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Development of fibre properties in mill scale: High-and low consistency refining of thermomechanical pulp (part 2)-Importance of fibre curl
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).
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2024 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 39, no 4, p. 575-585Article in journal (Refereed) Published
Abstract [en]

Increased knowledge on the correlation between pulp processing, fibre-properties and paper properties is required to improve fibre-based products. Part 1 of this investigation deals with the effects of HC and LC refining on fibre properties development. LC refining reduced curl and increased tensile index in a manner similar to hot disintegration whereas HC refining increased curl slightly. In this second part, the correlation between fibre curl and handsheet properties of thermomechanical pulp, subjected to low consistency (LC) refining and hot/cold disintegration is examined. Fibre curl decreased by laboratory disintegration and LC refining and showed a linear correlation with increased tensile index and tensile stiffness. Evaluation of fibre property distributions gave a more detailed description of the development of fibre properties. These revealed that disintegration and LC refining gave different fibre curl versus fibre length distributions, even when their average values were similar. These results confirm that analysing fibre property distributions contributes to a more detailed knowledge of the development of pulp quality. Hot disintegration before laboratory testing exaggerated pulp quality and increase internal fibrillation and can therefore be questioned. When hot disintegration is performed before pulp analyses, the impact of LC refining on paper properties may be misjudged. 

Place, publisher, year, edition, pages
Walter de Gruyter GmbH , 2024. Vol. 39, no 4, p. 575-585
Keywords [en]
fibre curl, fibre properties, HCLC refining, mill scale, thermomechanical pulp
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-52680DOI: 10.1515/npprj-2024-0049ISI: 001314606700001Scopus ID: 2-s2.0-85204787700OAI: oai:DiVA.org:miun-52680DiVA, id: diva2:1902069
Available from: 2024-10-01 Created: 2024-10-01 Last updated: 2025-09-25Bibliographically approved

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Ferritsius, RitaFerritsius, OlofEngberg, Birgitta A.Nilsson, Fritjof

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Ferritsius, RitaFerritsius, OlofEngberg, Birgitta A.Nilsson, Fritjof
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Department of Engineering, Mathematics, and Science Education (2023-)
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Nordic Pulp & Paper Research Journal
Paper, Pulp and Fiber Technology

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