1.1 该分类系统涵盖适用于成型和挤出的分段嵌段共聚醚酯弹性体。 1.2 该分类系统允许使用可回收的分段嵌段共聚醚酯弹性体，前提是满足该分类系统中规定的要求。然而，本规范实际上无法涵盖所用回收材料的比例以及任何污染物的性质和数量。 1.3 该分类系统中包含的特性是识别所涵盖成分所需的特性。可能还有其他必要的要求来识别对专业应用程序重要的特定特性。 指定它们的一种方法是使用第节中给出的后缀 5. 。 1.4 该分类系统和随后的线路标注（规范）旨在提供一种方法来标注制造最终产品或零件时使用的塑料材料。它不用于材料的选择。材料选择最好由在塑料领域具有专业知识的人员在仔细考虑零件所需的设计和性能、暴露的环境、所采用的制造工艺、所涉及的成本以及该分类系统所涵盖的材料以外的材料固有特性后进行。 1.5 以国际单位制表示的数值应视为标准。 本标准中不包括其他计量单位。 1.6 以下注意事项仅适用于测试方法部分，第节 11 ，属于该分类系统。 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。 注1: 本标准、ISO 20029-1和ISO 20029-2涉及相同的主题，但技术内容不同。 1.7 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。

1.1 This classification system covers segmented block copolyether-ester elastomers suitable for molding and extrusion. 1.2 This classification system allows for the use of segmented block copolyether-ester elastomers that are recycled provided that the requirements as stated in this classification system are met. The proportions of recycled material used, as well as the nature and amount of any contaminant, however, cannot be covered practically in this specification. 1.3 The properties included in this classification system are those required to identify the compositions covered. It is possible that there are other requirements necessary to identify particular characteristics important to specialized applications. One way of specifying them is by using the suffixes as given in Section 5 . 1.4 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection is best made by those having expertise in the plastic field after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this classification system. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 The following precautionary caveat pertains only to the test methods portion, Section 11 , of this classification system. 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. Note 1: This standard, ISO 20029-1, and ISO 20029-2 address the same subject matter, but differ in technical content. 1.7 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.