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现行 ASTM D7395-18(2023)
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Standard Test Method for Cone/Plate Viscosity at a 500 s<sup>-1</sup> Shear Rate 500 s<sup>-1</sup>剪切速率下锥体/板粘度的标准试验方法
发布日期: 2023-02-01
1.1 本试验方法包括在500 s的剪切速率下使用锥板粘度计测定涂料和相关产品的粘度 -1 . 1.2 通过该方法获得的粘度值可作为4号福特杯测量结果的替代。该方法的值不会复制福特杯的结果,但可用于质量控制、生产商用户规范和粘度降低,与福特杯的使用方式相同。 1.3 如果需要较高剪切速率下的粘度,试验方法 第4287页 ,描述了10 000 s时的粘度测量 -1 至12000秒 -1 可以使用。 1.4 以国际单位制表示的值应视为标准值。括号中给出的值仅供参考,不视为标准值。 1.5 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建立适当的安全、健康和环境实践,并确定监管限制的适用性。 1.6 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 该测试已用于测量汽车面漆的粘度,以代替福特杯4号测量,并提供了评估油漆是否符合规范和可喷涂的同等能力。 4.2 该方法可作为福特杯4号和其他产品流出杯测量的替代方法。 4.3 该方法中描述的粘度计类型比Ford和其他外排杯提供更好的温度控制,预计将提供更好的精度。 4.4 该试验方法适用于所有油漆和相关材料,无论其行为是否为牛顿型。
1.1 This test method covers the determination of the viscosity of paints and related products using a cone/plate viscometer at a shear rate of 500 s -1 . 1.2 Viscosity values obtained by this method may be used as an alternative to results from No. 4 Ford cup measurements. The values from this method do not replicate Ford cup results, but can be used for quality control, producer-user specifications and viscosity reduction in the same manner that Ford cups are used. 1.3 If viscosity at a higher shear rate is needed, Test Method D4287 , which describes viscosity measurement at 10 000 s -1 to 12 000 s -1 may be used. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only and are not considered standard. 1.5 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. 1.6 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 ====== 4.1 This test has been used to measure viscosities of automotive topcoats in place of No. 4 Ford cup measurements and has provided an equivalent ability to evaluate whether the paint meets specifications and is sprayable. 4.2 The method could be considered as an alternative to No. 4 Ford cup and other efflux cup measurements for other products as well. 4.3 The type of viscometer described in this method gives better temperature control than Ford and other efflux cups and is expected to give better precision. 4.4 This test method is suitable for all paints and related materials whether they are Newtonian in behavior or not.
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归口单位: D01.24
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