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    • 3. 发明申请
    • Optical film and production method of the same
    • 光学薄膜及其制作方法相同
    • US20070013095A1
    • 2007-01-18
    • US11483613
    • 2006-07-11
    • Syouichi Sugitani
    • Syouichi Sugitani
    • B29C41/28B29C41/52
    • B29C41/28B01F3/1271B01F3/18B01F15/0445B29K2001/00B29K2001/12B29K2995/0034
    • A method of manufacturing an optical film using a solution casting method comprising the steps of: (i) preparing an initial dope comprising a cellulose ester resin; (ii) preparing a casting dope by diluting the initial dope with a diluting solution via inline dilution, the diluting solution having a solid content lower than a solid content of the initial dope; and (iii) casting the casting dope to form a cellulose ester film, wherein (a) an average orientation angle of the slow axis is 90°±1.5° or 0°±1.5° against a film transport direction of the cellulose ester film; and (b) a fluctuation of a viscosity or a fluctuation of a density of the casting dope is controlled so that a relative standard deviation of the fluctuation of the viscosity or the fluctuation of the density of the casting dope is in the range of 0.01-1%.
    • 一种使用溶液流延法制造光学膜的方法,包括以下步骤:(i)制备包含纤维素酯树脂的初始涂料; (ii)通过在线稀释用稀释溶液稀释初始涂料来制备浇注液,所述稀释溶液的固体含量低于初始涂料的固体含量; 和(iii)铸造所述浇铸料以形成纤维素酯膜,其中(a)所述慢轴的平均取向角相对于所述纤维素酯膜的膜输送方向为90°±1.5°或0°±1.5°; 并且(b)控制浇铸液的粘度波动或密度波动,使得粘度波动或铸塑液密度波动的相对标准偏差在0.01- 1%。