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Characterisation of fines from unbleached kraft pulps and their impact on sheet properties
RISE, STFI-Packforsk.
RISE, STFI-Packforsk.
RISE, STFI-Packforsk.
2008 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 62, no 5, 546-552 p.Article in journal (Refereed) Published
Abstract [en]

Fines are an essential component in the papermaking process because they have a profound influence on the behaviour of the wet web and on the mechanical properties of the final sheet. Primary fines are present in the pulp prior to refining, and secondary fines are produced during refining. In the present investigation, two commercially manufactured unbleached pulps with kappa numbers of 45 and 90 were studied in terms of how they responded to refining with respect to the quality of fibre and fines. Primary and secondary fines were collected and characterised and their impact on sheet strength was evaluated by addition of known amounts to a refined and decrilled pulp. All the measured paper strength properties improved when primary and secondary fines were added. The strength improvement was generally somewhat higher in the second case. The effect was more pronounced at a higher level of addition. We attribute the main strength improvements associated with fines to improved consolidation by the creation of capillary forces between the surfaces.

Place, publisher, year, edition, pages
2008. Vol. 62, no 5, 546-552 p.
Keyword [en]
Charged groups, Fines, Kraft pulp, Mechanical properties, Refining
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-29686DOI: 10.1515/HF.2008.081Scopus ID: 2-s2.0-48649104878OAI: oai:DiVA.org:ri-29686DiVA: diva2:1099030
Note

cited By 10

Available from: 2017-05-29 Created: 2017-05-29 Last updated: 2017-05-29Bibliographically approved

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