Method of manufacturing optical film, optical film, deflection plate, and liquid crystal display device
A technology of optical film and convex part, applied in the direction of optics, optical elements, polarizing elements, etc., can solve the problems of yield reduction, blocking, film surface adhesion, etc.
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[0246] According to the method for producing an optical film by the solution casting film forming method of the present invention, a cellulose triacetate film is produced as follows.
[0247] (mucil composition 1)
[0248]
[0249] Put the material of the above-mentioned dope composition 1 into an airtight container, dissolve it completely while heating and stirring, and filter. Filtration After filtering with a filter press, it was passed through a metal sintered filter (captured particle diameter=10 micrometers). Next, use Figure 6 In the solution casting film-making device shown, at a temperature of 35°C, the dope is uniformly cast on a stainless steel belt support body with a width of 1800mm at a temperature of 35°C. Moreover, the molecular weight distribution of the cellulose triacetate differed, and the thing which showed two kinds of glass transition temperature Tg (degreeC) shown in Table 1 was used.
[0250] On the stainless steel belt support, the solvent was ...
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