Cellulose acylate film, phase-difference film, polarizing plate, and liquid-crystal display device
A technology of cellulose acylate and acylate film, which is applied in the direction of polarizing elements, instruments, optical elements, etc., can solve the problems of film performance changes, achieve low water content, prevent polarizer deterioration, and exhibit good optical properties. Effect
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Embodiment 1~8
[0319] [Examples 1 to 8, Comparative Examples 2 to 13]
[0320] [Production of cellulose acylate film]
[0321] The cellulose acylate films of Examples 1 to 8 and Comparative Examples 2 to 13 were produced in the same manner as Comparative Example 1, except for the degree of substitution of cellulose acetate, the type and amount of carbohydrate derivatives, and The stretching temperature, the stretching ratio during stretching, and the film thickness were changed in Table 5 below.
[0322] In Table 5 below, the amount of carbohydrate derivatives is based on parts by mass relative to 100 parts by mass of cellulose acylate resin.
[0323] [Saponification treatment of cellulose acylate film and manufacture of polarizing plate]
[0324] In the same manner as in Comparative Example 1, the cellulose acylate films of Examples 1 to 8 and Comparative Examples 2 to 13 were respectively subjected to saponification treatment and used in the manufacture of polarizing plates, thereby making the pola...
Embodiment 9~12
[0366] [Production of cellulose acylate film]
[0367] The cellulose acylate films of Examples 9 to 12 were produced in the same manner as Comparative Example 14, except that the type and amount of carbohydrate derivatives in Comparative Example 14 were changed in Table 6 below. In Table 6 below, the amount of carbohydrate derivatives is based on the ratio (mass %) relative to cellulose acylate.
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