Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Sumio Ohtani0
Hiroyuki Kawanishi0
Seimi Satake0
Date of Patent
April 19, 2011
0Patent Application Number
116309590
Date Filed
June 27, 2005
0Patent Primary Examiner
Patent abstract
A cellulose acylate film is provided and is excellent in increasability of an in-plane retardation and a retardation in a thickness direction, from which an additive does not bleed out, and which is excellent in surface properties. The cellulose acylate film has a thickness of 40 μm to 180 μm and contains no retardation increasing agent. Retardation values Re and Rth of the cellulose acylate film meet the following formulae (III) to (V):46≦Re≦100 (III)Rth=a−5.9Re (IV)520≦a≦670 (V)
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