Most recent
TAPPI T 414 om-12
Internal tearing resistance of paper (elmendorf-type method)
This method measures the force perpendicular to the plane of the paper required to tear multiple plies through a specified distance after the tear has been started using an Elmendorf-type tearing tester. The measured results can be used to calculate the approximate tearing resistance of a single sheet. It is not suitable for single-ply tear testing; a separate method for single-ply tear will be available. For highly directional boards and papers, prepare specimens according to T 496 "Specimen Preparation for Cross Directional Internal Tearing Resistance for Paper, Paperboard and Related Materials." For edge-tear resistance see TAPPI T 470 "Edge Tearing Resistance of Paper (Finch Method)." Caution is recommended in interpreting results from weakly bonded sheets, especially those containing lightly refined long-fibered chemical pulps. The low rate of tear when multiple plies are torn simultaneously may produce erroneously high results. See reference 15.
Technical Association of the Pulp and Paper Industry [tappi]