DIN EN ISO 20028-1:2017-07

ISO 7792-1 is complex and does not fit with daily practice anymore. In practice, ISO 1043 and ISO 11469 are, in combination, “improperly” being used as a designation system for, for example, marking. The aim of this revision is to add an information about flame retardant in the second position of the second block and to connect more to ISO 1043 and ISO 11469, where the first two blocks are used for generic identification and marking of products. This document establishes a system of designation for thermoplastic polyester (TP) material, which can be used as the basis for specifications. It covers polyester homopolymers for moulding and extrusion based on poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT), poly(cyclohexylenedimethylene terephthalate) (PCT), poly(ethylene naphthalate) (PEN), poly(butylene naphthalates) (PBN) and other TP-types and copolyesters of various compositions for moulding and extrusion. The responsible German standardization committee for this standard is Working Committee NA 054-02-10 AA "Thermoplast-Formmassen" ("Thermoplastic materials") at DIN Standards Committee Plastics (FNK).