ISO 23910:2019 Leather- Physical and mechanical tests – – M easurement of stitch tear resistance. This document specifies a method for determining the stitch tear resistance of leather. It can be used on all leathers but is particularly suitable for leathers over 1,2 mm in thickness. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Iso 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location ISO 2419:20 12, Leather — Physical and mechanical tests — Sample preparation and conditioning ISO 2589, Leather — Physical and mechanical tests — Determination of thickness ISO 7500-1:2018, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system EN 15987, Leather — Terminology — Key definitions for the leather trade 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 15987 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://wwv.e1ectropedia.org/ 4 Principle A leather test piece is pulled against a mandrel of specified shape and dimensions, inserted through a slit in the leather, and the force required to tear the leather is recorded. 5 Apparatus Tensile testing machine, with: — a force range appropriate to the specimen under test; — a means of recording the force as specified by ISO 7500-1:2018, Class 2; — a uniform speed of separation of the jaws of (100 ± 20) mm/mm; — jaws, minimum length 25 mm in the direction of the applied load, designed to apply constant clamping by mechanical or pneumatic means. The texture and design of the inside faces of the jaws shall be such that, at the maximum load attained in the test, the specimen does not slip at either jaw.ISO 23910 pdf download.
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