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Polarizing plate and liquid crystal display including same

A polarizer and polarizer technology, applied in the field of liquid crystal display devices, can solve the problems of insufficient adhesive strength, no alternatives, poor appearance of polarizers, etc., and achieve the effects of excellent durability and excellent adhesion

Inactive Publication Date: 2015-10-14
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When bonding a protective film made of a resin with low moisture permeability to a polyvinyl alcohol-based polarizer, the polyvinyl alcohol-based polarizer that has been generally used as an adhesive in bonding a polyvinyl alcohol-based polarizer to triacetyl cellulose The aqueous solution of the resin has the problem that the adhesive strength is insufficient, or the appearance of the resulting polarizing plate is poor
[0007] Patent Document 1 discloses a primer composition, an optical film comprising the primer composition, and a polarizer comprising the optical film, but it does not propose an alternative to the above-mentioned problems

Method used

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  • Polarizing plate and liquid crystal display including same
  • Polarizing plate and liquid crystal display including same
  • Polarizing plate and liquid crystal display including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] (1) Preparation of photocurable adhesive composition

[0158] As a cationic polymerizable compound, 65 parts by weight of Daicel's CEL-2021P and 32 parts by weight of KUKDO Chemical's YDF-8170, 2.0 parts by weight of CPI-110A as a photopolymerization initiator, and 1.0 parts by weight as a photosensitizer The UVS-1331 of Kawasaki Chemical Industry Co., Ltd. was mixed in parts by weight to prepare a photocurable adhesive composition.

[0159] (2) Manufacture of polarizer

[0160] A triacetyl cellulose film was bonded to the upper surface of the polyvinyl alcohol-based polarizer.

[0161] Thereafter, a laminate (zeonor film: eZB12, manufactured by ZEON Corporation) in which a primer layer was formed on a cycloolefin film was bonded to a polarizer using the photocurable adhesive composition described above.

Embodiment 2

[0163] In addition to using 98% by weight of trimethylolpropane triacrylate (Aronix M-309, Toagosei) as a cationic polymerizable compound, and 1.0% by weight of UVACURE1590 (DAICEL-CYTEC Company) as a photopolymerization initiator, A polarizing plate was produced in the same manner as in Example 1, except that an adhesive composition of 1.0% by weight of IRGACURE 184 (CIBA Corporation) was used as a photosensitizer instead of the photocurable adhesive.

experiment example

[0173] (1) Adhesion evaluation

[0174] The results of evaluating the adhesiveness between the polarizer and the protective film in the polarizing plates produced in Examples and Comparative Examples are shown in Table 1 below according to the following criteria.

[0175] ◯: The film did not spread due to cracks, and the film could be broken without interfacial peeling.

[0176] Δ: The film was not broken by cracks, but peeled off at the interface.

[0177] X: When separation occurs with cracks, separation can be easily performed, and protrusions appear between the protective film and the polarizer.

[0178] (2) Evaluation of heat and humidity resistance, heat resistance, and thermal shock resistance

[0179] The polarizing plates produced in Examples and Comparative Examples were placed in a heat-resistant oven at a temperature of 60° C. and a relative humidity of 90% and a heat-resistant oven at a temperature of 80° C., respectively. After leaving for 3 days, the appearanc...

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Abstract

The present invention relates to a polarizing plate and a liquid crystal display including the same and, more specifically, to a polarizing plate and a liquid crystal display, the polarizing plate includes a protection film having a primer layer on one side thereof and a polarizer attached through a photocurable adhesive layer formed on the primer layer, and thus has excellent adhesion between the polarizer and the protection film, high durability, and does not require hydrophilic surface treatment for attaching the polarizer to the protection film.

Description

technical field [0001] The invention relates to a polarizer and a liquid crystal display device comprising the polarizer. Background technique [0002] A polarizing plate is useful as one of optical components constituting a liquid crystal display device. A polarizer usually has a structure in which protective films are laminated on both surfaces of a polarizer, and is inserted into a liquid crystal display device. A known polarizer is provided with a protective film on only one side of the polarizer, but in most cases, it is not a simple protective film that is joined to the other side, but will have another function, such as an optical function. The layer doubles as a protective film and is bonded to the other surface. In addition, as a method of producing a polarizer, a method in which a uniaxially stretched polyvinyl alcohol-based resin film dyed with a dichroic dye is subjected to boric acid treatment, washed with water, and then dried is widely used. [0003] Usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02F1/1335G02B5/30G03C1/00G02F1/133528C09K2323/03C09K2323/031C09K2323/05G03F7/0045G03F7/038Y10T428/265Y10T428/31515Y10T428/31551Y10T428/31591B32B7/12B32B27/08B32B2457/202G02B5/3033G02B1/14
Inventor 权泰昌金容演赵敏成
Owner DONGWOO FINE CHEM CO LTD