| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially stretched polyester film having high levels of moldability and dimensional stability, excellent fabricated external appearance and excellent productivity.SOLUTION: A biaxially oriented polyester film being the biaxially stretched polyester film has the crystallinity of ≥35% and <45% when measured by a temperature-modulated differential scanning calorimeter, the movable amorphous amount of ≥15% and <25%, the glass transition temperature of ≥85°C and <95°C, ≥250°C melting point and the Young's modulus of ≥2 GPa and <5 GPa in the longitudinal and width directions thereof. |
