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Effect of fiber length on formation and strength efficiency in twin-wire roll forming
SCA R&D Centre, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy.
2017 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, no 1, 119-125 p.Article in journal (Refereed) Published
Abstract [en]

A change in fiber length is known to change fiber flocculation and formation of machine-made paper, but it has been unclear how a change in formation through fiber length affects strength efficiency. (The strength efficiency reflects how well the furnish strength, as indicated by the handsheet strength, is utilized in the machine-made paper.) The effect of fiber length on strength efficiency in twin-wire roll forming was presently investigated by examining two furnishes with different average fiber length, prepared from the same batch of softwood kraft pulp, over a wide range of headbox consistencies on a pilot machine. An increase in fiber length resulted not only in worse Ambertec formation over the whole range of headbox consistencies but also in faster relative deterioration of the formation with increasing consistency. Tensile strength efficiency and Z-strength efficiency were both reduced when the formation was impaired through increased fiber length, and the effect was similar to the effect of a corresponding change in formation through headbox consistency. A given change in formation, through fiber length or headbox consistency, had a larger relative effect on Z-strength efficiency than on tensile strength efficiency.

Place, publisher, year, edition, pages
2017. Vol. 32, no 1, 119-125 p.
Keyword [en]
consistency, fiber length, formation, kraft pulp, tensile strength, twin wire machine, z-direction strength
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-30339DOI: 10.3183/NPPRJ-2017-32-01-p119-125Scopus ID: 2-s2.0-85016429341OAI: oai:DiVA.org:ri-30339DiVA: diva2:1134255
Available from: 2017-08-18 Created: 2017-08-18 Last updated: 2017-10-06Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
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  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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