| ISO 13937-2 Tear strength | |
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For each material is tested 5 samples in warp direction and 5 samples in plot sense. Test: fixing the specimen in the jaws, with one leg in each of them. The uncut portion of the specimen is free. Starts the dynamometer with a constant speed of 100 mm / min, setting in motion one of the jaws (mobile clip) and continue the tear until it reaches the point marked 2.5 cm from the edge of the specimen. Calculation of the tear: for each of the specimens tested the resulting graph is divided into 4 equal parts. The first part will depreciate and the remaining three will pick the 2 highest peaks and the two lowest peaks. With the 12 values from each probe is made the average.
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