发明授权
US09138947B2 Method for producing polarizer, polarizer, polarizing plate, optical film, and image display device
有权
用于制造偏振片，偏振片，偏振片，光学膜和图像显示装置的方法
- 专利标题： Method for producing polarizer, polarizer, polarizing plate, optical film, and image display device
- 专利标题（中）： 用于制造偏振片，偏振片，偏振片，光学膜和图像显示装置的方法
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申请号： US12743623申请日： 2008-12-04
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公开(公告)号： US09138947B2公开(公告)日： 2015-09-22
- 发明人: Kiyoe Shigetomi , Kazunori Futamura , Daisuke Ogomi , Tetsurou Takeda , Akinori Nishimura , Mitsuhiko Tsuji , Kenrou Murate
- 申请人： Kiyoe Shigetomi , Kazunori Futamura , Daisuke Ogomi , Tetsurou Takeda , Akinori Nishimura , Mitsuhiko Tsuji , Kenrou Murate
- 申请人地址： JP Ibaraki-shi
- 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 Ibaraki-shi
- 代理机构： Westerman, Hattori, Daniels & Adrian, LLP
- 优先权： JP2007-322179 20071213; JP2008-148385 20080605
- 国际申请： PCT/JP2008/072095 WO 20081204
- 国际公布： WO2009/075225 WO 20090618
- 主分类号： B05D3/12
- IPC分类号： B05D3/12 ; B05D7/04 ; B29D11/00 ; B29C55/04 ; G02B5/30 ; B29K29/00 ; B29K105/00 ; B29K105/24
摘要：
A method for producing a polarizer of the present invention includes: subjecting a polyvinyl alcohol film to at least a dyeing process, a crosslinking process and a stretching process, then subjecting the film, in which all of the processes have been performed, having a water content of 25 to 55% by weight to a drying process, wherein in the drying process, the water content of the film is reduced by at least 15% by weight, so that the film has a water content of 5 to 35% by weight, and the drying process has a quick drying stage in which the water content of the film is reduced by at least 10% by weight in a time period of ½ to 1/30 of the total drying time of the drying process. The polarizer obtained by the production method has durability and has good optical properties over a wide band.