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Pretreatment of Over-Dry Grey-Stage Lodgepole Pine Chips


April 1, 2010
By Pulp & Paper Canada

Prtraitement des copeaux surschs de pin de Murray l’tape de gris

Prtraitement des copeaux surschs de pin de Murray l’tape de gris

Abstract: Grey-stage lodgepole pine chips were dried under ambient conditions to 91% solids. Subsequent rewetting brought pilot TMP handsheet strength back close to the original level, but a small residual loss of strength should be expected. Enzymes did not seem to help. Sulphite or alkaline peroxide chip pretreatment significantly improved the strength properties at a given CSF, at the expense of higher specific energy, lower light scattering, and a few percentage points lower yield in the case of the alkaline peroxide. Practical implications are discussed.

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Paper presented at the 2009 PacWest Conference, in Sun Peaks, BC, April 10-13, 2009.

Keywords: GREY-STAGE, LODGEPOLE PINE, PILOT, TMP, DRY CHIPS, REWETTING, PRETREATMENT, STRENGTH, YIELD

Full manuscript available at www.paptac.ca.


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