1.1本术语涵盖塑料行业中使用的技术术语的定义。不包括其他现成来源中普遍理解或充分定义的术语。 1.2当委员会D20负责的ASTM文件中使用术语时，只有在小组委员会D20.92审查后判断该术语为一般可用术语时，才将其包括在内。 1.3与其他标准机构发布的定义相同的定义用组织名称的缩写标识；例如，IUPAC是国际纯化学和应用化学联合会。 1.4定义是一句话，附加信息包含在讨论笔记中。每5年审查一次；附上上次审查的年份。 1.5有关塑料术语的文献，请参阅附录X1。

1.1 This terminology covers definitions of technical terms used in the plastics industry. Terms that are generally understood or adequately defined in other readily available sources are not included. 1.2 When a term is used in an ASTM document for which Committee D20 is responsible it is included only when judged, after review, by Subcommittee D20.92 to be a generally usable term. 1.3 Definitions that are identical to those published by another standards body are identified with the abbreviation of the name of the organization; for example, IUPAC is the International Union of Pure and Applied Chemistry. 1.4 A definition is a single sentence with additional information included in discussion notes. It is reviewed every 5 years; the year of last review is appended. 1.5 For literature related to plastics terminology, see Appendix X1.