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Method for manufacturing anisotropic dye film, anisotropic dye film manufactured by said manufacturing method, optical element including said anisotropic dye film, and liquid crystal element including said optical element

An anisotropy and manufacturing method technology, applied in the direction of optical elements, optics, polarizing elements, etc., can solve the problem of high cost, achieve excellent polarization performance, and suppress the effect of uneven film thickness or coating stripes

Active Publication Date: 2016-04-27
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, not only the production of polarizing film, but also adhesive and adhesion process technology are required, so the cost is usually high

Method used

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  • Method for manufacturing anisotropic dye film, anisotropic dye film manufactured by said manufacturing method, optical element including said anisotropic dye film, and liquid crystal element including said optical element
  • Method for manufacturing anisotropic dye film, anisotropic dye film manufactured by said manufacturing method, optical element including said anisotropic dye film, and liquid crystal element including said optical element
  • Method for manufacturing anisotropic dye film, anisotropic dye film manufactured by said manufacturing method, optical element including said anisotropic dye film, and liquid crystal element including said optical element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0215]

[0216]

[0217] In 81 parts of water, add 18 parts of the azo compound represented by the formula (I) and 1 part of the compound represented by the formula (II), stir and dissolve, filter, remove the insoluble components, and obtain the combination for forming an anisotropic pigment film Object 1. The viscosity of the composition 1 for anisotropic dye film formation was 16.0 cP.

[0218] 【Chemical 3】

[0219]

[0220] 【Chemical 4】

[0221]

[0222]

[0223] In 79 parts of water, add 20 parts of the azo compound represented by the formula (I) and 1 part of the compound represented by the formula (II), stir and dissolve, filter, remove the insoluble components, and obtain the combination for forming an anisotropic pigment film Object 2. The viscosity of the composition 2 for anisotropic dye film formation was 40.0 cP.

[0224]

[0225] In 74 parts of water, add 25 parts of azo compounds represented by formula (I) and 1 part of compounds represented by ...

Embodiment 1

[0229] The length A of the part parallel to the coating surface of the anisotropic pigment film in the front die lip is 0.5 mm, and the length B of the part parallel to the coating surface of the anisotropic pigment film in the rear die lip is 0.1 mm. A die head with a slit width of 50 μm was used to apply the anisotropic pigment film-forming composition 1 on the above-mentioned coated substrate so that the rubbing direction of the substrate was parallel to the coating direction, and the film thickness during coating was is 3 μm.

[0230] The upper limit of the coating speed for coating without defects on the entire substrate was found, and it was found that coating was possible at 15 mm / s, and an anisotropic dye film 1 with a film thickness of about 0.3 μm was obtained.

[0231] In addition, preparation was performed on coating conditions of 24-26 degreeC and 40%RH-60%RH. The obtained anisotropic dye film 1 does not generate uneven film thickness or coating streaks, and the ...

Embodiment 2～6

[0233] Anisotropic dye film 2 was obtained as in Example 1, except that the lengths of A and B, the film thickness at the time of coating, and the composition for forming an anisotropic dye film used were changed to the values ​​shown in Table 1. ~6.

[0234] Coating speed of the composition for anisotropic pigment film formation, film thickness of the obtained anisotropic pigment film, presence or absence of uneven film thickness and coating streaks, transmittance of the anisotropic pigment film, dichromatic Table 1 shows the measurement results of the ratio and degree of polarization.

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Abstract

The problem addressed by the present invention is providing a die having a lip with a specific shape so as to be able to obtain a uniformly applied film with minimal occurrences of variations in thickness and application streaking when applying a composition for anisotropic dye film formation. The problem above is addressed by a method for manufacturing an anisotropic dye film that includes a step for applying a composition for anisotropic dye film formation onto a substrate using a die coater. The method for manufacturing the anisotropic dye film is characterized by the die coater having a front lip positioned on the direction of travel side of the die coater and a rear lip positioned on the side opposite to the direction of travel, and both lips having respective lip lower edge surfaces facing the substrate. Letting A be the length for the lower edge surface of the front lip along the direction of travel and B be the length of the lower edge surface of the rear lip along the direction of travel, A>B. The viscosity of the composition for anisotropic dye film formation is 10 cP or greater.

Description

technical field [0001] The present invention relates to a manufacturing method of an anisotropic dye film using a stamper, an anisotropic dye film manufactured by the manufacturing method, an optical element including the anisotropic dye film, and a liquid crystal element including the optical element. Background technique [0002] In a liquid crystal display (LCD), a linear polarizing film and a circular polarizing film are used for controlling optical rotation and birefringence in display. In addition, circular polarizing films are used to prevent reflection of external light in light-emitting display devices such as organic EL displays and input / output devices such as touch panels. [0003] There are two methods for forming these polarizing films (hereinafter, sometimes referred to as "anisotropic pigment film"): a polymer film such as polyvinyl alcohol is impregnated with a dichroic substance (iodine or pigment) and A method of stretching (hereinafter, sometimes referre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/26B05C5/02G02B5/30
CPCB05D1/26G02B5/3083
Inventor 山内康嗣鸟越实森贤彰中尾武
Owner MITSUBISHI RAYON CO LTD
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