发明授权
- 专利标题： Polarizing film, optical film laminate including polarizing film, and method for manufacturing the same
- 专利标题（中）： 偏振膜，包括偏光膜的光学膜层压体及其制造方法
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申请号： US13225333申请日： 2011-09-02
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公开(公告)号： US08771454B2公开(公告)日： 2014-07-08
- 发明人: Shusaku Goto , Takeharu Kitagawa , Minoru Miyatake , Tomohiro Mori , Takashi Kamijo
- 申请人： Shusaku Goto , Takeharu Kitagawa , Minoru Miyatake , Tomohiro Mori , Takashi Kamijo
- 申请人地址： JP Osaka
- 专利权人： Nitto Denko Corporation
- 当前专利权人： Nitto Denko Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Lowe Hauptman & Ham, LLP
- 优先权： JP2010-197413 20100903; JP2011-064786 20110323
- 主分类号： B29C65/00
- IPC分类号： B29C65/00 ; B32B7/02 ; B32B3/00 ; B29D11/00
摘要：
An optical film laminate includes a substrate including a crystallizable ester type thermoplastic resin in the form of a continuous web; and a polarizing film including a polyvinyl alcohol type resin layer formed on the substrate, said polarizing film including a dichroic material impregnated therein in a molecularly oriented state, wherein the polarizing film is formed by providing a laminate including the polyvinyl alcohol type resin layer formed on a substrate including a crystallizable ester type thermoplastic resin in an amorphous state and subjecting the laminate to a 2-stage stretching process including a preliminary in-air stretching and an in-boric-acid-solution stretching under a temperature maintaining the amorphous state of the substrate, such that the polyvinyl alcohol type resin layer is stretched to a thickness of 10 μm or less, the polarizing film having optical properties based on the formulae P>−(100.929T−42.4−1) ×100 (where T