1.1 本试验方法用于评估和比较拉伸包装膜在运输过程中承受单位载荷的能力。 1.2 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。 1.3 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 本试验方法主要用于比较拉伸包装膜的性能。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。 4.2 该测试方法模拟了通过卡车和铁路运输单元负载，重点关注与这些模式相关的振动元件。配电系统的其他元件，如机械搬运，在本试验方法中未具体说明。 4.3 本试验方法建立了一种评定薄膜性能的方法，但对于特定的预期最终用途，可由用户自行确定可接受的额定值。

1.1 This test method is used to evaluate and compare the ability of stretch-wrap films to contain unitized loads during shipping. 1.2 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. 1.3 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 This test method is intended to be used mainly as a means of comparing the performance of stretch-wrap films. It can also be used to compare the effectiveness of different wrap cycles with the same wrapping materials. No direct correlation between these test results and actual field performance has been established. 4.2 This test method simulates the shipping of unitized loads by way of truck and rail, concentrating on the vibration element associated with these modes. Other elements of the distribution system, such as mechanical handling, are not addressed specifically in this test method. 4.3 This test method establishes a method for rating the performance of films, but it leaves open to the discretion of the user the establishment of an acceptable rating for the specific end-use intended.