| Titre : |
Direct thickness measurement of doctor-bladed liquid film on gravure roll surface |
| Type de document : |
texte imprimé |
| Auteurs : |
Hidenobu Miura, Auteur ; Masato Yamamura, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 827-833 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Enduction
Epaisseur -- Mesure
Films plastiques
Héliogravure
Polyéthylène glycol
Polyéthylène téréphtalate
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
We provide experimental evidence that the liquid film remaining on a doctor-bladed gravure roll surface significantly influences the liquid transfer from the engraved roll surface to a moving substrate. The local free surface profiles of doctor-bladed liquid films were directly measured on both tri-helical grooves and lands (the nongrooved areas between grooves) at different roll speeds and blade thicknesses. The liquid film covered the roll surface with a finite thickness on the lands below the critical capillary number. An increase in the capillary number led to a transition from a fully filled to a starved configuration, in which the liquid barely remained on the lands and partly filled the grooves with a concave surface profile. The liquid transfer ratio monotonically decreased with a decrease in the liquid thickness on the gravure roll surface, obeying a single curve for different blade thicknesses. Furthermore, the decrease in liquid thickness promoted a flow instability transition from unstable dripping though a stable state with a uniform surface to a cascade. |
| DOI : |
10.1007/s11998-015-9714-z |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9714-z.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24681 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 5 (09/2015) . - p. 827-833
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Direct thickness measurement of doctor-bladed liquid film on gravure roll surface in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 5 (09/2015)
