1.1 本试验方法规定了一种测定熔融热固性涂料粉末沿与水平面以设定角度倾斜的平面向下流动特性的方法。该测试方法给出了在涂料粉末固化期间可能发生的熔体流动程度的指示。该特性有助于涂层的一致性、其表面外观和锐边的覆盖程度（参见测试方法 D2967 ），但不应将其作为判断的唯一因素。该测试方法用作检查给定涂料粉末行为的批次间变化的有用方法。不同组成的涂料粉末的结果之间的相关性是不可预期的。对于在测试温度下凝胶时间小于1分钟的涂料粉末，该测试方法不太可能产生有意义的结果（参见测试方法 D4217 ).烘箱通风、倾斜角和颗粒变化显著影响结果，使得实验室间的再现性有些难以关联。 1.2 以SI单位表示的值应被视为标准。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。 1.4 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》中确立的国际公认的标准化原则制定的。======意义和用途====== 5.1 该测试方法可用于选择在最小剪切下具有相似熔体流动特性的涂料粉末。不建议将其作为绝对测量，而是作为同一面板上同时测量的样品的比较测量。

1.1 This test method specifies a method for determining the flow characteristics of a fused thermosetting coating powder down a plane inclined at a set angle to the horizontal. This test method gives an indication of the degree of melt flow that may occur during the curing of the coating powder. This characteristic contributes to the coherence of the coating, to its surface appearance and to the degree of coverage over sharp edges (see Test Method D2967 ), however, it should not be used as the sole factor for judgment. This test method acts as a useful method for checking for batch to batch variation in the behavior of a given coating powder. Correlation between the results from coating powders of differing composition is not to be expected. This test method is unlikely to yield meaningful results with coating powders which have gel times of less than one minute at the test temperature (see Test Method D4217 ). Oven drafts, angle of inclination and pellet variations significantly affect results making inter-lab reproducibility somewhat difficult to correlate. 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 useful for selecting coating powders of similar characteristics of melt flow under minimal shear. It is not recommended as an absolute measurement, but rather as a comparative measurement of samples on the same panel measured at the same time.