GB/T 1844.1-2022Plastics—Symbols and abbreviated terms—Part 1:Basic polymers and their special characteristics (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

This document is Part 1 of GB/T 1844 "Plastics - Symbols and abbreviated terms". The following parts of GB/T 1844 have been issued.

- Part 1: Basic polymers and their special characteristics;

- Part 2: Fillers and reinforcing materials;

- Part 3: Plasticizers;

- Part 4: Tables of hardness values.

This document replaces GB/T 1844.1-2008 "Plastics - Symbols and abbreviated terms - Part 1: Basic polymers and their special characteristics". Compared with GB/T 1844.1-2008, in addition to the structural adjustments and editorial modifications, the main technical changes in this document are as follows.

- Add abbreviations HBV, PBS, PBSA, PCO, PES, PHA, PHB, PLA, PS-S, PS-ST (see Clause 5 of this Edition);

- Add symbols A (adipic acid) and ST (syndiotactic) indicating characteristic properties. Delete the symbols E (elastomer) and H (homogeneous) indicating characteristic properties (see Clause 6 of this Edition; Clause 6 of Edition 2008);

- Add symbols for recycled plastics (see Clause 7 of this Edition).

The modification of this document uses ISO 1043-1:2011 "Plastics - Symbols and abbreviated terms - Part 1: Basic polymers and their special characteristics".

The technical differences between this document and ISO 1043-1:2011 and their reasons are as follows.

- In Clause 1, add the content of "applicable limits" to comply with the provisions of GB/T 1.1-2020;

- Use normative reference GB/T 2035 to replace ISO 472 (see Clause 3) to adapt to the technical conditions in China.

The following editorial changes have been made to this document.

- Incorporate the amendments of ISO 1043-1:2011/AMD 1.2016.The outer margins of the clauses covered are marked with vertical double lines (||);

5 Abbreviated terms for homopolymers, copolymers and natural

polymers

The following list gives the preferred abbreviated terms for plastics materials, using the component symbols given in Annex B. For some established materials, the abbreviated terms are supplemented by symbols for special characteristics as defined in Clause 6.

Other abbreviations for certain polymers often occur and are listed after the material name for ease of reference.