A1 Journal article (refereed)
Behavior of Decayed Spruce (Picea abies) during Kraft Pulping (2020)


Halonen, M., & Alen, R. (2020). Behavior of Decayed Spruce (Picea abies) during Kraft Pulping. Paper and Biomaterials, 5(4). https://doi.org/10.12103/j.issn.2096-2355.2020.04.001


JYU authors or editors


Publication details

All authors or editorsHalonen, Markku; Alen, Raimo

Journal or seriesPaper and Biomaterials

ISSN2096-2355

Publication year2020

Volume5

Issue number4

PublisherPaper and Biomaterials Editorial Board

Publication countryChina

Publication languageEnglish

DOIhttps://doi.org/10.12103/j.issn.2096-2355.2020.04.001

Publication open accessNot open

Publication channel open access


Abstract

This study indicated that by applying an improved classification system to decayed large-diameter Norway spruce (Picea abies) wood, its use as raw material for kraft pulping without loss of pulp quality could be essentially increased. This is based on the fact that although the cooking yield of decayed spruce material which has been sorted according to these new recommendations is somewhat lower and Kappa number higher than those of sound wood material, the greatest part of the decayed stem (the outer part of the stem) contains long-fiber wood material which produces pulp of good quality. Therefore, large-diameter spruce logs can also be separately used, for example, in the manufacture of reinforcement pulp.


Keywordspulpingraw materialsNorway sprucedecay (matter)decayed wood

Free keywordskraft pulping; wood decay; fungal decay; softrot


Contributing organizations


Ministry reportingYes

Reporting Year2020

JUFO rating0


Last updated on 2024-11-03 at 14:28