abstract |
To provide a polyester film excellent in mechanical strength, light transmittance, gas barrier property, easy moldability, mold release property, UV resistance, insulation property, and productivity. A film comprising an aromatic polyester resin (A) and a polyester layer (W layer) containing a component (B) incompatible with the polyester resin (A), the incompatible component ( B) contains an acid-modified polyolefin resin (b2), and the incompatible component (B) is dispersed in the polyester layer (W layer) as a dispersion having a flatness of 10 or more, and the polyester layer ( A polyester film in which the volume occupancy of the dispersion in W layer is 3% or more and less than 50% by volume, and the volume occupancy of bubbles in the polyester layer (W layer) is less than 3% by volume. [Selection figure] None |