GB/T 22271.1-2021: Plastics - Polyoxymethylene(POM) moulding and extrusion materials - Part 1: Designation system and basis for specification

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Scope

This document specifies a designation system for thermoplastic polyoxymethylene
(POM) molding and extrusion materials. This designation system can serve as a basis
for classification.
Note: The polyoxymethylene material is a thermoplastic material, which is mainly composed
of long chains of homopolymers and copolymers, as synthesized from formaldehyde. The
repeating unit in the molecular chain is -CH2O-, which is an integral part of the main polymer
chain as produced by the polymerization of formaldehyde.
Different types of polyoxymethylene materials are distinguished, based on a
classification system, by specified characteristic property values (melt mass flow rate
or melt volume flow rate, tensile modulus of elasticity), as well as basic polymer
parameters, recommended uses, processing methods, important properties, additives,
colorants, fillers, reinforcements, etc.
This document applies to all materials, which contain polyoxymethylene
homopolymers, copolymers, polyoxymethylene blends. It is suitable for general powder,
granular or flake materials, as well as unmodified and modified materials with colorants,
additives, fillers, etc. This document does not imply that, identically named materials
necessarily have identical properties.
This document does not provide engineering data, performance data, processing
condition data, of the end-application specific material. When necessary, these
additional properties can be determined, according to the test methods specified in the
relevant international standards.

Basic Data

Standard ID	GB/T 22271.1-2021 (GB/T22271.1-2021)
Description (Translated English)	Plastics - Polyoxymethylene(POM) moulding and extrusion materials - Part 1: Designation system and basis for specification
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Word Count Estimation	10,144
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration