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Measurements Of Pressure Pulses From Blades In A Gap Former


February 1, 2010
By Pulp & Paper Canada

Dtermination des impulsions de pression des lames dans un formeur double toile

Dtermination des impulsions de pression des lames dans un formeur double toile

Abstract: Blades in a gap former induce pressure pulses on the passing fibre mat causing drainage and redistribution of fines and fibres. Pressure pulse measurements were made on a pilot paper machine for various wrap angles, blade shapes and fabric tensions. A typical pulse form had one pulse upstream of the blade and another over the blade with the magnitude of each depending on wrap angle, which is consistent with theory. Knowledge of these pulse forms is a useful first step to enhanc- ing paper quality.

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Paper presented at the 90th PAPTAC Annual Meeting in Montreal, Que., January 26-29, 2004.

Keywords: GAP FORMER, PRESSURE PULSES, FORM- ING BLADE, WRAP ANGLE.

Full manuscript available at www.paptac.ca.


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