Electric-conduction ink for micro gravure printing, and preparation method thereof

Abstract

The invention discloses electric-conduction ink for micro gravure printing, wherein the electric-conduction ink comprises, by mass, 5-10 wt% of protonic acid doped polyaniline, 20-30 wt% of a mixed resin, 50-55 wt% of a mixed solvent, 1.0-2.0 wt% of an auxiliary agent and 14-21 wt% of electric-conduction carbon black. The invention further discloses a preparation method of the ink, wherein the preparation method comprises: (1) preparing protonic acid doped polyaniline; (2) uniformly dispersing electric-conduction ink components; and (3) adding into a sand mill, and sanding to obtain the electric-conduction ink. According to the invention, the obtained electric-conduction ink can solve the problems of poor heat storage stability, non-uniform resistance distribution, low solvent selectivityand the like of the electric-conduction ink in the prior art, has characteristics of low viscosity and small fineness, and is suitable for micro gravure printing, wherein the printed product has characteristics of thin thickness, uniform and fine in appearance and excellent electrical conductivity, wherein the thickness of the printed layer is 2-30 [mu]m, and the horizontal resistance is smaller than 200 m[omega].

Description

technical field [0001] The invention relates to conductive ink, in particular to a conductive ink suitable for dimple printing and a preparation method thereof. Background technique [0002] Conductive ink is a special ink that allows current to flow. It is composed of dispersed fine conductive particles or conductive polymers. After printing on the substrate, it can act as a wire or an antenna. [0003] At present, the commonly used conductive ink has high viscosity, and the conductive ink is usually transferred to the substrate by doctor blade coating or screen printing. The thickness of the conductive printing layer of doctor blade coating and screen printing is large and uneven, and the appearance is not delicate enough. The conductive printing layer is usually used as the appearance surface of the product, which directly affects the quality of the conductive product. In addition, from the existing research and reports on conductive inks, the most common way to improve ...

AI Technical Summary

Problems solved by technology

Better conductivity and solubility of organic solvents can be applied to conductive ink systems, but after ink coating, in order to completely evaporate the solvent, a higher baking temperature is required. For some 3C products, high temperature treatment is required on the printing layer. The doped polyaniline prepared by this method will decompose and fail after high-temperature baking, and the excellent electrical conductivity will be lost, which limits the application of the ink in high temperature resistance

[0006] With the improvement of 3C product performance requirements, the printing layer is required to be thinner and thinner, the appearance is fine and uniform, and the conductivity is getting better and better. Now the general conductive ink and coating method can no longer meet the requirements.