| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester film excellent in terms of mechanical strengths, beam transmissivity, gas barrier property, molding ease, mold releasability, UV resistance, insulating capacity, and productivity.SOLUTION: The provided polyester film is a polyester film including a polyester layer (W layer) containing an aromatic polyester resin (A) and a component (B) incompatible with the polyester resin (A) wherein the incompatible component (B) includes an acid-modified polyolefin resin (b2), wherein the incompatible component (B) is dispersed within the polyester layer (W layer) as a dispersion having a flatness of at least 10, wherein the volume occupancy of the dispersion within the polyester layer (W layer) is 3% vol.% or above and below 50 vol.%, and wherein the volume occupancy of bubbles within the polyester layer (W layer) is below 3 vol.%. |
