Usage : For measuring the tearing resistance of paper or similar materials .
Definition : 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. More than one sheet of the sample material are torn together through a fixed distance by means of the pendulum of an Elmendorf-type tearing tester. The work done in tearing is measured by the loss in potential energy of the pendulum. The average force exerted when a certain number of plies are torn together (work done divided by the total distance torn).
Standardization : TAPPI T-414 , APPITA P-400 , SCAN P-11 , ASTM D 689 , D 751 , D 1424 , IS 1060 , IS 1991
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