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Composite conductive printing ink

A composite conductive and ink technology, applied in the field of printing ink, can solve the problems of limited application of silver paste ink, high silver powder content, and high cost of conductive ink

Active Publication Date: 2013-12-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the silver powder content of the above two conductive inks is relatively high, and the silver powder is a precious metal, which leads to the high cost of the conductive ink.
In addition, silver paste ink is prone to silver ion migration during use. In a humid environment, silver is electrolyzed under the action of an electric field, and the positively charged metal silver cations move to the cathode, and finally a short circuit fault occurs.
These limit the application of silver paste ink

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The present invention is not particularly limited to the preparation of the composite conductive ink, and the specific preparation process is preferably carried out according to the following steps:

[0050] a) dissolving the resin in an organic solvent to obtain a resin solution;

[0051] b) adding conductive components and additives to said resin solution to obtain a mixture;

[0052] c) dispersing the mixture obtained in step b) to obtain a composite conductive ink;

[0053] d) obtaining a cured ink film after curing the composite conductive ink;

[0054] The conductive component is a mixture of silver powder and graphite;

[0055] The silver powders are a mixture of flake silver powder and nano-silver powder or flake silver powder;

[0056] The graphite is a mixture of graphene and nanographite sheets or graphene.

[0057] In the present invention, the resin is first dissolved in an organic solvent to obtain a resin solution, and then a mixture of flaky silver p...

Embodiment 1

[0066] First, 10 g of diethylene glycol butyl ether acetate and 30.5 g of diethylene glycol dibenzoate were mixed to obtain a mixed solution, and then 25 g of polyurethane resin with a solid content of 40% was added thereto to obtain a resin solution. Then 1.3g dispersant Dow Corning DC-3, 1g graphene sheet, 1.7g white carbon black, 26g flake silver powder, 3g nano-spherical silver powder and 1.5g silane coupling agent Dow Corning Z-6040 were added to obtain a mixture. After the above mixture is fully pre-dispersed with a mixer, it is then dispersed with a three-roll mill. After four times of grinding with the three-roll mill, a composite conductive ink with a fine appearance is finally obtained.

[0067] Then, the above composite conductive ink is based on a PET plastic film, screen-printed with a 200-mesh screen, and then dried and cured at a temperature of 130°C for 20 minutes to finally obtain a cured composite conductive ink film with a thickness of 15 μm. .

[0068] The...

Embodiment 2

[0070] First, 26 g of propylene glycol butyl ether acetate and 30 g of diethylene glycol butyl ether were mixed to obtain a mixed solution, and then 10 g of epoxy resin 860 was added thereto to obtain a resin solution. Then 1.5g dispersant Dow Corning DC-3, 0.5g graphene flakes, 30g flaky silver powder and 2g (specifically which one) silane coupling agent Dow Corning Z-6040 were added to finally obtain a mixture. After the above mixture is fully pre-dispersed with a mixer, it is then dispersed with a three-roll mill. After four times of grinding with the three-roll mill, a composite conductive ink with a fine appearance is finally obtained.

[0071] Then, the above composite conductive ink is based on a PET plastic film, screen-printed with a 200-mesh screen, and then dried and cured at a temperature of 130°C for 20 minutes to finally obtain a cured composite conductive ink film with a thickness of 15 μm. .

[0072] The above-mentioned cured ink film was tested, and its surfa...

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Abstract

The invention provides composite conductive printing ink which comprises the following components in parts by weight: 5.0-30.0 parts of film-forming resin, 20-40 parts of a mixture of silver flakes and nano silver powder or silver flakes, 0.1-5.0 parts of a mixture of graphene and nano-graphite sheets or graphene, 1.5-11.0 parts of an additive and the balance of an organic solvent. The composite conductive printing ink provided by the invention is lower in silver content and further has a good conductive effect at the same time.

Description

technical field [0001] The invention relates to the technical field of printing ink, in particular to a composite conductive ink and a preparation method thereof. Background technique [0002] Ink is an important material used for printing packaging materials. It expresses patterns, characters and information on the substrate through printing. With the development of printing technology, the variety of inks has been increasing, usually divided into letterpress printing inks, lithographic printing inks, gravure printing inks, stencil printing inks, and special printing inks according to printing methods. Among them, special printing inks can be divided into conductive inks, foaming inks, magnetic inks and fluorescent inks. In the past ten years, with the rapid development and maturity of electronic technology, the development of conductive ink has been paid more and more attention, especially with the rapid popularization and market development of radio frequency identificat...

Claims

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Application Information

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IPC IPC(8): C09D11/10C09D11/14
Inventor 周旭峰刘兆平冯冬梅
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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