Patent ID: 9411081
Filing Date: 2016-08-09
CPC Classification: B29C,B29K,G02B

Claim Text:
1. A method of manufacturing a polarizing plate that comprises a polyester resin base and a polarizing film comprising a polyvinyl alcohol resin laminated on the polyester resin base, the method comprising the steps of: stretching a laminate that comprises a polyvinyl alcohol resin layer laminated on the polyester resin base; dyeing the polyvinyl alcohol resin layer; and crystallizing the polyester resin base, wherein crystallization is performed at a temperature higher than the glass transition temperature of the polyester resin base, wherein the crystallization step is performed after the dyeing step, and wherein, in the crystallization step, the crystallization is performed so that the degree of crystallinity of the polyester resin base, represented as the heat of fusion determined by differential scanning calorimetry, is in the range from 25 to 45 mJ/mg.