Patent ID: 6512562
Filing Date: 2003-01-28
Classification: C08J,G02B,G02F

Abstract:
A protective film for a polarizing plate comprising: a base material, the protective film for the polarizing plate wherein in analysis of bonding state of a carbon atom (C1s)employing X-ray photoelectron spectroscopy, when a peak having the lowest bonding energy is designated as a first peak, a peak positioned at 1.60Â±0.3 eV on the higher bonding energy side from the first peak is designated as a second peak, and a peak positioned at 4.10Â±0.3 eV on the higher bonding energy side from the first peak is designated as a third peak, bonding state of carbon atom C1s on a surface of at least one side of the base material and bonding state of internal carbon atom C1s in an optional depth of 0.05 to 1 &mgr;m from the surface satisfy relationship described below:Sâˆ’I&gE;0.1 wherein S is intensity of the second peak on the base material surface of the protective film for the polarizing plate/intensity of the first peak on the base material surface of the protective film for the polarizing plate, and I is intensity of the second peak in the interior of the base material of the protective film for the polarizing plate/intensity of the first peak of the interior of the base material of the protective film for the polarizing plate.