| abstract |
An easily adhesive polyester film roll for optical use and a hard coat film having excellent transparency, weather resistance, processability, stable color tone in the longitudinal direction and width direction of the film roll, and ultraviolet light shielding properties. An optical easy-adhesion having an easy-adhesion layer on at least one surface of a biaxially oriented polyester film containing an ultraviolet absorber, having a thickness of 25-300 μm, a width of 400-1500 mm, and a winding length of 400-10000 m. A biaxially oriented polyester film having a haze value of 3% or less, a light transmittance of 3% or less at a wavelength of 380 nm or less, and a b * of 1.5 or less. Is an easily adhesive polyester film for optical use, characterized in that the variation in the width direction and the longitudinal direction of the color b * is 80% or less, and the variation in the width direction and the longitudinal direction of the light transmittance at a wavelength of 380 nm is 90% or less. roll. [Selection figure] None |