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Halbzellstoffe nach dem NSSC-Verfahren aus Pappelholz

WKI-Mitteilung 497/1989.
: Dix, B.; Roffael, E.

Holz als Roh- und Werkstoff 47 (1989), S.437-445
ISSN: 0018-3768
Fraunhofer WKI ()
age; Alter; clone; Halbzellstoff-Neutral-Sulfit-Verfahren; Klon; neutral-sulfite-semi-chemical pulp; NSSC; Pappelholz; poplar wood; site; Standort

Semi-chemical pulps from poplar wood of different clones, sites and ages were prepared according to the NSSC-method. The results reveal: Poplar semi-chemical pulps show higher strength properties than industrial as well as laboratory made NSSC-pulps from beech wood. However, the pulping conditions have to be optimized for every clone. Under used pulping conditions semi-chemical pulps from the clone "Scott Pauley" were of lower strength properties compared to those of other clones. The results show clearly that for the build-up of the strength properties the site is by far more important than the age of the trees used for pulping. Semi-chemical pulps obtained from different height levels show wide differences in their mechanical properties. Bark content up to 15 % has no significant influence on the mechanical properties of NSSC-pulps from poplar wood but on their yield.