1.1 在某些应力条件下，以及在存在肥皂、润湿剂、油或洗涤剂等环境的情况下，吹塑聚乙烯容器表现出机械故障，其应力明显低于在没有这些环境时会导致开裂的应力。 1.2 该测试方法测量吹塑容器的环境应力抗裂性，这是容器设计、树脂、吹塑条件、后处理或其他可能影响该性能的因素的影响的总和。提供了以下三个程序: 1.2.1 程序A，容器对潜在应力开裂液体的抗应力开裂性-- 该程序对于确定容器设计对所提出的含有液体产品的容器的抗应力裂纹性或抗应力裂缝性的影响特别有用。 1.2.2 程序B，特定容器对聚氧乙基化壬基酚（CAS 68412-54-4）（一种应力开裂剂）的应力开裂阻力- 本程序中描述的测试条件是为测试由3类聚乙烯规范制成的容器而设计的 D4976 因此，本程序仅适用于由3类聚乙烯制成的容器。该程序对于确定树脂对容器抗应力裂纹性能的影响特别有用。 1.2.3 程序C，特定容器对聚氧乙基化壬基酚（CAS 68412-54-4）（一种应力开裂剂）的受控高压应力开裂阻力- 内部压力被控制在恒定的升高水平。 注1: 关于处理聚氧乙烯化壬基酚（壬基酚氧基聚（乙氧基）乙醇）存在环境问题（CAS 68412- 54-4），例如Igepal CO-630）。建议用户咨询其供应商或当地环境办公室，并遵循该化学品的正确处置指南。 1.3 这些程序不是为了测试容器颈部环境应力开裂的倾向，例如当颈部通过插入塞子受到控制应变时。 1.4 以国际单位制表示的数值应视为标准。 注2: 目前还没有与该标准等效的ISO。 1.5 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。 第节中给出了具体的预防说明 8. 和 注1 。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 如果使用得当，这些程序可以隔离材料、吹塑条件、后处理等因素对容器抗应力裂纹性的影响。 5.2 吹塑容器的环境应力开裂受多种因素的控制。由于这些因素中任何一个的变化都会改变容器的环境应力抗裂性，因此测试结果仅代表在实验室规定条件下进行的给定测试。实验室之间在多台机器上用多个模具制造的容器上的结果的再现性尚未确定。 5.3 结果可用于根据吹塑容器对环境应力开裂的抵抗力来估计其保质期，前提是这是在实际现场经验和可重复测试数据的严格背景下进行的。

1.1 Under certain conditions of stress, and in the presence of environments such as soaps, wetting agents, oils, or detergents, blow-molded polyethylene containers exhibit mechanical failure by cracking at stresses appreciably below those that would cause cracking in the absence of these environments. 1.2 This test method measures the environmental stress crack resistance of blow-molded containers, which is the summation of the influence of container design, resin, blow-molding conditions, post treatment, or other factors that can affect this property. Three procedures are provided as follows: 1.2.1 Procedure A, Stress-Crack Resistance of Containers to Potential Stress-cracking Liquids— This procedure is particularly useful for determining the effect of container design on stress-crack resistance or the stress-crack resistance of a proposed container that contains a liquid product. 1.2.2 Procedure B, Stress-Crack Resistance of a Specific Container to Polyoxyethylated Nonylphenol (CAS 68412-54-4), a Stress-Cracking Agent— The conditions of test described in this procedure are designed for testing containers made from Class 3 polyethylene Specification D4976 . Therefore, this procedure is recommended for containers made from Class 3 polyethylene only. This procedure is particularly useful for determining the effect of resin on the stress-crack resistance of the container. 1.2.3 Procedure C, Controlled Elevated Pressure Stress-Crack Resistance of a Specific Container to Polyoxyethylated Nonylphenol (CAS 68412-54-4), a Stress-Cracking Agent— The internal pressure is controlled at a constant elevated level. Note 1: There are environmental concerns regarding the disposal of Polyoxyethylated Nonylphenol (Nonylphenoxy poly(ethyleneoxy) ethanol (CAS 68412-54-4), for example, Igepal CO-630). Users are advised to consult their supplier or local environmental office and follow the guidelines provided for the proper disposal of this chemical. 1.3 These procedures are not designed to test the propensity for environmental stress cracking in the neck of containers, such as when the neck is subjected to a controlled strain by inserting a plug. 1.4 The values stated in SI units are to be regarded as standard. Note 2: There is no known ISO equivalent to this standard. 1.5 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. Specific precautionary statements are given in Section 8 and Note 1 . 1.6 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 ====== 5.1 When properly used, these procedures serve to isolate such factors as material, blow-molding conditions, post-treatment, and so forth, on the stress-crack resistance of the container. 5.2 Environmental stress cracking of blow-molded containers is governed by many factors. Since variance of any of these factors can change the environmental stress-crack resistance of the container, the test results are representative only of a given test performed under defined conditions in the laboratory. The reproducibility of results between laboratories on containers made on more than one machine from more than one mold has not been established. 5.3 Results can be used for estimating the shelf life of blow-molded containers in terms of their resistance to environmental stress cracking provided this is done against a rigorous background of practical field experience and reproducible test data.