1.1 该测试方法测量分配后气溶胶泡沫密封剂的体积膨胀。 1.2 该测试方法提供了一种用于估计分配以填充空腔所需的初始材料的量的方法。 1.3 气溶胶泡沫密封剂用于各种应用，旨在减少通过建筑围护结构的气流。 1.4 本试验方法适用于聚氨酯和乳胶两种单组分气溶胶泡沫密封胶。 1.5 没有其他已知的标准测试方法来测量分配膨胀后的气溶胶泡沫密封剂。 1.6 数值仅以SI单位报告。出于购买目的，某些设备和供应品以英寸-磅为单位。 1.7 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.8 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 分配后体积膨胀系数 F 表示完全固化的泡沫密封剂体积与初始分配的泡沫密封剂体积的比率。例如，如果膨胀因子 F 为2，完全固化的泡沫将使其初始体积加倍；因此，应该均匀地填充50%的空腔，以预期固化时的完全覆盖。 5.2 分配后体积膨胀系数 F 不能预测泡沫密封剂对预期应用的适用性。 5.3 该测试方法旨在为与气溶胶泡沫密封剂的分配后膨胀特性相关的产品选择提供指导。 5.4 该测试方法认为结果反映了受控的实验室条件。现场应用中的分配后膨胀可以根据温度、湿度和气溶胶泡沫密封剂接触的表面而变化。

1.1 This test method measures the volumetric expansion of aerosol foam sealants after dispensing. 1.2 This test method provides a means for estimating the quantity of initial material required to dispense in order to fill a cavity. 1.3 Aerosol foam sealants are used for a variety of applications intended to reduce airflow through the building envelope. 1.4 This test method applies to two types of single component aerosol foam sealants: polyurethane and latex. 1.5 There are no other known standard test methods to measure aerosol foam sealants post dispensing expansion. 1.6 Values are reported in SI units only. Certain apparatus and supply items are referenced in inch-pound units for purchasing purposes. 1.7 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. 1.8 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 Post dispensing volumetric expansion factor F indicates the ratio of the fully cured foam sealant volume and the initially dispensed foam sealant volume. For example, if the expansion factor F were 2, the fully cured foam would double its initial volume; therefore, one should fill 50 % of the cavity uniformly to anticipate the full coverage upon curing. 5.2 Post dispensing volumetric expansion factor F does not predict the performance capability of the foam sealants of the suitability for the intended applications. 5.3 This test method is intended to lend guidance in product selection as related to the post dispensing expansion characteristics of the aerosol foam sealants. 5.4 This test method recognizes that the results are reflective of controlled laboratory conditions. Post dispensing expansion in field applications may vary according to temperature, humidity, and surfaces that the aerosol foam sealants are in contact with.