The relationship between hygroexpansion, tensile stiffness, and mechano–sorptive creep in bleached hardwood kraft pulps

QC 20100629
cited By 0
Hygroexpansion coefficient and tensile stiffness are important parameters in many paper applications. This study compares several bleached industrial hardwood kraft pulps, comprising five eucalypt pulps from South America, Europe, and Africa as well as an acacia pulp from Asia and a birch pulp from Scandinavia. Refined and unrefined pulps are compared. The results indicate significant differences in hygroexpansion but smaller differences in tensile stiffness index at comparable densities. No single factor offering a reasonable explanation of these differences in hygroexpansion coefficient, such as carbohydrate composition, fibre dimensions, or fibre form, was found. However, correlation between hygroexpansion coefficient and the mechano-sorptive creep stiffness was observed. We suggest that the hygroexpansion coefficient at a given tensile stiffness level can be used to rank pulps in terms of their mechano-sorptive creep properties.

TEKNIK OCH TEKNOLOGIER Materialteknik Pappers-, massa- och fiberteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Paper, Pulp and Fiber Technology hsv//eng
Mechano–sorptive creep
hygroexpansion
dimensional stability
eucalypt
birch
acacia
Cellulose and paper engineering
Cellulosa- och pappersteknik

Pulkkinen, IiroChemical Engineering, Department of Biotechnology and Chemical Technology, Helsinki University of Technology (TKK), Espoo, Finland (author)
Fiskari, JuhaMetsä-Botnia, Joutseno Mill, Lappeenranta, Finland (author)
Karlström, Katarina,1963-RISE,KTH,Träkemi och massateknologi,Innventia(Swepub:kth)u1k2i05t (author)
Lindström, Mikael E.KTH,Träkemi och massateknologi(Swepub:kth)u1uxn4q9 (author)
KTHTräkemi och massateknologi (creator_code:org_t)

By the author/editor: Antonsson, Stefa ...; Pulkkinen, Iiro; Fiskari, Juha; Karlström, Katar ...; Lindström, Mikae ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

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