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A. Arzate, G. Ascanio, P.J. Carreau, P.A. Tanguy
Extensional Viscosity of Coating Colors and its Relation With Jet Coating Performance
Appl. Rheol. 14:5 (2004) 240-250
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An orifice flowmeter was used to measure the extensional viscosity of several non-pigmented fluids and paper coating colors containing calcium carbonate as pigment in the context of a jet coating application. The orifice flowmeter was first calibrated in terms of a dimensionless Euler number versus Reynolds number curve with Newtonian fluids. The calibration curve was then used to determine the apparent extensional viscosity of coating colors. In the strain rate range investigated, all the fluids were found to exhibit strain-thinning and the Trouton ratio of the coating colors was in the range 5 to 20. Jet coating tests were also carried out in order to evaluate the effect of the extensional viscosity on the jet performance. The extensional viscosity was shown to be a key parameter determining the configuration of the downstream meniscus in the web contact region.
► Cite this publication as follows:
Arzate A, Ascanio G, Carreau PJ, Tanguy PA: Extensional Viscosity of Coating Colors and its Relation With Jet Coating Performance, Appl. Rheol. 14 (2004) 240.
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