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Retardation film with pressure-sensitive adhesive layer and elliptical polarizer and liquid-crystal display both employing the same

A technology of retardation film and adhesive layer, applied in the direction of adhesive type, graft polymer adhesive, film/sheet adhesive, etc. The effect of improving adhesion

Inactive Publication Date: 2011-01-26
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, non-polar polyolefin-based resins often have insufficient adhesion to the adhesive layer, and therefore improvement is required.

Method used

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  • Retardation film with pressure-sensitive adhesive layer and elliptical polarizer and liquid-crystal display both employing the same
  • Retardation film with pressure-sensitive adhesive layer and elliptical polarizer and liquid-crystal display both employing the same
  • Retardation film with pressure-sensitive adhesive layer and elliptical polarizer and liquid-crystal display both employing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] (a) Lamination of retardation film and primer layer

[0138] To the side opposite to the side where the surface protection film of the retardation film made of polypropylene resin is laminated, the cumulative irradiation dose is 15.9kJ / m 2 Implement corona discharge treatment. Within 5 minutes after the corona discharge treatment, the above-mentioned primer coating composition was coated on the corona-treated surface using a wire rod (#6), and dried in an oven at 80° C. for 3 minutes, and the retardation film A primer layer with a thickness of 0.8 μm was formed on it. (b) Fabrication of elliptical polarizing plate

[0139] Prepare a polarizing plate [SRW062 manufactured by Sumitomo Chemical Co., Ltd.] with a protective film made of cellulose triacetate bonded on both sides of a polarizing film with iodine adsorbed and oriented in polyvinyl alcohol, and glue a urethane acrylate film on one side. A sheet-like adhesive [NS300MP sold by Lintec Co., Ltd.] was used to prod...

Embodiment 2

[0152] (a) Lamination of retardation film and primer layer

[0153] To the side opposite to the side where the surface protection film of the retardation film made of polypropylene resin is laminated, the cumulative irradiation dose is 15.9kJ / m 2 Implement corona discharge treatment. Within 5 minutes after the corona discharge treatment, use a wire rod (#14) to coat the above-mentioned primer 2 coating composition on the corona-treated surface, and dry it in an oven at 80° C. for 5 minutes. A primer layer with a thickness of 1.0 μm was formed on the poor film.

[0154] (b) Fabrication of elliptical polarizing plate

[0155] In the same manner as in Example 1, an elliptically polarizing plate was fabricated.

[0156] (c) Thickness measurement of elliptically polarized plate

[0157] Operate and measure in the same manner as in Example 1. The measurement results are shown in Table 1.

[0158] (d) Anchor force test

[0159] Operate and measure in the same manner as in Exam...

Embodiment 3

[0165] (a) Lamination of retardation film and primer layer

[0166] To the side opposite to the side where the surface protection film of the retardation film made of polypropylene resin is laminated, the cumulative irradiation dose is 15.9kJ / m 2 Implement corona discharge treatment. Within 5 minutes after the corona discharge treatment, the above-mentioned primer 3 coating composition was coated on the corona-treated surface using a wire rod (#3), dried in an oven at 80° C. for 3 minutes, and A primer layer with a thickness of 0.8 μm was formed on the retardation film.

[0167] (b) Fabrication of elliptical polarizing plate

[0168] In the same manner as in Example 1, an elliptically polarizing plate was fabricated.

[0169] (c) Thickness measurement of elliptically polarized plate

[0170] Operate and measure in the same manner as in Example 1. The measurement results are shown in Table 1.

[0171] (d) Anchor force test

[0172] Operate and measure in the same manner ...

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Abstract

A retardation film with a pressure-sensitive adhesive layer is provided which has improved adhesion between a retardation film (20) comprising a polypropylene resin and the pressure-sensitive adhesive layer (40). The adhesive-layer-coated retardation film is constituted of a retardation film (20) comprising a polypropylene resin, a primer layer (30), and a pressure-sensitive adhesive layer (40) which have been formed in this order. The primer layer (30) comprises a modified polyolefin resin which has been modified with an unsaturated polycarboxylic acid or a derivative of an unsaturated polycarboxylic acid and with (meth)acrylic acid or a derivative of (meth)acrylic acid and has a weight-average molecular weight of 15,000-150,000. The retardation film (20) is made of a propylene / ethylene copolymer containing up to 10 wt.% ethylene units. It is preferable that the retardation film (20) of the adhesive-layer-coated retardation film be a quarter-wave plate.

Description

technical field [0001] The present invention relates to a retardation film containing a polypropylene resin, and an elliptically polarizing plate using the retardation film, and particularly to an elliptical polarizing plate in which a specific primer layer is laminated on a retardation film containing a polypropylene resin. A retardation film with an adhesive layer, an elliptically polarizing plate using the same, and a liquid crystal display device. Background technique [0002] In recent years, liquid crystal display devices have shown characteristics such as low power consumption, low-voltage operation, light weight, and thin profile, and are rapidly spreading as information display devices such as mobile phones, portable information terminals, computer monitors, and televisions. With the development of liquid crystal technology, various modes of liquid crystal displays have been proposed, whereby the problems of liquid crystal displays such as response speed, contrast, ...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B27/32C08F8/46C08F10/00C08F265/00G02F1/1335G02F1/13363
CPCC09J2451/003C09J2423/006G02B5/3083C09J151/06C08L51/06C09J7/0257C09D151/06C08F8/46C08L2666/02C08L2666/04C09J7/50C08F210/16
Inventor 久米悦夫松本寿和
Owner SUMITOMO CHEM CO LTD
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