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Polarizing film with pressure-sensitive adhesive layer, and image display device

A technology for image display devices and adhesive layers, which is applied to film/sheet-shaped adhesives, adhesives, identification devices, etc., can solve problems such as deterioration and inability to block ultraviolet rays, and achieve process removal and high ultraviolet blocking functions , Inhibit the effect of curl

Active Publication Date: 2018-08-03
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 above-mentioned protective film is reduced, the ultraviolet rays incident on the image display device cannot be sufficiently blocked, and there is a problem that not only the polarizer but also various components including liquid crystal panels and organic EL elements used in the image display device All kinds of optical components are accelerated by ultraviolet rays

Method used

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  • Polarizing film with pressure-sensitive adhesive layer, and image display device
  • Polarizing film with pressure-sensitive adhesive layer, and image display device
  • Polarizing film with pressure-sensitive adhesive layer, and image display device

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0181] Production example 1 (production of acrylic pressure-sensitive adhesive composition (a-1))

[0182] Blended 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) 0.035 parts by weight of 1-hydroxycyclohexyl phenyl ketone (trade name: IRGACURE 184, having an absorption band at a wavelength of 200 nm to 370 nm, manufactured by BASF Corporation) as a photopolymerization initiator, 2,2-dimethoxy-1 , 2-diphenylethan-1-one (trade name: IRGACURE 651, having an absorption band at a wavelength of 200nm to 380nm, manufactured by BASF Corporation) 0.035 parts by weight, and then irradiated with ultraviolet rays until the viscosity (measurement conditions: BH viscometer No. .5 rotor, 10 rpm, measurement temperature 30° C.) was about 20 Pa·s to obtain a prepolymer composition (polymerization rate: 8%) in which a part of the above-mentioned monomer...

manufacture example 2

[0183] Production example 2 (production of acrylic pressure-sensitive adhesive composition (a-2))

[0184] 72 parts by weight of 2-ethylhexyl acrylate (2EHA), 1 part by weight of methyl methacrylate (MMA), 12 parts by weight of N-vinylpyrrolidone (NVP), 15 parts by weight of hydroxyethyl acrylate (HEA) 0.2 parts by weight of azobisisobutyronitrile (AIBN) and 233 parts by weight of ethyl acetate were put into the monomer mixture constituted as a polymerization initiator, and then reacted at 60° C. for 7 hours under a nitrogen atmosphere, thus obtaining A partial polymer obtained by polymerizing a part of the above-mentioned monomer components. Next, 0.3 parts by weight of a silane coupling agent (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.), and an isocyanate crosslinking agent (trade name: TAKENATE D110N, manufactured by Mitsui Co., Ltd.) as a crosslinking agent were added to this part of the polymer. Chemical Co., Ltd.) 0.21 parts by weight to obtain an...

manufacture example 3

[0185] Production example 3 (manufacture of image display portion side adhesive layer (B-1))

[0186] 95 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 parts by weight of azobisisobutyronitrile as a polymerization initiator, and ethyl acetate After adding 233 parts by weight of ester, nitrogen gas was blown in, and nitrogen substitution 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.

[0187] 0.8 wt. of trimethylolpropane toluene diisocyanate (trade name: CORONATE L, manufactured by Nippon Polyurethane Industry Co., Ltd.) 0.1 part by weight of a silane coupling agent (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.), an adhesive composition (solution) was prepared.

[0188] The resulting adhesive composition solution was applied to a separator (polyethylene terephthalate film with a...

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Abstract

A polarizing film with a pressure-sensitive adhesive layer according to the present invention is to be used at a portion located more toward the visible side than an image display unit in an image display device. The polarizing film with a pressure-sensitive adhesive layer includes a polarizing film and a pressure-sensitive adhesive layer on both sides of the polarizing film. The polarizing film has a polarizer and a transparent protective film on both sides of the polarizer. The transparent protective film located on the visible side of the polarizer has a transmittance of less than 6% at thewavelength of 380 nm, and the pressure-sensitive adhesive layer on the visible side of the polarizing film has an ultraviolet absorption function. The present invention can solve the problem regarding a low process yield, and can provide a polarizing film with a pressure-sensitive adhesive layer capable of providing a sufficient ultraviolet protection function and inhibiting the occurrence of curling, even when the polarizing film is of a thin type.

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 polarizing films are usually attached. Furthermore, in display panels such as liquid crystal panels and organic EL panels, in addition to polarizing films, various optical elements have been used in order to improve the display quality of the display. [0003] Polarizi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30C09J7/20C09J133/00G02F1/1335G09F9/00G09F9/30H01L27/32H01L51/50H05B33/02
CPCG02B5/305G09F9/30G02F1/133528C09J133/00C09J7/20H10K59/00H10K50/00G02F1/1335G02B5/30
Inventor 山本真也形见普史柳沼宽教保井淳
Owner NITTO DENKO CORP
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