Protective film for polarizing plate and polarizing plate using the same
There are provided a protective film for a polarizing plate, wherein the protective film comprises a stretched film comprising a (meth)acryl-based resin and having an absolute value of a planar orientation coefficient ΔP of less than or equal to 2.5×10 −4 , and a polarizing plate comprising a polarizing film, and the protective film for a polarizing plate laminated on at least one surface of the polarizing film via an adhesive layer. The stretched film can be, for example, a biaxially stretched film.
1. A protective film for a polarizing plate, wherein the protective film comprises
a stretched film comprising a (meth)acryl-based resin and having an absolute value of a planar orientation coefficient ΔP of greater than or equal to 0.3×10 −4 and less than or equal to 2.5×10 −4 .
2. The protective film for a polarizing plate according to claim 1 , wherein the stretched film comprises rubber particles.
3. The protective film for a polarizing plate according to claim 1 , wherein the stretched film is a biaxially stretched film.
4. The protective film for a polarizing plate according to claim 1 , wherein the stretched film has a thickness of 10 to 150 μm.
5. The protective film for a polarizing plate according to claim 1 , further comprising a surface-treatment layer laminated on the stretched film.
6. The protective film for a polarizing plate according to claim 1 , wherein the stretched film has a thickness-directional phase retardation value R th in a range of −35 to 35 nm.
7. The protective film for a polarizing plate according to claim 1 , wherein the stretched film has an in-plane phase retardation value R 0 in a range of 0 to 15 nm.
8. A polarizing plate comprising:
a polarizing film, and
the protective film for a polarizing plate according to claim 1 laminated on at least one surface of the polarizing film via an adhesive layer.
9. A polarizing plate according to claim 8 , wherein the adhesive layer comprises a cured product of at least one component selected from a group consisting of an epoxy compound, an oxetane compound and a (meth)acryl-based compound.