GB/T 42918.1-2023: Plastics - Thermoplastic polyurethanes for moulding and extrusion - Part 1: Designation system and basis for specifications

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Scope

This document establishes the designation system for thermoplastic polyurethane
elastomers used in molding and extrusion, AND provides a table of designation codes
for thermoplastic polyurethane elastomers.
This document applies to the designation of all thermoplastic polyurethane elastomer
materials, which are normally used in powder, granular or spherical forms. It serves as
the basis for determining product specifications. These materials are unmodified or
modified with colorants, fillers or additives.
Different types of thermoplastic polyurethanes are distinguished by different grades of
the following properties:
a) Hardness;
b) Tensile elastic modulus (optional).
Information on the alternation of hard and soft segments in the main chain, intended
applications and/or processing methods, important properties, additives, colors, fillers,
reinforcements are also relevant for the designation and classification of thermoplastic
polyurethanes.
This document does not imply that materials designated identically will necessarily
have the same properties. This document does not provide the engineering data,
performance data, processing condition data, which is required to specify the material
for a particular application and/or processing method. When necessary, determine these
additional properties according to the appropriate methods in ISO 16365-2.
In order to describe the special use or recyclable processing of certain thermoplastic
elastomers, additional requirements are given in character group 5 (see 4.1 and 4.6).

Basic Data

Standard ID	GB/T 42918.1-2023 (GB/T42918.1-2023)
Description (Translated English)	Plastics - Thermoplastic polyurethanes for moulding and extrusion - Part 1: Designation system and basis for specifications
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Classification of International Standard	83.080.20
Word Count Estimation	14,133
Date of Issue	2023-08-06
Date of Implementation	2024-03-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration