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Non-destructive high resolution measurements of spatial filler content distribution in paper
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.ORCID-id: 0000-0002-0529-1009
2013 (engelsk)Inngår i: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 28, nr 1, s. 131-136Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this work, a non-destructive method is presented that enables the measurement of filler content in paper with high spatial resolution. The method uses an X-ray fluorescence setup that enables high resolution measurements of calcium content in the paper, together with a beta radiography measurement method, to assess the local filler content in the paper. An image registration method is used to combine the two measurement maps, and a calibration polynomial is applied to the point-wise values in order to calculate the local filler content. The measurement methods show good accuracy. The grammage and the calcium content can be measured at a spatial resolution of 0.1 mm × 0.1 mm but the resolution for the filler content map was in this work chosen to 1 mm × 1 mm in order to minimize image registration errors. The method is illustrated using two paper samples, a laboratory paper and a commercial 80 g/m2 copy paper. From the methods used in this work, a difference is shown between the two paper samples in how the filler content distribution is related to the paper formation. With the help of image registration, point-wise measurements of filler content from both sides of the samples can be compared. The method can be used together with other high resolution measurements in order to analyze the simultaneous interrelation between different paper properties. The high resolution measurements of filler content will be particularly valuable for the analysis of the underlying causes to optical variations in paper and print.

sted, utgiver, år, opplag, sider
2013. Vol. 28, nr 1, s. 131-136
Emneord [en]
Filler content; Grammage; High resolution; Image registration; Paper properties; Point-wise; Spatial; Variations
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Identifikatorer
URN: urn:nbn:se:miun:diva-18128DOI: 10.3183/NPPRJ-2013-28-01-p131-136ISI: 000321291500014Scopus ID: 2-s2.0-84877255003OAI: oai:DiVA.org:miun-18128DiVA, id: diva2:582777
Tilgjengelig fra: 2013-01-07 Laget: 2013-01-07 Sist oppdatert: 2017-12-06bibliografisk kontrollert
Inngår i avhandling
1. Local optical variations in paper: measurements and analysis
Åpne denne publikasjonen i ny fane eller vindu >>Local optical variations in paper: measurements and analysis
2012 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Sundsvall: Mid Sweden University, 2012. s. 22
Serie
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 90
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Identifikatorer
urn:nbn:se:miun:diva-18130 (URN)978-91-87103-37-7 (ISBN)
Tilgjengelig fra: 2013-01-07 Laget: 2013-01-07 Sist oppdatert: 2013-01-07bibliografisk kontrollert

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