| 摘要 |
<p>PROBLEM TO BE SOLVED: To prepare a polyester film for a metal forming can excellent in protection characteristics such as impact resistance, retort resistance, rust resistance in addition to a high molding workability. SOLUTION: A composition containing 20-70 wt.% polyethylene terephthalate resin (A) and 80-30 wt.% polybutylene terephthalate resin (B) based on the total of both and satisfying the following formulas (1) and (2) is used. 3.0<=ΔTmA<=15 (1) 4.0<=ΔTmB<=18 (2) (Wherein,ΔTmA=|TmA1-TmA2|,ΔTmB=|TmB1-TmB2|TmA1 or TmB1 shows a melting point (C) of the resin (A) or the resin (B) respectively before being made a film, and TmA2 or TmB2 shows the melting point (C) of the resin (A) or the resin (B) respectively after being made a film.).</p> |
