基本信息:
- 专利标题： 光学膜、光学膜的制造方法、偏振片以及液晶显示装置
- 专利标题（英）：Optical film, method for producing optical film, polarizing plate and liquid crystal display device
- 申请号：CN200980138829.5 申请日：2009-08-10
- 公开(公告)号：CN102171020B 公开(公告)日：2013-09-11
- 发明人： 玉川美典
- 申请人： 柯尼卡美能达精密光学株式会社
- 申请人地址： 日本东京都
- 专利权人： 柯尼卡美能达精密光学株式会社
- 当前专利权人： 柯尼卡美能达精密光学株式会社
- 当前专利权人地址： 日本东京都
- 代理机构： 北京市柳沈律师事务所
- 代理人： 张平元
- 优先权： 259448/08 2008.10.06 JP
- 国际申请： PCT/JP2009/064122 2009.08.10
- 国际公布： WO2010/041513 JA 2010.04.15
- 进入国家日期： 2011-03-31
- 主分类号： B29C47/00
- IPC分类号： B29C47/00 ; B29C47/14 ; C08J5/18 ; B29C55/02 ; G02B5/30 ; G02F1/1335 ; B29K1/00 ; B29K79/00 ; B29L7/00 ; B29L11/00
Disclosed is an optical film having improved moisture absorption, heat resistance and brittleness at the same time. The optical film rarely causes light leakage, and has good reworkability. Also disclosed are a method for producing the optical film, a polarizing plate and a liquid crystal display device. The optical film is characterized in that the film contains an acrylic resin (A) and a cellulose ester resin (B) at a mass ratio of from 95:5 to 30:70, that the acrylic resin (A) has a weight average molecular weight Mw of not less than 110,000 but not more than 1,000,000, that the total degree of substitution (T) of acyl groups of the cellulose ester resin (B) is not less than 2.0 but not more than 3.0, and the substitution degree of acyl groups having 3-7 carbon atoms is not less than 1.2 but not more than 3.0, that the cellulose ester resin (B) has a weight average molecular weight Mw of not less than 75,000 but not more than 300,000, that the film has a tension softening point of 105-145°C and a folding endurance of 50-100 times, and that the film is produced by melt casting.
公开/授权文献:
- CN102171020A 光学膜、光学膜的制造方法、偏振片以及液晶显示装置 公开/授权日：2011-08-31