标准编号：ISO 21304-1:2019
中文名称：塑料 超高分子量聚乙烯（PE-UHMW）成型和挤压材料 第1部分：规范的命名系统和依据
英文名称：Plastics — Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials — Part 1: Designation system and basis for specifications
发布日期：2019-03
标准范围
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).
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