INFRARED MEASUREMENT OF PAPER MACHINE CLOTHING CONDITION

Infrared spectroscopy techniques are employed to measure (i) the moisture level in both the sheet of wet stock and the papermaking machine clothing on which the sheet is supported and (ii) the moisture level in the clothing alone as a separate layer of material. Differential measurement thus yields...

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Bibliographische Detailangaben
Hauptverfasser:	HARAN, FRANK M, MACHATTIE, ROSS K
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METHODS OF PRODUCING PAPER THEREON PAPER-MAKING PAPER-MAKING MACHINES PHYSICS PRODUCTION OF CELLULOSE TESTING TEXTILES
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Beschreibung
Zusammenfassung:	Infrared spectroscopy techniques are employed to measure (i) the moisture level in both the sheet of wet stock and the papermaking machine clothing on which the sheet is supported and (ii) the moisture level in the clothing alone as a separate layer of material. Differential measurement thus yields the moisture content of the sheet of wet stock alone. Changes in the moisture level in the clothing at the press section can be correlated with corresponding changes in the quality or physical property of the paper produced. Both fixed point and scanning IR sensors are strategically positioned in the press section to generate machine direction and/or cross machine direction water profiles for process control.