Conducting ink for static jetting printing process and preparation method thereof

Abstract

The invention belongs to the field of conducting ink, and discloses conducting ink for a static jetting printing process. The conducting ink is prepared from the following raw materials in parts by weight: 0.05 to 0.5 part of nanometer metal wires, 0.05 to 2 parts of resin, 0.05 to 0.5 part of bonding agents, 0.05 to 0.5 part of functional additives and 90 to 99.5 part of solvents. The invention also discloses a preparation method of the conducting ink. The conducting kin has the advantages that the printing adaptability of the conducting ink in the static jetting printing electronic process is realized; the requirement of realizing one-step pattern printing by a mask-free micro / nanometer processing static jetting printing electronic technology is met; patterned line patterns prepared by using the conducting ink on a rigid or flexible substrate through the static jetting printing process have high conductivity, low fog degree and high light transmission rate.

Description

technical field [0001] The invention belongs to the field of conductive ink, and in particular relates to a conductive ink used in an electrostatic jet printing process and a preparation method thereof. Background technique [0002] Touch electronics has become a hotspot in the development of the current electronics industry. For example, touch screens, flexible displays, wearable devices, and vehicle touch electronics for various electronic products have received widespread attention and applications around the world. The transparent circuit pattern forming technologies used in the field of touch electronics can be divided into three categories. One is the subtractive method, such as the ITO vacuum sputtering film forming technology, in which the ITO transparent conductive material is deposited on the substrate, the photoresist layer is patterned on the ITO layer by lithography, and then the ITO layer is deposited etched into a pattern. The other is the additive method us...

AI Technical Summary

Problems solved by technology

[0005] Existing inks are difficult to meet the requirements of electrostatic jet printing suitability. Printing suitability mainly includes: stable Taylor cone, no dispersion, no discharge, stable jet flow

At present, the nano-silver wire ink / ink on the market has a discharge phenomenon during electrostatic spraying, which makes it impossible to form a Taylor cone under the action of an electrostatic field, and thus cannot form a jet, making it difficult to achieve patterning.

In addition, some opaque granular inks, such as silver paste, silver particle inkjet ink, etc., can meet the requirements of no discharge, and can form a cone and form a jet, but the stability of the Taylor cone is insufficient, and the jet cannot be concentrated and not dispersed

Although it can be drawn as a graph, the edge of the drawn graph is not smooth and not transparent, so it cannot be applied in the touch electronics industry

Such as the patent applied by EXAX Co., Ltd. in China, the silver organosol ink for forming conductive patterns disclosed by the publication number CN101258449A; the Chinese patent applied by Kunshan Haisi Electronic Technology Co., Ltd., a kind of nano particle conductive ink disclosed by the patent number CN101684214A and Its preparation method; the inks / inks mentioned in these technical solutions cannot meet the requirements of the electrostatic jet printing process