| abstract |
The present invention provides a polyester film and a film roll obtained by winding the film. The polyester film has excellent heat resistance dimensional stability, impact strength characteristics, slip properties, mechanical properties, transparency, and gas barrier properties. The polyester film of the present invention is characterized by having at least one layer mainly composed of a polyester resin, and the polyester resin is composed of a dicarboxylic acid component having furan dicarboxylic acid as a main component and ethylene glycol as a main component. The composition of the diol component of the component; and the surface alignment coefficient △ P is 0.005 or more and 0.200 or less, the thickness is 1 μm or more and 300 μm or less, and the heat shrinkage at 150 ° C for 30 minutes is 3.2% or less in the MD and TD directions; A layer of at least one additive. |