Method for improving ink deposition uniformity of inkjet printing

Abstract

The invention belongs to the field of printing electronics, relates to the inkjet printing preparation process of an oxide film, and particularly relates to a method for improving ink deposition uniformity of inkjet printing. The method comprises the following steps: a printer substrate is kept at 50-60 DEG C, the ink droplet speed is 10m / s, the nozzles are not heated, the ink droplet spacing is 30-40 mum, multi-nozzle inkjet printing is performed on the substrate, and the number of the nozzles is 3-4; annealing is performed for 1h after printing; the ink solvent used in inkjet printing is ethylene glycol and ethylene glycol methyl ether mixed in the volume ratio of 1 / 2-2 / 1, and the ink contains polyvinylpyrrolidone equivalent to 3-5% by mass of the solvent and zirconium oxychloride octahydrate with the concentration of 0.1-1.0 M. Compared with the conventional gel template method, the problem of non-uniform deposition of the non-Newtonian fluid ink in the quick drying printing processcan be solved through simple improvement of the printer parameters.

Description

technical field [0001] The invention belongs to the field of printed electronics, and relates to an inkjet printing preparation process of an oxide film, in particular to a method for improving the ink deposition uniformity of inkjet printing. Background technique [0002] Nowadays, some inkjet printing inks contain polymers. Most of these polymer-containing solutions are non-Newtonian fluids, and have certain viscoelasticity. When they are deformed by force, they have the property of storing energy. Long tail without breaking, the inkjet state is relatively unstable, and this instability will become more serious with time, which leads to the difference between the ink deposition state in the early stage of inkjet printing and the later stage, that is, the upper and lower parts of the entire graphic Ink distribution is uneven. In theory, this situation does not have much impact on slow-drying inks, because the ink does not solidify quickly after deposition, but can flow to ...

AI Technical Summary

Problems solved by technology

However, in the actual process, the slow-drying ink cannot meet all the process requirements. For example, in some processes, in order to avoid the influence of the ink flow process on the shape of the final printed graphics, the ink is required to be quickly cured or semi-cured during deposition to fix its shape

In this case, the above problems will seriously affect the uniformity of the final graphics

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