范围:本文件建立了未增塑PVC热塑性材料的名称体系，可作为规范的基础。 PVC-U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 a） 维卡软化温度， b） 冲击强度（夏比缺口）， c） 弹性模量 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。 本文件适用于质量分数至少为50%氯乙烯的均聚物和共聚物的所有未增塑成分。它也适用于含有氯化聚氯乙烯的组合物和含有上述一种或多种混合物的组合物- 上述聚合物，前提是这些聚合物的总量至少占组合物聚合物含量的50%。 它适用于粉末、颗粒或颗粒形式的正常使用材料，以及未改性或未经着色剂、添加剂、填料等改性的材料。 本文件不适用于泡沫塑料。 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，可根据ISO 21306-2规定的试验方法（如适用）确定。 为了为特定应用指定热塑性材料或确保可重复加工，数据块5中可能会给出额外要求（见4.1）。交叉引用:ISO 21306-2ISO 1043-1购买时可用的所有现行修订均包含在本文件的购买中。

Scope: This document establishes a system of designation for unplasticized PVC thermoplastic material which may be used as the basis for specifications. The types of PVC-U plastics are differentiated from each other by a classification system based on appropriate levels of the designatory properties a) Vicat softening temperature, b) impact strength (Charpy notched), c) modulus of elasticity 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 all unplasticized compositions of homopolymers and copolymers that contain at least a mass fraction of 50 % of vinyl chloride. It is also applicable to compositions containing chlorinated poly(vinyl chloride) and to compositions containing blends of one or more of the above-mentioned polymers, provided that the total amount of these polymers represents at least a mass fraction of 50 % of the polymer content of the composition. It applies to materials ready for normal use in the form of powder, granules or pellets and to materials unmodified or modified by colorants, additives, fillers, etc. This document does not apply to cellular plastics. 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 can be determined in accordance with the test methods specified in ISO 21306-2, if suitable. In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see 4.1).Cross References:ISO 21306-2ISO 1043-1All current amendments available at time of purchase are included with the purchase of this document.