Printhead Health in Industrial Inkjet Printing: In-Line and Off-Line Detection of Poor Drop Formation

2017 ◽  
pp. 431-444 ◽  
Author(s):  
Herman Wijshoff
Keyword(s):  
Inkjet Printing ◽  
Line Detection ◽  
Drop Formation

scholarly journals Effect of physical parameters and temperature on the piezo-electric jetting behaviour of UV-curable photochromic inks

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sina Seipel ◽  
Junchun Yu ◽  
Vincent A. Nierstrasz
Keyword(s):  
Inkjet Printing ◽  
High Speed ◽  
Theoretical Calculations ◽  
Uv Curing ◽  
Physical Parameters ◽  
Drop Formation ◽  
Visual Evaluation ◽  
Uv Curable ◽  
Functional Textiles ◽  
And Performance

Abstract Although resource-efficient processes like inkjet printing have a large potential to foster the development of smart and functional textiles, one bottleneck still is the development of functional inks. To make inkjet printing and UV curing given production techniques for smart and functional specialty products, e.g. photochromic textiles, deepened knowledge about the development, rheological behavior and jetting behavior of functional ink is needed. This paper focuses on the formulation and performance of UV-responsive and UV-curable inkjet inks, which are based on photochromic dyes and their application to produce UV-responsive textiles. Two commercial photochromic dyes—Reversacol Ruby Red (RR) and Sea Green (SG), which represent dyes of the naphthopyran and spirooxazine class, respectively, have been used to develop the inks. The photochromic inks are characterized according to their physical–chemical and rheological properties in respect to temperature. The influence of temperature on the drop formation of the inks in an industrial print head is analyzed using a high-speed camera, which reveals important information regarding challenges in ink jettability. It was found that the dye structure and type used in the ink can influence the jetting behavior of photochromic UV-curable ink. More pronounced temperature sensitivity of dyes can increase the temperature-related effects of drop formation as was observed for SG ink. The printability of the RR and SG inks is framed and underpinned by theoretical calculations of the Z number. Discrepancies are observed and discussed between existing theory of ink jettability and visual evaluation of the photochromic ink.

Surfactants influence jetting dynamics and drop formation in inkjet printing

Scilight ◽  
2021 ◽  
Vol 2021 (30) ◽  
pp. 301110
Author(s):  
Leigh Ann Green
Keyword(s):  
Inkjet Printing ◽  
Drop Formation

Drops forming in inkjet printing of flexible electronic circuits

Circuit World ◽  
2017 ◽  
Vol 43 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Grzegorz Tomaszewski ◽  
Jerzy Potencki
Keyword(s):  
Inkjet Printing ◽  
Research Method ◽  
Design Methodology ◽  
Drop Formation ◽  
Print Quality ◽  
Electronic Circuits ◽  
Content Type ◽  
Printing Processes ◽  
Nanoparticle Ink ◽  
Practical Implications

Purpose This paper aims to study drop formation in piezoelectric industrial printheads during the inkjet printing processes. It presents how the piezoelectric printhead forms drops of nanoparticle ink and how the problems with different values of drop parameters may influence the printed pattern’ defects and quality. Design/methodology/approach A piezoelectric printhead with 128 nozzles was activated to operate in a controlled manner, and the droplets ejected from the nozzles were observed during falling and analysed in the printview system. The effect of varying the values of drop parameters on print quality and pattern defects has been analysed and discussed. Findings The obtained results allow the identification of the sources of the technological problems in obtaining repeatable performance drops with the desired properties, and indicate the importance of choosing the appropriate individually chosen strategy of controlling the printing for each individual application to get good-quality and free-from-defects patterns. Research limitations/implications Because of the chosen research method (arbitrary selected printhead type and ink manufacturer), this study could have limited universality. Authors encourage the study of other kinds of piezoelectric heads or other conductive inks. Practical implications This study includes practically useful applications for users to improve the inkjet print quality. Originality/value This study presents results of original empirical research works on problems of the drops forming in the inkjet printing process, and finally, it identifies problems that must be resolved to disseminate this technology.

Studies on preparation of ceramic inks and simulation of drop formation and spread in direct ceramic inkjet printing

2005 ◽  
Vol 169 (3) ◽  
pp. 372-381 ◽  
Author(s):  
N. Ramakrishnan ◽  
P.K. Rajesh ◽  
P. Ponnambalam ◽  
K. Prakasan
Keyword(s):  
Inkjet Printing ◽  
Drop Formation

Effects of nozzle and fluid properties on the drop formation dynamics in a drop-on-demand inkjet printing

2019 ◽  
Vol 40 (9) ◽  
pp. 1239-1254 ◽  
Author(s):  
A. B. Aqeel ◽  
M. Mohasan ◽  
Pengyu Lv ◽  
Yantao Yang ◽  
Huiling Duan
Keyword(s):  
Inkjet Printing ◽  
Drop Formation ◽  
On Demand ◽  
Drop On Demand ◽  
Formation Dynamics ◽  
Fluid Properties

Inkjet Printing of Highly Loaded Particulate Suspensions

MRS Bulletin ◽  
2003 ◽  
Vol 28 (11) ◽  
pp. 815-818 ◽  
Author(s):  
Brian Derby ◽  
Nuno Reis
Keyword(s):  
Physical Properties ◽  
Inkjet Printing ◽  
Colloidal Suspension ◽  
Drop Formation ◽  
Concentrated Suspensions ◽  
Particulate Suspensions ◽  
Critical Issues ◽  
Delivery Mechanism ◽  
Liquid Suspensions ◽  
Highly Loaded

AbstractInkjet printing is an attractive method for patterning and fabricating objects directly from design or image files without the need for masks, patterns, or dies. In order to achieve this with metals or ceramics, it is often necessary to print them as highly concentrated suspensions of powders in liquids. Such liquid suspensions must have physical properties appropriate to the inkjet delivery mechanism. These properties are presented using a nondimensional formalism to illustrate the requirements for both drop formation and spreading on impact. Further critical issues relevant to inkjet printing of particulate suspensions are discussed and illustrated with experiments on a model alumina-containing colloidal suspension.

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