1.1 本试验方法包括使用落锤（Elmendorf型）装置测定从织物切口开始传播单撕裂所需的力。 1.2 本试验方法适用于大多数织物，包括机织物、分层毯子、绒毛、毯子和安全气囊织物，前提是织物在试验过程中不会沿与施力方向交叉的方向撕裂。织物可以是未经处理的、大尺寸的、涂层的、树脂处理的或其他处理的。提供了湿润或不湿润试样的测试说明。 1.3 该测试方法仅适用于经纱的经纱方向测试- 针织面料。它不适用于经编织物的经纱方向或大多数其他针织物的任何一个方向。 1.4 以国际单位制或美国惯用单位表示的数值应视为标准值，但必须相互独立使用。美国惯用单位可能是近似值。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 在贸易中，这种用落锤式仪器测定撕裂强度的试验方法用于织物商业装运的验收试验，但建议谨慎，因为技术人员可能无法在某些织物的结果之间达成良好的一致。按照中的指示进行比较测试 5.1.1 可能需要。 5.1.1 如果使用本测试方法进行商业装运验收测试时，由于报告测试结果的差异而产生争议，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。 建议在调查偏差时提供统计协助。作为最低要求，双方应尽可能均匀地从所述类型的大量织物中提取一组试样。然后，应将试样以相同数量随机分配给每个实验室进行测试。应使用适当的统计分析和双方在测试开始前选择的可接受概率水平，比较两个实验室的平均结果。如果发现偏差，必须找到并纠正其原因，或者买方和供应商必须同意在考虑已知偏差的情况下解释未来的测试结果。 5.2 当正确校准时，用于自动收集数据的微处理器系统可以提供经济可靠的结果。见测试方法 D2261 和 D5587 .

1.1 This test method covers the determination of the force required to propagate a single-rip tear starting from a cut in a fabric and using a falling-pendulum (Elmendorf-Type) apparatus. 1.2 This test method applies to most fabrics including woven, layered blankets, napped pile, blanket, and air bag fabrics, provided the fabric does not tear in the direction crosswise to the direction of the force application during the test. The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated. Instructions are provided for testing specimens with, or without, wetting. 1.3 This test method is suitable only for the warp direction tests of warp-knit fabrics. It is not suited for the course direction of warp knit fabrics or either direction of most other knitted fabrics. 1.4 The values stated in either SI units or U.S. customary units are to be regarded as standard, but must be used independently of each other. The U.S. customary units may be approximate. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method for the determination of tearing strength by the falling pendulum type apparatus is used in the trade for the acceptance testing of commercial shipments of fabrics, but caution is advised since technicians may fail to get good agreement between results on certain fabrics. Comparative tests as directed in 5.1.1 may be needed. 5.1.1 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of fabric of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using appropriate statistical analysis and an acceptable probability level chosen by the two parties before the testing began. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias. 5.2 Microprocessor systems for automatic collection of data can provide economical and reliable results when properly calibrated. See Test Methods D2261 and D5587 .