High-uniformity ink-jet printing method of large-area films and printing system

A technology of inkjet printing, printing system, applied in the direction of copying/marking method, printing, etc., to achieve the effect of achieving overall uniformity and easy printing

Active Publication Date: 2017-11-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to the solute transport between droplets, it is difficult to directly apply large-area th

Method used

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  • High-uniformity ink-jet printing method of large-area films and printing system
  • High-uniformity ink-jet printing method of large-area films and printing system
  • High-uniformity ink-jet printing method of large-area films and printing system

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Embodiment Construction

[0031] The present invention will be described in further detail below.

[0032] A large-area and high-uniformity thin-film inkjet printing method includes the following steps. Firstly, the substrate is cleaned and dried: the substrate is placed in a cleaning solution, the substrate is cleaned by ultrasonic vibration, and the substrate is dried after cleaning. Second, thin film printing: set printing parameters and graphics, and use a non-contact dot-jet printing system to print on the cleaned and dried substrate. The lower part of the substrate is heated while printing, and the printing ink uses low-temperature gelled ink. Finally, the film is dried: the lower part of the substrate continues to be heated to dry the film. , The boiling point of the low-temperature gelling ink solvent is 150-200°C, the viscosity is 6-10cp, the surface tension is 20-30dyne / cm, and the sintering temperature is 120-200°C. The gelation temperature is 80-90°C, and it can be filtered through a 0.22-...

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Abstract

The invention relates to a high-uniformity ink-jet printing method of large-area films. The method comprises the following steps: firstly washing and drying a substrate by putting the substrate in a washing solution, washing the substrate by using ultrasonic oscillation and drying the substrate after washing; secondly printing films by setting printing parameters and graphs, printing on the washed and dried substrate by using a non-contact spot-jetting printing system, heating the lower part of the substrate during printing, wherein printing ink adopts low-temperature gelatinization ink; and finally drying the films by continuously heating the lower part of the substrate and drying the films. Compared with the prior art, the problem of low uniformity during ink-jet printing of the large-area films is solved; a method of heating and printing the substrate is adopted on the basis of considering the coffee-ring effect of single liquid droplet; the printing liquid droplets are used for simultaneously printing and forming gelatinization edge areas; the flowing of a large amount of fluid between liquid droplets is avoided, so that the overall uniformity of printing of the films is achieved.

Description

technical field [0001] The invention relates to the field of preparation of printed electronic devices, in particular to a large-area and high-uniformity film inkjet printing method and a printing system. Background technique [0002] The existing inkjet printing thin film morphology control technology is mostly based on the suppression of the "coffee ring" effect of a single droplet, so that the shape of the dried droplet occurs as figure 1 changes shown. Under the premise of the pinning of the three-phase line of the droplet, the solvent evaporation at the edge of the droplet is much greater than the volume loss of the liquid, so the solvent replenishes from the center area to the edge to form an outward capillary flow, so that the solute gathers at the edge to form a "coffee ring" . There are many ways to control it, including changing the ink composition, the state of the substrate, and adding special equipment to suppress and eliminate the "coffee ring" in each proces...

Claims

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Application Information

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IPC IPC(8): B41M5/00B41J2/11B41J2/07B41J2/05
CPCB41J2/05B41J2/072B41J2/11B41M5/0011B41M5/0047
Inventor 宁洪龙陶瑞强姚日晖陈建秋杨财桂周艺聪蔡炜朱镇南魏靖林彭俊彪
Owner SOUTH CHINA UNIV OF TECH
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