METHOD FOR PRODUCING POLARIZING LAMINATE FILM AND POLARIZING PLATE

摘要

The present invention provides a method for producing a polarizing laminate film which is a thin plate and has excellent strength. A method for producing a polarizing laminate film having a polarizing film layer on a base film comprises the steps of: producing a polyvinyl alcohol-based resin layer on a base film; extending a laminator obtained from the step of producing a resin layer; and producing a polarizing film layer by coloring the polyvinyl alcohol-based resin layer through dichroic colors after the step of extending the laminator. The step of producing a polarizing film layer comprises a drying treatment in which a temperature parameter obtained by multiplying drying temperature (°C) by drying time (minute) is 220-350 after coloring the polyvinyl alcohol-based resin layer through the dichroic colors.