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Cellulose acetate film with regulated retardation and thickness

一种乙酸纤维素、薄膜的技术，应用在乙酸纤维素薄膜领域，能够解决光泄漏等问题，达到防止光泄漏、防止开裂的效果

Inactive Publication Date: 2004-12-15
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that the optical compensation film of the present invention tends to generate a phase difference due to deformation such as heat, so that frame-like light leakage occurs during black display of a liquid crystal display due to the phase difference, resulting in a problem of durability.

Method used

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  • Cellulose acetate film with regulated retardation and thickness
  • Cellulose acetate film with regulated retardation and thickness
  • Cellulose acetate film with regulated retardation and thickness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0305] The following composition was put into a mixing tank, and stirred while heating to dissolve each component, and a cellulose acetate solution was prepared.

[0306] Cellulose acetate solution composition

[0307] 100 parts by weight of cellulose acetate with an acetylation degree of 60.9%

[0308] Triphenyl phosphate (plasticizer) 7.8 parts by weight

[0309] 3.9 parts by weight of biphenyl diphenyl phosphate (plasticizer)

[0310] Dichloromethane (first solvent) 300 parts by weight

[0311] Methanol (the second solvent) 54 parts by weight

[0312] 1-butanol (the third solvent) 11 parts by weight

[0313] In another mixing tank, 16 parts by weight of the following retardation improving agent, 80 parts by weight of methylene chloride, and 20 parts by weight of methanol were added, and stirred while heating to prepare a retardation improving agent solution.

[0314] 21 parts by weight of the retardation enhancer solution was mixed with 479 parts by weight of the cellu...

Embodiment 2

[0322] The following composition was put into a mixing tank, and stirred while heating to dissolve each component, and a cellulose acetate solution was prepared.

[0323] Cellulose acetate solution composition

[0324] 100 parts by weight of cellulose acetate with an acetylation degree of 60.9%

[0325] Triphenyl phosphate (plasticizer) 7.8 parts by weight

[0326] 3.9 parts by weight of biphenyl diphenyl phosphate (plasticizer)

[0327] Dichloromethane (first solvent) 300 parts by weight

[0328] Methanol (the second solvent) 54 parts by weight

[0329] 1-butanol (the third solvent) 11 parts by weight

[0330] In another mixing tank, 16 parts by weight of the retardation improving agent used in Example 1, 80 parts by weight of methylene chloride and 20 parts by weight of methanol were added, and stirred while heating to prepare a retardation improving agent solution.

[0331] 14 parts by weight of the retardation enhancer solution was mixed with 486 parts by weight of th...

Embodiment 3

[0347] Iodine is adsorbed on the stretched polyvinyl alcohol film to prepare a polarizing film, and the cellulose acetate film (CAF-01) obtained in Example 1 is attached to the polarizing film using a polyvinyl alcohol-based adhesive. on one side surface.

[0348] A commercially available cellulose acetate film (FUJITACTD80UF, manufactured by Fujifilm Co., Ltd.) was saponified, and attached to the other surface of the polarizing film using a polyvinyl alcohol-based adhesive. Thus, a polarizing plate was produced.

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Abstract

A cellulose acetate film which comprises a cellulose acetate having a degree of acetylation of 59.0 to 61.5%. The cellulose acetate film has been regulated so as to have an Re retardation value of 0 to 20 nm. It has been regulated so as to have an Rth retardation value of 30 to 70 nm. It has been regulated so as to have a thickness of 10 to 70 mu m.

Description

technical field [0001] The present invention relates to a cellulose acetate film having controlled retardation and thickness, and a polarizing plate and a liquid crystal display device using the cellulose acetate film. Background technique [0002] A liquid crystal display device is composed of a polarizer and a liquid crystal cell. [0003] For the current mainstream twisted nematic TFT liquid crystal display device, as described in JP-A-8-502206, an optical compensation film is inserted between the polarizer and the liquid crystal unit to realize a liquid crystal display device with high display quality. However, when this method is adopted, there are problems such as thickening of the liquid crystal display device itself. [0004] In JP-A-1-68940, it is described that by using an elliptical polarizing plate with an optical compensation film (retardation film) on one surface of the polarizing film and a protective film on the other surface, the liquid crystal will not be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/13363
CPCG02F1/133634G02B5/3083G02F1/13363
Inventor 伊藤洋士
Owner FUJIFILM CORP
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