1.1本文件建立了氯乙烯热塑性树脂的名称系统，可用作质量标准的基础。 1.2氯乙烯塑料的类型通过基于适当等级的指定性质的分类系统彼此区分: a)降低的粘度； b)表观密度； c)在63 μ m筛上的滞留； d)在室温下的增塑剂吸收(对于通用树脂)； e)标准糊剂的粘度和流变行为类型(仅用于糊剂树脂)； 以及关于基本聚合物参数、聚合过程和预期应用的信息。 1.3本文件适用于由单体氯乙烯的均聚物和共聚物、三元共聚物等组成的粉末形式的树脂。氯乙烯与一种或多种其它单体的反应，但其中氯乙烯是主要成分。树脂可以含有少量的未聚合物质(例如乳化剂或悬浮剂、催化剂残余物等)和在聚合过程中加入的其它物质。 1.4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，这些数据可能需要指定用于特定应用和/或加工方法的材料。 如果需要此类附加性质，则根据ISO 24024-2中规定的测试方法（如果合适）进行测定。 1.5为了指定用于特定应用的树脂或确保可重复加工，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 vinyl chloride thermoplastic resins which can be used as the basis for specifications. 1.2 The types of vinyl chloride plastics are differentiated from each other by a classification system based on appropriate levels of the designatory properties: a) reduced viscosity; b) apparent density; c) retention on a 63 μm mesh sieve; d) plasticizer absorption at room temperature (for general-purpose resins); e) the viscosity and the type of rheological behaviour of a standard paste (for paste resins only); and on information about basic polymer parameters, polymerization processes and intended applications. 1.3 This document is applicable to resins in powder form which consist of homopolymers of the monomer vinyl chloride and copolymers, terpolymers, etc., of vinyl chloride with one or more other monomers, but where vinyl chloride is the main constituent. The resins can contain small amounts of non-polymerized substances (e.g. emulsifying or suspending agents, catalyst residues, etc.) and other substances added during the course of polymerization. 1.4 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 determined in accordance with the test methods specified in ISO 24024-2, if suitable. 1.5 In order to specify a resin for a particular application or to ensure reproducible processing, additional requirements can be given in data block 5 (see 4.1).