Protective cover sheet comprising a UV-absorbing layer for a polarizer plate and method of making the same
AssigneeEastman Kodak Company
InventorsYongcai Wang, Hwei-Ling Yau, Timothy Hubert, Alain Gros, Timothy Schunk, Paul Hoderlein
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Abstract
The invention relates to a protective cover sheet comprising a low birefringence protective polymer film and a layer that promotes adhesion to poly(vinyl alcohol), the protective cover sheet comprising at least one functional layer containing a UV-absorbing polymer.
Claims25
A multilayer protective cover sheet comprising a low birefringence protective polymer film and, in addition, one or more relatively thin 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, and wherein at least one of the functional layers comprise a UV-absorbing polymer.
A guarded cover sheet composite comprising a carrier substrate and a multilayer protective cover sheet comprising a low birefringence protective polymer film and, in addition, one or more relatively thin functional layers, which layers are either adjacent or non-adjacent to 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, which the adhesion-promoting layer is on the same side of the carrier substrate as the low birefringence protective polymer film, wherein at least one of the one or more functional layers is a UV-absorbing layer comprising a UV-absorbing polymer, and wherein optionally the UV-absorbing layer and the adhesion-promoting layer can be one and the same functional layer.
Dependencies are inferred from the claim text.