1.1本文件建立了塑化聚氯乙烯热塑性材料的命名体系，可作为规范的基础。1.2 PVC-U塑料的类型通过基于适当等级的指定性能的分类系统进行区分a） 肖氏硬度，b） 密度，c） 300兆帕下的扭转刚度温度，以及有关物理形态、预期用途和/或加工方法、重要特性、添加剂、着色剂的信息。1.3本文件适用于均聚物和共聚物的所有增塑成分，其中含有质量百分比至少为50%的氯乙烯。也适用于含有氯化聚氯乙烯的增塑组分和含有上述一种或多种聚合物混合物的增塑组分，只要这些聚合物的总量至少代表聚合物的50%的质量百分比作文的内容。本文件适用于以粉末（干混料）、颗粒或颗粒形式准备正常使用的材料，以及未经着色剂、添加剂、填料等修改或改性的材料。本文件不适用于泡沫塑料或糊状成分（塑料溶胶）。1.4本文件并不意味着具有相同名称的材料具有相同的性能。它不提供工程数据、性能数据或处理条件数据，这些数据可能需要为特定应用和/或处理方法指定材料。如果需要额外的性能，如果合适，可使用ISO 24023-2中规定的试验方法测定。1.5为了指定特定应用的热塑性材料或确保可重复处理，可在数据块5中给出附加要求（见4.1）。

1.1 This document establishes a system of designation for plasticized PVC thermoplastic material which can be used as the basis for specifications. 1.2 The types of PVC-U plastics are differentiated from each other by a classification system based on appropriate levels of the designatory properties a) Shore hardness, b) density, c) torsional-stiffness temperature at 300 MPa, and on information about physical form, intended application and/or method of processing, important properties, additives, colorants. 1.3 This document is applicable to all plasticized compositions of homopolymers and copolymers that contain at least a mass percentage of 50 % of vinyl chloride. It is also applicable to plasticized compositions containing chlorinated poly (vinyl chloride) and to plasticized 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 percentage of 50 % of the polymer content of the composition. This document applies to materials ready for normal use in the form of powder (dry blends), granules or pellets and to materials unmodified or modified by colorants, additives, fillers, etc. It does not apply to cellular plastics or to paste compositions (plastisols). 1.4 This document does not intend to imply that materials having the same designation give the same performance. It does not provide engineering data, performance data or data on processing conditions which might be required to specify a material for a particular application and/or method of processing. If additional properties are required, they are, if suitable, determined using the test methods specified in ISO 24023-2. 1.5 In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements can be given in data block 5 (see 4.1).