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Method of manufacturing polarizing plate

A technology of a polarizing plate and a manufacturing method, which is applied to the manufacturing field of polarizing plates, can solve problems such as residual air bubbles on the bonding surface, and achieve the effect of suppressing reverse curling and wave curling

Inactive Publication Date: 2009-08-05
SUMITOMO CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the polarizing plate produced as described above, there are cases where the side attached to the liquid crystal cell is curled into a depression (hereinafter referred to as "reverse curl") and the entire polarizing plate is wavier (hereinafter referred to as "reverse curl"). wavy curl")
Such reverse curl and wavy curl, when the polarizing plate is bonded to the liquid crystal cell, it is easy to leave air bubbles on the bonding surface, which is the cause of waste products of the liquid crystal panel

Method used

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  • Method of manufacturing polarizing plate

Examples

Experimental program
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Effect test

Embodiment 1

[0048] An amorphous polyolefin resin film [ZEONOR] (manufactured by Zeon Co., Ltd., Japan) with a thickness of 75 μm and a triacetyl cellulose film [KC8U2MW] (manufactured by Konika Minolta Co., Ltd., Japan) with a thickness of 80 μm were prepared. On one side of each of the amorphous polyolefin resin film and the triacetyl cellulose film, an epoxy resin composition [KRX492] as an adhesive was applied using a microchamber coating machine (manufactured by Fuji Machinery Co., Ltd.) as an adhesive coating device. -30] (manufactured by ADEKA Corporation). By setting the linear speed of the laminated body to 11 m / min, making the gravure roll rotate in the opposite direction to the conveying direction of the laminated material, and setting the speed of the gravure roll to 22 m / min, the thickness of the adhesive layer is about is 2 μm.

[0049] Next, the non-crystalline polyolefin resin film and the triacetyl cellulose film were bonded via the epoxy resin composition on both sides o...

Embodiment 2

[0053] In addition to the cumulative light intensity of ultraviolet rays is 143 (mJ / cm 2 ) except that a polarizing plate was obtained in the same manner as in Example 1. The results are shown in Table 1.

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Abstract

The invention relates to a method for manufacturing a polarizing plate prepared by stacking and adhering protective films (31, 32) respectively on both surfaces of a polarizer (35), comprising: overlapping the polarizer (35) and the protective films (31, 32) via adhesives to obtain a laminate (37); then adhering the laminate (37) onto a convex curved surface formed in an arcuate shape along the conveyance direction of the laminate (37), preferably on the outer surface of a roller (38) and, at the same time, irradiating an adhesive with active energy rays from active energy ray irradiation devices (39, 40) to polymerize and harden the adhesive.

Description

technical field [0001] The present invention relates to a production method of a polarizing plate which is practical as one of optical components constituting a liquid crystal display device. Background technique [0002] A polarizing plate is practical as one of optical components constituting a liquid crystal display device. Figure 4 Indicates a structure in which a linear polarizing film, which is a type of polarizing plate, is laminated on a liquid crystal cell. On the light source side surface of the liquid crystal cell 10 constituting the liquid crystal display panel, a linear polarizing film 12 is laminated with an adhesive layer 11 to form a liquid crystal display panel. [0003] A polarizing plate is generally used in a state where a protective film is laminated on both sides of the polarizing plate, incorporated into a liquid crystal display device. That is, if Figure 5 As shown, in a typical polarizing plate 20, protective films 22, 23 are laminated on both si...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B37/12G02B1/04G02B1/10G02F1/1335
CPCG02B5/30G02B1/14B29C55/04B32B7/12B32B37/0015B32B37/12C08L29/04G02B5/3041G02F1/133528
Inventor 野间弘道竹内智康松本力也
Owner SUMITOMO CHEM CO LTD
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