| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a white laminated polyester film for a reflection plate, achieving a high reflection rate and a high shielding property, and high in rigidity. <P>SOLUTION: The white polyester film for a reflection plate made by laminating polyester layers (A) on both sides of a void containing polyester layer (B), fulfills all the following conditions of (1)-(5). (1) Thickness of the polyester layer (A) is 12-40 μm. (2) The polyester layer (A) is constituted by using polyester and a component immiscible in polyester (an immiscible component), wherein the content of the immiscible component is 0.01-1.50 wt.% with respect to the polyester layer (A). (3) Thickness of the polyester film (B) is 250-450 μm. (4) A thermal contraction ratio of the laminated polyester film in each of a longitudinal direction and a width direction under 90°C×30 minutes is 0.0-0.5%. (5) Apparent density of the laminated polyester film is 0.5-0.9 g/cm<SP POS="POST">3</SP>. <P>COPYRIGHT: (C)2013,JPO&INPIT |
