Patent ID: 8709192

Claim:
A method of forming a polarizing plate comprising: (A) providing at least one guarded cover sheet composites comprising: (i) a carrier substrate; and (ii) a protective cover sheet comprising a low birefringence protective polymer film having in-plane birefringence, Δn in of less than 1×10 −4 and an out-of-plane birefringence Δn th of 0.005 to −0.005 and, in addition, one or more functional layers, which layers are either adjacent or non-adjacent each other, wherein the one or more functional layers comprise at least an adhesion-promoting layer for adhering a poly(vinyl alcohol)-containing film to the low birefringence protective polymer film, wherein the functional layers do not comprise a polarizing film, wherein the adhesion-promoting layer which is a functional layer comprises a UV-absorbing polymer, and wherein the adhesion-promoting layer is coated onto the carrier substrate and then dried, prior to application of the low birefringence protective polymer film; (B) providing a poly(vinyl alcohol)-containing dichroic film; (C) removing the carrier substrate from the guarded cover sheet composite after formation of the protective cover sheet; and (D) bringing the protective cover sheet into contact with the poly(vinyl alcohol)-containing dichroic film such that the adhesion-promoting layer in the protective cover sheet is in contact with the poly(vinyl alcohol)-containing dichroic film.