1.1 本试验方法提供了一个程序，用于确定在安装过程中或安装后刺穿密封剂背衬时的放气潜力，刺穿发生在密封剂固化之前。 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。 1.4 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 如果密封剂衬垫在制造或运输到工作现场时有缺陷，或在安装过程中被滥用，则本试验方法是潜在密封问题的指标。如果存在缺陷，某些密封剂背衬材料与某些环境条件结合，可能会放气，在密封剂固化之前在应用的密封剂中产生空隙，从而可能影响固化的密封剂的预期性能。 5.2 空隙也已知是由其他方式和某些条件引起的，例如密封剂应用过程中的空气滞留、基质中的滞留空气释放到未固化的密封剂中、密封剂与密封剂背衬或基质的不相容性，或现场的不适合安装条件。本试验方法仅限于通过在热和压缩条件下在软未固化密封剂中形成空隙来识别穿孔密封剂背衬的放气潜力。

1.1 This test method provides a procedure for determining the outgassing potential of a sealant backing when it is punctured during or after installation, with the puncture occurring before the sealant cures. 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 This test method is an indicator of a potential sealing problem that could occur if a sealant backing is flawed in manufacture or transportation to the job site, or abused during the installation. If flawed, some sealant backing materials, in combination with certain environmental conditions, can outgas, generating voids in the applied sealant before the sealant cures, thereby potentially compromising the cured sealant's intended performance. 5.2 Voids are also known to be caused by other means and under certain conditions such as air entrapment during sealant application, trapped air in the substrate releasing into the uncured sealant, incompatibility of the sealant with the sealant backing or substrate, or inhospitable installation conditions in the field. This test method is limited to identifying the outgassing potential of a punctured sealant backing by formation of a void in the soft uncured sealant under conditions of heat and compression.