1.1 本试验方法涵盖了通过配备有ASTM挤压模（Garvey型）的螺杆式挤出机测定未硫化SBR和NBR橡胶化合物的可挤压性。该试验方法旨在观察挤压的外观和轮廓。评级系统与已知挤压特性的化合物配方一起提供。除所列材料外，尚未确定评估橡胶或复合材料的试验方法的实用性。由于挤压机因实验室而异，因此该程序包括将机器之间的差异降至最低的技术。 1.2 以国际单位表示的数值应视为标准值。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 橡胶化合物挤出的一个目标是获得光滑的挤出，从而紧密再现挤出模具的轮廓。本试验方法提供了在受控条件下对此的主观测定。由于评级是主观的，因此不适合作为规范要求。 它没有定量地测量挤出性能的其他方面，例如挤出速率或模具膨胀。

1.1 This test method covers the determination of the extrudability of unvulcanized SBR and NBR rubber compounds through a screw-type extruder equipped with ASTM Extrusion Die, Garvey type. This test method is designed to allow the observation of the appearance and contours of the extrusion. Rating systems are provided along with recipes for compounds of known extrusion characteristics. The utility of the test method for evaluating rubbers or compounding materials other than those listed has not been established. Since extrusion machines differ among laboratories, the procedure includes techniques that minimize differences between machines. 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 ====== 4.1 One objective in the extrusion of rubber compounds is to obtain a smooth extrusion that closely reproduces the contours of the extrusion die. This test method provides for a subjective determination of this under controlled conditions. As the rating is subjective, it does not lend itself readily to incorporation as a specification requirement. It does not measure other aspects of extrudability such as rate of extrusion or die swell in a quantitative manner.