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Stiffness and strength properties of five paperboards and their moisture dependency
RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging.
RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging.ORCID iD: 0000-0002-9689-5966
KTH Royal Institute of Sweden, Sweden.
2019 (English)In: International Paper Physics Conference 2019, Indianapolis, IN, USA, 5-8 May 2019: preprint proceedings, TAPPI Press, 2019, p. 14-29Conference paper, Published paper (Other academic)
Abstract [en]

Research has been undertaken to characterise the in-plane and out-of-plane stiffness and strength properties of paperboards to enable data for use in determining constitutive parameters needed in finite element simulations. Paperboards with different bending stiffness were analysed, using five folding box boards of varying grammage (235, 255, 270, 315 and 340gsm). The stiffness and strength properties were determined at different relative humidity (RH), namely, 20, 50, 70 and 90%. As well as in-plane tensile test and out-of-plane tensile test, the short-span compression test (SCT) was carried out, together with bending stiffness test and double-notch shear test. The results revealed a linear relation between mechanical properties and moisture ratio for each paperboard. When the data were normalised with data for the standard climate (50% RH) and investigated as a function of moisture ratio, it was determined that the normalised mechanical properties for all paperboards coincided along one single line. Thus they could be expressed as a linear function of moisture ratio and two constants. It has been concluded that by knowing the structural properties for the preferred level of RH and the mechanical property for the standard climate, the mechanical properties of a paperboard could be obtained.

Place, publisher, year, edition, pages
TAPPI Press, 2019. p. 14-29
Keywords [en]
folding boxboard, stiffness, strength properties, moisture, test method, finite element method, paperboard
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-43253OAI: oai:DiVA.org:ri-43253DiVA, id: diva2:1385819
Conference
International Paper Physics Conference 2019, Indianapolis, IN, USA, 5-8 May 2019; PaperCon 2019
Available from: 2020-01-15 Created: 2020-01-15 Last updated: 2020-01-20Bibliographically approved

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Nygårds, Mikael

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