Methods for producing transparent conductive film and transparent conductive pattern

Patent metadata

Field	Value
Publication number	US-10994303-B2
Application number	US-201816477614-A
Country	US
Kind code	B2
Filing date	Jan 15, 2018
Priority date	Jan 16, 2017
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Methods for producing a transparent conductive film and transparent conductive pattern having superior in-plane uniformity of resistance, by a printing method of slit coating or roll coating of metal nanowire ink. The methods include applying a metal nanowire ink containing metal nanowires, a binder resin containing more than 50 mol % monomer units derived from N-vinylacetamide, and a solvent, to at least one surface of a transparent resin film and drying to form a transparent conductive layer, the application of the metal nanowire ink to the transparent resin film being application by slit coating or roll coating performed using a transparent resin film and metal nanowire ink with which the advancing angle (θa) of the dynamic contact angle of the metal nanowire ink relative to the transparent resin film satisfies 10.0°<θa≤25.0°, and the difference (θa−θr) between the advancing angle (θa) and the receding angle (θr) is 10.0° or higher.

First claim

The invention claimed is:

1. A method for producing a transparent conductive film comprising:
a step of forming a transparent conductive layer by coating a metal nanowire ink on at least one face of a transparent resin film, and drying the coated ink,
the metal nanowire ink comprising metal nanowires, a binder resin having more than 50 mol % of monomer units derived from N-vinylacetamide, and a solvent, and
the solvent is a mixture solvent of alcohol and water, a content of the alcohol in the mixture solvent is 85 mass % or more and 95 mass % or less, and a content of saturated monohydric alcohol having 1 to 3 carbon atoms represented by C n H 2n+1 OH (n represents an integer of 1 to 3) in the alcohol is 30 mass % or more and 85 mass % or less,
wherein, the coating of the metal nanowire ink on the transparent resin film is performed by a slit coating method or a roll coating method, using the transparent resin film and the metal nanowire ink with which an advancing angle (θa) of a dynamic contact angle of the metal nanowire ink relative to the transparent resin film satisfies 10.0°<θa≤25.0°, and a difference (θa−θr) between the advancing angle (θa) and a receding angle (θr) of the dynamic contact angle is 10.0° or more.

2. A method for producing a transparent conductive film according to claim 1 , wherein the metal nanowires are silver nanowires.

3. A method for producing a transparent conductive film according to claim 1 , wherein a content of the metal nanowire in the metal nanowire ink is 0.01 to 1.5 mass %.

4. A method for producing a transparent conductive film according to claim 1 , wherein the transparent resin film is a film made of a resin selected from a group consisting of polyester, polycarbonate, an acrylic resin, and a cycloolefin polymer.

5. A method for producing a transparent conductive film according to claim 1 , wherein a content of the binder resin in the metal nanowire ink is 0.1 to 2.0 mass %.

6. A method for producing a transparent conductive film according to claim 1 , further comprising a step of forming an overcoat layer which covers the transparent conductive layer.

7. A method for producing a transparent conductive pattern comprising a step of patterning a transparent conductive layer of the transparent conductive film obtained by the method for producing the transparent conductive film according to claim 1 .

8. A method for producing a transparent conductive pattern according to claim 7 , further comprising a step of forming an overcoat layer which covers the transparent conductive pattern.

Assignees

• Showa Denko Kk

Inventors

• Yamaki Shigeru

Classifications

• H01B5/12

  Braided wires or the like · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09D11/037 Primary

  characterised by the pigment · CPC title

• B05D7/12 Primary

  to leather (chemical treatment of leather C14C; dyeing leather D06P) · CPC title