C01

Forced Wetting with Hydrodynamic Assist on Gravure Print Cylinders

Overview

The aim of printing is fast, efficient, and fine-structured wetting of technical surfaces – paper, polymer foil, textiles, metal, glass – with a liquid medium. This could be graphical printing inks, dispersions of color pigments. Increasingly, printing is concerned with “functional” matter, with nano dispersions of metals or oxides, and with polymer solutions.

Image gallery

We investigate the hydrodynamics of the transfer process of simple as well as of complex fluids, and we focus on the very moment of contact of the gravure cylinder surface with the substrate. This also includes transport and relaxation phenomena of the free liquid surface in the short instant that follow the moment of contact between solid body, liquid and gas phase. The dynamics of the sensitive free liquid-gas interface and of the wetting line determines the technical quality of printing. And it determines the printer’s added value to the product. This has ever been the key insight in graphical industries. It is even more important, and challenging, in future applications of functional printing. A rapidly increasing variety of new materials demands for adequate, advancing printing process solutions. Optical anti-reflection layers, organic and polymeric semiconductors for upcoming energy creation, lighting, display and communication technologies may serve as examples here.

It is our aim to make the transport phenomena in the critical instant of printing visible to the eye, and perceivable to mind. We strive for identifying, and for an understanding of processes that take place within few tens of µm, and within a millisecond. We want to compare this with the dynamics of free liquid surfaces of steam generation in a heated boiler, at the fuel injection nozzle inside of an air plane engine, and in the imbibition of liquids in a granular or porous medium or polymer network.

For this purpose we employ most recent developments of printing industries such as laser engraved or etched printing sleeve technologies, high-precision machine drives and positioning systems, and high-speed inline inspection camera systems. We are looking for those limits to gravure printing that are imposed by nothing less than the laws of physics themselves.

Team

  Name Contact
Edgar Dörsam
Prof. Dr.-Ing. Edgar Dörsam
+49 6151 16-22780
S1|10 203
Dr. Hans Martin Sauer
+49 6151 16-22857
S1|10 206
Pauline Brumm, M.Sc.
+49 6151 16-22902
S1|10 119
Julian Schäfer, M.Sc.
+49 6151 16-23778
S1|10 314

Publications

Jump to: 2019 | 2018 | 2017
Number of items at this level: 10.

2019

Stamm, Jacqueline and Daume, Dominik and Hartwig, Tobias and Oschmann, Maximilian and Schäfer, Julian and Sauer, Hans Martin and Dörsam, Edgar (2019):
Dynamic interferometric imaging of the thickness distribution of evaporating thin liquid films.
In: Journal of Coatings Technology and Research, ISSN 1935-3804,
DOI: 10.1007/s11998-019-00236-z,
[Online-Edition: https://doi.org/10.1007/s11998-019-00236-z],
[Article]

Brulin, Sebastian and Schäfer, Julian and Roisman, Ilia V. and Dörsam, Edgar (2019):
Analysis of contact line behaviour during liquid bridge stretching and its effect on residual volumes after break-up.
In: 10th International Conference on Multiphase Flow, Rio de Janeiro, May 19-24, 2019, [Conference or Workshop Item]

Schäfer, Julian and Brulin, Sebastian and Roisman, Ilia V. and Sauer, Hans Martin and Dörsam, Edgar (2019):
Transient liquid finger pattern formation between a gravure cylinder and a planar plate.
In: 10th International Conference on Multiphase Flow, Rio de Janeiro, May 19-24, 2019, [Conference or Workshop Item]

Brumm, Pauline and Sauer, Hans Martin and Dörsam, Edgar (2019):
Scaling Behavior of Pattern Formation in the Flexographic Ink Splitting Process.
In: Colloids and Interfaces, p. 37, 3, (1), ISSN 2504-5377,
DOI: 10.3390/colloids3010037,
[Online-Edition: https://www.mdpi.com/2504-5377/3/1/37],
[Article]

Herzog, Nicole and Brilmayer, Robert and Stanzel, Mathias and Kalyta, Anastasia and Spiehl, Dieter and Dörsam, Edgar and Hess, Christian and Andrieu-Brunsen, Annette (2019):
Gravure printing for mesoporous film preparation.
In: RSC Advances, Royal Socienty of Chemistry, pp. 23570-23578, 9, (41), ISSN 2046-2069,
DOI: 10.1039/C9RA04266K,
[Online-Edition: https://doi.org/10.1039/C9RA04266K],
[Article]

Schäfer, Julian and Roisman, Ilia V. and Sauer, Hans Martin and Dörsam, Edgar (2019):
Millisecond fluid pattern formation in the nip of a gravure printing machine.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, pp. 222-229, 575, ISSN 09277757,
DOI: 10.1016/j.colsurfa.2019.04.085,
[Online-Edition: https://doi.org/10.1016/j.colsurfa.2019.04.085],
[Article]

2018

Schäfer, Julian and Sauer, Hans Martin and Dörsam, Edgar (2018):
Direct observation of high-speed fluid Transfer phenomena in the nip of a gravure printing machine.
In: Proceedings of the 45th International Research Conference of Iarigai, Warsaw, Poland, In: 45th International Research Conference of IARIGAI, Warsaw, Poland, October 03-07, 2018, [Online-Edition: http://iarigai-warsaw2018.pl/],
[Conference or Workshop Item]

Schäfer, Julian and Roisman, Ilia V. and Sauer, Hans Martin and Dörsam, Edgar (2018):
Millisecond fluid pattern formation in the nip of a gravure printing machine.
In: ECIS 2018 - Annual Conference of the European Colloid and Interface Society, Ljubljana, September 2-7, 2018, [Conference or Workshop Item]

Auernhammer, Günter K. and Henrich, Franziska and Linke, Dorota and Sauer, Hans Martin and Dörsam, Edgar and Hardt, Steffen and Butt, Hans-Jürgen (2018):
Forced dynamic dewetting of structured surfaces: Influence of surfactants.
In: DPG-Frühjahrstagung und EPS-CMD27, Berlin, March 11-16, 2018, [Conference or Workshop Item]

2017

Sauer, Hans Martin and Schäfer, Julian and Brulin, Sebastian and Roisman, Ilia V. (2017):
Fast liquid sheet and filament dynamics in the fluid splitting process.
In: ECIS 2017 31st Conference of the European Colloid and Interface Society, Madrid, 03.-08.09. 2017, [Conference or Workshop Item]

This list was generated on Mon Oct 14 01:31:33 2019 CEST.