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Method of manufacturing polarizing plate

A manufacturing method and technology of polarizing plates, which are applied in optics, optical elements, polarizing elements, etc., can solve the problems of poor appearance of polarizing plates, and achieve the effect of preventing the mixing of foreign matter and excellent appearance

Active Publication Date: 2016-07-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to this method, there is a problem that the appearance of the obtained polarizing plate is poor.

Method used

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  • Method of manufacturing polarizing plate
  • Method of manufacturing polarizing plate

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Embodiment Construction

[0026] Hereinafter, one embodiment of the present invention will be described, but the present invention is not limited to these embodiments.

[0027] The method for producing a polarizing plate of the present invention includes the steps of obtaining a laminate having a long resin substrate and a PVA-based resin layer formed on one side of the resin substrate (lamination step); and stretching the laminate. The process (stretching process); the process of dyeing the PVA-based resin layer (dyeing process); the process of trimming the width direction ends of the laminate (trimming process); The process of strip-shaped protective film (pasting process). Hereinafter, each step will be described.

[0028] A. Lamination process

[0029] figure 1 It is a partial sectional view of the laminated body which concerns on preferable embodiment of this invention. The laminated body 10 has a resin base material 11 and a polyvinyl alcohol-based resin layer 12 . The laminated body 10 is ...

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Abstract

The invention provides a method of manufacturing a polarizing plate which has excellent appearance. The method comprises the following steps: a step of obtaining a resin base material which assumes a long bar shape and a laminated body (10) of a polyving akohol system resin layer which is formed on a single side of the resin base material; a step of stretching the laminated body (10); a step of dyeing the polyving akohol system resin layer; a step of prior to the dyeing, cutting edges of an end part (10a) in the width direction of the laminated body (10); and a step of after the stretching and the dyeing, adhering the long-bar-shaped protective film to the polyving akohol system resin layer. An end surface in the length direction of the laminate body upon adhering is a cut off surface formed by cutting edges.

Description

technical field [0001] The present invention relates to a method for manufacturing a polarizing plate. Background technique [0002] In a liquid crystal display device which is a typical image display device, polarizing films are arranged on both sides of a liquid crystal cell due to its image forming method. As a method for producing a polarizing film, for example, a method has been proposed in which a laminate having a resin base material and a polyvinyl alcohol (PVA) resin layer is stretched, dyed, and a polarizing film is obtained on the resin base material ( For example, Patent Document 1). According to this method, since a thin polarizing film can be obtained, it can contribute to the thinning of image display devices in recent years, and thus has attracted attention. [0003] The above-mentioned polarizing film is usually used as a polarizing plate by attaching a protective film. When a protective film is attached to the polarizing film (laminated body) formed on t...

Claims

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Application Information

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IPC IPC(8): G02B5/30
CPCG02B5/3033
Inventor 国方智中野勇树后藤周作池岛健太郎
Owner NITTO DENKO CORP