Cellulose acylate film, polarizing plate using same and liquid crystal display device
A technology of cellulose acylate and acylate film, which can be used in polarizing elements, instruments, optical elements, etc., and can solve problems such as display unevenness
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Embodiment 1 and comparative example 1
[0174] (1) Film formation of cellulose acylate film
[0175]
[0176] A cellulose acylate having an acetyl substitution degree of 2.87 was prepared. For the catalyst, sulfuric acid (in an amount of 7.8 parts by mass relative to 100 parts by mass of cellulose) was added, and carboxylic acid as a raw material of the acyl substituent was added for acylation at 40°C. After acylation, aging was performed at 40°C. Then, the low molecular weight components of the cellulose acylate were removed by washing with acetone.
[0177]
[0178] (Preparation of Cellulose Acylate Solution)
[0179] Cellulose acylate solution 1 was prepared by adding the following components to a mixing tank and stirring to dissolve the components.
[0180]
[0181] (Preparation of matting agent solution 2)
[0182] Matting agent solution 2 was prepared by adding the following components into a disperser and dispersing.
[0183]
[0184] (Preparation of UV absorber solution 3)
[0185] UV absorbe...
Embodiment 2 and comparative example 2
[0221] (2) Preparation of polarizer
[0222] {Saponification treatment of polarizer protective film}
[0223] The polarizer protective film prepared in Example 1 was immersed in 2.3 mol / L sodium hydroxide aqueous solution at 55° C. for 3 minutes. Then, the membrane was washed in a water washing bath at room temperature, and then neutralized with 0.05 mol / L sulfuric acid at 30°C. Then, the membrane was washed again in a water washing bath at room temperature, and dried in a stream of hot air at 100°C. Thus, the surface of the polarizer protective film of Example 1 was saponified.
[0224] {Preparation of Polarizer}
[0225] A polarizing element was produced by adsorbing iodine on a stretched polyvinyl alcohol film.
[0226] The saponified polarizer protective film 101 of Example 1 was stuck on one surface of the polarizing element using a polyvinyl alcohol adhesive. A commercially available cellulose triacetate film (commercial name: Fujitac TD80UF, produced by FUJIFILM Co...
Embodiment 3 and comparative example 3
[0231] (Manufacture of liquid crystal display devices)
[0232]A commercially available liquid crystal television (BRAVIA J5000, produced by Sony Corporation) was peeled off from the polarizer disposed on the viewer's side, and the polarizer 201 of the present invention using the polarizer protective film 101 of Example 1 was incorporated using an adhesive , so that the polarizer protective film 101 is located on one side of the liquid crystal cell ( figure 1 Membranes in 31). The transmission axis of the polarizer on the viewer's side was set vertically. The situation is as figure 1 shown in the schematic diagram. The liquid crystal display device thus manufactured is assembled in the following order from the lower side of the drawings: light source 26, light guide plate 25, first polarizing plate 21A (polarizing element 32, polarizing films 31a and 31b), including alignment film and transparent An array substrate 24 of electrodes, a liquid crystal layer 23, a color filte...
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Abstract
Description
Claims
Application Information
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