Effect of compressive and abrasive refining on structural changes in fiber and paper properties

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Hiltunen, Eero
dc.contributor.author Setasith, Suchart
dc.date.accessioned 2014-06-25T08:26:30Z
dc.date.available 2014-06-25T08:26:30Z
dc.date.issued 2014-06-03
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/13458
dc.description.abstract The objective of this master’s thesis is to explain the differences in refining action and refining results between compressive and fibrillating refining types. Another aim of this work is to find out the relationship between structural changes in fiber and paper properties. Softwood pulp samples were refined by Voith LR40, Lampén mill and MASUKO Super Masscolloider. Then fiber structural changes resulting from refining were investigated. External fibrillation, fiber curl and fines were evaluated by Kajaani fiber analyzer apparatus. Internal fibrillation was evaluated according to the degree of Fiber saturation point (FSP). Other fiber and pulp properties were also studied including water retention vale (WRV), Schopper-Riegler (SR), and Zero-span breaking strength. After that effect of refining action on structural changes was determined. Paper properties were then examined which consist of strength, optical, structural and surface properties. Finally, the relationship between structural changes in fiber and paper properties was analyzed. The study found that Lampén refining, representing compressive refining, highly promote external fibrillation, internal fibrillation, fiber straightening and somewhat shorten fibers. On the other hand, Voith refining, representing combination of abrasive and compressive refining, was found to highly promote external fibrillation, fiber straightening but moderately fiber shortening and develop internal fibrillation. Furthermore, internal fibrillation was found to largely promote most of paper strength properties and have a moderate impact on surface and structural properties while external fibrillation and fine greatly affect structural and surface properties. en
dc.format.extent 81
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Effect of compressive and abrasive refining on structural changes in fiber and paper properties en
dc.type G2 Pro gradu, diplomityö en
dc.contributor.school Kemian tekniikan korkeakoulu fi
dc.subject.keyword compressive refining en
dc.subject.keyword abrasive refining en
dc.subject.keyword structural changes in fiber en
dc.subject.keyword internal fibrillation en
dc.subject.keyword external fibrillation en
dc.subject.keyword Lampén mill en
dc.subject.keyword Voith LR40 en
dc.subject.keyword MASUKO Super Masscolloider en
dc.subject.keyword fiber properties en
dc.subject.keyword paper properties en
dc.identifier.urn URN:NBN:fi:aalto-201406252190
dc.programme.major Fibre Products Technology fi
dc.programme.mcode KM3003 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Paltakari, Jouni
dc.programme Master's Programme in Bioproduct Technology fi
dc.location PK fi


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