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Method for producing coating sheet, optical functional layer, optical component and image displaying apparatus

A technology of optical functional layers and sheets, applied in optical elements, coatings, optics, etc., can solve the problems of difficult to form coatings and difficult coatings, and achieve the effect of excellent performance and excellent optical elements

Inactive Publication Date: 2006-12-20
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to form a coating with a uniform film thickness
In particular, it is difficult to form a coating with a uniform film thickness on a large-area base material film

Method used

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  • Method for producing coating sheet, optical functional layer, optical component and image displaying apparatus
  • Method for producing coating sheet, optical functional layer, optical component and image displaying apparatus
  • Method for producing coating sheet, optical functional layer, optical component and image displaying apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2 and comparative Embodiment 1-2

[0099] (preparation of coating liquid)

[0100] [Formula 1]

[0101]

[0102] [Formula 2]

[0103]

[0104] The liquid crystal monomer (A) represented by the above formula 1, the chiral reagent (B) represented by the above formula 2, and Irgacure 907 (produced by Ciba Specialty Chemicals) as the photopolymerization initiator (C) were mixed together to obtain a solid content weight ratio It is a composition of (A):(B):(C)=90:10:5. The composition was dissolved in various solvents shown in Table 1, and the prepared coating liquid was adjusted so that its solid content was 30% by weight. Table 1 shows the viscosity and surface tension at 25°C of the obtained coating liquid.

[0105] drying conditions

solvent

viscosity

[mPa.sec]

Surface Tension

[mN / m]

initial drying process

first drying process

second drying process

temperature

time

temperature

time

temperature

time

Example 1

...

Embodiment 3

[0109] An easy-adhesive PET film (A4100: manufactured by Toyobo Co., Ltd.) having a thickness of 50 µm was used as the transparent substrate. A coating liquid was applied on the film with a gravure coater to form a coating film having an average thickness of 5 μm after drying. The coating liquid was an acrylic UV-curable resin diluted with toluene (XRX564-2NL: Asahi Denka Co. , Ltd) obtained with a solid content of 30%. The drying conditions are shown in Table 1.

Embodiment 4

[0111] A TAC (triacetylcellulose) film (manufactured by Fiji Photo Film) having a thickness of 80 µm was used as the transparent substrate. A coating liquid was applied on the film with a gravure coater to form a coating film with an average thickness of 4 μm after drying. The coating liquid was diluted with MEK acrylic UV curable resin (Z7405 (mixed with MEK and xylene) ): produced by JSR Corporation), the solid content of which is 30%. The drying conditions are shown in Table 1.

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PUM

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Abstract

A method for manufacturing a coated sheet that may form a coated layer having a uniform film thickness by a coating liquid even when a substrate has a large area is provided. A method for manufacturing a coated sheet to form a coated layer by a process including a process (1) for coating a coating liquid including a resin material and a solvent on a substrate, and a drying process (2) for drying a coated liquid, wherein a value L obtained in drying process (2) might satisfy a following relationship. (where: T: total period of drying process [sec]; sigma: surface tension of coated liquid [mN / m]; h: thickness of coated liquid [m]; and eta: viscosity of coated liquid [mPa.sec])

Description

technical field [0001] The present invention relates to a method of producing coated sheets. For example, the method of the present invention is useful in forming an optical functional layer. In particular, the invention relates to an optical element employing an associated optically functional layer. The optical element is suitable for various image display devices such as liquid crystal displays (LCDs), organic electroluminescent display devices, PDPs, and CRTs. Background technique [0002] In general, various coated sheets are obtained by forming a coating by a given method such as coating, drying a coating liquid, etc. on the surface of an already produced base material film. As a coating method for the above-mentioned coating liquid, various methods such as a slot jet method, a reverse gravure coating method and a microgravure method can be employed. [0003] As the coated sheet, for example, various optical films having an optical function layer can be mentioned. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02F1/1335B05D3/02B05D5/00F26B13/10G02B1/10G02B1/14G09F9/00
CPCF26B13/10H01J2211/44
Inventor 近藤诚司土本一喜增田友昭
Owner NITTO DENKO CORP