| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical laminated biaxially stretched polyester film for realizing the reduction of an interference color fringe and the enhancement of the boiling test endurance of adhesiveness at the time of hard coat processing and the reduction of a thermally precipitated oligomer at the time of heating while holding the conventional advantage of a transparent laminated film using a biaxially stretched polyester film. <P>SOLUTION: The optical laminated biaxially stretched polyester film is characterized in that the amplitude of the ripple of spectral reflectivity at a wavelength of 450-600 nm after a hard coat layer with a refractive index of 1.45-1.55 is laminated on a lamination film (A) is 2.0% or below, hard coat adhesion force after one-hr boiling is 90% or above and the size per one oligomer particle precipitated on the lamination film (A) after heating at 150°C for 60 min in a state that the hard coat layer is not laminated on the lamination film (A) is 30μm<SP>2</SP>or below in terms of an area. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
