1.1 本试验方法涵盖了一个程序，用于确定橡胶在特定弯曲变形后、在指定温度下在选定介质中老化后以及在指定时间段内的恢复响应，从而测量轴封制造中使用的化合物的相对性能潜力。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1 影响轴封寿命的因素包括保持弹性和补偿轴偏心的能力、从弯曲中恢复的能力、耐磨性和接触液的膨胀效应。候选材料的在役测试耗时，因此成本高昂。在高温下暴露在液体中后，测量弯曲恢复提供了一种快速评估材料使用潜力和可接受性的方法。然后可以筛选比较回收率数据，并选择性能最佳的化合物进行进一步改进或密封制造。已经发现，材料从弯曲中恢复的能力与密封效果之间存在良好的相关性。 4.2 该方法旨在测量不同橡胶化合物在任何液体介质（包括液压油和水）中老化后的回收率。该方法也可用于测试橡胶化合物在空气中老化后的性能。应根据预期的最终用途选择测试液体。

1.1 This test method covers a procedure to determine the recovery response of rubber after particular bending deformation, subsequent to aging in selected media at a specified temperature, and for a specified time period, thus providing a measure of the relative performance potential of compounds used in the manufacture of shaft seals. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 4.1 Among the factors affecting shaft seal life are the ability to retain elasticity and compensate for shaft eccentricity, ability to recover from bending, and resistance to wear and the swelling effects of contact fluids. In-service testing of candidate materials is time consuming and therefore costly. Measurement of recovery from bending after exposure in fluids at elevated temperatures provides a means of quickly assessing the material's potential and acceptability for use. Comparative recovery data may then be screened and optimum performing compounds selected for further improvement or seal fabrication. It has been found that good to excellent correlation exists between a material's ability to recover from bending and sealing effectiveness. 4.2 This method is designed to measure the recovery of different rubber compounds after aging in any liquid medium, including hydraulic oils and water. This method can also be used to test rubber compounds after aging in air. Test liquids should be chosen based on the intended end use.