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Manufacturing method of polarizing plate

A manufacturing method and a technology for polarizing plates, which are applied in the field of manufacturing polarizing plates, can solve the problems of easy occurrence of curling, poor mobility of polarizing plates, and reduced working efficiency, and achieve the effect of suppressing curling

Active Publication Date: 2016-01-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this drying process, if the size of the transparent protective film etc. changes and the polarizing plate curls, there will be a problem that the mobility of the polarizing plate will deteriorate in the continuous production process of the polarizing plate.
In particular, when the dimensional change rate of the transparent protective film bonded to both sides of the polarizer is different, curling is likely to occur, which reduces work efficiency

Method used

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  • Manufacturing method of polarizing plate
  • Manufacturing method of polarizing plate
  • Manufacturing method of polarizing plate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0076]

[0077] 100 parts by weight of polyvinyl alcohol-based resin (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.: Ecomaty) and 35 parts by weight of a crosslinking agent (manufactured by Dainippon Ink Chemical Industry Co., Ltd.: WATERSOL) were dissolved in 3760 parts by weight of pure water, Prepare an aqueous adhesive solution.

Embodiment 1

[0079] (production of polarizing plate)

[0080] On one side of the above-mentioned transparent protective film 1 (a cyclic olefin-based resin film with a thickness of 25 μm) with a width of 1330 mm, the above-mentioned aqueous adhesive solution was applied so that the thickness of the adhesive layer after drying was 80 nm, and the transparent protective film 1 with adhesive was obtained. . On the other hand, on one side of the above-mentioned transparent protective film 2 (triacetyl cellulose film with a thickness of 40 μm) with a width of 1330 mm, the above-mentioned aqueous adhesive solution was applied so that the thickness of the adhesive layer after drying was 80 nm, and an adhesive-attached film was obtained. Transparent protective film2. With respect to the above-mentioned transparent protective films 1 and 2 with adhesive, the adhesive is applied in such a way that the width of the coated adhesive is the same as that of the polarizer with a width of 1160 mm, and on b...

Embodiment 2～12 and comparative example 1～12

[0082]In Example 1, as shown in Table 1, in addition to changing the width of the polarizing plate, the type of the first transparent protective film, the second transparent protective film, or the width w of the adhesive existing from the end of the polarizing plate to the outside (two A polarizing plate was produced in the same manner as in Example 1 except that the width of the side was set to be the same). It should be noted that when the adhesive width w of the obtained polarizing plate in the amplitude direction of the polarizing plate is 0 mm, as figure 2 As shown in the way, the other cases are as follows figure 1 shown in the manner. figure 1 In this method, with respect to the application of the adhesive on the above-mentioned transparent protective films 1 and 2 with an adhesive, the width w of the adhesive present from the end of the polarizer to the outside is considered to control the width of the applied adhesive.

[0083] In the above-mentioned Examples and ...

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Abstract

PURPOSE: A method for manufacturing a polarizing plate is provided to realize a wide range of optical design by improving the freedom of choice of transparent protective films and to realize a high-resolution and high-contrast image display device. CONSTITUTION: A first transparent protective film (T1) and a second transparent protective film (T2) satisfies that an absolute value of difference between dimension change rates of the first and second transparent protective films is more than 0.10. The width (Wp) of a polarizer (P) is less than the width (Wt1,Wt2) of the first and second transparent protective films. The width (w1,w2) of an adhesive (a3) which exists from the end of both ends of the polarizer toward the outside is more than 0 and less than 75mm in the width direction of the polarizer.

Description

technical field [0001] The present invention relates to a method of manufacturing a polarizing plate. The polarizing plate obtained by the manufacturing method of this invention can form image display devices, such as a liquid crystal display device, an organic electroluminescent display device, and PDP, individually or as an optical film which laminated|stacked it. Background technique [0002] In a liquid crystal display device, it is indispensable to arrange polarizing plates on both sides of a glass substrate on which the surface of a liquid crystal panel is formed by its image forming method. A polarizing plate is usually obtained by dyeing a polyvinyl alcohol-based film with a dichroic material such as iodine, crosslinking it with a crosslinking agent, and uniaxially stretching it to form a film. In addition, since a hydrophilic polymer is used for the polyvinyl alcohol-based film, it is very easily deformed especially under humidified conditions. In addition, since ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B32B37/12
CPCG02B5/30G02B1/14
Inventor 岩本展明尾迂大介中田美惠
Owner NITTO DENKO CORP