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Polarizing film, polarizing film with pressure-sensitive adhesive layer, process for producing polarizing film, and image display device

An adhesive layer and polarizing film technology, which is applied to the polarizing film with adhesive layer, image display device, and the manufacturing field of the above-mentioned polarizing film, can solve the problem of insufficient thinning of the polarizing film, etc., and achieve high optical reliability. , Suppressing the degradation of optical properties, suppressing the effect of nanoslits

Active Publication Date: 2018-11-09
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polarizing films with pressure-sensitive adhesive layers described in Patent Documents 4 and 5 are insufficient in thickness reduction.

Method used

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  • Polarizing film, polarizing film with pressure-sensitive adhesive layer, process for producing polarizing film, and image display device
  • Polarizing film, polarizing film with pressure-sensitive adhesive layer, process for producing polarizing film, and image display device
  • Polarizing film, polarizing film with pressure-sensitive adhesive layer, process for producing polarizing film, and image display device

Examples

Experimental program
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Effect test

manufacture example 1

[0211] Production example 1 (production of polarizer A0)

[0212] For substrates of amorphous isophthalic acid-copolyethylene terephthalate (IPA-co-PET) film (thickness: 100 μm) with a water absorption rate of 0.75% and a glass transition temperature (Tg) of 75°C Corona treatment was performed on one side, and the corona treatment surface was coated with polyvinyl alcohol (polymerization degree: 4200, saponification degree: 99.2 mol%) and acetoacetyl modified PVA ( Degree of polymerization: 1200, degree of acetoacetyl group modification: 4.6%, degree of saponification: 99.0 mol% or more, trade name: Gohsefimer Z200, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) and dried to form a PVA with a thickness of 11 μm Resin layer, a laminated body was produced.

[0213] The obtained laminate was stretched 2.0 times in the longitudinal direction (longitudinal direction) in an oven at 120° C. between rollers having different circumferential speeds, and free-end uniaxial...

manufacture example 2～8

[0220] Production Examples 2-8 (Production of Polarizers A1-A7)

[0221] Except having changed the manufacturing conditions as shown in Table 1, it carried out similarly to the manufacture example 1, and produced the polarizers A1-A7. Table 1 shows the thicknesses, optical properties (single transmittance, degree of polarization), and boric acid content of polarizers A1 to A7.

[0222]

manufacture example 9

[0224] (Preparation of Monomer Emulsion)

[0225] The monomer components listed in Table 2 were added to the container and mixed. Next, 12 parts of AQUALON HS-10 (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) and 127 parts of ion-exchanged water were added as a reactive surfactant to 200 parts of the prepared monomer components. manufactured by Kagaku Kogyo Co., Ltd.) was stirred at 6000 (rpm) for 5 minutes to perform forced emulsification to prepare a monomer emulsion (A-1).

[0226] In another container, 12 parts of AQUALON HS-10 (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) and 382 parts of ion-exchanged water were added as a reactive surfactant to 600 parts of the monomer component prepared in the above ratio, and used It stirred at 6000 (rpm) for 5 minutes with a mass mixer (manufactured by Tokukuki Kagaku Kogyo Co., Ltd.), and forced emulsification was carried out to prepare a monomer emulsion (A-2).

[0227](Preparation of transparent resin layer ...

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Abstract

The present invention is a polarizing film which comprises a polarizer having a thickness of 10 microns or less and a transparent resin layer disposed on at least one surface of the polarizer, characterized in that the polarizer includes a poly(vinyl alcohol) resin and has been configured so that optical properties represented by both the transmittance T of itself and the degree of polarization Psatisfy the relationship P>-(100.929T-42.4-1)*100 (where T<42.3) or P>=99.9 (where T>=42.3), that the transparent resin layer is a layer formed from a transparent-resin-layer-forming material comprising an aqueous resin emulsion and has a hardness of 0.01 GPa or greater. In cases when the polarizing film of the present invention is a polarizing film employing a thin polarizer, the occurrence of defects, e.g., nanoslits, can be inhibited and the optical properties are inhibited from decreasing in a high-temperature high-humidity test. Thus, the polarizing film has high optical reliability.

Description

technical field [0001] The present invention relates to a polarizing film provided with a transparent resin layer on at least one surface of a polarizer, and a polarizing film with an adhesive layer comprising the polarizing film and an adhesive layer. The above-mentioned polarizing film and the polarizing film with an adhesive layer can form image display devices such as a liquid crystal display device (LCD) or an organic EL display device alone, or a laminated optical film with the above-mentioned polarizing film and a polarizing film with an adhesive layer laminated. In the form of a film, an image display device such as a liquid crystal display device (LCD) or an organic EL display device is formed. Moreover, this invention relates to the manufacturing method of the said polarizing film, and the image display apparatus using the said polarizing film and / or the polarizing film with an adhesive layer. Background technique [0002] For liquid crystal display devices, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B27/00B32B27/30G02F1/1335G09F9/00H01L51/50H05B33/02
CPCB32B27/00B32B27/30G09F9/00H05B33/02G02B1/14G02B5/3033G02F1/133528G02F1/13363G02F2202/28H10K59/00B32B7/12B32B27/08B32B27/18B32B27/306B32B27/36G02B5/30G02F1/1335B32B2457/20B32B2255/26B32B2255/10B32B2307/42
Inventor 三田聪司上野友德徐菁璠岸敦史
Owner NITTO DENKO CORP
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