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Polarizing plate and optical display device comprising same

A polarizing plate and polarizing film technology, applied in the field of polarizing plates, can solve problems such as the degradation of heat resistance and heat resistance of polarizing plates, and achieve excellent adhesion

Active Publication Date: 2019-04-16
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, when such an optical compensation layer is a liquid crystal film or a liquid crystal coating, the optical compensation layer may undergo relatively large thermal deformation, thereby causing deterioration of the heat and humidity resistance and / or heat resistance of the polarizing plate.

Method used

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  • Polarizing plate and optical display device comprising same
  • Polarizing plate and optical display device comprising same
  • Polarizing plate and optical display device comprising same

Examples

Experimental program
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Effect test

experiment example

[0111] Next, the present invention will be explained in more detail with reference to some examples. It should be understood that these examples are provided for illustrative purposes only and should not be construed as limiting the invention in any way.

[0112] The details of the components used in the following examples and comparative examples are as follows:

[0113] (A) Adhesive resin

[0114] (A1) Adhesive resin: a (meth)acrylic copolymer comprising 80% by weight of butyl acrylate and 20% by weight of 2-hydroxyethyl acrylate, its weight average molecular weight: 1,400,000 g / mol, glass before curing Transformation temperature: -30°C

[0115] (A2) Adhesive resin: 1335B (Sanwa Paint Co., Ltd., glass transition temperature before curing: 50°C)

[0116] (B) curing agent

[0117] (B1) Curing agent: toluene diisocyanate (toluene diisocyanate)-based curing agent Coronate L (Japan Polyurethane Industry Co., Ltd., does not contain allophanate groups)

[0118] (B2) Curing age...

preparation example 1

[0124] 100 parts by weight of (A1) adhesive resin, 0.4 parts by weight of (B1) curing agent, 0.1 parts by weight of (C1) silane coupling agent and 0.4 parts by weight of (D1) ultraviolet absorber were mixed to prepare an adhesive Agent layer composition.

preparation example 2 to preparation example 4

[0126] The adhesive layer composition was prepared in the same manner as in Preparation Example 1, except that the types and amounts of the adhesive resin, curing agent, silane coupling agent, and ultraviolet absorber were changed as listed in Table 1 (unit: parts by weight).

[0127] Adhesive layers were prepared using each of the adhesive layer compositions prepared in Preparation Example 1 to Preparation Example 4, and the tensile modulus of the adhesive layer was evaluated. The tensile modulus of the adhesive layer was measured by tensile stress-strain test according to ASTM D882. Specifically, the adhesive layer composition was coated on the release film in a predetermined range, then dried at 90° C. for 30 minutes, and then the release film was removed, thereby obtaining an adhesive layer with a thickness of 35 μm . The adhesive layer was cut into a size of length×width (5 mm×200 mm), whereby a sample was prepared. Both ends of the sample were fixed to clamps of a meas...

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Abstract

Provided are a polarizing plate and an optical display device comprising the same, wherein the polarizing plate has a polarizing film, a first adhesive layer, a first optical compensation layer, a second adhesive layer, and a second optical compensation layer laminated successively, and elastic modulus measured by a micro-indenter at 25 DEG C on the surface of the second optical compensation layerwith regard to the polarizing plate is about 100MPa to about 1000MPa.

Description

technical field [0001] The invention relates to a polarizing plate and an optical display comprising the polarizing plate. Background technique [0002] The purpose of providing a polarizing plate to an optical display is to prevent reflection of external light or to polarize light from a light source. Here, the optical display may be a liquid crystal display, an organic light emitting display or a flexible organic light emitting display. [0003] The polarizing plate includes a polarizer, a protective film such as an optical compensation film, and an adhesive layer for attaching the polarizer to the protective film. The adhesive layer can also be used to attach the polarizer to the panel. In recent years, efforts have been made to study an adhesive layer capable of imparting a specific function to a polarizing plate and performing a basic function of providing adhesive strength. [0004] The organic light emitting display is a self-luminous display, and the organic light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14G02B1/04G02B5/22
CPCG02B1/04G02B1/14C09J175/04C08G18/6229C08G18/8022C08G18/7837G02B5/3016G02B5/3033H10K59/8791G02B5/223G02B5/22G02B5/30H10K59/50C09J175/14G02B5/003
Inventor 郑宇鎭李承俊李泰贤
Owner SAMSUNG SDI CO LTD
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