1.1 本规程涵盖了用于测定涂层物理性能的有机涂层游离膜的制备。 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。 1.4 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====== 5.1 进行测试以评估物理和机械性能，如拉伸和伸长率，需要使用游离膜（测试方法 D2370 )，湿气渗透性（试验方法 D1653 和 E96/E96M )，耐微生物活性（试验方法 D5590 )，以及有机涂层的其他物理性质，其中基材可能干扰测定。

1.1 This practice covers the preparation of free films of organic coatings for use in determining the physical properties of the coatings. 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. 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 Free films are required for conducting tests to evaluate physical and mechanical properties such as tensile and elongation (Test Methods D2370 ), moisture vapor permeability (Test Methods D1653 and E96/E96M ), microbiological activity resistance (Test Method D5590 ), and other physical properties of organic coatings where the substrate may interfere with the determination.