1.1 这些试验方法包括测定自由流动粘合剂的粘度。 1.1.1 本试验方法对自流平粘合剂的限制消除了触变性和塑性材料，其粘度是搅拌速度和粘合剂先前历史的函数。 1.2 以国际单位制表示的数值应视为标准。括号中的值仅供参考。 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====== 4.1 牛顿和近牛顿流动特性的粘度测定采用了几种试验方法。（对于不属于该类别的粘合剂，试验方法 D2556 应考虑。）四种试验方法如下: 4.1.1 方法A 仅适用于从第节中描述的其中一个皮碗中以稳定不间断流输送50 mL的粘合剂 5. . 4.1.2 方法B 用于测量粘合剂的粘度，范围为0.05 Pa·s至200 Pa·s（50至200 000 cP），并且仅限于具有或接近牛顿流动特性的材料。 4.1.3 方法C 主要用作测定具有或接近牛顿流动特性的粘合剂粘度的控制方法。 4.1.4 方法D 主要用于确定等效粘度不大于约3000 mPa·s（cP）的材料的粘度的控制方法，并且仅限于具有或接近牛顿流动特性的材料。

1.1 These test methods cover the determination of the viscosity of free-flowing adhesives. 1.1.1 The limitation of this test method to self-leveling adhesives eliminates thixotropic and plastic materials whose viscosity is a function of the rate of stirring and previous history of the adhesive. 1.2 The values stated in SI units are to be regarded as the standard. The values 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 ====== 4.1 Several test methods are noted for viscosity determination of Newtonian and near Newtonian flow characteristics. (For adhesives not fitting into this category, Test Method D2556 should be considered.) Four test methods are covered as follows: 4.1.1 Method A is applicable only to adhesives that will deliver 50 mL in a steady uninterrupted stream from one of the cups described in Section 5 . 4.1.2 Method B is intended for measuring the viscosity of adhesives covering a range from 0.05 Pa · s to 200 Pa · s (50 to 200 000 cP) and is limited to materials that have or approach Newtonian flow characteristics. 4.1.3 Method C is intended primarily as a control method for determining the viscosity of adhesives that have or approach Newtonian flow characteristics. 4.1.4 Method D is intended primarily as a control method for determining the viscosity of materials that have an equivalent viscosity no greater than approximately 3000 mPa · s (cP) and is limited to materials that have or approach Newtonian flow characteristics.