Q.What are the most important factors to consider in setting up IJ manufacturing
A. In terms of materials, the IJ ink and the substrate. As for the system, the inkjet printhead and its controls as well as pre- and post-processing steps need to be considered.
Q. What verifications should be made before running a discharge evaluation?
A. Inks are generally a mixture of solvents, which liquify the ink, and solutes which give the ink its function, but these require dispersion stability to be evaluated for long-term storage and physical properties to be adjusted to the printhead. Furthermore, a material compatibility evaluation is also necessary to ensure that there are no undesired effects on the materials of the printhead or ink flow path. (Elephantech uses Safety Data Sheets for easy discharge evaluation)
Q. What are the physical properties that need to be measured for the ink formula?
A. Viscosity, surface tension, density and acoustic velocity are essential. Wettability will also become important in relation to the substrate.
Q. What do you evaluate in a discharge evaluation test?
A. Elephantech’s initial discharge evaluation looks at items such as initial fillability, intermittent discharge performance, weight and speed followability, and frequency characteristics.
Q. Is there anything other than the ink that can be adjusted to improve discharge evaluation results?
A.Other than the ink, corrective adjustments can be made, for example, to the inkjet printhead’s waveforms and the ink’s temperature. Other methods to compensate for poor discharge performances include making adjustments to the printhead gap and drive frequency during drawing.