| 摘要 |
PROBLEM TO BE SOLVED: To be excellent in scratch resistance by a method in which a polyester film is laminated on a metal plate, and the dynamic coefficient of friction between the film and the metal at a specified temperature is arranged to be a specified value or less. SOLUTION: In a laminated metal plate, a polyester film is laminated on a metal plate, by arranging the dynamic coefficient of friction between the film and the metal at 80 deg.C to be 0.45 or loss, the film has a practical level of scratch resistance, and a metal container with good appearance is obtained even at a higher cam making speed. In the used polyester film, the content of the cyclic trimer of ethylene terephthalate produced in a polymerization process and a film making process is made 0.7wt.% or less of the total polyester. When the content exceeds 0.7wt.%, the oligomer migrates into food for a can-inside laminated film, and the oligomer is deposited on the surface of the film for a can-outside laminated film to deteriorate the appearance. |
