1.1 本试验方法用于评估和比较拉伸包装膜在实验室模拟中承受水平冲击的能力。 1.2 测试水平可能会有所不同，以代表用于测试单元负载的运输和搬运模式。 1.3 试验方法中详细描述了执行受控水平碰撞的方法 D4003 . 本试验方法将仅描述在评估负载均匀性薄膜性能的特殊情况下的样品制备和评估。 1.4 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。 1.5 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 本试验方法主要用于比较复合膜的性能。 它还可以用于比较相同包装材料的不同包装周期的有效性。这些测试结果与实际现场性能之间没有直接相关性。 5.2 该测试方法模拟分布环境的水平冲击元素。在仓库和运输车辆装卸过程中，轨道车切换和托盘编组过程中会遇到水平冲击。 5.3 该测试方法允许用户自行决定测试级别的确定和构成测试的影响数量，以便用户可以定制测试以模拟自己的特定分布环境。 题为“元素H-模拟轨道转换”的章节在实践中 D4169 可能在这方面提供一些指导。

1.1 This test method is used to evaluate and compare the ability of stretch-wrap films to survive horizontal impacts in a laboratory simulation. 1.2 The test levels may be varied to represent the mode of shipping and handling used for the unit load under test. 1.3 The methodology of performing the controlled horizontal impacts is described in detail in Test Methods D4003 . This test method will describe only sample preparation and evaluation in the special case of evaluating the performance of film for load unitizing. 1.4 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. 1.5 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 is intended to be used mainly as a means of comparing the performance of unitizing films. It can also be used to compare the effectiveness of different wrap cycles with the same wrapping materials. No direct correlation between these tests results and actual field performance has been established. 5.2 This test method simulates the horizontal impact elements of the distribution environment. Horizontal impacts are encountered in rail car switching and pallet marshalling procedures, both in the warehouse and during the loading and unloading of transport vehicles. 5.3 This test method leaves open to the discretion of the user the establishment of test levels and the number of impacts constituting the test so that one might tailor the test to simulate one’s particular distribution environment. The section entitled “Element H—Simulated Rail Switching” in Practice D4169 may provide some guidance in this regard.