Annex D(normative)Wide-width trouser test specimensGenerala) In accordance with 9.4, test specimens are discarded if threads to be torn slip unbroken, the tear is incomplete or does not proceed along the direction of force. If three or more out of five test specimens are rejected, the method is considered unsuitable. In these cases it is recommended to proceed the test with wide-width trouser test specimens (see figure D.1).b) For special tear-resistant fabrics, above mentioned criteria are not suitable, e.g. for loose fabrics, rip-stop fabrics, man-made-fibre tear-resistant fabrics for technical applications (fabrics for coating or air bags etc.).In these cases it is recommended to perform the test with specimens of enlarged width (see figure D.1).Other widths may be agreed by the interested parties.ProcedureFor clamping, each trouser leg is to be folded from the outside parallel and toward the cut so that the clamped width of each trouser leg is half of the cut width (see figure D.2).All other test conditions shall be as specified in this part of EN ISO 13937 except the width of the jaws shall be at least half the width of the test specimen.For special tear-resistant fabrics the evaluation of all peaks in accordance with 10.2 is necessary. The specific design of a tear-resistant fabric may result in "unusual" tear traces, which are often the specific characteristic of those fabrics and it is recommended to agree to the evaluation which seems adequate and to include a recorded tear trace.
Annex D(normative)Wide-width trouser test specimensGenerala) In accordance with 9.4, test specimens are discarded if threads to be torn slip unbroken, the tear is incomplete or does not proceed along the direction of force. If three or more out of five test specimens are rejected, the method is considered unsuitable. In these cases it is recommended to proceed the test with wide-width trouser test specimens (see figure D.1).b) For special tear-resistant fabrics, above mentioned criteria are not suitable, e.g. for loose fabrics, rip-stop fabrics, man-made-fibre tear-resistant fabrics for technical applications (fabrics for coating or air bags etc.).In these cases it is recommended to perform the test with specimens of enlarged width (see figure D.1).Other widths may be agreed by the interested parties.ProcedureFor clamping, each trouser leg is to be folded from the outside parallel and toward the cut so that the clamped width of each trouser leg is half of the cut width (see figure D.2).All other test conditions shall be as specified in this part of EN ISO 13937 except the width of the jaws shall be at least half the width of the test specimen.For special tear-resistant fabrics the evaluation of all peaks in accordance with 10.2 is necessary. The specific design of a tear-resistant fabric may result in "unusual" tear traces, which are often the specific characteristic of those fabrics and it is recommended to agree to the evaluation which seems adequate and to include a recorded tear trace.<br>
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