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Discrete element method to predict the mechanical properties of pigmented coatings / Dan Varney in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
[article]
Titre : Discrete element method to predict the mechanical properties of pigmented coatings Type de document : texte imprimé Auteurs : Dan Varney, Auteur ; Martti Toivakka, Auteur ; Doug Bousfield, Auteur Année de publication : 2019 Article en page(s) : p. 1683-1689 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eléments discrets, Méthode des
Papier
Pigments
Revêtements -- Fissuration
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The mechanical properties of pigmented coating layers are important in a variety of applications. However, the large number of parameters that influence these properties as well as the numerous types of deformations challenge the prediction of the performance of these systems. A discrete element method (DEM) is proposed to predict the mechanical properties of paper coating layers that have a range of starch and latex content. The model is developed in both 2D and 3D and is adapted to tensile and flexural deformations. The model predictions are compared to experimental results in the literature. The predictions are generally good for the moduli and the strain at failure of the systems, but underpredict the maximum stress. This result may be caused by the complex particle size distribution of the experimental systems or by the impact of the brittleness of the starch when making the freestanding films. DOI : 10.1007/s11998-019-00255-w En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00255-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33421
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 6 (11/2019) . - p. 1683-1689[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21321 - Périodique Bibliothèque principale Documentaires Disponible Modeling the penetration of polymer into paper during extrusion coating / Mubarak Khlewee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
[article]
Titre : Modeling the penetration of polymer into paper during extrusion coating Type de document : texte imprimé Auteurs : Mubarak Khlewee, Auteur ; Mohammed Al-Gharrawi, Auteur ; Doug Bousfield, Auteur Année de publication : 2022 Article en page(s) : p. 25-34 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Enduction
Extrusion (mécanique)
Fibres cellulosiques
Modèles mathématiques
Nanofibres
Papier -- Revêtements
Papier et carton couché
Pénétration (physique)
Polyéthylène
Revêtements organiques
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : During the extrusion coating of paper or paperboard, a molten film of polymer is pressed against a paper surface to generate waterproof packaging materials. Hot-melt glues are also applied to various porous materials and paperboard to generate packaging. In both cases, the penetration of the polymer into the pore space influences the product performance and the ability of the product to be recycled at the end of life. While there is much experimental work discussing various parameters in these operations, little theoretical work has been reported. Here, a simple model based on Darcy’s law is proposed to predict the penetration of polyethylene (PE) into paper and paper that has been coated with cellulose nanofibers (CNF). Another model, based on the flow of a polymer into a pore that includes dynamic heat transfer is developed, where the viscosity is a function of temperature. Experiments were conducted where a PE film is pressed against samples and the amount of fiber recovery is characterized. The model predictions are compared to experimental results. Good agreement for different paper types, pressing times, and temperatures is obtained after a calibration factor is used. DOI : https://doi.org/10.1007/s11998-021-00487-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00487-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37142
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 25-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23313 - Périodique Bibliothèque principale Documentaires Disponible