Multivariate Modelling of Paper Strengths from Fibre Properties – Virgin Kraft Pulp, TAPPICon24

A single fibre property, such as fibre length, fibre fines, fibre width and fibrillation, of pulp could not be adequately used to predict or reflect strength properties of papers made from such pulp. Simultaneous use of all the fibre properties can accurately predict strength properties of pulps via a multivariate modelling approach. A multivariate model using all the fibre properties measured using a modern fibre analyzer has been used to predict the key strength properties of hand sheet papers made from both unrefined and refined pulps for more than 150 pulp samples evaluated. The R2 values of the predicted strength properties to that of measured values is 0.99 for unrefined pulps while that of the refined pulp samples varied between 0.75 and 0.85 depending upon the strength property. The multivariate model developed to predict the strength of unrefined pulp coming from an integrated pulp and paper mill that has on-line fibre analyzers on two different fibre lines, is currently being used on-line to monitor the quality of incoming pulp from the pulp mill to the paper machine refiners.

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