| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a white polyester film which has excellent folding processability and excellent stretchability while having high reflectivity.SOLUTION: There is provided a white polyester film having a polyester layer (A) on the surface thereof, in which the polyester layer (A) consists of polyester resin composition containing calcium carbonate particles, and the calcium carbonate particles have a content in the polyester layer (A) at less than 1 to 31 mass%, and 50% volume particle diameter D50 at 0.4 to 1.0μm. In the white polyester film, a degree of matching of a crystal plane normal line at Bragg angle 25° to 27° which is obtained by wide-angle X-ray diffraction measurement on the surface of the polyester layer (A) with respect to a film plane normal line is less than 0.8, and reflectance is 95% or more.</p> |
