1.1 本试验方法涵盖了薄膜抗冲击穿透性的测定。本试验未提供有关试样在冲击载荷下变形时如何吸收冲击能量以及屈服后试样行为的知识。本试验方法中没有规定非环境温度。 1.2 以国际单位制表示的数值应视为标准。 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。 具体危害说明见第节 7. . 注1: 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====== 5.1 与其他测量韧性的技术一样，该试验方法提供了一种方法，可以在比低速单轴拉伸试验更接近某些最终应用的应变率下确定材料的参数。薄膜的动态拉伸行为很重要，尤其是当薄膜用作包装材料时。 适用于其他冲击试验的与厚度相关的不确定性也适用于本试验（见试验方法第3.4节） D1709 ). 因此，未提供合理化单位厚度的规定。此外，没有规定在非环境温度下进行测试。 5.2 该试验方法包括两个程序，除样品尺寸外，其他程序相似:程序A用于60 mm直径，程序B用于89 mm直径（通常称为“Spencer”）。这些数据尚未显示出相互之间的相关性。 5.3 薄膜采用了几种冲击试验方法。有时需要了解通过不同方法得出的测试结果之间的关系。进行了一项研究，其中四种薄膜由两种树脂（聚丙烯和线性低密度树脂）制成- 密度聚乙烯），每个树脂有两层膜厚，使用试验方法进行冲击 D1709 （方法A），试验方法 D3420 （程序A和B）和试验方法 D4272 . 测试结果如所示 附录X1 . 试验方法之间的结果差异 D1709 和 D4272 预计自试验方法 D1709 表示测试方法时故障引发的能量 D4272 是起始能量加上完成能量。当起始能量与总能量相同时，一些薄膜表现出一致性。本声明和测试数据也出现在 D1709 和 D4272 .

1.1 This test method covers the determination of resistance of film to impact-puncture penetration. Knowledge of how the impact energy is absorbed by the specimen while it is deforming under the impact loading, and the behavior of the specimen after yielding, is not provided by this test. No provision is made for nonambient temperatures in this test method. 1.2 The values stated in SI units are to be regarded as the standard. 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. Specific hazards statements are given in Section 7 . Note 1: 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 ====== 5.1 Like other techniques to measure toughness, this test method provides a means to determine parameters of a material at strain rates closer to some end-use applications than provided by low-speed uniaxial tensile tests. Dynamic tensile behavior of a film is important, particularly when the film is used as a packaging material. The same uncertainties about correlations with thickness that apply to other impact tests also apply to this test (see section 3.4 of Test Methods D1709 ). Hence, no provision for rationalizing to unit thickness is provided. Also, no provision is made for testing at non-ambient temperatures. 5.2 This test method includes two procedures, similar except with regard to sample size: Procedure A for 60-mm diameter and Procedure B for 89-mm diameter (commonly called the “Spencer”). The data have not been shown relatable to each other. 5.3 Several impact test methods are used for film. It is sometimes desirable to know the relationships among test results derived by different methods. A study was conducted in which four films made from two resins (polypropylene and linear low-density polyethylene), with two film thicknesses for each resin, were impacted using Test Methods D1709 (Method A), Test Method D3420 (Procedures A and B), and Test Method D4272 . The test results are shown in Appendix X1 . Differences in results between Test Methods D1709 and D4272 are expected since Test Methods D1709 represents failure initiated energy while Test Method D4272 is initiation plus completion energy. Some films have shown consistency when the initiation energy was the same as the total energy. This statement and the test data also appear in the significance and appendixes sections of Test Methods of D1709 and D4272 .