| 摘要 |
PROBLEM TO BE SOLVED: To improve the weatherability and whiting properties of a film and its adhesion to an accepting layer by a method wherein two or more white laminating polyester layers are laminated to one another and the yellowing factor caused by the irradiation of ultraviolet rays is set to be not more than the specified value. SOLUTION: A white laminated polyester film is produced by laminating at least a white polyester layer A and a white polyester layer B. In this case, the white polyester layer A is a layer, which is made of a polyester and includes a shite dye and inorganic fine particles, or a layer, in which an infinite number of microscopic bubbles are generated so as to scatter light by these microscopic bubbles in order to realize a white opaque layer, and to which a weatherability is given. On the other hand, the white polyester layer B is a layer including microscopic bubbles. Further, the yellowing factor through the irradiation of ultraviolet rays according to JIS K-7103 measured from the white polyester layer A side of the white laminated polyester film is set to be 45 or less. |
