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J.P. Fauré
Laboratoire de Mécanique
P. Pluvinage
Papeteries de Condat
J. Pouyet
This paper summarizes a comprehensive investigation of blade coating technology through a theoretical model as well as through experimental trials on pilot and mill coaters. More precisely, it deals with low-angle bent blade coating process and focuses on machine runnability and efficiency for high solids contents coating colors. In a low-angle bent blade configuration, Papermakers meet with some difficulties to put down a predetermined coat weight on the paper surface. Besides, as a result of blade wearing, this process shows some problems with coat weight stability as time passes and exhibits poor coater runnability. This study outlines a blade model and specifies the two main blade parameters : the load applied by the blade on the backing-roll and the blade tip angle. Hence, a constant blade tip angle coating process is defined leading to an increase in the machine runnability and the coat weight control.
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Optimization of Mill Coater for a Low-Angle Bent Blade Coating Process, 1995 Coating Conference Proc