the film has a plane orientation coefficient of 0.08 to 0.16, and a heat shrinkage ratio at 150 ° C of 10 % And a density of less than 1.385 g / cm 3 , a polyester film for metal plate laminating and forming. |