Paper, Tear strength, Tensile properties

Provider: TAPPI

Price: $49.00
Product Details

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.

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