塑料 - 超高分子量聚乙烯（Pe-Uhmw）成型和挤出材料 - 第1部分:指定系统及规格依据

[中文适用范围]： 该文件建立了热塑性PE-UHMW材料的命名系统，可作为规范的基础。 就本文件而言，PE-UHMW 材料是在 190°C 和 21.6 kg 负载下测量的熔体质量流动速率 (MFR) 小于 0.1 g/10 分钟的聚乙烯材料。 注：已证实熔体体积流动速率（MVR）对于表征某些 PE-UHMW 材料（例如管道材料）在 230 °C/21.6 kg 测试条件和模具孔径为 3,628 mm 下非常有用。 （参见 ISO 21304-2）。 PE-UHMW 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) 粘度值； b) 伸长应力； c)夏比双缺口冲击强度；以及有关预期应用和/或加工方法、重要特性、添加剂、着色剂、填料和增强材料的信息。 该命名系统适用于所有 PE-UHMW 均聚物和其他 1-烯属单体含量低于 50%（质量）且带官能团的非烯属单体含量的超高分子量乙烯共聚物最多可达质量的 3%。 它适用于正常使用的粉末、颗粒或球团形式的材料，未经改性或经着色剂、填料和其他添加剂改性。 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。 如果需要此类附加属性，则应根据 ISO 21304-2 中规定的测试方法（如果适用）来确定。 为了指定热塑性 PE-UHMW 材料以满足特定规格，数据块 5 中给出了要求（见 4.1）。 [外文原描述]： This document establishes a system of designation for thermoplastic PE-UHMW materials, which can be used as the basis for specifications. For the purposes of this document, PE-UHMW materials are polyethylene materials having a melt mass-flow rate (MFR) of less than 0,1 g/10 min, measured at 190 °C and 21,6 kg load. NOTE It has been confirmed that the melt volume-flow rate (MVR) is useful for characterizing some PE-UHMW materials (e.g. pipe materials) under the test condition of 230 °C/21,6 kg and bore diameter of die with 3,628 mm (see ISO 21304-2). The types of PE-UHMW are differentiated from each other by a classification system based on appropriate levels of the designatory properties: a) viscosity number; b) elongational stress; c) Charpy double-notched impact strength; and on information about the intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials. This designation system is applicable to all PE-UHMW homopolymers and to ultra-high-molecular-weight copolymers of ethylene having a content of other 1-olefinic monomers of less than 50 % by mass and a content of non-olefinic monomers with functional groups up to a maximum of 3 % by mass. It applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or modified by colorants, fillers and other additives. 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. If such additional properties are required, they are intended to be determined in accordance with the test methods specified in ISO 21304-2, if suitable. In order to specify a thermoplastic PE-UHMW material to meet particular specifications, the requirements are to be given in data block 5 (see 4.1).