警告1-使用本文件的人员应熟悉正常的实验室实践。本文件并非旨在解决与其使用相关的所有安全问题（如有）。用户有责任建立适当的安全和健康实践，并确定任何其他限制的适用性。 警告2——本文件中规定的某些程序可能涉及使用或产生可能构成当地环境危害的物质，或产生废物。使用后，应参考有关安全处理和处置的适当文件。 本文件规定了两种方法，用于测定硫化橡胶或热塑性橡胶试件施加的反作用力的减少，该试件已压缩至恒定变形，然后进行温度循环。方法A:在高温老化和低温之间循环温度，以检查低温下的密封力。方法B:在高温和低温之间连续循环温度，以在试样中引入热应力。 反作用力是通过连续力来确定的- 测量系统。 本文件规定了两种形式的试件:圆柱形试件和环形试件。只有在尺寸和形状相似的试件上进行比较时，结果才有效。 环形试件的使用尤其适用于液体环境中应力松弛的测定。交叉引用:ISO 18899:2013ISO 188:2011ISO 37:2017ISO 23529:2016ISO 3601-1:2012ISO 11346ISO 1817ISO 4287购买本文件时提供的所有当前修订版均包含在购买本文件中。

WARNING 1 — Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to determine the applicability of any other restrictions. WARNING 2 — Certain procedures specified in this document might involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use.This document specifies two methods for determining the decrease in counterforce exerted by a test piece of vulcanized or thermoplastic rubber which has been compressed to a constant deformation and then undergoes temperature cycling.Method A:The temperature is cycled at intervals between a high temperature for ageing and a low temperature for checking the sealing force at this low temperature.Method B:The temperature is cycled continuously between a high temperature and a low temperature to introduce thermal stress in the test piece. The counterforce is determined by means of a continuous-measurement system. Two forms of test pieces are specified in this document: cylindrical test pieces and rings. Comparison of results is valid only when made on test pieces of similar size and shape. The use of ring test pieces is particularly suitable for the determination of stress relaxation in liquid environments.Cross References:ISO 18899:2013ISO 188:2011ISO 37:2017ISO 23529:2016ISO 3601-1:2012ISO 11346ISO 1817ISO 4287All current amendments available at time of purchase are included with the purchase of this document.