ÖNORM EN ISO 2062

1 .1 This International Standard specifies methods for the determination of the breaking forte and elongation at break of textile yarns taken from packages. Four methods are given: A: manual; specimens are taken directly from conditioned packages; B: automatic; specimens are taken directly from conditioned packages; C: manual; relaxed test skeins are used after tonditioning; D: manual; specimens are used after wetting. 1.2 Method C should be used in cases of dispute regarding elongation at break of the yarn. NOTE 1 Methods A, B and C are expected to give the same results for yarn strength but method C may give somewhat truer (and higher) values of elongation than A or B. Method D is Iikely to give results differing, for both breaking forte and elongation at break, from those obtained by method A, B or C. 1.3 This International Standard specifies methods using constant rate of specimen extension (CRE) tensile testers. Testing on the now obsolete constant rate of travel (CRT) and constant rate of loading (CRL) instruments is covered, for information, in annex A, in recognition of the fact that these instruments are still popular and may be used by agreement. 1.4 This International Standard applies to all types of yarn except glass yarns, elastomeric yarns, aramid yarns, ceramic yarns, carbon yarns and polyolefin tape yarns. NOTE 2 A method for the testing of glass yarns is given in ISO 3341 :1984, Te,yti/e glass - Yarns - Determ/nation of breaking forte and breaking elongation. 1.5 This International Standard is applicable to yarns from packages but tan be applied to yarns extracted from fabrics, subject to agreement between the interested Parties. 1.6 It is intended for the Single-end (Single-Strand) testing of yarns. NOTE 3 The skein method of testing is given in ISO 6939:1988, Textiles - Yams from packages - Method of test for breaking strength of yarn by the skein method.