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Study of the influence of charges on refinability of bleached softwood kraft pulp
RISE, Innventia.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
2013 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 28, no 4, p. 588-595Article in journal (Refereed) Published
Abstract [en]

To investigate how the number of charged groups affects the refinability of pulp, different levels of fibre charge were introduced to fully bleached softwood kraft pulp by bulk carboxymethylation. The chemical compositions of the fibres thus remained similar and the effect of the charge could be evaluated. The pulps were refined in a PFI-mill. The introduction of additional charges clearly resulted in a higher refinability in terms of a higher WRV for a given energy input. However, the increase in swellability was not accompanied by a corresponding increase in tensile index. The highly charged pulps suffered severe damage to the fibre wall during refining, showing that the combination of high charge levels and mechanical forces cause destruction of the fibre wall, which inhibits paper strength development. 

Place, publisher, year, edition, pages
2013. Vol. 28, no 4, p. 588-595
Keywords [en]
Bleached softwood kraft pulp, Carboxymethylation, Refinability, Tensile strength, WRV, Charged groups, Chemical compositions, Mechanical force, Paper strengths, Fibers, Kraft pulp, Pulp refining, Bleached Pulps, Kraft Pulps, Refining, Softwood Pulps
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41598Scopus ID: 2-s2.0-84891842664OAI: oai:DiVA.org:ri-41598DiVA, id: diva2:1377681
Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2019-12-12Bibliographically approved

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