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Electroconductive film, and method for manufacturing electroconductive film

A technology of conductive film and manufacturing method, which is applied in the direction of chemical instruments and methods, cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, etc., which can solve the problems of conductive anisotropy, transparency, and difficulty in reducing The use of conductive materials and other issues, to achieve the effect of excellent stability of resistance value and excellent cost

Active Publication Date: 2019-06-25
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in such prior art, it is difficult to reduce the amount of conductive material used, so there are problems in terms of cost, difficulty in improving transparency, and development of anisotropy in conductivity.

Method used

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  • Electroconductive film, and method for manufacturing electroconductive film
  • Electroconductive film, and method for manufacturing electroconductive film
  • Electroconductive film, and method for manufacturing electroconductive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086]

[0087] As the binder resin, use -SO 3 Na-based polyester resin aqueous dispersion. This aqueous polyester dispersion was prepared using PES resin A-647GEX manufactured by Takamatsu Oil & Fat Co., Ltd. so that the solid content concentration would be 5% by mass. Hereinafter, such an aqueous polyester dispersion is referred to as a PES resin aqueous solution.

[0088] Methanol (MeOH) and 2-propanol (IPA) were prepared in order to prepare a mixed dispersion medium of water+alcohol by mixing with water as the dispersion medium of the above-mentioned silver nanowire dispersion liquid.

[0089] The above-mentioned silver nanowire dispersion using water as a dispersion medium and the above-mentioned 5% by mass aqueous solution of PES resin were placed in a container with a lid, and various solvents were added, and the lid was put on and mixed with a mixing rotor. In this case, the mixed composition of the solvent was water:MeOH:IPA mass ratio=72:18:10. In addition, the ...

Embodiment 2

[0109] The difference from Example 1 is that the silver nanowires are coated so that the wet film thickness becomes about 10 μm. Except for this point, it carried out similarly to Example 1. The results are shown in Table 1. It was confirmed that the occupied area of ​​silver nanowires (AgNW) of the obtained conductive film was 3.75%, and the surface resistance value was 1.8×10 3 Ω / □, the variation of the surface resistance value is less than 7%, and the conductive film has uniform conductivity. In addition, it was confirmed that the total light transmittance was higher than 91.2%, the haze was less than 0.48%, and the transparency was extremely excellent.

Embodiment 3

[0111] The difference from Example 1 is that the silver nanowire ink using water solvent. Except for this point, it carried out similarly to Example 1. The results are shown in Table 1. Compared with Example 1 in which a mixed solvent of water and alcohol was used, the variation in the surface resistance value was slightly more than 15%, but it was a level that would not hinder the use.

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Abstract

An electroconductive film is provided with: a polymer film; a base resin layer formed on at least one surface of the polymer film; and an electroconductive layer formed on the base resin layer and including metal nanowire having an average diameter of 1-100 nm, and an aspect ratio average of 100-2000, and a binder resin. The surface resistance value of the electrically conductive layer is 1.0 * 102-1.0 * 106 Omega / Box, and variation of the surface resistance value is 15% or less.

Description

technical field [0001] The present invention relates to a conductive film and a method for producing the conductive film. Background technique [0002] Metal nanowires have been attracting attention in recent years as raw materials for highly transparent and highly conductive thin films used as substitutes for ITO (indium tin oxide) films used in transparent electrodes such as touch panels. Such metal nanowires are generally produced by heating a metal compound in the presence of a polyhydric alcohol such as polyvinylpyrrolidone or ethylene glycol (Non-Patent Document 1). [0003] Patent Documents 1 to 3 disclose transparent conductors in which a conductive layer including a particle metal bar coating film or metal nanowires is directly formed on a polymer film such as polyester. In this case, the conductive layer is formed by directly applying a solution in which granular metal rods or metal nanowires are dispersed on a polymer film such as polyester, followed by drying to...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B13/00B05D7/24B32B7/02B05D5/12B32B27/18
CPCB05D5/12B05D7/24B32B7/02B32B27/18H01B5/14H01B13/00H01B1/16C08J7/044
Inventor 藤平惠清水诚吾山田俊辅山木繁基里达·古纳努鲁克萨蓬
Owner SHOWA DENKO KK
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