1.1 本试验方法涵盖了在稳态、给定温度和相对湿度%RH水平下，通过薄膜、薄片、层压板、共挤压或塑料涂层纸或织物测定氧气传输速率的程序。该测试方法扩展了处理零湿度或充其量假设湿度的常见做法。湿度对氧气传输速率（O）起着重要作用 2. 全球技术法规）。本试验方法规定了氧气传输速率（O）的测定 2. GTR），薄膜对氧气的渗透性（PO） 2. )，膜对其厚度的渗透系数（P“O 2. )和透氧系数（PʹO 2. )对于在给定温度和相对湿度百分比水平下的均质材料。 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。第节给出了具体的预防说明 9 . 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 O 2. 给定温度和相对湿度百分比下的GTR是屏障材料提供包装保护的重要决定因素。然而，这不是唯一的决定因素，必须根据经验进行额外的测试，以将包装性能与O 2. 全球技术法规。如果买方和卖方已就取样程序、标准化程序、测试条件和验收标准达成一致，则其适合作为测试的参考方法。

1.1 This test method covers a procedure for determination of the rate of transmission of oxygen gas, at steady-state, at a given temperature and %RH level, through film, sheeting, laminates, co-extrusions, or plastic-coated papers or fabrics. This test method extends the common practice dealing with zero humidity or, at best, an assumed humidity. Humidity plays an important role in the oxygen gas transmission rate (O 2 GTR) of many materials. This test method provides for the determination of oxygen gas transmission rate (O 2 GTR), the permeance of the film to oxygen gas (PO 2 ), the permeation coefficient of the film to its thickness (P”O 2 ), and oxygen permeability coefficient (PʹO 2 ) in the case of homogeneous materials at given temperature and %RH level(s). 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 precautionary statements are given in Section 9 . 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 O 2 GTR at a given temperature and %RH is an important determinant of the packaging protection afforded by barrier materials. It is not, however the sole determinant, and additional tests, based on experience, must be used to correlate packaging performance with O 2 GTR. It is suitable as a referee method of testing, provided that purchaser and seller have agreed on sampling procedures, standardization procedures, test conditions and acceptance criteria.