Method for producing optical laminate

一种光学层叠体、制造方法的技术，应用在光学、光学元件、仪器等方向，能够解决偏光膜外观均匀性差等问题，达到外观均匀性优异的效果

Active Publication Date: 2014-01-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the polarizing film obtained by the conventional production method, that is, the production method of coating a solution containing a lyotropic liquid crystal compound on the surface of a rubbed film substrate, has a problem of poor uniformity in appearance.

Method used

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  • Method for producing optical laminate
  • Method for producing optical laminate

Examples

Experimental program
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Embodiment

[0059] [Example]

[0060] A long film substrate 11 (thickness: 40 μm) composed of a cycloolefin-based polymer film (ZEONOR manufactured by Zeon Corporation) was prepared. The long peelable film 13 (thickness 60 μm) made of a polyethylene terephthalate film on which an adhesive layer was formed was prepared. The adhesive re-peelable film 13 is laminated on the main surface of one side of the film substrate 11 to produce a laminated film substrate 14 (step A).

[0061] Then as figure 2 As shown, the surface of the film substrate 11 is rubbed while advancing the laminated film substrate 14 (step B).

[0062] Next, a solution containing a lyotropic liquid crystal compound is applied to the surface of the film substrate 11 that has been rubbed (Step C). The solution containing the lyotropic liquid crystal compound is a solution obtained by dissolving the azo compound produced in Example 1 of JP 2009-173849 in water. The solution containing the lyotropic liquid crystal compound is natu...

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PUM

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Abstract

[Problem] A polarizing film which is obtained by a conventional production method wherein a solution containing a lyotropic liquid crystal compound is applied over the surface of a film base that has been subjected to a rubbing treatment has poor uniformity in the appearance. [Solution] This method for producing an optical laminate that has a film base and a polarizing film comprises the following steps. Step A in which a multilayer film base (14) is obtained by arranging a releasable film (13) on one main surface of a film base (11). Step B in which the other main surface of the film base (11) of the multilayer film base (14) is subjected to a rubbing treatment. Step C in which a solution that contains a lyotropic liquid crystal compound and a solvent is applied over the rubbing-treated surface of the film base (11). Step D in which the releasable film (13) is separated from the multilayer film base (14).

Description

Technical field [0001] The present invention relates to a method for manufacturing an optical laminate having a polarizing film. Background technique [0002] A general-purpose polarizing film is made by stretching a polyvinyl alcohol film and dyeing with iodine (there is also a manufacturing method that stretches after dyeing). In contrast, there is known a polarizing film manufactured by coating a solution containing a lyotropic liquid crystal compound on the surface of a film substrate subjected to a rubbing treatment (for example, Patent Document 1). The latter polarizing film has a thinner film thickness than the former polarizing film, so its development prospects are highly anticipated. [0003] However, a polarizing film obtained by a conventional manufacturing method, that is, a manufacturing method in which a solution containing a lyotropic liquid crystal compound is applied to the surface of a film substrate subjected to a rubbing treatment, has a problem of poor appear...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G02B5/30
CPCG02B5/3016G02B5/305G02B5/30
Inventor麻野井祥明梅本彻松田祥一龟山忠幸
OwnerNITTO DENKO CORP