Polarizing plate and liquid crystal display device

A technology of polarizing plates and polarizing plates, which is applied in the field of polarizing plates and liquid crystal display devices, can solve the problem of uneven display of triacetyl cellulose retardation panels, and achieve the effect of good appearance and suppression of scorching

Active Publication Date: 2016-08-03
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, triacetyl cellulose or the like generally used as a transparent protective film has a problem that

Method used

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  • Polarizing plate and liquid crystal display device
  • Polarizing plate and liquid crystal display device
  • Polarizing plate and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0173]

[0174] (production of polarizing plate)

[0175] The above-mentioned adhesive agent A was applied to one side of the above-mentioned transparent protective film A so that the thickness of the adhesive layer after drying became 80 nm, and it was set aside. The above-mentioned adhesive agent A was applied to one side of the above-mentioned transparent protective film G so that the thickness of the adhesive layer after drying became 80 nm, and it was set aside. In addition, the application of the adhesive agent was performed under the temperature condition of 23° C. after 30 minutes from the above-mentioned preparation. Next, the above-mentioned transparent protective films A and G with adhesive were bonded to both surfaces of the polarizing plate with a roll machine at a temperature of 23° C., and then dried at 55° C. for 6 minutes to produce a polarizing plate.

Example

[0176]

[0177] In preparation of the polarizing plate of Example 1, except having changed the kind of transparent protective film and the kind of adhesive agent as shown in Table 1, it carried out similarly to Example 1, and produced the polarizing plate.

[0178] In addition, the coating layer on the surface of the polarizing plate of Examples 4, 5 and Comparative Example 2 was formed by the following procedure. Prepare 50 parts by weight of ultraviolet-curable urethane acrylate resin (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "UV1700B", solid content 100%), and a multifunctional acrylate mainly composed of pentaerythritol triacrylate (Osaka organic Kagaku Kogyo Co., Ltd. product, brand name "VISCOAT #300", solid content 100%) 50 parts by weight. With respect to 100 parts by weight of the resin solid content of the above resin, copolymerized particles of acrylic acid and styrene (manufactured by Sekisui Chemical Industry Co., Ltd., trade name...

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Abstract

The present invention provides a polarizing plate which can inhibit uneven display and yellowing even when the polarizing plate is applied to a liquid crystal panel and prevent charring during the film forming, and a liquid crystal display device. The polarizing plate of the invention is provided with transparent protective films on both surfaces of polyvinyl alcohol polarizing plate and spacing an adhesive agent layer. The first transparent protective film of one surface contains a (methyl) acrylic resin, and an ultraviolet light absorber. The (methyl) acrylic resin has an unsaturated carboxylic alkyl ester unit and a glutarimide unit represented by a general formula (1). The midization rate is 2.5-5.%, the acid value is 0.10-0.50mmol/g, and an acrylate unit is not more than 1 wt%. The second transparent protective film of the other surface is a phase different plate containing cellulose esters and satisfying a relation of nx>ny>nz.

Description

technical field [0001] The invention relates to a polarizing plate and a liquid crystal display device. Background technique [0002] A liquid crystal display device visualizes a polarization state by switching liquid crystals. Based on the display principle, a polarizing plate is used in which a transparent protective film is bonded to both surfaces of a polarizing plate via an adhesive layer. As a polarizer, for example, an iodine-based polarizer having a structure obtained by absorbing iodine to polyvinyl alcohol and stretching it is widely used as the most commonly used polarizer because it has a high transmittance and a high degree of polarization. As the transparent protective film, triacetyl cellulose or the like having high moisture permeability is used. [0003] Image display devices such as liquid crystal display devices to which the above polarizing plates are applied are used in various environments. Therefore, it is desired to impart durability such as heat re...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02F1/1335
CPCG02B5/305G02F1/133528
Inventor 村山俊介中田美惠木村真规子山下智弘
Owner NITTO DENKO CORP
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