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Fibre and fines quality development in pilot scale high and low consistency refining of ATMP
Norske Skog Saugbrugs, Norway.
RISE, Innventia, PFI – Paper and Fiber Research Institute.ORCID iD: 0000-0002-5030-7954
University of British Columbia, Canada.
Andritz Inc., USA.
2012 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 27, p. 872-881Article in journal (Refereed) Published
Abstract [en]

The objective of this study was to characterise and compare the development of fibre and fines properties in high consistency (HC) and low consistency (LC) refining of mechanical pulp. Primary refined pulp was produced using the Advanced Thermo-Mechanical Pulp (ATMP) refining process. Pulps were characterized to evaluate external and internal fibrillation, fibre shape and dimensions, surface area of fines and the proportion of split fibres. Based on the results, a different mode of fibre development was proposed for LC and HC refining. The LC refining resulted in a greater reduction in the shives content and R30 Bauer-McNett fibre fraction. The reduced R30 fraction considerably increased the middle fibre fractions; however it showed no further development in terms of surface fibrillation. While HC refining resulted in a significant reduction in fibre wall thickness associated with fibre collapse and increase in external fibrillation, LC refining mainly generated structural changes, seen in fibre straightening and increased flexibility. The HC and LC refined pulps had different property profiles compared at equal handsheet tensile index. The LC refined pulps contained less long fibres and fines but significantly more middle fraction particles. Extensive internal fibrillation of the straighter LC refined fibres appeared to have compensated for lower fines content and external fibrillation, producing well bonded sheets with good tensile strength.

Place, publisher, year, edition, pages
2012. Vol. 27, p. 872-881
Keywords [en]
ATMP, Energy efficiency, Fibre characterization, Fibre development, High-consistency refining, Low-consistency refining
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-9602DOI: 10.3183/NPPRJ-2012-27-05-p872-881Scopus ID: 2-s2.0-84871807673OAI: oai:DiVA.org:ri-9602DiVA, id: diva2:968355
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2021-01-05Bibliographically approved

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Mörseburg, Kathrin

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