High-speed imaging the effect of snap-off distance and squeegee speed on the ink transfer mechanism of screen-printed carbon pastes / Sarah-Jane Potts in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 447-459 Titre : High-speed imaging the effect of snap-off distance and squeegee speed on the ink transfer mechanism of screen-printed carbon pastes Type de document : texte imprimé Auteurs : Sarah-Jane Potts, Auteur ; Chris Philips, Auteur ; Eifion Jewell, Auteur ; Ben Clifford, Auteur ; Yin Cheung Lau, Auteur ; Tim Claypole, Auteur Année de publication : 2020 Article en page(s) : p. 447-459 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Carbone Electronique -- Matériaux Encre d'imprimerie Encre électronique Imagerie (technique) Rhéologie Sérigraphie Index. décimale : 667.9 Revêtements et enduits Résumé : Screen printing is the most widely used process in the production of printed electronics due to its ability to consistently transfer inks containing a wide range of functional materials onto a range of substrates. However, despite its extensive use, the mechanism by which the ink is transferred through the mesh and onto the substrate is not fully understood. Existing theories are contradictory and lack experimental validation. Therefore, high-speed imaging was used in combination with a screen-printing simulation rig that was designed to provide good optical access to study ink deposition during the screen-printing process. The variation in the four stages of ink flow through the screen, described in the theory by Messerschmitt, has been quantified with respect to changes in snap-off distance and squeegee speed. Analyses of the images were compared with measurements of the ink properties and corroborated with analyses of the prints. This has provided a better understanding of the mechanism by which the ink transfers from the mesh to the substrate and subsequently separates in screen printing. This could be used as the basis for the development of predictive algorithms, as well as to improve the understanding of how to optimize print quality and performance. Note de contenu : - MATERIALS AND METHODS : Rheological and extensional testing - Screen-printing visualization method - Printed line characterization - RESULTS : Rheological and extensional testing - Assessment of print contact regions and print characterization DOI : https://doi.org/10.1007/s11998-019-00291-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00291-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33995 [article]

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