本文件建立了乙烯/乙烯醇（EVOH）共聚物热塑性材料的命名体系，可作为规范的基础。 乙烯/乙烯醇（EVOH）共聚物塑料的类型通过基于适当等级的指定属性的分类系统相互区分: -熔体质量流动速率； -以及关于基本聚合物参数、预期用途和/或加工方法、重要性能、添加剂、着色剂、填料和增强材料的信息。 本文件适用于乙烯和乙烯醇的共聚物，其中乙烯含量为15 mol%至60 mol%。 它适用于粉末、颗粒或颗粒形式的、未经着色剂、添加剂、填料等改性或改性的、可供正常使用的材料。 这并不意味着具有相同名称的材料必然具有相同的性能。本文件不提供工程数据、性能数据或加工条件数据，这些数据可能需要用于指定特定应用和/或加工方法的材料。 如果需要此类附加性能，则应根据ISO 21309-2所述的试验方法（如适用）进行测定。 为了为特定应用指定热塑性材料或确保可重复加工，可在数据块4和5中给出额外要求（见第4条，介绍性段落）。

This document establishes a system of designation for ethylene/vinyl alcohol (EVOH) copolymer thermoplastic materials, which may be used as the basis for specifications. The types of ethylene/vinyl alcohol (EVOH) copolymer plastic are differentiated from each other by a classification system based on appropriate levels of the designatory property: — melt mass-flow rate; — and on information about basic polymer parameters, intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials. This document is applicable to copolymers of ethylene and vinyl alcohol containing from 15 mol % to 60 mol % of ethylene. It applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or modified by colorants, additives, fillers, etc. It is not intended to imply that materials having the same designation give necessarily the same performance. This document does not provide engineering data, performance data or data on processing conditions which can be required to specify a material for a particular application and/or method of processing. If such additional properties are required, they are intended to be determined in accordance with the test methods described ISO 21309-2, if suitable. In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements can be given in data block 4 and 5 (see Clause 4, introductory paragraph).