The influence of PCC morphology and pulp properties on paper delamination

Layered paper sheets consisting of two cellulose plies separated by a sparse filler layer were prepared by a handsheet-based process and by using a dynamic sheet former. The delamination force was measured as functions of the concentration and morphology of precipitated calcium carbonate (PCC) with sheets based on softwood bleached kraft pulp and based on pressurized stone groundwood. Delamination force decreased exponentially with the interply …