Change search
ReferencesLink to record
Permanent link

Direct link
Predictions of Pulp and Paper Properties Based on Fiber Morphology
KTH, School of Chemical Science and Engineering (CHE).
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Prediktering av massa- och pappersegenskaper baserat på fibermorfologi (Swedish)
Abstract [en]

The aim is to investigate models that predicts the potential of pulp and evaluate the relevance of the zero-span tensile index within these. Two chemical pulps made from softwood and eucalyptus were refined in a Voith-beater with different energy input in order to study the change of fiber morphology signals and other pulp and paper properties. Chemical, THP pulp from Södra Värö is also used as an initial analysis for morphological connections to Zero-span tensile index.

The L&W Fiber Tester Plus is used in order to study the pulps fiber morphology and Pulmac 2000 for zero span. Handsheets are made for mechanical tests such as tensile properties, ZD-strength and optical properties.

Many of the given signals change according to clear patterns with increasing refining energy. Using least square methods, formulas describing the development with high adaptation could be formulated. Many of the measured aspects changes over already known patterns. These are then applied in the models.

Three possible models is tested: linear regression, Shear-Lag and Page. Of the three, only the two first ones where able to produce reliable models, whereas the third required data that was difficult to acquire at the same time as the adaptation was very low. The only model that use exclusively morphology data is linear regression.

Place, publisher, year, edition, pages
2015. , 36 p.
Keyword [en]
Pulp Refining, Tensile Index, Zero-span tensile index, Fiber Morphology, Linear Regression
National Category
Paper, Pulp and Fiber Technology
URN: urn:nbn:se:kth:diva-180550OAI: diva2:898813
Available from: 2016-01-29 Created: 2016-01-18 Last updated: 2016-01-29Bibliographically approved

Open Access in DiVA

fulltext(1016 kB)209 downloads
File information
File name FULLTEXT01.pdfFile size 1016 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
School of Chemical Science and Engineering (CHE)
Paper, Pulp and Fiber Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 209 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

Total: 336 hits
ReferencesLink to record
Permanent link

Direct link