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A pilot web former designed to study retention-formation relationships
2010 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 25, no 2, 185-194 p.Article in journal (Refereed) Published
Abstract [en]

A pilot-scale fourdrinier former has been developed for the purpose of investigating the relationship between retention and paper formation (features, retention aids, dosage points, etc.). The main objective of this publication was to present the R-F (Retention and formation)-machine and demonstrate some of its fields of applications. For a fine paper stock (90% hardwood and 10% softwood) with addition of 25% Filler (based on total solids content), the relationship between retention and formation was investigated for a microparticulate retention aid (cationic polyacrylamide together with anionic montmorillonite clay). The retention-formation relationship of the retention aid system was investigated after choosing standardized machine operating conditions (e.g. the jet-to-wire speed ratio). As expected, the formation was impaired when the retention was increased. Since good reproducibility was attained, the R-F (Retention and formation)-machine was found to be a useful tool for studying the relationship between retention and paper formation.

Place, publisher, year, edition, pages
2010. Vol. 25, no 2, 185-194 p.
Keyword [en]
Flocculation, Formation, Fourdrinier former, Kraft pulp, Pilot study, Polyacrylamide, Retention, Retention agent
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-96256ISI: 000279341100007OAI: oai:DiVA.org:kth-96256DiVA: diva2:529890
Note
QC 20120530Available from: 2012-05-31 Created: 2012-05-31 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Improvement of the retention-fromation relationship using three-component retention aid systems
Open this publication in new window or tab >>Improvement of the retention-fromation relationship using three-component retention aid systems
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. 62 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2012:19
Keyword
Dewatering, drag reduction, fibre flocculation, filler retention, fine paper, flow imaging, flow loop, formation aid, kraft pulp, magnetic resonance imaging, MRI, paper formation, pilot web former, pressure drop, retention aid, turbulence damping
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-96259 (URN)978-91-7501-314-5 (ISBN)
Public defence
2012-06-08, K1, Teknikringen 56, KTH, Stockholm, 13:00 (English)
Opponent
Supervisors
Note
QC 20120530Available from: 2012-05-31 Created: 2012-05-31 Last updated: 2012-05-31Bibliographically approved

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Citation style
  • apa
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  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • nn-NB
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  • Other locale
More languages
Output format
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  • text
  • asciidoc
  • rtf