Dynamic dimensional changes If the external conditions suddenly change, the moisture content of paper or board cannot change immediately to reflect the new situation. Instead, there will be a period time, controlled by the various transport mechanisms, during which moisture is unevenly distributed. The resulting inhomogeneous hygroexpansion causes stresses that can lead to inelastic deformations
Authors & references
Professor Jouni Paltakari, Aalto University
Based on: Ketoja, J. Dimensional stability (Chapter 9). In: Niskanen, K. (ed), Paper Physics, (Book 16), Papermaking Science and Technology. 2nd edition. Jyväskylä, 2008, Finnish Paper Engineers’ Association/Paperi ja Puu Oy. pp. 319 – 350.
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