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The Efficiency of Softwood Kraft Pulps in Improving Paper Machine Runnability


June 1, 2010
By Pulp & Paper Canada

Effets des ptes kraft de rsineux sur l’amlioration de l’aptitude au passage sur machine

Effets des ptes kraft de rsineux sur l’amlioration de l’aptitude au passage sur machine

Abstract: A method for assessment of the reinforcing properties softwood kraft pulps used to improve fine paper machine runnability was developed. The assessment is based on wet-web tensile strength, stretch, tensile energy absorption, and failure envelopes of handsheets, made from the softwood pulp alone and its blend with hardwood, combined with the evaluation of water removal characteristics of pulps. Considerable differences were found in the reinforcement potential of the three pulps. Conventional measurement of “pulp strength” or refining curve did not reveal its reinforcing properties.

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

Keywords: FIBRE LENGTH, HARDWOOD, KRAFT PULP, PAPER MACHINES, EFFICIENCY, RUNNABILITY, PULP PROPERTIES, QUALITY, REFINING, ENERGY, REINFORCEMENT, SOFTWOOD, STRETCH, TENSILE STRENHGTH, RUPTURE WORK, WATER RETENTION, WATER REMOVAL, WET BREAKS, WET WEBS

Full manuscript available at www.paptac.ca.


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