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Neural network-based UV adjustment of the photopolymer surface for modification of coating properties printed in flexography / Sanja Mahovic Poljacek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Neural network-based UV adjustment of the photopolymer surface for modification of coating properties printed in flexography Type de document : texte imprimé Auteurs : Sanja Mahovic Poljacek, Auteur ; Tamara Tomasegovic, Auteur ; Mirela Leskovac, Auteur ; Suzana Jakovljevic, Auteur Année de publication : 2020 Article en page(s) : p. 271-284 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Flexographie
Matériaux -- Epaisseur
Photopolymères
Réseaux neuronaux (informatique)
Revêtements -- Analyse
Revêtements -- Propriétés mécaniques
Revêtements organiques
Styrène-dièneIndex. décimale : 667.9 Revêtements et enduits Résumé : Processes of coating deposition often rely on printing techniques, with flexography being the most common one because of its ability to adjust the medium for the coating transfer (printing plate) to the specific type of coating and substrate by using photopolymer materials with different properties. Qualitative requirements for many types of coatings, especially in the printing industry, include uniformity, achieving desired thickness, definition of the edges of printed coating and optical density of colored coatings. This research was focused on the modification of the mechanical and surface properties of the common styrene–diene-based photopolymer materials in order to optimize the properties of the deposited coating—flexographic ink—by applying the UV post-treatment of the photopolymer. After the analyses of modified photopolymers, neural networks were built with the aim of finetuning of the photopolymer’s surface properties by the UV post-treatment. The results of the research enabled the analysis of the influence of changes that occur in the modified photopolymer material’s mechanical and surface properties on the coating thickness, optical density and printed element edge definition. Once the neural network was built, it enabled fast adjustment of the UV post-treatment of the photopolymer with the aim of optimizing the properties of the specific coating. Note de contenu : - EXPERIMENTAL : Preparation of the sample - Methods of measurement and analysis
- RESULTS AND DISCUSSION : Measurements of printing plates - Measurements of the printed coating - Neural network for the prediction of the photopolymer SFE componentsDOI : 10.1007/s11998-019-00270-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00270-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33744
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 271-284[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Tailoring the properties of deposited thin coating and print features in flexography by application of UV-ozone treatment / Tamara Tomasegovic in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
[article]
Titre : Tailoring the properties of deposited thin coating and print features in flexography by application of UV-ozone treatment Type de document : texte imprimé Auteurs : Tamara Tomasegovic, Auteur ; David Beynon, Auteur ; Tim Claypole, Auteur ; Sanja Mahovic Poljacek, Auteur Année de publication : 2016 Article en page(s) : p. 815-828 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Encre flexographique
Essais (technologie)
Flexographie
Matériaux -- Propriétés fonctionnelles
Ozone
Photopolymères
Rayonnement ultraviolet
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Printed functional materials are a rapidly growing area of interest for low-cost high-speed device manufacture with flexographic printing seen as a route to achieving this. The relationship between surface tension of the ink and surface free energy (SFE) of the photopolymer plate is a key for optimum performance. However, traditional methods of surface tension modification of the ink/coating often cannot be employed for functional inks. In this research, rapid, permanent modification of flexographic printing plate’s SFE is achieved through controlled UV-ozone treatment, and the effects of the treatment on the polar and dispersive component of SFE are analyzed by Fourier transform infrared attenuated total reflectance spectroscopy, swelling experiments, and roughness measurements. Printing trials using the modified printing plates reveal improved print uniformity and control of deposited ink layer thickness, as well as improved print features—particularly track and pad junctions which can be problematic for printed electronic applications. The ability to rapidly tailor printing plate SFE is of benefit to all volume printing applications. Furthermore, it is of critical importance for functional printing and printed electronics where surface tension of the ink is determined by the functional material and chemical modification is not possible or desirable. Note de contenu : - EXPERIMENTAL SETTINGS : Preparation of samples - Measurements and analysis methods
- RESULTS : Hardness of the printing plate - Surface free energy results - Roughness of the UV-ozone treated samples - FTIR ATR analysis - Swelling of the UV-ozone-treated photopolymer - Test printsDOI : 10.1007/s11998-016-9794-4 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9794-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27121
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 815-828[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18316 - Périodique Bibliothèque principale Documentaires Disponible