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Moisture-induced surface roughness in TMP sheets
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik. (Mekaniskmassa)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik. (Mekaniskmassa)
2008 (engelsk)Inngår i: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 34, nr 3, s. 139-146Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The present study evaluates effects of moisture on sheet properties made different Bauer-McNett fractions from TMP, both individually and in combinations. It is well known that the coarse, stiff, long fibre fractions cause surface roughness in dry sheets. However, this study indicates that these fibres remain relatively unchanged when moisture diffuses into the sheet structure, i.e., the degree of decollapse is low. The fibres from the middle fraction rise easily, causing the greatest change in surface roughness when moisture is added to the sheet. Sheets including both coarse fibres and fibres from the middle fractions display the highest surface roughness values at a high moisture content. The trials also indicate that fines contribute to increased surface roughness: when the degree of bonding in the sheet structure is increased, there is a risk that the whole structure or the flocks, instead of the individual fibres, may swell.

sted, utgiver, år, opplag, sider
2008. Vol. 34, nr 3, s. 139-146
Emneord [en]
TMP, Reject refining, surface roughness, moisture
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-8392ISI: 000264027300001Scopus ID: 2-s2.0-60649112852OAI: oai:DiVA.org:miun-8392DiVA, id: diva2:134502
Tilgjengelig fra: 2009-01-21 Laget: 2009-01-21 Sist oppdatert: 2017-12-14bibliografisk kontrollert
Inngår i avhandling
1. Effects of Reject Refining at High Temperature on TMP Fibre Properties
Åpne denne publikasjonen i ny fane eller vindu >>Effects of Reject Refining at High Temperature on TMP Fibre Properties
2008 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Sundsvall: Mid Sweden University, 2008. s. 79
Serie
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 64
Emneord
Fibre collapse, fibre decollapse, high temperature, refining, reject, roughening, bonding, acoustic emission, mechanical pulping, softening temperature, bond strength
HSV kategori
Identifikatorer
urn:nbn:se:miun:diva-8397 (URN)978-91-86073-17-6 (ISBN)
Disputas
2008-11-28, M108, Sundsvall, 10:00 (svensk)
Opponent
Veileder
Tilgjengelig fra: 2009-01-22 Laget: 2009-01-21 Sist oppdatert: 2009-01-22

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Norgren, SvenHöglund, Hans

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