Pressure-sensitive adhesive optical film and image display

An optical film and adhesive technology, applied in optics, optical components, identification devices, etc., can solve problems such as unevenness and inability to eliminate window frames

Active Publication Date: 2008-06-25
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, if an antioxidant is added to the adhesive layer, the unevenness of the mirror frame can be eliminated, but the unevenness of the window frame cannot be eliminated.

Method used

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  • Pressure-sensitive adhesive optical film and image display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132]

[0133] As the matrix polymer, an acrylic polymer having a weight-average molecular weight of 1.65 million (as polymerized As an initiator, a solution (15.5% of solid content) of 0.3 parts of 2,2'-azobisisobutyronitrile) was used per 100 parts of monomers. To 100 parts of the solid content of the above-mentioned acrylic polymer solution, 0.3 parts of dibenzoyl peroxide (manufactured by NOF Co., Ltd., Nippa BMT40SV), 0.02 parts of trimethylolpropane di Toluene diisocyanate (manufactured by Mitsui Takeda Chemical Co., Ltd., Takenet D110N), 0.2 parts of acetoacetyl group-containing silane coupling agent (manufactured by Soken Chemical Co., Ltd., A-100), and a binder solution (solid content 12%).

[0134]

[0135] Using the reverse roll coating method, the obtained adhesive solution was applied on a release sheet made of a polyester film (thickness: 38 μm) that had been subjected to mold release treatment so that the thickness of the adhesive layer after drying was 20...

Embodiment 2～7

[0145] In Example 1, except having changed the compounding quantity of the phenolic antioxidant as shown in Table 1 when preparing a tackifier, it carried out similarly to Example 1, and produced the adhesive type optical film.

Embodiment 8

[0147] In Example 1, when preparing the tackifier, as the antioxidant, a phenolic antioxidant (manufactured by Chiba Special Chemicals Co., Ltd., Ilganox 1010) and a phosphorus-based antioxidant (manufactured by Chiba Special Chemicals Co., Ltd. , イルガノツックス B225), with the ratio of phenolic antioxidant: phosphorus antioxidant = 1:1 (weight ratio), their total relative to the solid content of the solution 100 parts, add 1 part, in addition, It carried out similarly to Example 1, and produced the adhesive type optical film.

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Abstract

A pressure-sensitive adhesive optical film of the present invention comprises: an optical film comprising a transparent base film and an optical compensation liquid crystal layer provided on one side of the transparent base film; a pressure-sensitive adhesive layer provided on the optical compensation liquid crystal layer; and an undercoat layer that is interposed between the optical compensation liquid crystal layer and the pressure-sensitive adhesive layer and contains a polymer and an antioxidant. The pressure-sensitive adhesive optical film can suppress window frame unevenness when a backlight is turned on.

Description

technical field [0001] The invention relates to an adhesive optical film. Further, it also relates to image display devices such as liquid crystal display devices, organic EL display devices, CRTs, and PDPs using the pressure-sensitive adhesive optical film. Background technique [0002] Liquid crystal display devices are rapidly spreading in the market for clocks, mobile phones, PDAs, notebook computers, monitors for personal computers, DVD players, TVs, and the like. A liquid crystal display device visualizes a change in a polarization state due to switching of liquid crystals, and a polarizer can be used according to the display principle. In particular, applications such as TVs require higher and higher brightness and contrast displays. As far as polarizers are concerned, polarizers that are brighter (high transmittance) and higher contrast (high polarization) are being developed and introduced. [0003] At present, the mainstream method of general liquid crystal displ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335C09J133/00C09J7/02G09F9/35G09F9/00
CPCG02B6/0061G02F1/1335G02F1/13363G02F2202/28G02F2203/60
Inventor 大平佳世外山雄祐佐竹正之宫武稔
Owner NITTO DENKO CORP
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