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Heterogeneity of Thermomechanical and Chemi-thermo-mechanical Pulps Described with Distributions of an Independent Common Bonding Factor on Particle Level
Dalarna University, Verksamhetsstödet.ORCID iD: 0000-0002-7674-8862
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2022 (English)In: BioResources, E-ISSN 1930-2126, Vol. 17, no 1, p. 763-784Article in journal (Refereed) Published
Abstract [en]

Particles in mechanical pulp show a wide variety but are commonly described using averages and/or collective properties. The authors suggest using distributions of a common bonding factor, BIND (Bonding INDicator), for each particle. The BIND-distribution is based on factor analysis of particle diameter, wall thickness, and external fibrillation of several mechanical pulps measured in an optical analyser. A characteristic BIND-distribution is set in the primary refiner, depending on both wood and process conditions, and remains almost intact along the process. Double-disc refiners gave flatter distributions and lower amounts of fibres with extreme values than single-disc refiners. More refining increased the differences between fibres with low and high BIND. Hence, it is more difficult to develop fibres with lower BIND. Examples are given of how BIND-distributions may be used to assess energy efficiency, fractionation efficiency, and influence of raw material. Mill scale operations were studied for printing-grade thermomechanical pulp (TMP), and board-grade chemi-thermomechanical pulp (CTMP), both from spruce.

Place, publisher, year, edition, pages
2022. Vol. 17, no 1, p. 763-784
Keywords [en]
Heterogeneity; Distributions; Spruce; TMP; CTMP; Wood fibres; Fibre analyser; Fibre bonding; External fibre fibrillation; Fibre wall thickness
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:du-39401DOI: 10.15376/biores.17.1.763-784ISI: 000760918300002Scopus ID: 2-s2.0-85137275487OAI: oai:DiVA.org:du-39401DiVA, id: diva2:1635998
Available from: 2022-02-08 Created: 2022-02-08 Last updated: 2024-07-04Bibliographically approved

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Reyier Österling, Sofia

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • chicago-author-date
  • chicago-note-bibliography
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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