abstract |
The present invention provides a biaxially stretched polyester film having high formability and dimensional stability, good appearance after processing, and productivity. The degree of crystallinity measured by a temperature-modulated differential scanning calorimeter is 35% or more and less than 45%, the amount of movable amorphous material is 15% or more and less than 25%, the glass transition temperature is 85 ° C or more and less than 95 ° C, and the melting point is. A biaxially oriented polyester film having a temperature of 250 ° C. or higher and a Young's modulus in the longitudinal direction and the width direction of the film of 2 GPa or more and less than 5 GPa is used. [Selection figure] None |