A new way of testing paper sheet formation

The mechanical properties of a paper sheet depend on the nature of the fibr es, the bonding between the fibres and their distribution within the sheet. The information presented in this work is based on measurements made with a sensor that simultaneously measures basis-weight, anisotropy and dominant fibre orientation in paper sheets. This instrument uses a non-destructive process and works at the millimetre scale. Corte has developed successful m odels describing basis-weight distribution. In the present work, these mode ls are used to analyse new mass distribution data and also anisotropy and d ominant fibre orientation distribution data. Particular attention is given to the effect of the inspection aperture. (C) 2001 Elsevier Science Ltd. Al l rights reserved.