| 摘要 |
PROBLEM TO BE SOLVED: To provide a white polyester film suppressed from adhesion to a light guide plate and occurrence of flaws on the light guide plate.SOLUTION: The white film is composed of at least 3 layers where the surface roughness SRa of film surfaces of both surface layers is greater than 0.5 μm, SRz is greater than 3.0 μm, and Ssk indicating a coefficient of skewness of a roughness curve of the film surface is less than 0.05 and greater than -2.SELECTED DRAWING: None |
