ISO 22088-3:2006规定了热塑性塑料在存在化学试剂的情况下承受固定弯曲应变时，测定其抗环境应力开裂（ESC）能力的方法。 ESC通过在环境中经过规定时间应变的试样的适当选择的指示性变化来表示。本试验方法适用于测定薄板和扁平试样的电阻，尤其是试样局部表面区域对ESC的敏感性。 这本质上是一种排名测试，并不打算提供用于设计或性能预测的数据。 有关恒定应变试验，请参考ISO 22088-5。有关恒载试验，请参考ISO 22088-2。

ISO 22088-3:2006 specifies a method for the determination of the environmental stress cracking (ESC) resistance of thermoplastics when they are subjected to a fixed flexural strain in the presence of chemical agents. ESC is indicated by the change of a suitably chosen indicative property of specimens that have been strained for a defined time in the environment. The method of test is suitable for determining the resistance of sheets and of flat test specimens, especially the sensitivity of localized surface regions of specimens, to ESC. This is essentially a ranking test and is not intended to provide data to be used for design or performance prediction. For a constant strain test, refer to ISO 22088-5. For a constant load test, refer to ISO 22088-2.