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A kind of production method of nano silver wire transparent conductive film

A transparent conductive film and nano-silver wire technology, which is applied in the manufacture of circuits, electrical components, cables/conductors, etc., can solve the problems of low product yield, easy delamination, and difficult production, and achieve high product yield and process Simple, easy-to-implement effects

Active Publication Date: 2016-03-30
江西鑫航兴新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the production method of nano-silver wire transparent conductive film is very complicated. For example, the Chinese invention patent application number is "201110394764.X" and the patent name is "A nano-silver transparent electrode material and its preparation method". As shown in the application, there is also a Chinese invention patent application with the application number "201210190604.8" and the patent name "flexible transparent conductive film and its manufacturing method".
The process requirements of the nano-silver wire transparent conductive film disclosed in the above two patents are very high. It needs to prepare transparent ink and nano-silver wire dispersion liquid respectively, and then attach the nano-silver wire dispersion liquid to the release film or intermediate transfer printing. The film forms a nano-silver wire layer, and it is also necessary to coat an adhesion-promoting layer or a transparent ink layer on the transparent film substrate, and it needs to be dried separately before heat transfer printing. There are many shortcomings in the production process of the prior art. First, the production is very difficult and the production cost is high, and it cannot well control the uniformity and flatness of the nano-silver wires. Second, the nano-silver wire layer is bonded to the transparent film by transfer printing and hot pressing The substrate, the silver nano wire layer is easy to separate and peel off, and the silver nano wire layer and the transparent film substrate are easy to delaminate. Thirdly, the silver nano wire layer is bonded to the transparent film substrate by transfer printing and hot pressing process, The joint surface forms an optical interface, which will greatly reduce the light transmittance of the conductive film, and the conductivity of the nano-silver wire transparent conductive film is also difficult to control and realize, and the yield of finished products is low
[0003] Among them, after the silver nano wire dispersion liquid coated on the release film is dried, the silver nano wires exposed on the upper surface are far more than the silver nano wires exposed on the bottom surface, but after transfer printing, the original silver nano wires exposed on the upper surface The nano-silver wires are attached to the adhesion-promoting layer or transparent ink layer of the transparent film substrate, and the nano-silver wires exposed on the outermost surface on the transparent film substrate become less, so its conductivity is difficult to control and realize. Therefore, it is necessary to improve

Method used

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  • A kind of production method of nano silver wire transparent conductive film
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Embodiment 1

[0056] A kind of production method of nano-silver wire transparent conductive film, comprises the following steps:

[0057] A transparent substrate is selected, and the transparent substrate is selected from PC film, and the total thickness of the transparent substrate is 81-500 μm.

[0058] Prepare the nano-silver wire coating solution, uniformly stir the nano-silver wire in the glue with a solid content of 1-30wt%, and prepare the nano-silver wire coating liquid, wherein,

[0059] The glue is selected from one or more than one mixture of thermoplastic polyurethane, organic silica gel, polyethylene-vinyl acetate, polyester, polyacrylate, polyvinyl alcohol and polyvinyl acetal. In a preferred embodiment, the glue The solid content is 1~10wt%;

[0060] The average particle diameter of solid in glue is 1~25nm,

[0061] The viscosity of the glue is 2~50cps,

[0062] The diameter of nano silver wire is less than or equal to 30nm,

[0063] The length of nano-silver wire is 5-10...

Embodiment 2

[0079] The main steps and methods of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference lies in the transparent substrate:

[0080] The transparent substrate is made of PET film, and the PET film is made of PET film that has been hardened on one side or double-sided. The total thickness of the PET film is 81-500 μm, and the solid content of the glue is 1-10wt%. The film has a higher light transmittance, and at the same time has better fusion and adhesion with the silver nanowire layer. The light transmittance of the silver nanowire transparent conductive film produced is 85-92%, and the haze is less than Equal to 2%, the surface resistivity is 50~500ohm / sq.

Embodiment 3

[0082] The main steps and methods of this embodiment are the same as those in Embodiment 1, and will not be repeated here. The difference is that the transparent substrate is a PMMA-PC-PMMA three-layer composite film made by a three-layer co-extrusion process for use. , the solid content of the selected glue is 1-10wt%, the upper and lower layers of the PMMA-PC-PMMA three-layer composite film are both PMMA layers, the middle layer is a PC layer, and the PC layer and two PMMA layers are formed by a three-layer co-extrusion process as one. The three-layer composite film has higher light transmittance, and at the same time has better fusion and adhesion with the nano-silver wire layer. The light transmittance of the produced nano-silver wire transparent conductive film is 85-92%. The haze is less than or equal to 2%, and the surface resistivity is 50-500 ohm / sq.

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Abstract

A method of manufacturing a nano silver wire transparent conductive film: selecting a PC film, a PET film or a three-layer composite film made of a three-layer co-extrusion process as a transparent substrate; modulating a nano silver wire coating solution; uniformly coating the nano silver wire coating solution on the surface of the transparent substrate via the coating mechanism of a coater; and finally, drying and rolling up to obtain a finished product. The process is easy to implement, and is easy to control the quality of the conductive film, and the manufactured nano silver wire transparent conductive film has a light transmittance of 85%-92%, degree of haze less than or equal to 2%, and a surface resistivity of 50-500 ohm / sq.

Description

technical field [0001] The invention relates to the technical field of transparent conductive films, in particular to a production method of nano-silver wire transparent conductive films. Background technique [0002] In the prior art, the production method of nano-silver wire transparent conductive film is very complicated. For example, the Chinese invention patent application number is "201110394764.X" and the patent name is "A nano-silver transparent electrode material and its preparation method". As shown in the application, there is also a Chinese invention patent application with the application number "201210190604.8" and the patent name "flexible transparent conductive film and its manufacturing method". The process requirements of the nano-silver wire transparent conductive film disclosed in the above two patents are very high. It needs to prepare transparent ink and nano-silver wire dispersion liquid respectively, and then attach the nano-silver wire dispersion liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
CPCH01B13/00
Inventor 蔡文珍
Owner 江西鑫航兴新材料有限公司