| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated polyester film capable of suppressing both of the defect of bright spots due to the surface precipitation of an oligomer at the time of heating processing and a rise in haze, more detailed, a laminated polyester film usable even in an optical use. SOLUTION: In the laminated polyester film having a lamination film at least on one side thereof, the average size of oligomer particles precipitated on the side of the lamination film when the film is heated at 150°C for 60 min is 10μm<SP>2</SP>or below in terms of an area and the number of them is 100 or below in a visual field of 100×100μm. COPYRIGHT: (C)2008,JPO&INPIT |
