PAPER making!
FROM THE PUBLISHERS OF PAPER TECHNOLOGY INTERNATIONAL ®
Volume 10, Number 2, 2024
Relating papermaking process parameters to properties of paperboard with special attention to through ‑ thickness design
MIKAEL NYGÅRDS 1,2
A biaxial stress state has been proposed to formulate a failure criterion for paperboard during bending. About 100 paperboards have been splitted, such that top, middle, and bottom plies have been free-laid and tested in the machine direction, cross-machine direction as well as in out-of-plane direction (ZD). The purpose was to determine the failure stresses and its dependency of papermaking parameters: density, degree of orientation, and fiber length for each layer. A linear model to predict the geometrical strength of a plies was suggested. Analytically simulations of different paperboard structures behavior during bending were performed. The density of the middle ply affected the location of the failure position in ZD, as well as the maximum bending moment. The impact of orientation and degree of anisotropy was simulated, which can be used to optimize the ZD property gradient by tweaking the properties, and hence optimize paperboard performance. Contact information: 1 BillerudKorsnäs, 801 81 Gävle, Sweden. 2 Solid Mechanics, Department of Engineering Mechanics, KTH, 100 44 Stockholm, Sweden.
MRS Advances (2022) 7:789 – 798 https://doi.org/10.1557/s43580-022-00282-7 Creative Commons Attribution 4.0 International License
The Paper Industry Technical Association (PITA) is an independent organisation which operates for the general benefit of its members – both individual and corporate – dedicated to promoting and improving the technical and scientific knowledge of those working in the UK pulp and paper industry. Formed in 1960, it serves the Industry, both manufacturers and suppliers, by providing a forum for members to meet and network; it organises visits, conferences and training seminars that cover all aspects of papermaking science. It also publishes the prestigious journal Paper Technology International ® and the PITA Annual Review , both sent free to members, and a range of other technical publications which include conference proceedings and the acclaimed Essential Guide to Aqueous Coating .
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Article 1 – Paperboard Properties
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