| 摘要 |
PROBLEM TO BE SOLVED: To obtain a laminated polyester film excellent in processability, adhesiveness and scratch resistance and also excellent in wheatherability. SOLUTION: In the laminated polyester film continuously formed using a coextrusion method and containing three or more polyester layers, light transmittance at a wavelength of 370 nm is not more than 3%, haze is not more than 3%, a refractive index in a thickness direction is 1.490-1.505, surface roughness Ra is 3-30 nm and the concentration of an ultraviolet absorber in each of layers satisfies a specific range. COPYRIGHT: (C)2004,JPO
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