GB/T 43316.3-2023 specifies the standard for the determination of the bending method of plastic resistance to environment stress cracking (ESC). This standard applies to a variety of plastics, explains the principle of bending method in detail, and clearly specifies the test equipment, sample prepative, bending Operation mode, environment medium and test time. According to this standard, the cracking performance of plastics under environment stress can be accurately evaluated, and key performance data can be provided for the application of plastics in outdoor, chemical and other complex environment fields. Help enterprises to select materials reasonably and improve the environmental adaptability and durability of plastic products.