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公开(公告)号：US20150177434A1
公开(公告)日：2015-06-25
申请号：US14564337
申请日：2014-12-09
Applicant: NITTO DENKO CORPORATION
Inventor： Satoru Kunikata , Shusaku Goto , Minoru Miyatake , Kentarou Yoshida
CPC classification number: G02B5/305 , B32B37/025 , B32B2037/243 , B32B2038/0028 , B32B2038/168 , B32B2309/105 , G02B5/3033 , Y10T428/31935
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20150132561A1
公开(公告)日：2015-05-14
申请号：US14488738
申请日：2014-09-17
Applicant: NITTO DENKO CORPORATION
Inventor： Shusaku Goto , Yoshifumi Yamamoto , Kentaro Ikeshima
CPC classification number: G02B5/305 , B29C55/005 , B29C55/02 , B29D11/00644 , B29D11/00894 , B29K2029/00 , B29K2029/04 , G02B1/04 , G02B1/08 , G02B5/3033
Abstract: There is provided a polarizing film that is excellent in optical characteristics, and is excellent in durability and water resistance. A polarizing film according to an embodiment of the present invention includes a polyvinyl alcohol-based resin film having a thickness of 10 μm or less. The polyvinyl alcohol-based resin film has an iodine concentration of 8.5 wt % or more; and the polarizing film has a cross-linking index defined by the below-indicated equation of from 100 to 200. (Cross-linking index)=(Iodine concentration in film)×(Boric acid concentration in film)
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公开(公告)号：US20140063603A1
公开(公告)日：2014-03-06
申请号：US13959818
申请日：2013-08-06
Applicant: NITTO DENKO CORPORATION
Inventor： Shusaku Goto , Kentaro Ikeshima , Yuuki Nakano , Osamu Kaneko
CPC classification number: B29D11/0073 , B29D11/00644 , B32B2307/42 , G02B5/3025 , G02B5/305 , G02F1/133528 , Y10T156/1052 , Y10T156/1067
Abstract: A method of manufacturing a polarizing plate according to an embodiment of the present invention includes: stretching and dyeing a laminate including a resin substrate having a long shape and a polyvinyl alcohol-based resin layer formed on one side of the resin substrate, to thereby produce a polarizing film on the resin substrate; laminating an optically functional film on a side of the polarizing film of the laminate, to thereby produce an optically functional film laminate; and cutting widthwise direction end portions of the optically functional film laminate. The cut portions include the resin substrate, the polarizing film, and the optically functional film.
Abstract translation: 根据本发明的实施方式的偏光板的制造方法包括：将形成有树脂基板的树脂基板和形成在树脂基板一侧的聚乙烯醇系树脂层的层叠体进行拉伸染色，由此制造 树脂基板上的偏光膜; 在层压体的偏振膜的一侧层叠光学功能膜，由此制造光学功能膜层压体; 以及切割光学功能膜层叠体的宽度方向端部。 切割部分包括树脂基板，偏振膜和光学功能膜。
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