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Fibre morphological effects on mechano-sorptive creep

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Abstract

The increased creep rate of paper under load during moisture cycling conditions as compared to that at high constant humidity is a problem in the use of packaging materials. In order to investigate the influence of morphological factors of the fibres on the occurrence and magnitude of this phenomenon, i.e. the occurrence of mechano-sorptive creep, studies on wood fibres isolated from different parts of spruce wood were performed. Thus, creep properties were studied on earlywood and latewood fibres from both juvenile wood and mature wood. In general, latewood fibres showed a higher degree of mechano-sorptive creep than earlywood fibres, and mature wood showed a higher degree of mechano-sorptive creep than juvenile fibres. The difference in mechano-sorptive creep rate between different fibres was shown to be correlated to the differences in fibril angle. The smaller the fibril angle the higher was the mechano-sorptive creep ratio. It was suggested that at fibril angles approaching 45° wood fibres do not exhibit mechano-sorptive creep.

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Acknowledgments

This study has been conducted as part of a Master Thesis work by Fang Dong.

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  1. Innventia, Box 5604, 114 86, Stockholm, Sweden

    Fang Dong, Anne-Mari Olsson & Lennart Salmén

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  1. Fang Dong
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  2. Anne-Mari Olsson
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  3. Lennart Salmén
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Correspondence to Lennart Salmén.

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Dong, F., Olsson, AM. & Salmén, L. Fibre morphological effects on mechano-sorptive creep. Wood Sci Technol 44, 475–483 (2010). https://doi.org/10.1007/s00226-009-0300-3

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