Gravure printing with a shear-rate-dependent ink
Gravure printing is a type of printing method that uses metal cylinders with engraved cells that hold ink. The ink is transferred directly to the paper or other material by pressing it against the cylinder. The flow associated with gravure printing includes a flow in a liquid bridge formed in the co...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2024-01-01
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| Series: | Flow |
| Subjects: | |
| Online Access: | https://www.cambridge.org/core/product/identifier/S2633425923000375/type/journal_article |
| _version_ | 1797352528972611584 |
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| author | Pauline Rothmann-Brumm Philipp Brockmann Ilia V. Roisman Jeanette Hussong Edgar Dörsam Hans Martin Sauer |
| author_facet | Pauline Rothmann-Brumm Philipp Brockmann Ilia V. Roisman Jeanette Hussong Edgar Dörsam Hans Martin Sauer |
| author_sort | Pauline Rothmann-Brumm |
| collection | DOAJ |
| description | Gravure printing is a type of printing method that uses metal cylinders with engraved cells that hold ink. The ink is transferred directly to the paper or other material by pressing it against the cylinder. The flow associated with gravure printing includes a flow in a liquid bridge formed in the contact region of the cylinders and a thin-film coating flow of the ink. The flow is governed by viscous and capillary forces. In many cases, the flow is unstable, which leads to the formation of instability patterns on the printed surfaces. The analysis of these instabilities is a very challenging problem, especially since industrial inks are usually rheologically complex. In this experimental and theoretical study, the flow of inks on a rotating cylinder is analysed, accounting for the shear-rate-dependent liquid viscosity. A theoretical solution for the film flow allows us to predict the width of the liquid bridge between two cylinders. Moreover, it is shown that the measured characteristic size of the printed pattern is of the same order as the predicted liquid bridge width. We observe a nearly linear dependence of pattern size and liquid bridge width. |
| first_indexed | 2024-03-08T13:17:56Z |
| format | Article |
| id | doaj.art-f974de02b6304c288d6589130e40cff6 |
| institution | Directory Open Access Journal |
| issn | 2633-4259 |
| language | English |
| last_indexed | 2024-03-08T13:17:56Z |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Flow |
| spelling | doaj.art-f974de02b6304c288d6589130e40cff62024-01-18T05:46:15ZengCambridge University PressFlow2633-42592024-01-01410.1017/flo.2023.37Gravure printing with a shear-rate-dependent inkPauline Rothmann-Brumm0https://orcid.org/0000-0002-8220-0676Philipp Brockmann1Ilia V. Roisman2https://orcid.org/0000-0002-9878-3650Jeanette Hussong3https://orcid.org/0000-0001-5152-1904Edgar Dörsam4https://orcid.org/0000-0002-4338-1777Hans Martin Sauer5https://orcid.org/0000-0002-8134-5144Institute of Printing Science and Technology, Technical University of Darmstadt, 64289 Darmstadt, GermanyInstitute for Fluid Mechanics and Aerodynamics, Technical University of Darmstadt, 64287 Darmstadt, GermanyInstitute for Fluid Mechanics and Aerodynamics, Technical University of Darmstadt, 64287 Darmstadt, GermanyInstitute for Fluid Mechanics and Aerodynamics, Technical University of Darmstadt, 64287 Darmstadt, GermanyInstitute of Printing Science and Technology, Technical University of Darmstadt, 64289 Darmstadt, GermanyInstitute of Printing Science and Technology, Technical University of Darmstadt, 64289 Darmstadt, GermanyGravure printing is a type of printing method that uses metal cylinders with engraved cells that hold ink. The ink is transferred directly to the paper or other material by pressing it against the cylinder. The flow associated with gravure printing includes a flow in a liquid bridge formed in the contact region of the cylinders and a thin-film coating flow of the ink. The flow is governed by viscous and capillary forces. In many cases, the flow is unstable, which leads to the formation of instability patterns on the printed surfaces. The analysis of these instabilities is a very challenging problem, especially since industrial inks are usually rheologically complex. In this experimental and theoretical study, the flow of inks on a rotating cylinder is analysed, accounting for the shear-rate-dependent liquid viscosity. A theoretical solution for the film flow allows us to predict the width of the liquid bridge between two cylinders. Moreover, it is shown that the measured characteristic size of the printed pattern is of the same order as the predicted liquid bridge width. We observe a nearly linear dependence of pattern size and liquid bridge width.https://www.cambridge.org/core/product/identifier/S2633425923000375/type/journal_articleCoatingRheologyFingering instability |
| spellingShingle | Pauline Rothmann-Brumm Philipp Brockmann Ilia V. Roisman Jeanette Hussong Edgar Dörsam Hans Martin Sauer Gravure printing with a shear-rate-dependent ink Flow Coating Rheology Fingering instability |
| title | Gravure printing with a shear-rate-dependent ink |
| title_full | Gravure printing with a shear-rate-dependent ink |
| title_fullStr | Gravure printing with a shear-rate-dependent ink |
| title_full_unstemmed | Gravure printing with a shear-rate-dependent ink |
| title_short | Gravure printing with a shear-rate-dependent ink |
| title_sort | gravure printing with a shear rate dependent ink |
| topic | Coating Rheology Fingering instability |
| url | https://www.cambridge.org/core/product/identifier/S2633425923000375/type/journal_article |
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