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Title
Kraft pulping and bleaching from Paulownia SUN TZU 104® wood
Authors
M. J. FERIA J. C. GARCIA M. A. M. ZAMUDIO J. L. GOMIDE J. L. COLODETTE and F. LOPEZ
Received
August 2, 2012
Published
Volume 47 Issue 7-8 July-August
Keywords
Kraft pulp, Paulownia, paper, pulp, bleaching
Abstract
A trihybrid clone of Paulownia from the varieties fortunei x tormentosa x elongate was used for obtaining cellulosic
pulp and paper by a kraft process and bleaching. Both bleached and unbleached pulps were subjected to a refining
study between 0 and 3000 revolutions in a PFI mill. A fiber length (0.97 mm) similar to that of Eucalyptus, a high
holocellulose content (71.4%), a low ash content (0.9%), a lignin content comparable to that of other varieties of
Paulownia and an α-cellulose content slightly lower than that of Eucalyptus, but greater than that of other varieties of
Paulownia were observed. Also, paper sheets showed good strength properties, comparable to or even greater than
those obtained with Eucalyptus or other varieties of Paulownia at comparable refining degrees, between 30 and 40 ºSR.
The pulp was successfully bleached in all cases with a value of brightness >90%.
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