abstract |
PROBLEM TO BE SOLVED: To provide a polyester film for metal plate laminating processing which has excellent moldability, appearance after retorting, heat embrittlement resistance, retort resistance, and excellent film forming properties. . SOLUTION: A polyester composition comprising 10 to 70% by weight of a polyethylene terephthalate copolymer (I) having a melting point of 210 to 250 ° C and 30 to 90% by weight of a polybutylene terephthalate (II) having a melting point of 170 to 223 ° C. Wherein the shortest crystallization time of the film is 30 to 100 seconds, Film for metal plate lamination processing. |