1.1 本试验方法包括使用平行板塑性计测定未硫化橡胶的塑性和恢复性。可以测试未复合、复合和再生橡胶。 注1: ISO 2007和试验方法 D3194号 尽管仪器、试验条件和程序不同，但应使用与本试验方法类似的原理。 1.2 以国际单位表示的数值视为标准值。本标准不包括其他计量单位。 1.3 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 试样的塑性数和回复率分别与流动特性和弹性特性有关，并且可能有助于预测加工特性，例如易成型性和挤压特性。 4.1.1 在这种试验方法中，塑性是以相反的方式测量的，如试样的最终高度所示。因此，高塑性橡胶（试验期间流动程度高）的塑性值较低。

1.1 This test method covers the determination of plasticity and recovery of unvulcanized rubber by means of the parallel plate plastometer. Uncompounded, compounded, and reclaim rubber may be tested. Note 1: ISO 2007 and Test Method D3194 use a principle similar to this test method although the apparatus, test conditions, and procedure are different. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 The plasticity number and the recovery of the test specimen are related to the flow properties and the elastic properties, respectively, and may be useful in predicting processing characteristics, such as ease of forming and extrusion characteristics. 4.1.1 In this test method, plasticity is measured in an inverse manner, as noted by the final height of the specimen. Thus, high plasticity rubbers (high degree of flow during test) are indicated by a low plasticity number.