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    • 6. 发明申请
    • POLARIZING PLATE AND METHOD OF PRODUCING POLARIZING PLATE
    • 极化板和生产偏光板的方法
    • US20150177434A1
    • 2015-06-25
    • US14564337
    • 2014-12-09
    • NITTO DENKO CORPORATION
    • Satoru KunikataShusaku GotoMinoru MiyatakeKentarou Yoshida
    • G02B5/30B32B37/00B32B38/08B32B37/24B32B27/30B32B38/00
    • G02B5/305B32B37/025B32B2037/243B32B2038/0028B32B2038/168B32B2309/105G02B5/3033Y10T428/31935
    • There is provided a method of producing a polarizing plate by which a polarizing film can be produced without the occurrence of a problem such as peeling between a resin substrate and a polyvinyl alcohol-based resin layer, and after the production of the polarizing film, the polarizing film and the resin substrate can be peeled without limitations on a peel direction and a peel angle, and a polarizing plate excellent in external appearance can be obtained. A method of producing a polarizing plate according to an embodiment of the present invention 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.
    • 提供一种制造偏振片的方法,通过该方法可以产生偏振膜,而不会出现树脂基板和聚乙烯醇类树脂层之间的剥离等问题,并且在制造偏振膜之后, 可以在剥离方向和剥离角度方面不受限制地剥离偏光膜和树脂基板,并且可以获得外观优异的偏振片。 根据本发明的实施方式的偏振片的制造方法包括:将含有聚乙烯醇系树脂和表面活性剂的涂布液涂布在树脂基板上,制造形成有聚乙烯醇系树脂层的层叠体 在树脂基板上; 对形成在树脂基板上的聚乙烯醇系树脂层进行拉伸染色,制作偏光膜; 在所述层叠体的偏振膜侧层叠光学功能膜,制造光学功能膜层压体; 以及从光学功能膜层压体剥离树脂基板。 相对于100重量份的聚乙烯醇类树脂,涂布液中的表面活性剂的含量小于1重量份。