发明申请
- 专利标题: PRODUCTION METHOD FOR BIREFRINGENT FILM, BIREFRINGENT FILM, AND LAMINATE
- 专利标题(中): 生产薄膜,双膜和层压板的生产方法
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申请号: US12440481申请日: 2007-08-29
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公开(公告)号: US20090262297A1公开(公告)日: 2009-10-22
- 发明人: Junzo Miyazaki , Shouichi Matsuda
- 申请人: Junzo Miyazaki , Shouichi Matsuda
- 申请人地址: JP Ibaraki-shi, 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 Ibaraki-shi, Osaka
- 优先权: JP2006-290758 20061026
- 国际申请: PCT/JP2007/066738 WO 20070829
- 主分类号: G02B1/08
- IPC分类号: G02B1/08 ; B05D5/12 ; B01J19/10 ; H05H1/00
摘要:
Provided is a production method for a thin birefringent film with a satisfactory alignment property, in which a refractive index is controlled three-dimensionally and optical properties are unlikely to decrease in the case where the birefringent film is placed under high temperature and high humidity. The production method for a birefringent film of the present invention includes: the step (1) of preparing a solution that exhibits a nematic liquid crystal phase, containing at least one kind of polycyclic compound containing a —SO3M group and/or a —COOM group (M represents a counter ion) and a solvent; the step (2) of preparing a base material at least one surface of which is subjected to a hydrophilization treatment; and the step (3) of applying the solution prepared in the step (1) to the surface of the base material prepared in the step (2), the surface being subjected to the hydrophilization treatment, followed by drying, in which a contact angle of water at 23° C. on the surface of the base material prepared in the step (2), the surface being subjected to the hydrophilization treatment is 45° or less.