Polarizing plate and method of producing polarizing plate

Abstract

A method of producing a polarizing plate according to an embodiment includes: applying an application liquid containing a polyvinyl alcohol-based resin and a surfactant onto a resin substrate to produce a laminate in which a polyvinyl alcohol-based resin layer is formed on the resin substrate; stretching and dyeing the polyvinyl alcohol-based resin layer formed on the resin substrate to produce a polarizing film; laminating an optical functional film on a polarizing film side of the laminate to produce an optical functional film laminate; and peeling the resin substrate from the optical functional film laminate. A content of the surfactant in the application liquid is less than 1 part by weight with respect to 100 parts by weight of the polyvinyl alcohol-based resin.

What is claimed is: 
     
         1 . A polarizing plate obtained by a method, comprising:
 applying an application liquid containing a polyvinyl alcohol-based resin and a surfactant onto a resin substrate to produce a laminate in which a polyvinyl alcohol-based resin layer is formed on the resin substrate;   stretching and dyeing the polyvinyl alcohol-based resin layer formed on the resin substrate to produce a polarizing film;   laminating an optical functional film on a polarizing film side of the laminate to produce an optical functional film laminate; and   peeling the resin substrate from the optical functional film laminate,   wherein a content of the surfactant in the application liquid is less than 1 part by weight and equal to or more than 0.02 part by weight with respect to 100 parts by weight of the polyvinyl alcohol-based resin.   
     
     
         2 . A laminate, comprising:
 a resin substrate; and   a polyvinyl alcohol-based resin layer formed on one side of the resin substrate,   wherein the polyvinyl alcohol-based resin layer is formed by applying, onto the resin substrate, an application liquid containing a polyvinyl alcohol-based resin and less than 1 part by weight and equal to or more than 0.02 part by weight of a surfactant with respect to 100 parts by weight of the polyvinyl alcohol-based resin.   
     
     
         3 . A laminate according to  claim 2 , wherein the application liquid contains 0.5 part by weight or less of the surfactant with respect to 100 parts by weight of the polyvinyl alcohol-based resin.