- Centre for Image Analysis, Swedish University of Agricultural Sciences
Almgren, K.M.; Gamstedt, E.K.; Nygård, P.; Malmberg, Filip; Lindblad, Joakim; Lindström, M.
Paper-reinforced plastics are gaining increased interest as packaging materials, where mechanical properties are of great importance. Strength and stress transfer in paper sheets are controlled by fibre-fibre bonds. In paper-reinforced plastics, where the sheet is impregnated with a polymer resin, other stress-transfer mechanisms may be more important. The influence of fibre-fibre bonds on the strength of paper-reinforced plastics was therefore investigated. Paper sheets with different degrees of fibre-fibre bonding were manufactured and used as reinforcement in a polymeric matrix. Image analysis tools were used to verify that the difference in the degree of fibre-fibre bonding had been preserved in the composite materials. Strength and stiffness of the composites were experimentally determined and showed no correlation to the degree of fibre-fibre bonding, in contrast to the behaviour of unimpregnated paper sheets. The degree of fibre-fibre bonding is therefore believed to have little importance in this type of material, where stress is mainly transferred through the fibre-matrix interface. (C) 2009 Elsevier Ltd. All rights reserved.
Composites; Wood; Microscopy
International Journal of Adhesion and Adhesives
2009, Volume: 29, number: 5, pages: 551-557
Publisher: ELSEVIER SCI LTD
Other Chemical Engineering