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Enhancing Papermaking Properties Of Secondary Fibres By Tempo-Mediated Oxidation


February 1, 2010
By Pulp & Paper Canada

Oxydation par TEMPO afin d’ameliorer les proprits des fibres secondaires lors de la fabrication

Oxydation par TEMPO afin d’ameliorer les proprits des fibres secondaires lors de la fabrication

Abstract: A bleached virgin hardwood kraft pulp was refined and recycled one time in laboratory. Recycled samples were then oxidized using TEMPO (4-acetamido-2,2,6,6-tetramethylpi- peridine-1-oxyl radical), sodium bromide and sodium hypochlo- rite, with variation of the latter’s concentration on each sample. Results showed that all papermaking properties, particularly the tear index, were significantly improved at low NaOCl concen- trations. At higher NaOCl charges the burst and tensile indices suffered little decrease, while the tear was strongly reduced.

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Paper presented at the 95th PAPTAC Annual Meeting 2009 in Montreal, Que., February 3-4, 2009.

Keywords: RECYCLED FIBRES, TEMPO-MEDIATED OXIDATION, STRENGTH PROPERTIES, KRAFT PULP

Full manuscript available at www.paptac.ca.


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