Combined Modeling And Experimental Studies To Optimize The Balance Between Fold Crack Resistance And Stiffness For Multilayered Paper Coatings - Part 1: Introduction And Modeling Studies, 2008 PAPERCON Conference

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Fold-crack resistance is a key coated paper quality that influences the functionality and appearance of the final product. Cracking at the fold may lead to strength reduction and the appearance of a visible crack at the folded surface. It is well known that bending stiffness and fold cracking are closely related, with a higher stiffness leading to higher risk of fold cracking. The aim of this study was to optimise the balance of stiffness and fold cracking for multilayered paper coatings. This paper is Part 1 of a combined modeling and experimental study to assess the relationship between fold-crack resistance and bending stiffness in coated papers. The objective of the work was to suggest ways to optimize coated paper to maximise fold-crack resistance as well as bending stiffness.