Unlock instant, AI-driven research and patent intelligence for your innovation.

Cellulose acylate film, polarizing sheet and liquid crystal display device

A cellulose acylate, film technology, applied in polarizing elements, instruments, optics, etc., can solve the problem of not being able to achieve flat dispersion or inverse dispersion, low haze and high optical performance at the same time, and achieve good contrast, color tone. Improved, high optical performance effects

Inactive Publication Date: 2011-07-20
FUJIFILM CORP
View PDF48 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the cellulose acylate films can achieve flat dispersion or reverse dispersion, low haze, high optical performance, and use inexpensive film materials at the same time, especially when maintaining reverse dispersion and low haze. There is dissatisfaction with improving optical performance while improving optical performance, and more detailed research is required

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cellulose acylate film, polarizing sheet and liquid crystal display device
  • Cellulose acylate film, polarizing sheet and liquid crystal display device
  • Cellulose acylate film, polarizing sheet and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～43 and comparative example 1～8

[0294] [Film production of cellulose acylate film]

[0295] Using the cellulose acylate dopes listed below, films were produced by solution casting and used in Examples and Comparative Examples.

[0296] In addition, in the following Table 2, unless otherwise specified, cellulose acetate was used as cellulose acylate. In addition, about various additives, description is the addition amount with respect to 100 mass parts of cellulose acylate. As the retardation agent A, the following triazine compound was used.

[0297] Delayed expression agent A

[0298]

[0299] (cellulose acylate glue A)

[0300]

[0301] In cellulose acylate dope A, 0.13 parts by mass of a matting agent (AEROSIL R972, manufactured by Japan Aerosil Co., Ltd., secondary average particle diameter of 1.0 μm or less) as fine particles is 0.13 parts by mass relative to 100 parts by mass of cellulose acylate amount to mix and stir the matting agent dispersion.

[0302] (solution casting in monolayer for...

Embodiment 101～122、 comparative example 101 and 102

[0305] (Solution casting in the form of co-casting)

[0306] In the same manner as the cellulose acylate dope A in Example 1, the dope for the inner layer (total acyl substitution degree: 2.43) and the surface layer were prepared using cellulose acylate having the degree of acyl substitution described in Table 3 below. Mucilages A and B (both total acyl substitution 2.81) were used. In addition, if figure 1 As shown, on the moving casting belt 85, the following three kinds of dopes are simultaneously cast from the casting die 89. Here, by adjusting the casting amount of each dope, the inner layer becomes the thickest. As a result, the film thickness of the stretched film is that the total film thickness becomes the thickness described in the following Table 3, and the surface layer A and the B layer respectively become 2.5 μm, multilayer co-casting was performed simultaneously in each of the Examples in the above-mentioned manner, thereby forming the cast film 70 . The film...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a cellulose acylate film which has the following advantages: flat chromatic dispersion, reciprocal dispersion, low mist degree, high optical performance, and capability for using low-cost film material. The cellulose acylate film is characterized in that: the cellulose acylate film comprises the cellulose acylate with a total acyl substitution degree of 2.00-2.70 and at least one polyester which comprises aromatic dicarboxylic acid residues and aliphatic diol residues. The ration of the aromatic dicarboxylic acid residues in the polyester relatively to the total dicarboxylic acid residues is more than 60mol%. Furthermore, two end of each polyester module are respectively one group selected from the following groups independently: -OH group, -O-C(=O)-R1 group, -C(=O)-O-R2 group, -O-R3 group and -COOH group, wherein R1-R3 respectively represent an aliphatic group independently.

Description

technical field [0001] The present invention relates to a cellulose acylate film, a polarizing plate and a liquid crystal display device. Background technique [0002] In silver halide photosensitive materials, retardation films, polarizers and image display devices, cellulose acylate, polyester, polycarbonate, cycloolefin polymer, vinyl polymer and polyimide are used as Representative polymer films. These polymers are widely used as films for optical applications because they can produce films more excellent in planarity and uniformity. For example, a cellulose acylate film having moderate moisture permeability can be directly bonded in-line to a polarizer composed of the most common polyvinyl alcohol (PVA) / iodine. Therefore, cellulose acylate, particularly cellulose acetate, is widely used as a protective film for a polarizing plate. [0003] When cellulose acylate film is used in optical applications such as retardation films, supports for retardation films, protective...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L1/10C08L67/02C08K5/12G02B5/30G02F1/1335
Inventor 渡边晋也渡野亮子
Owner FUJIFILM CORP