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Laminated optical film, method for producing laminated optical film, optical member, and image display device

A manufacturing method and optical film technology, which is applied to lamination devices, optical elements, optical elements, etc., can solve the problems of increased thickness, inability to stack components sequentially, troublesome manufacturing, etc., and achieve the effect of excellent scratch resistance

Inactive Publication Date: 2018-03-27
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to form the air layer in this way, each member must be arranged with a certain distance, so the members cannot be stacked sequentially, and the manufacturing is troublesome.
In addition, if the optical members are combined through a spacer (frame) or the like in order to maintain the air layer, the overall thickness will increase, which also runs counter to the demand for thinner and lighter weight.

Method used

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  • Laminated optical film, method for producing laminated optical film, optical member, and image display device
  • Laminated optical film, method for producing laminated optical film, optical member, and image display device
  • Laminated optical film, method for producing laminated optical film, optical member, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0221] Next, examples of the present invention will be described. However, the present invention is not limited by the following examples.

[0222] Example

[0223] In this example, the laminated optical film of the present invention was produced as follows. In addition, the number of parts of the substance used for manufacture is a weight part (mass part) unless otherwise indicated. In addition, concentration (%) is weight % unless otherwise indicated.

reference example 1

[0224] [Reference Example 1: Formation of void layer]

[0225] 8 parts of methyltrimethoxysilane were dissolved in 18 parts of DMSO. 4 parts of 0.01 mol / L oxalic acid aqueous solution was added to the said liquid mixture, and it stirred at room temperature for 30 minutes, and hydrolyzed methyltrimethoxysilane. After further adding 65 parts of DMSO, 3 parts of 28% aqueous ammonia and 2 parts of pure water, it was stirred at room temperature for 15 minutes, and heated and aged at 40° C. for 20 hours to obtain a gel compound. Break the gel-like compound into granules with a size of several mm to several cm, add IPA 4 times the amount of the gel, stir gently, let stand at room temperature for 6 hours, and decant the solvent and the gel in the gel. catalyst. The same decantation treatment was repeated three times to complete the solvent replacement. This gel-like compound was subjected to high-pressure medialess pulverization (homogenizer (trade name UH-50, manufactured by SMT C...

reference example 2

[0226] [Reference Example 2: Formation of void layer]

[0227] Add 13 parts of water to 20 parts of alumina sol (4.9% concentration: manufactured by Kawaken Fine Chemicals Co., Ltd.), heat at 80°C, and then add 3 parts of NH 3 . Further, heating was performed at 80° C. for 10 hours to obtain a gel-like compound. Except having used this gel-like compound instead of the gel-like compound of Reference Example 1, it carried out similarly to Reference Example 1, and obtained the low-refractive-index void layer with a refractive index of 1.24.

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Abstract

The purpose of the invention is to provide a laminated optical film capable of achieving both high voidage (porosity) and excellent scratch resistance. In this laminated optical film, a void layer isformed on a resin film, and a cover layer is directly formed on the void layer. The void layer has a water contact angle of 90 degrees or greater and a voidage of 30 vol% or higher.

Description

technical field [0001] The present invention relates to a laminated optical film, a method for producing the laminated optical film, an optical member, and an image display device. Background technique [0002] When two substrates are arranged with a certain interval therebetween, the space between the two substrates becomes an air layer. Thus, the air layer formed between the substrates functions, for example, as a low-refractive layer that totally reflects light. Therefore, for example, in the case of an optical film, members such as prisms, polarizing films, and polarizers are arranged at a certain distance, and an air layer serving as a low-refractive index layer is provided between the members. However, in order to form the air layer in this way, it is necessary to arrange each member with a certain distance, so that the members cannot be stacked sequentially, and manufacturing is troublesome. In addition, if the optical members are combined through a spacer (frame) o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/18B32B7/02G02B1/14C08J7/043C08J7/046C08J7/056
CPCB32B5/18G02B1/111G02B1/14C08J7/043C08J7/046C08J7/042C08J7/056B32B27/08B32B27/26B32B37/025B32B2551/00B32B2307/73B32B2038/0076B32B2305/026C08J2367/02C08J2429/04
Inventor 服部大辅中村恒三细川和人
Owner NITTO DENKO CORP
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