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Effects of refining energy, pH and different types of fibers on the strength of paper
Karlstad University, Faculty of Technology and Science.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
Abstract [en]

This report is the result of an examination work at Karlstad University. This thesis was performed in cooperation with Billerud Gruvön. The purpose of this project was to investigate how refining energy, pH and different types of fibers affect the strength of the final paper. A laboratory study was performed where softwood and hardwood unbeaten pulps and broke had their pH adjusted after disintegration and then they were refined with different energy inputs in a laboratory pulp refiner. Mixtures containing softwood and broke or hardwood and broke were prepared to produce hand sheets. As reference, refined pulp and broke from Billerud Gruvön were taken and hand sheets were also produced. The results indicate that it is possible to affect the strength properties of paper by varying pH, different types of fibers and energy input in the refiner.

Abstract [sv]

Denna rapport är ett resultat av ett examensarbete utfört på Karlstads universitet. Arbetet utfördes i samarbete med Billerud Gruvöns bruk. Syftet med detta projekt var att undersöka hur malenergi, pH och olika typer av fiber påverkar styrkan på pappret. Barr- och lövvedsmassa samt utskott maldes till olika malningsgrader med malningsutrustning i laboratorieskala efter att massorna justerats till olika pH nivåer vid uppslagningen. Ark bereddes av blandningar av barrvedsmassa och utskott samt lövvedsmassa och utskott. Fabriksmald massa och utskott från Billerud Gruvöns bruk användes för referensark. Resultaten indikerar att papprets styrkeegenskaper kan påverkas av pH, olika fibertyper och malenergin.

Place, publisher, year, edition, pages
2011. , 52 p.
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kau:diva-7882Local ID: E1-KEM 31Archive number: E1-KEM 31OAI: oai:DiVA.org:kau-7882DiVA: diva2:428357
Subject / course
Chemical Engineering, Master of Science
Presentation
2011-06-10, 9E126, Karlstad, 10:15 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-08-12 Created: 2011-06-30 Last updated: 2015-10-29Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • 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