Film and method for producing same, polarizing plate using same, and liquid crystal display
一种液晶显示装置、制造方法的技术，应用在光学、光学元件、偏振元件等方向，能够解决偏光板卷曲控制不充分等问题
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Embodiment 1
[0441] "Manufacturing of Retardation Films"
[0442] (Fabrication of Retardation Film 101)
[0443] About cellulose ester, it changed using the degree of substitution and the kind of a substituent shown in Table 1.
[0444] [Table 1]
[0445] Cellulose ester
Acetyl
Propionyl
total degree of substitution
A
1.6
0.8
2.4
B
1.6
0.9
2.5
C
1.7
0.9
2.6
D
1.8
1.0
2.8
E
2.7
-
2.7
[0446]
[0447] Microparticles (Aerosil R972V (manufactured by Aerosil Japan)) 11 parts by mass
[0448] (The average diameter of primary particles is 16nm, and the apparent specific gravity is 90g / liter)
[0449] 89 parts by mass of ethanol
[0450] The above was stirred and mixed with a dissolver for 50 minutes, and then dispersed with Manton-Gaulin.
[0451]
[0452] Cellulose ester A was added to a dissolution tank filled with dichloro...
Embodiment 2
[0548] (Production of protective film for polarizing plate with anti-reflection layer)
[0549] Using the polarizing plate protective films 201 to 203 prepared above, each polarizing plate protective film with an antireflection layer was produced in the following procedure.
[0550] The refractive index of each layer constituting the antireflection layer was measured by the following method.
[0551] (refractive index)
[0552]The refractive index of each refractive index layer was obtained from the measurement results of the spectral reflectance with a spectrophotometer for a sample in which each layer was individually coated on a hard coat film prepared below. The spectrophotometer uses U-4000 type (manufactured by Hitachi, Ltd.). After the measurement side of the sample is roughened, it is treated with black spray to absorb light to prevent light reflection on the inside. The measurement of reflectance in the visible light region (400nm to 700nm) was carried out under the...
Embodiment 3
[0601] When producing the retardation film 101 of Example 1, the following retardation films 401 to 403 were produced in the same manner except that the following heat treatment was added.
[0602]
[0603]After stretching by the tenter, the web is dried with a drying wind at 105° C. in the step of transporting the web by rollers arranged up and down to obtain a film that is dried to a residual solvent content of 0.3% by mass, and then When the obtained film was heat-treated for 20 minutes at 110° C. and an atmosphere with an air replacement rate of 25 times / hour, pressurized with a pressure of 10 kPa in the thickness direction of the film with multi-stage nip rolls. , cooled to room temperature, and wound up to produce a retardation film 401 with a width of 1.5 m, an embossing (knurling) of 1 cm in width and 8 μm in height at the end and a film thickness of 50 μm.
[0604] Retardation films 402 to 403 were produced in the same manner except that the heat treatment temperatu...
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