| abstract |
PROBLEM TO BE SOLVED: To provide an optical film for display having a good optical property by a melt casting method using a raw material polymer of cellulose ester, little coloring, excellent haze and tear strength, and the optical film The manufacturing method of this, Furthermore, it is providing the polarizing plate and liquid crystal display device which used it as a protective film or retardation film. In a method for producing an optical film comprising at least one stabilizer, at least one plasticizer, and a cellulose resin powder, the cellulose resin powder and the at least one stabilizer are heated at a temperature. A method for producing an optical film, comprising: mixing a powder by Tmix, and then film-forming a film constituent material dried at a drying temperature Tdry having the following relationship by a melt casting method. Tmix <Tm−a ≦ Tdry <Tg [Selection figure] None |