| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a protective film for an optical disk, which is useful for protecting an information recording layer of an optical disk, especially a blue ray disk, has no adverse effect on recording properties of an optical disk and is controlled of corrosion on a metal reflection film and an information recording layer of an optical disk. <P>SOLUTION: The protective film for an optical disk has a light-transmitting substrate film and an adhesive layer formed on one side of the film, ≤0.08 difference in refractive index between the light-transmitting substrate film and the adhesive layer and ≥65% by mass of gel fraction of the adhesive layer. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
