1.1 本试验方法包括测定塑料薄膜和薄板的动态抗撕裂性，这些塑料薄膜和薄板承受最终使用的钩挂类型危险。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 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。 注1: 薄膜被任意定义为标称厚度不大于0.25 mm（0.010 in.）的薄板。 注2: 没有已知的ISO等效于本标准。 1.4 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====== 4.1 撕裂的刺穿传播测试测量材料的阻力，或更准确地说，测量材料对动态刺穿和导致撕裂的刺穿传播的阻力。在各种最终用途中，包括工业袋、衬里和防水油布中，都会出现因堵塞而导致的故障。本试验方法中报告的单位为牛顿（耐撕裂性）。 4.2 经验表明，对于许多材料，由于使用的传播探针的锋利性，穿刺对确定的力值没有显著影响。 然而，将预开孔试样的结果与正常非开孔试样的结果进行比较，将表明报告结果中任何穿刺阻力的程度。 4.3 对于许多材料，可能有一个规范要求使用该试验方法，但在遵守规范时，一些程序修改优先。因此，建议在使用本试验方法之前参考该材料规范。桌子 1分类系统 D4000 列出了当前的ASTM材料标准。

1.1 This test method covers the determination of the dynamic tear resistance of plastic film and thin sheeting subjected to end-use snagging-type hazards. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. Note 1: Film has been arbitrarily defined as sheeting having nominal thickness not greater than 0.25 mm (0.010 in.). Note 2: There is no known ISO equivalent to this standard. 1.4 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 ====== 4.1 The puncture-propagation of tear test measures the resistance of a material to snagging, or more precisely, to dynamic puncture and propagation of that puncture resulting in a tear. Failures due to snagging occur in a variety of end uses, including industrial bags, liners, and tarpaulins. The units reported in this test method are Newtons (tear resistance). 4.2 Experience has shown that for many materials puncture does not contribute significantly to the force value determined, due to the sharpness of the propagating probe used. However, comparing the results of prepunctured test specimens with normal nonpunctured specimens will give an indication of the extent of any puncture resistance in the reported result. 4.3 For many materials, there may be a specification that requires the use of this test method, but with some procedural modifications that take precedence when adhering to the specification. Therefore, it is advisable to refer to that material specification before using this test method. Table 1 of Classification System D4000 lists the current ASTM materials standards.