1.1 本试验方法包括塑料薄膜屈服（单位质量面积）的测定。 1.2 本试验方法中还描述了计算标称屈服、标称密度和标称厚度给定值的方法。这是必要的，因为在材料规范中，屈服极限通常以实际屈服与标称屈服的百分比偏差表示。 1.3 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。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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: 本标准和ISO 4591涉及相同的主题，但技术内容不同。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 实际产量对薄膜转换器来说很重要，因为这决定了他在特定转换中可以从任何给定质量的薄膜中获得的单元或包装的实际数量。

1.1 This test method covers the determination of yield (area per unit mass) of plastic film. 1.2 Also described in this test method is the means for calculating nominal yield, given values for nominal density, and nominal thickness. This is needed since, in material specifications, limits for yield are normally stated in terms of the percent deviation of actual yield from nominal yield. 1.3 The values stated in SI units are to be regarded as the standard. The values given in brackets are for information only. 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. Note 1: This standard and ISO 4591 address the same subject matter, but differ in technical content. 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 ====== 4.1 Actual yield is important to the film converter as this determines the actual number of units or packages that he can derive in a particular conversion from any given mass of film.