标准摘要
[中文适用范围]： 本文件建立了未增塑 PVC 热塑性材料的命名系统，可用作规范的基础。 PVC-U 塑料的类型通过基于适当级别的指定性能的分类系统进行区分：a) 维卡软化温度，b) 冲击强度（夏比缺口），c) 弹性模量以及有关基本聚合物的信息参数、预期应用和/或加工方法、重要特性、添加剂、着色剂、填料和增强材料。 本文件适用于所有含有质量分数至少为 50% 的氯乙烯的均聚物和共聚物的未增塑组合物。 它还适用于包含氯化聚(氯乙烯)的组合物以及包含一种或多种上述聚合物的共混物的组合物，条件是这些聚合物的总量代表至少50%的聚合物含量的质量分数的组成。 它适用于正常使用的粉末、颗粒或粒料形式的材料，以及未经改性或经着色剂、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，这些数据可能需要为特定应用和/或加工方法指定材料。 如果需要此类附加性能，则可以根据 ISO 21306-2 中规定的测试方法（如果适用）来确定。 为了指定特定应用的热塑性材料或确保可重复加工，数据块 5 中可能给出附加要求（见 4.1）。 [外文原描述]： 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).
英文名称Plastics — Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion materials — Part 1: Designation system and basis for specifications