THE EFFECT OF PULP FIBER PROPERTIES ON THE INPLANE TEARING WORK OF PAPER

The paper analyzes the effect of pulp fiber properties on the in-plane tearing work of paper. Tear work modeled as the total energy dissipat ed during the test depends on the bond and fiber strength. The authors propose that tear work is a linear function of fiber length. Beating of coarse fibers increases the tear index of paper but beating of slen der fiber does not. The in-plane tear index displays a linear correlat ion with a measure of fracture toughness that is valid for nonlinearly elastic materials.