| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject film reduced in the lowering of transmittance caused by the irradiation of ultraviolet light and excellent in ultraviolet light resistance. SOLUTION: This polyethersulfone film contains an inorganic ultraviolet light-absorbing agent having an average particle diameter of 0.01-5μm in an amount of 0.05-3.0wt.%, and has a whole light transmittance of >=80% and a light transmittance lowering degree of <=1.5% at a wavelength of 400nm, wherein the lowering of the light transmittance is caused by the irradiation of ultraviolet light having an integrated light quantity of 3000mJ/cm<2> at a wavelength of 254nm.
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