发明授权
- 专利标题： Stretched cellulose ester film, polarizing plate and liquid crystal display employing the same
- 专利标题（中）： 拉伸纤维素酯膜，偏振片和使用其的液晶显示器
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申请号： US11204405申请日： 2005-08-16
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公开(公告)号： US07790249B2公开(公告)日： 2010-09-07
- 发明人: Isamu Michihata , Kunio Shimizu
- 申请人： Isamu Michihata , Kunio Shimizu
- 申请人地址： JP Tokyo
- 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 Tokyo
- 代理机构： Lucas & Mercanti, LLP
- 优先权： JP2004-244772 20040825
- 主分类号： G02F1/13363
- IPC分类号： G02F1/13363
摘要：
A stretched cellulose ester film produced by stretching after film forming employing a cellulose ester including a polyester polyol obtained from (a) a glycol having an average carbon atom number of 2 to 3.5 and (b) a dibasic or an anhydrous dibasic acid having an average carbon number of 4 to 5.5, wherein the stretched cellulose ester film exhibits retardation value Ro in the range of 30 to 200 nm, and a retardation value Rt in the range of 70 to 400 nm, Ro and Rt are each defined by specific Formulas (1) and (2).