1.1 本试验方法涵盖了测定热塑性路面标线配方在高温下对试样的表观粘度所需的样品制备和试验程序。 1.2 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的数值是常用单位，仅供用户使用。 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 本试验方法用于测量高温下热塑性路面标线的表观粘度。热塑性路面标线的高温粘度可能与涂层、粘合剂和复合热塑性塑料的性能有关。 该方法有助于确定流动特性，可用于确定应用于路面时的加工性。 5.2 热塑性路面标线可以几种不同的方式应用于路面。典型的应用方法有熨平板挤出、带状挤出、薄膜喷涂和标准喷涂。正确的应用取决于热塑性材料在所用方法的应用温度下的粘度。例如，细线应用的热塑性路面标线需要相对较低的粘度。 熨平板挤出应用的热塑性塑料需要更高的粘度。 5.3 本程序中所述类型的材料可能是非牛顿材料，因此，表观粘度将是试验条件下剪切速率的函数。尽管本试验方法中所述的粘度计在相对较低的剪切速率条件下工作，但剪切效应可能存在差异，这取决于为试验程序选择的主轴和转速条件。非牛顿粘度值之间的比较仅适用于在等效剪切条件下使用类似粘度计进行的测量。 对于这种方法，建议使用“鱼雷”主轴。鱼雷主轴约为1英寸。长且有许多直径，底部呈45°锥形。建议直径为所用套管直径的一半。如果在路面标线配方中使用较大的玻璃微珠，则可能需要较小直径的心轴，以便微珠不会由于套管内壁和心轴之间的堵塞而导致心轴阻抗。

1.1 This test method covers the sample preparation and testing procedure needed to determine the apparent viscosity of a thermoplastic pavement marking formulation at elevated temperatures to the specimen. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are customary units and are provided as a courtesy to the user. 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 used to measure the apparent viscosity of thermoplastic pavement marking at elevated temperatures. Elevated temperature viscosities of thermoplastic pavement marking may be related to the properties of coatings, adhesives, and composite thermoplastics. This method is helpful in determining the flow properties which can be used in determining processability when applied to the road surface. 5.2 Thermoplastic pavement markings may be applied to the road surface in several different ways. Typical methods of application are screed extrude, ribbon extrude, thin film spray, and standard spray. Proper application depends on the viscosity of the thermoplastic material at application temperatures for the method being used. Thin-line applied thermoplastic pavement marking, for example, requires a relatively lower viscosity. Screed extrude applied thermoplastic requires a higher viscosity. 5.3 Materials of the type described in this procedure may be non-Newtonian, and as such, the apparent viscosity will be a function of shear rate under the conditions of test. Although the viscometer described in this test method operates under conditions of relatively low shear rate, differences in shear effect can exist depending upon the spindle and rotational speed conditions selected for the test program. Comparisons between non-Newtonian viscosity values should be made only for measurements made with similar viscometers under conditions of equivalent shear. For this method, “torpedo” spindles are recommended. Spindles considered torpedo spindles are ~1-in. long and come in many diameters with a 45° conical bottom. A diameter that is half the diameter of the thimbles used is recommended. If large glass beads are used in the pavement marking formulation, a smaller diameter spindle may be needed so the beads do not cause an impedance of the spindle due to a jamming between the inside wall of the thimble and the spindle.