| abstract |
PROBLEM TO BE SOLVED: To provide a polyester composition and a film which are less in gelled polymer generated at the time of melt extrusion, are excellent in heat resistance, and are excellent in film forming property. SOLUTION: An alkali metal amount Am (mol / ton) and an alkaline earth metal amount Em contained in the polyester are provided. (Mol / ton), phosphorus element amount Pm (mol / to) n) is controlled so as to satisfy the following equation (1). 5 <(Am / 2 + Em) / Pm ≦ 9 (1) |