Sheet polarizer and a fabricating method thereof

Abstract

This invention provides a sheet polarizer,including polyvinyl alcohols polarizing film, sticking agent layer separated from polyvinyl alcohols polarizing film through at least on face and overlapped with protect film. Said sticking agent layer is comprised of sticking agent components containing followed water solution. Said water solution contains acetyl modified PVA resin and glyoxylate indicated by formula (I) and has a pH valve ranged in 4-10. where, the content of acetyl modified PVA resin is 1-8%( percentage by weight) compared to the 100% water(percentage by weight), the weight ratio of acetyl modified PVA resin with the solid glyoxylate is in the range of 1:0.03-0.25. in formula (I) , M represents alkali metals or alkaline-earth metals, n represents valence mumber correspond to M, indicating 1 or 2. According to said sheet polarizer, sticking property together with warm water resistance between the polarizing film and the protect film are improved.

Description

technical field The present invention relates to a polarizing plate in which a protective film is laminated on at least one surface of a polarizing film made of a polyvinyl alcohol-based resin via an adhesive layer, and a method for producing the same. Background technique A polarizing plate generally has a polarizing film formed of a polyvinyl alcohol-based resin adsorbed and aligned with a dichroic dye, and a protective film laminated on one or both sides of the polarizing film with an adhesive layer interposed therebetween. The polarizing plate is bonded to the liquid crystal cell with an adhesive through other optical films as needed, and becomes a component of the liquid crystal display device. As the use of liquid crystal display devices expands, it is required that they can be used in various environments. For this reason, components constituting liquid crystal display devices are required to have high environmental resistance. For example, liquid crystal display d...

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Problems solved by technology

However, in conventional polarizing plates in which a polarizing film and a protective film are laminated with an adhesive layer interposed therebetween, the polarizing performance tends to deteriorate, especially when exposed to a humid and hot environment for a long time, and the interface between the polarizing film and the protective film tends to peel off. such problem

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