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Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.). Graz Univ Technol, CD Lab Fiber Swelling & Paper Performance, Inffeldgasse 23, A-8010 Graz, Austria.ORCID iD: 0000-0002-5112-1289
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.). Graz Univ Technol, CD Lab Fiber Swelling & Paper Performance, Inffeldgasse 23, A-8010 Graz, Austria.ORCID iD: 0000-0003-3611-2250
2019 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 26, no 6, p. 4099-4124Article in journal (Refereed) Published
Abstract [en]

Refining (i.e., mechanical beating of pulp) is a common procedure that is used in paper-making to improve the mechanical properties of the final product. The improvements caused by refining are mainly attributed to increased density and to a better bonding between fibers. In this work, we study how various mechanisms that can be triggered by refining affect the tensile behavior of the sheets. Consequently, we use direct numerical simulations of fiber networks. We relate our finding to the experimental measurements that we conducted on handsheets. We have found that fibrillar fines with size distributions below the resolution of modern state-of-the art pulp characterization tools have a substantial contribution to the increased strength and stiffness of the sheets.

Place, publisher, year, edition, pages
SPRINGER , 2019. Vol. 26, no 6, p. 4099-4124
Keywords [en]
Refining, Beating, PFI, Strength, Stiffness, Fines, Densification, Fiber network, Simulation
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-251332DOI: 10.1007/s10570-019-02349-5ISI: 000464849500033Scopus ID: 2-s2.0-85062974803OAI: oai:DiVA.org:kth-251332DiVA, id: diva2:1317613
Conference
ARK JD, 1969, TAPPI, V52, P335
Note

QC 20190523

Available from: 2019-05-23 Created: 2019-05-23 Last updated: 2020-01-06Bibliographically approved

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Motamedian, Hamid RezaKulachenko, Artem

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