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Plastics. Ultra-high-molecular-weight polyethylene (PE- UHMW) moulding and extrusion materials-Designation system and basis for specifications 塑料 超高分子量聚乙烯(PE-UHMW)模塑和挤出材料
发布日期: 2019-05-02
范围:本文件建立了热塑性PE-UHMW材料的命名体系,可作为规范的基础。 在本文件中,PE-UHMW材料是指熔体质量流率(MFR)小于0.1 g/10 min的聚乙烯材料,在190摄氏度和21.6千克负荷下测量。 注:已经证实,熔体体积流动速率(MVR)有助于在230°C/21,6 kg的试验条件和3628 mm的模具孔径下表征一些PE-UHMW材料(例如管道材料)(见ISO 21304-2)。 PE-UHMW的类型通过基于适当级别的设计属性的分类系统相互区分: a) 粘度值; b) 拉伸应力; c) 夏比双缺口冲击强度; 以及关于预期用途和/或加工方法、重要性能、添加剂、着色剂、填料和增强材料的信息。 该命名体系适用于所有PE-UHMW均聚物和乙烯超高分子量共聚物,其中,其他1-烯烃单体的质量含量小于50%,非烯烃单体的官能团质量含量最大不超过3%。本标准适用于以粉末、颗粒或颗粒的形式准备好正常使用的材料,未经色素、填料和其他添加剂改性或改性。 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。如果需要此类附加性能,则应根据ISO 21304-2中规定的试验方法(如适用)进行测定。 为了指定热塑性PE-UHMW材料以满足特定规范,数据块5中给出了要求(见4)。 1).交叉引用:ISO 1628-3ISO 5834-1ISO 1043-1ISO 21304-2ISO 1043-2购买本文件时提供的所有现行修订版均包含在购买本文件中。
Scope: 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).Cross References:ISO 1628-3ISO 5834-1ISO 1043-1ISO 21304-2ISO 1043-2All current amendments available at time of purchase are included with the purchase of this document.
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发布单位或类别: 英国-英国标准学会
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