标准摘要
[中文适用范围]： 该文件建立了聚甲醛（POM）热塑性材料的命名系统，可作为规范的基础。 注：聚甲醛材料是主要由长链合成甲醛均聚物和共聚物组成的热塑性材料。 分子链中的重复单元是-CH2O-，是甲醛聚合而成的聚合物主链的组成部分。 聚甲醛塑料的类型通过基于以下指定性能的适当水平的分类系统来相互区分： a) 熔体质量流动速率或熔体体积流动速率； b) 拉伸模量，以及有关基本聚合物参数、预期应用、加工方法、重要性能、添加剂、着色剂、填料和增强材料的信息。 本文件适用于所有聚甲醛均聚物和聚甲醛共聚物以及含有聚甲醛的聚合物共混物。 它适用于正常使用的粉末、颗粒或丸状材料，以及未经改性和经着色剂、添加剂、填料等改性的材料。 这并不意味着具有相同名称的材料必然具有相同的性能。 本文件不提供为特定最终用途应用指定材料所需的工程数据、性能数据或加工条件数据。 如果需要此类附加性能，则应按照相关国际标准规定的测试方法确定。 [外文原描述]： This document establishes a system of designation for polyoxymethylene (POM) thermoplastic material, which can be used as the basis for specifications. NOTE Polyoxymethylene materials are thermoplastic materials composed principally of long-chain synthetic homopolymers and copolymers of formaldehyde. The repeating unit in the molecular chain is ? CH 2 O ? as an integral part of the main polymer chain resulting from polymerization of formaldehyde. The types of polyoxymethylene plastic are differentiated from each other by a classification system based on appropriate levels of the following designatory properties: a) melt mass-flow rate or melt volume-flow rate; b) tensile modulus, and on information about basic polymer parameters, intended application, method of processing, important properties, additives, colorants, fillers and reinforcing materials. This document is applicable to all polyoxymethylene homopolymers and to copolymers of polyoxymethylene and blends of polymers containing polyoxymethylene. It applies to materials ready for normal use in the form of powder, granules or pellets and to materials unmodified and modified by colorants, additives, fillers, etc. It is not intended to imply that materials having the same designation necessarily give the same performance. This document does not provide engineering data, performance data or data on processing conditions which can be required to specify materials for particular end-use applications. If such additional properties are required, they are to be determined in accordance with the test methods specified by the relevant International Standard.
英文名称Plastics — Polyoxymethylene (POM) moulding and extrusion materials — Part 1: Designation system and basis for specifications