Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effect of softwood kraft fiber coarseness on formation and strength efficiency in twin-wire roll forming
SCA R&D Sundsvall, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy.
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669Article in journal (Refereed) In press
Abstract [en]

It has been unclear how fiber coarseness affect formation and the utilization of furnish strength in the machine-made paper (strength efficiency). In this work, the effect of softwood kraft fiber coarseness on formation and strength efficiency in twin-wire roll forming was examined in a pilot machine investigation. A reduction in softwood kraft fiber coarseness from 0.21 to 0.17 mg/m, associated with a reduction in fiber grammage from 6.2 to 5.2 g/m2, was found to have no significant effect on formation at the point of minimum shear during dewatering. The insignificant effect of reduced coarseness can be interpreted as the net result of two effects, namely, an increase in the number of fiber layers at a given grammage (favorable) and an increase in the flocculation tendency (unfavorable). While the effect of coarseness was negligible at the point of minimum shear, coarser fibers enabled larger improvement in formation through the jet-to-wire speed difference. In correspondence to the insignificant effect on formation, fiber coarseness had a negligible effect on tensile strength efficiency and Z-strength at the point of minimum shear. The larger improvement in formation through the jet-to-wire speed difference for the coarser fibers was reflected in a favorable effect on Z-strength efficiency.

Place, publisher, year, edition, pages
2018.
Keywords [en]
fiber coarseness, fiber length, formation, jet to wire speed difference, kraft pulps, tensile strength, twin wire machines, Z direction strength, Efficiency, Fibers, Kraft pulp, Shear flow, Shearing machines, Softwoods, Wire, Wire machines, Wire speed, Z-directions
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33964DOI: 10.1515/npprj-2018-3029Scopus ID: 2-s2.0-85048803935OAI: oai:DiVA.org:ri-33964DiVA, id: diva2:1230001
Available from: 2018-07-02 Created: 2018-07-02 Last updated: 2018-07-02Bibliographically approved

Open Access in DiVA

fulltext(295 kB)2 downloads
File information
File name FULLTEXT01.pdfFile size 295 kBChecksum SHA-512
709bdfc40cbdc6a0ff31a565ea13c99c7a2786e73a3a4ec2d943acb8525d1d76f4ee4fc33f861cd4adb6ee8e88f4df3d4b36c0c0dacf009062b343e707862842
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus
By organisation
Bioeconomy
In the same journal
Nordic Pulp & Paper Research Journal
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 2 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 8 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf