GB/T 42918.1-2023 English PDF (GBT42918.1-2023)

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).