Leather - Physical and mechanical tests - Determination of tear load - Part 2: Double edge tear
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Our test laboratory carries out tests according to DIN EN ISO 3377-2 in an accredited procedure for the determination of the tear load of leather using the double-edge tear method. The test is applicable to all types of leather and is used to determine the force required to continue the controlled propagation of an already initiated tear.
In comparison with the single-edge tear method according to DIN EN ISO 3377-1, a symmetrical test specimen with two tear initiation cuts is used. This allows, in particular for soft or highly elastic leathers, a more stable and highly reproducible evaluation of tear propagation behavior.
The test is used for the assessment of leather for footwear, leather goods, apparel, upholstery leather and technical leather applications. It is particularly relevant for components where cuts, perforations, seams or edge areas may act as initiation points for tear propagation and where a defined tear resistance is required.
Test procedure
For testing, standardized leather specimens with two defined cuts (double-edge configuration) are prepared, conditioned and subsequently tested in a tensile testing machine at a defined test speed. The force occurring during tear propagation is continuously recorded and evaluated as tear load.