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Adhesive layer-equipped polarization film, and image display device

An image display device and adhesive layer technology, which is applied to polarizing elements, lighting devices, layered products, etc., can solve problems such as deterioration, accelerated polarizers, and inability to sufficiently block ultraviolet rays, so as to reduce processes and solve yield reduction. Effect

Pending Publication Date: 2019-02-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the thickness of the protective film becomes thin, the ultraviolet rays incident on the image display device cannot be sufficiently blocked, and there is a possibility that not only the deterioration of the polarizer caused by ultraviolet rays is accelerated, but also the liquid crystal panel, organic EL, etc. used in the image display device are accelerated. Deterioration of various optical components including elements due to ultraviolet rays

Method used

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  • Adhesive layer-equipped polarization film, and image display device
  • Adhesive layer-equipped polarization film, and image display device
  • Adhesive layer-equipped polarization film, and image display device

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0161] Production example 1 (production of acrylic pressure-sensitive adhesive composition (a-1))

[0162] Compounded in a monomer mixture consisting of 78 parts by weight of 2-ethylhexyl acrylate (2EHA), 18 parts by weight of N-vinyl-2-pyrrolidone (NVP) and 4 parts by weight of 2-hydroxyethyl acrylate (HEA) As a photopolymerization initiator, 0.035 parts by weight of 1-hydroxycyclohexyl phenyl ketone (trade name: Irgacure 184, which has an absorption band in the wavelength range of 200 nm to 370 nm, manufactured by BASF Corporation), 0.035 parts by weight of 2,2-dimethyl Oxygen-1,2-diphenylethan-1-one (trade name: Irgacure651, has an absorption band in the wavelength range of 200nm to 380nm, manufactured by BASF Corporation), and then irradiated with ultraviolet light until the viscosity (measurement condition: BH viscometer , No. 5 rotor, 10 rpm, measurement temperature 30° C.) was about 20 Pa·s, thereby obtaining a prepolymer composition (polymerization rate: 8%) obtained b...

manufacture example 2

[0163] Production example 2 (production of acrylic pressure-sensitive adhesive composition (a-2))

[0164]67 parts by weight of butyl acrylate (BA), 14 parts by weight of cyclohexyl acrylate (CHA), 27 parts by weight of 4-hydroxybutyl acrylate (4HBA), 0.05 parts by weight of 2,2-dimethyl Oxygen-1,2-diphenylethan-1-one (trade name: Irgacure 651, has an absorption band in the wavelength range of 200nm to 380nm, manufactured by BASF Japan Co., Ltd.) and 0.05 parts by weight of 1-hydroxycyclohexylphenyl Methanone (trade name: Irgacure 184, which has an absorption band in the wavelength range of 200nm to 370nm, manufactured by BASF Japan Co., Ltd.) was put into a four-neck flask, and partially photopolymerized by exposing it to ultraviolet rays under a nitrogen atmosphere to obtain A partial polymer (monomer syrup) with a polymerization rate of 10% was obtained. Next, 0.15 parts by weight of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPHA), and 0.3 parts b...

manufacture example 3

[0165] Production example 3 (manufacture of image display portion side adhesive layer (B-1))

[0166] Put 95 parts of butyl acrylate, 5 parts of acrylic acid, 0.2 parts of azobisisobutyronitrile as a polymerization initiator, and 233 parts of ethyl acetate into a separable flask equipped with a thermometer, a stirrer, a reflux condenser, and a nitrogen gas introduction tube. , and then nitrogen gas was introduced, and nitrogen replacement was performed for about 1 hour while stirring. Then, the flask was heated to 60° C. and reacted for 7 hours to obtain an acrylic polymer having a weight average molecular weight (Mw) of 1.1 million.

[0167] 0.8 parts by weight of trimethylolpropane toluene diisocyanate (trade name: Coronate L, manufactured by Nippon Polyurethane Industry Co., Ltd. ), 0.1 part of a silane coupling agent (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.), thereby preparing an adhesive composition (solution).

[0168] The resulting adhesive c...

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Abstract

One purpose of the present invention is to provide an adhesive layer-equipped polarization film which is capable of solving the problem of reduction in yield, and which is capable of imparting sufficient ultraviolet cut-out function, even if the polarization film is thin. Another purpose of the present invention is to provide an image display device which uses said adhesive layer-equipped polarization film. The adhesive layer-equipped polarization film is used further towards the viewing side than an image display unit in an image display device. The adhesive layer-equipped polarization film is characterized by being provided with a polarization film, and adhesive layers provided to both surfaces of the polarization film. The adhesive layer-equipped polarization film is further characterized in that: the polarization film is provided with a polarizer, and transparent protective films provided to both surfaces of the polarizer; the transmittance of the transparent protective film at theviewing side of the polarizer at a wavelength of 380 nm is at least 6%; and the adhesive layer at the viewing side of the polarization film has an ultraviolet absorption function.

Description

technical field [0001] The present invention relates to a polarizing film with an adhesive layer used in an image display device. Moreover, this invention relates to the image display apparatus using the said polarizing film with an adhesive layer. Examples of the image display device include a liquid crystal display device, an organic EL (electroluminescence) display device, a PDP (plasma display panel), electronic paper, and the like. Background technique [0002] For liquid crystal display devices, organic EL display devices, etc., due to their image forming methods, for example, in liquid crystal display devices, it is essential to arrange polarizing elements on both sides of the liquid crystal cell, and usually a polarizing film is attached. Also, in display panels such as liquid crystal panels and organic EL panels, various optical elements are used in addition to polarizing films to improve the display quality of the display. [0003] Polarizing films used in these ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335H01L51/50H05B33/02
CPCG02B5/305G02F1/133528C09J133/00C09J11/06H10K50/86C08K5/3492G02F1/1335G02B5/30H05B33/02
Inventor 山本真也形见普史保井淳
Owner NITTO DENKO CORP
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