Estimation of the profile of cross-machine shrinkage of paper

S. J. I'Anson, R. P A Constantino, S. M. Hoole, W. W. Sampson

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    In common with many other materials, paper tends to shrink as it dries. Although every attempt is made to restrain paper, some shrinkage occurs on all paper machines in the direction perpendicular to that of manufacture and this shrinkage is always much higher at the edges of the machine than in the centre. Measurement of the profile of this cross-machine shrinkage is possible using the fast Fourier transform to locate and measure periodic elements imprinted by the filtration fabrics used during the formation of the paper web. This paper describes a new method which allows the geometrical relationships within the fabric to be used along with dimensional changes to estimate shrinkage. The method has the advantages over previous methods of more tolerant sampling protocols, operator independent analysis and improved accuracy. © 2008 IOP Publishing Ltd.
    Original languageEnglish
    Article number015701
    JournalMeasurement Science and Technology
    Issue number1
    Publication statusPublished - 2008


    • Cross-machine profile
    • FFT
    • Forming fabric
    • Paper machine
    • Shrinkage


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