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Adhesive type optical film and image display

An optical film and adhesive technology, applied in optics, optical components, lighting devices, etc., can solve problems such as display defects, inability to adhere, and display quality degradation

Inactive Publication Date: 2005-06-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the adhesive optical film with peeled adhesive is pasted on the liquid crystal cell, the peeled part cannot be adhered tightly, and light will be reflected at this part, which will become a display defect.
In particular, due to the recent narrowing of the edge of the display, even defects generated at the above-mentioned ends can significantly degrade the display quality

Method used

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  • Adhesive type optical film and image display
  • Adhesive type optical film and image display
  • Adhesive type optical film and image display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] (production of optical film)

[0092] A polarizer was obtained by stretching an 80 μm thick polyvinyl alcohol film 5 times in an iodine aqueous solution at 40° C. and then drying it at 50° C. for 4 minutes. A triacetyl cellulose film was bonded to both sides of the polarizer using a polyvinyl alcohol type adhesive to obtain a polarizing plate.

[0093] (formation of adhesion-promoting layer)

[0094] As the polyurethane resin latex, Adeka Bontighter HUX290H (average particle size of the latex is about 42nm) manufactured by Asahi Denka Kogyo Co., Ltd. was used, and it was prepared with a mixed solvent of water: butyl cellosolve = 3:1 (volume ratio) so that the solid content was diluted. to a 5% solution. The solution was coated on the above polarizer using a wire rod #5, and the volatiles were allowed to evaporate. The thickness of the evaporated adhesion-promoting layer was observed by the TEM ultra-thin film slice method, and the result was 1000 nm, and it was confi...

Embodiment 2

[0100] (optical film)

[0101] A corona-treated film (contact angle with water: 71 degrees) was used for a retardation plate (100 μm) using a biaxially stretched norbornene-based resin (manufactured by JSR, Arton).

[0102] (formation of adhesion-promoting layer)

[0103] As the polyethyleneimine adduct of acrylic acid / styrene copolymer latex, POLYMENT SK1000 (the average particle diameter of the latex is about 100nm) of Nippon Shokubai Co., Ltd. was used, and it was mixed with water: isopropanol=1:3 ( volume ratio) mixed solvent to prepare a solution in which the solid content was diluted to 5%. The solution was coated on the above-mentioned retardation plate using a wire rod #5, and then the volatile substances were allowed to evaporate. The thickness of the evaporated adhesion-promoting layer was observed by the TEM ultra-thin film slice method, and the result was 800nm, and it was confirmed that there were 4-5 latex particles in the thickness direction.

[0104] (Produc...

Embodiment 3

[0107] (production of optical film)

[0108] A solution of polycarbonate (PC) flakes dissolved in methylene chloride was evenly cast on a smooth SUS plate, and dried in a solvent atmosphere to prevent condensation on the surface. After sufficient drying, the PC was peeled off from the SUS plate, and then dried in a hot air circulation oven to obtain a PC unstretched film (30 μm). This film was stretched 1.2 times while heating, and corona-treated to obtain a PC retardation film (contact angle with water: 73 degrees).

[0109] (formation of adhesion-promoting layer)

[0110] An adhesion-promoting layer was formed on the above-mentioned PC retardation plate in the same manner as in Example 2. The thickness of the evaporated adhesion-promoting layer was observed by the TEM ultra-thin film slice method, and the result was 800nm, and it was confirmed that there were 4-5 latex particles in the thickness direction.

[0111] (Production of adhesive optical film)

[0112] The relea...

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Abstract

The pressure-sensitive adhesive optical film of the present invention is a film in which an adhesive layer is laminated on at least one surface of the optical film by interposing an adhesion-promoting layer formed of a resin latex. The pressure-sensitive adhesive optical film of the present invention does not cause detachment of the adhesive even when it comes into contact with the end portion during handling in the use process, and is easy to handle.

Description

technical field [0001] The present invention relates to an adhesive optical film in which an adhesive layer is laminated on at least one surface of the optical film. The present invention also relates to image display devices such as liquid crystal display devices, organic EL display devices, and PDPs using the adhesive optical film. As said optical film, a polarizing plate, retardation film, an optical compensation film, a brightness improvement film, and the material which laminated|stacked these etc. are mentioned, for example. Background technique [0002] In liquid crystal displays, etc., it is essential to arrange polarizing elements on both sides of the liquid crystal cell due to the image forming method, but polarizing plates are usually pasted. In addition, in order to improve the display quality of the display, besides the polarizer, various optical elements can be used on the liquid crystal panel. For example, a phase difference plate for preventing coloration, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J5/02C09J201/08G02B5/30G02F1/1335H01L51/50H05B33/02
CPCG02B5/30G02B5/3033Y10T428/2852Y10T428/28Y10T428/2848
Inventor 佐竹正之小林茂生梅田道夫原田千秋贞赖直树赤松秀城小笠原晶子
Owner NITTO DENKO CORP
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