1 Scope
This part of GB/T 1844 provides abbreviated terms for the basic polymers used in plastics, symbols for components of these terms, and symbols for special characteristics of plastics. It includes only those abbreviated terms that have come into established use and its aim is both to prevent the occurrence of more than one abbreviated term for a given plastic and to prevent a given abbreviated term being interpreted in more than one way.
Note 1: For symbols for fillers and reinforcing materials see ISO 1043-2; for plasticizers see ISO 1043-3; and for flame retardants see GB/T 1844.4. Nomenclature for rubbers and latices is given in ISO 1629 Rubber and Latices - Nomenclature. Nomenclature for thermoplastic elastomers is given in ISO 18064 Thermoplastic Elastomers - Abbreviated Terms and Nomenclature.
Note 2: Guidance for the preparation of new abbreviated terms is given in Annex A, and reference lists of symbols for the components of plastics terms used to form the abbreviated terms for plastics are given in Annex B.
2 Normative References
The following normative document contains provisions which, through reference in this text, constitute provisions of this part of GB/T 1844. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2035-2008 Terms and Definitions for Plastics (ISO 472-1999, IDT)
ISO 1874-1:1992 Plastics - Polyamide (PA) Moulding and Extrusion Materials – Part 1: Designation
3 Terms and Definitions
For the purposes of this part of GB/T 1844, the terms and definitions given in GB/T 2035-2008 and the following term and definition apply.
3.1
abbreviated term
term resulting from the omission of any part of a term while designating the same concept
4 Use of Symbols and Abbreviated Terms
4.1 Abbreviated terms for homopolymeric, copolymeric and natural polymeric materials are given in Chapter 5, and symbols for special characteristics are given in Chapter 6. Examples of the use of abbreviated terms are given in Chapter 7.
4.2 To distinguish the essential molecular characteristics within a given generic type of plastics material, additional symbols, with guidance for their use, are provided. The use of symbols for describing properties that can only be ascertained subjectively should be avoided since this can lead to confusion.
4.3 The abbreviated terms are primarily intended to be convenient shorthand for chemical names in publications and other written matter. They are not intended for the selection of materials. The abbreviated terms also are useful for indicating the type of basic polymer in materials and products, e.g. ABS moulding material, PA film, PE sheeting and PVC pipe.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Use of Symbols and Abbreviated Terms
5 Abbreviated Terms for Homopolymeric, Copolymeric and Natural Polymeric Materials
6 Symbols for Indication of Special Characteristics
7 Examples of Use of Symbols
Annex A (Informative) Guide for Preparing New Abbreviated Terms for Basic Polymers, Mixtures of Polymers and Related Terms
Annex B (Informative) List of Symbols Used for Components of Abbreviated Terms
