发明申请
- 专利标题: RETARDATION FILM, METHOD FOR PRODUCING RETARDATION FILM, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY
- 专利标题(中): 延迟膜,制造延迟膜的方法,极化板和液晶显示
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申请号: US12095806申请日: 2006-11-22
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公开(公告)号: US20090169772A1公开(公告)日: 2009-07-02
- 发明人: Rumiko Yamada , Toshiaki Shibue , Nobuo Kubo
- 申请人: Rumiko Yamada , Toshiaki Shibue , Nobuo Kubo
- 申请人地址: JP hachioji-shi
- 专利权人: KONICA MINOLTA OPTO, INC.
- 当前专利权人: KONICA MINOLTA OPTO, INC.
- 当前专利权人地址: JP hachioji-shi
- 优先权: JP2005-356179 20051209
- 国际申请: PCT/JP2006/323300 WO 20061122
- 主分类号: C09K19/02
- IPC分类号: C09K19/02 ; B29C47/88 ; C08B1/00 ; C08G63/00 ; C08G64/00
摘要:
Disclosed are a retardation film, a method for producing the retardation film, a polarizing plate comprising the retardation film, and a liquid crystal display comprising the polarizing plate. Specifically disclosed is a method for producing a retardation film, which comprises an extrusion step for extruding a composition containing a thermoplastic resin and having a temperature of To [° C.] from a die; a cooling step for cooling a film extruded from the die and having a glass transition temperature of Tg [° C.] to a temperature Ta [° C.]; a heating step for heating the cooled film to a temperature Tb [° C.] at least once; and a stretching step for cooling the heated film to a temperature Tc [° C.] and then stretching the cooled film in the width direction.