SIST EN ISO 20028-1:2020
(Main)Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 20028-1:2019)
Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 20028-1:2019)
This Standard 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 types of thermoplastic polyester are differentiated from each other by a classification system based on appropriate levels of the designatory properties: a) viscosity number; b) tensile modulus of elasticity; and on information about the intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials. This designation system is applicable to thermoplastic polyester homopolymers and copolymers. It applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or modified by colorants, fillers and other additives. This document does not apply to the saturated polyester/ester and polyether/ester thermoplastic elastomers covered by ISO 20029. It is not intended to imply that materials having the same designation give necessarily the same performance. This document does not provide engineering data, performance data or data on processing conditions which can be required to specify a material. If such additional properties are required, they are intended to be determined in accordance with the test methods specified in ISO 20028-2, if suitable. In order to designate a thermoplastic polyester material to meet particular specifications, the requirements are to be given in data block 5 .
Kunststoffe - Thermoplastische Polyester (TP)-Werkstoffe - Teil 1: Bezeichnungssystem und Basis für Spezifikationen (ISO 20028-1:2019)
Dieses Dokument legt ein Bezeichnungssystem für thermoplastische Polyester(TP)-Werkstoffe fest, das als Grundlage für Spezifikationen angewendet werden kann. Es umfasst Polyester-Homopolymere (Reinpolymerisate) zum Formen und Extrudieren auf Basis von Poly(ethylenterephthalat) (PET), Poly(butylenterephthalat) (PBT), Poly(cyclohexylendimethylenterephthalat) (PCT), Poly(ethylennaphthalat) (PEN), Poly(butylennaphthalat) (PBN) und andere TP Arten sowie Copolyester verschiedener Zusammensetzungen zum Formen und Extrudieren.
Die Arten thermoplastischer Polyester werden mithilfe eines Einteilungssystems voneinander unterschieden, das auf geeigneten Wertebereichen der kennzeichnenden Eigenschaften:
a) Viskositätszahl;
b) Zugelastizitätsmodul;
und auf Angaben über die vorgesehene Anwendung und/oder das vorgesehene Verarbeitungsverfahren, wichtige Eigenschaften, Additive, Farbstoffe, Füll und Verstärkungsstoffe beruht.
Dieses Bezeichnungssystem gilt für thermoplastische Polyester-Homopolymere und Copolymere. Es gilt für gebrauchsfertige Werkstoffe in Form von Pulver, Granulat oder Pellets, nicht modifiziert oder modifiziert mit Farbstoffen, Füllstoffen und anderen Additiven. Dieses Dokument gilt nicht für gesättigte thermoplastische Polyester/Ester und Polyether/Ester-Elastomere, die in ISO 20029 behandelt werden.
Es ist nicht beabsichtigt den Eindruck zu vermitteln, dass Werkstoffe mit gleicher Bezeichnung das gleiche Leistungsverhalten aufweisen. Dieses Dokument enthält keine technischen Daten, Leistungsangaben oder Daten zu Verarbeitungsbedingungen, die erforderlich sein können, um einen Werkstoff zu spezifizieren. Wenn derartige zusätzliche Eigenschaften erforderlich sind, werden diese, sofern geeignet, nach den in ISO 20028 2 festgelegten Prüfverfahren bestimmt.
Um einen thermoplastischen Polyester-Werkstoff so zu bezeichnen, dass er besonderen Spezifikationen entspricht, sind die Anforderungen im Daten-Block 5 anzuführen (siehe 4.1).
Plastiques - Matériaux polyesters thermoplastiques (TP) pour moulage et extrusion - Partie 1: Système de désignation et base de spécification (ISO 20028-1:2019)
Le présent document établit un système de désignation des matériaux polyesters thermoplastiques (TP) qui peut être utilisé comme base pour les spécifications. Elle s'applique aux homopolymères des polyesters pour moulage et extrusion à base de poly(téréphtalate d'éthylène) (PET), de poly(téréphtalate de butylène) (PBT), de poly(téréphtalate de cyclohexylène diméthylène) (PCT), de poly(naphtalate d'éthylène) (PEN), de poly(naphtalate de butylène) (PBN) et autres types de TP, ainsi qu'aux copolyesters de compositions variables pour moulage et extrusion.
Les types de polyesters thermoplastiques sont différenciés les uns des autres par un système de classification fondé sur des niveaux appropriés des propriétés de désignation:
a) indice de viscosité;
b) module d'élasticité en traction;
et des informations sur l'application prévue et/ou la méthode de mise en œuvre, les propriétés importantes, les additifs, les colorants, les charges et les matériaux de renfort.
Ce système de désignation s'applique aux homopolymères et copolymères de polyesters thermoplastiques. Il s'applique aux matériaux prêts à l'emploi sous forme de poudres, grains ou granulés, non modifiés ou modifiés par des colorants, charges et autres additifs. Le présent document ne s'applique pas aux élastomères thermoplastiques à base de copolymères saturés polyester/ester et polyéther/ester couverts par l'ISO 20029.
Le fait que des matériaux aient la même désignation n'implique pas qu'ils présentent nécessairement les mêmes performances. Le présent document ne comporte pas de données sur la conception, les performances ou les conditions de mise en œuvre qui peuvent être exigées pour spécifier un matériau. Si de telles caractéristiques supplémentaires sont nécessaires, elles doivent être déterminées conformément aux méthodes d'essai spécifiées dans l'ISO 20028‑2, s'il y a lieu.
Afin de spécifier un matériau polyester thermoplastique répondant à des spécifications particulières, les exigences doivent être codées dans le bloc de données 5 (voir 4.1).
Polimerni materiali - Materiali za oblikovanje in ekstrudiranje iz plastomernih poliestrov - 1. del: Sistem označevanja in podlage za specifikacije (ISO 20028-1:2019)
Ta standard določa sistem označevanja materialov iz plastomernih poliestrov (TP), ki jih je mogoče uporabiti kot podlago za specifikacije. Zajema poliestrske homopolimere za oblikovanje in ekstrudiranje na osnovi poli(etilen tereftalata) (PET), poli(butilen tereftalata) (PBT), poli(cikloheksilendimetilen tereftalata) (PCT), poli(etilen naftalata) (PEN), poli(butilen naftalata) (PBN) ter druge vrste plastomernih poliestrov in kopoliestrov različnih kompozitov za oblikovanje in ekstrudiranje. Vrste plastomernih poliestrov se ločujejo glede na sistem razvrščanja, ki temelji na ustreznih ravneh označevalnih lastnostih: a) viskoznostnem številu; b) nateznem modulu elastičnosti; in na informacijah o načrtovani uporabi in/ali metodi obdelave, pomembnih lastnostih, aditivih, barvilih, polnilih ter materialih za ojačanje. Ta sistem označevanja se uporablja za plastomerne poliestrske homopolimere in kopolimere. Uporablja se za materiale v obliki praška, granul ali peletov, pripravljenih za običajno uporabo, nespremenjenih ali spremenjenih z barvili, polnili in drugimi aditivi. Ta dokument se ne uporablja za nasičene plastomerne elastomere poliester/ester in polieter/ester iz standarda ISO 20029. Materiali z enako oznako nimajo nujno tudi enakih lastnosti. Ta dokument ne podaja inženirskih podatkov, podatkov o delovanju ali podatkov o pogojih obdelave, ki so mogoče potrebni za določitev materiala. Če so take dodatne lastnosti zahtevane, se določijo v skladu s preskusnimi metodami iz standarda ISO 20028-2, če je to primerno. Da bi se določil material iz plastomernih poliestrov, ki ustreza določenim specifikacijam, se v podatkovnem bloku 5 navedejo dodatne zahteve.
General Information
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Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 20028-1:2020
01-januar-2020
Nadomešča:
SIST EN ISO 20028-1:2017
Polimerni materiali - Materiali za oblikovanje in ekstrudiranje iz plastomernih
poliestrov - 1. del: Sistem označevanja in podlage za specifikacije (ISO 20028-
1:2019)
Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO 20028-1:2019)
Kunststoffe - Thermoplastische Polyester (TP)-Werkstoffe - Teil 1: Bezeichnungssystem
und Basis für Spezifikationen (ISO 20028-1:2019)
Plastiques - Matériaux polyesters thermoplastiques (TP) pour moulage et extrusion -
Partie 1: Système de désignation et base de spécification (ISO 20028-1:2019)
Ta slovenski standard je istoveten z: EN ISO 20028-1:2019
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 20028-1:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 20028-1:2020
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SIST EN ISO 20028-1:2020
EN ISO 20028-1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 20028-1:2017
English Version
Plastics - Thermoplastic polyester (TP) moulding and
extrusion materials - Part 1: Designation system and basis
for specification (ISO 20028-1:2019)
Plastiques - Matériaux polyesters thermoplastiques Kunststoffe - Thermoplastische Polyester (TP)-
(TP) pour moulage et extrusion - Partie 1: Système de Werkstoffe - Teil 1: Bezeichnungssystem und Basis für
désignation et base de spécification (ISO 20028- Spezifikationen (ISO 20028-1:2019)
1:2019)
This European Standard was approved by CEN on 16 September 2019.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20028-1:2019 E
worldwide for CEN national Members.
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SIST EN ISO 20028-1:2020
EN ISO 20028-1:2019 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 20028-1:2020
EN ISO 20028-1:2019 (E)
European foreword
This document (EN ISO 20028-1:2019) has been prepared by Technical Committee ISO/TC 61 "Plastics"
in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by
NBN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 20028-1:2017.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 20028-1:2019 has been approved by CEN as EN ISO 20028-1:2019 without any
modification.
3
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SIST EN ISO 20028-1:2020
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SIST EN ISO 20028-1:2020
INTERNATIONAL ISO
STANDARD 20028-1
Second edition
2019-09
Plastics — Thermoplastic polyester
(TP) moulding and extrusion
materials —
Part 1:
Designation system and basis for
specification
Plastiques — Matériaux polyesters thermoplastiques (TP) pour
moulage et extrusion —
Partie 1: Système de désignation et base de spécification
Reference number
ISO 20028-1:2019(E)
©
ISO 2019
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SIST EN ISO 20028-1:2020
ISO 20028-1:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 20028-1:2020
ISO 20028-1:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Designation system . 2
4.1 General . 2
4.2 Data block 1 . 3
4.3 Data block 2 . 3
4.4 Data block 3 . 4
4.5 Data block 4 . 5
4.5.1 General. 5
4.5.2 Viscosity number . 5
4.5.3 Tensile modulus of elasticity . 6
4.6 Data block 5 . 7
5 Examples of designations . 7
5.1 Designation only . 7
5.2 Designation transformed into a specification .10
Annex A (normative) Designation of thermoplastic polyesters .11
Bibliography .13
© ISO 2019 – All rights reserved iii
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SIST EN ISO 20028-1:2020
ISO 20028-1:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This second edition cancels and replaces the first edition (ISO 20028-1:2017), which has been
technically revised to introduce a new designation system.
The revised designation system is published under a new ISO number, as many existing documents
refer to ISO 7792-1. If the existing ISO 7792-1 would be replaced by the new designation system, these
documents would refer to the incorrect designation system.
A list of all parts in the ISO 20028 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 20028-1:2020
ISO 20028-1:2019(E)
Introduction
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.
© ISO 2019 – All rights reserved v
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SIST EN ISO 20028-1:2020
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SIST EN ISO 20028-1:2020
INTERNATIONAL STANDARD ISO 20028-1:2019(E)
Plastics — Thermoplastic polyester (TP) moulding and
extrusion materials —
Part 1:
Designation system and basis for specification
1 Scope
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 types of thermoplastic polyester are differentiated from each other by a classification system
based on appropriate levels of the designatory properties:
a) viscosity number;
b) tensile modulus of elasticity;
and on information about the intended application and/or method of processing, important properties,
additives, colorants, fillers and reinforcing materials.
This designation system is applicable to thermoplastic polyester homopolymers and copolymers. It
applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or
modified by colorants, fillers and other additives. This document does not apply to the saturated
polyester/ester and polyether/ester thermoplastic elastomers covered by ISO 20029.
It is not intended to imply that materials having the same designation give necessarily the same
performance. This document does not provide engineering data, performance data or data on processing
conditions which can be required to specify a material. If such additional properties are required, they
are intended to be determined in accordance with the test methods specified in ISO 20028-2, if suitable.
In order to designate a thermoplastic polyester material to meet particular specifications, the
requirements are to be given in data block 5 (see 4.1).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1043-2, Plastics — Symbols and abbreviated terms — Part 2: Fillers and reinforcing materials
ISO 1043-4, Plastics — Symbols and abbreviated terms — Part 4: Flame retardants
ISO 1628-5, Plastics — Determination of the viscosity of polymers in dilute solution using capillary
viscometers — Part 5: Thermoplastic polyester (TP) homopolymers and copolymers
© ISO 2019 – All rights reserved 1
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SIST EN ISO 20028-1:2020
ISO 20028-1:2019(E)
ISO 20028-2, Plastics — Thermoplastic polyester (TP) moulding and extrusion materials — Part 2:
Preparation of test specimens and determination of properties
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Designation system
4.1 General
The designation system for thermoplastics is based on the following standardized pattern.
Designation
Description Identity block
Block International Individual item block
(optional) Standard
Number Data block 1 Data block 2 Data block 3 Data block 4 Data block 5
block
The designation consists of an optional description block, reading “Thermoplastics”, and an identity
block comprising the International Standard number and an individual-item block. For unambiguous
designation, the individual-item block is subdivided into five data blocks comprising the following
information.
— Data block 1: Identification of the plastic by its symbol PET, PBT, PCT, PEN, PBN or TP for all such
polyesters and copolyesters in general, in accordance with ISO 1043-1 (see 4.2).
— Data block 2: Position 1: Fillers or reinforcing materials and their nominal content (see 4.3).
Position 2: Flame retardant (see 4.3).
Position 3: Declaration of recyclate (REC) plastics and their contents if
desired (see 4.3).
— Data block 3: Position 1: Intended application and/or method of processing (see 4.4).
Positions 2 to 8: Important properties, additives and supplementary
information (see 4.4).
— Data block 4: Designatory properties (see 4.5).
— Data block 5: For the purpose of specifications, a fifth data block contains appropriate
information (see 4.6).
The first character of the individual item block shall be a hyphen. The five data blocks shall be separated
from each other by a comma. If a data block is not used, this shall be indicated by doubling the separation
sign, i.e. by two commas (,,). Terminal commas may be omitted.
NOTE Data blocks 1 and 2, when separated by a hyphen, form the part marking symbol.
2 © ISO 2019 – All rights reserved
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SIST EN ISO 20028-1:2020
ISO 20028-1:2019(E)
4.2 Data block 1
In this data block, after the hyphen, thermoplastic polyesters are identified using the symbols and
designations listed in Table 1 and Table 2.
Table 1 — Symbols indicating the chemical structure of polyester materials in data block 1
a
Symbol Name and chemical identification
PET, Poly(ethylene terephthalate): polyester based on ethylene glycol and terephthalic acid (or its
TP 2T ester).
PTT, Poly(trimethylene terephthalate): polyester based on 1,3-propanediol and terephthalic acid
TP 3T (or its ester).
PBT, Poly(butylene terephthalate): polyester based on 1,4-butanediol and terephthalic acid (or its
TP 4T ester).
PCT, Poly(cyclohexylenedimethylene terephthalate): polyester based on cyclohexanedimethanol
TP CHT and terephthalic acid (or its ester).
PEN, Poly(ethylene naphthalate): polyester based on ethylene glycol and
TP 2N 2,6-naphthalenedicarboxylic acid (or its ester).
PBN, Poly(butylene naphthalate): polyester based on 1,4-butanediol and
TP 4N 2,6-napht
...
SLOVENSKI STANDARD
oSIST prEN ISO 20028-1:2019
01-februar-2019
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SROLHVWURYGHO 6LVWHPR]QDþHYDQMDLQSRGODJH]DVSHFLILNDFLMH ,62',6
Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO/DIS 20028-1:2018)
Kunststoffe - Thermoplastische Polyester (TP)-Werkstoffe - Teil 1: Bezeichnungssystem
und Basis für Spezifikationen (ISO/DIS 20028-1:2018)
Plastiques - Matériaux polyesters thermoplastiques (TP) pour moulage et extrusion -
Partie 1: Système de désignation et base de spécification (ISO/DIS 20028-1:2018)
Ta slovenski standard je istoveten z: prEN ISO 20028-1
ICS:
83.080.20 Plastomeri Thermoplastic materials
oSIST prEN ISO 20028-1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 20028-1:2019
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oSIST prEN ISO 20028-1:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20028-1
ISO/TC 61/SC 9 Secretariat: KATS
Voting begins on: Voting terminates on:
2018-11-26 2019-02-18
Plastics — Thermoplastic polyester (TP) moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
Plastiques — Matériaux polyesters thermoplastiques (TP) pour moulage et extrusion —
Partie 1: Système de désignation et base de spécification
ICS: 83.080.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 20028-1:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018
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oSIST prEN ISO 20028-1:2019
ISO/DIS 20028-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 20028-1:2019
ISO/DIS 20028-1:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Designation system . 2
4.1 General . 2
4.2 Data block 1 . 3
4.3 Data block 2 . 3
4.4 Data block 3 . 4
4.5 Data block 4 . 5
4.5.1 General. 5
4.5.2 Viscosity number . 5
4.5.3 Tensile modulus of elasticity . 6
4.6 Data block 5 . 7
5 Examples of designations . 7
5.1 Designation only . 7
5.2 Designation transformed into a specification .10
Annex A (normative) Designation of thermoplastic polyesters .11
Bibliography .14
© ISO 2018 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 20028-1:2019
ISO/DIS 20028-1:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This second edition of ISO 20028-1 cancels and replaces ISO 20028-1:2017, which has been technically
revised to introduce a new designation system.
The revised designation system is published under a new ISO number, as many existing documents
refer to ISO 7792-1. If the existing ISO 7792-1 would be replaced by the new designation system, these
documents would refer to the incorrect designation system.
A list of all parts in the ISO 20028 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 20028-1:2019
ISO/DIS 20028-1:2018(E)
Introduction
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.
© ISO 2018 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 20028-1:2019
---------------------- Page: 8 ----------------------
oSIST prEN ISO 20028-1:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 20028-1:2018(E)
Plastics — Thermoplastic polyester (TP) moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
1 Scope
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 types of thermoplastic polyester are differentiated from each other by a classification system
based on appropriate levels of the designatory properties:
a) viscosity number;
b) tensile modulus of elasticity;
and on information about the intended application and/or method of processing, important properties,
additives, colorants, fillers and reinforcing materials.
This designation system is applicable to thermoplastic polyester homopolymers and copolymers. It
applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or
modified by colorants, fillers and other additives. This document does not apply to the saturated
polyester/ester and polyether/ester thermoplastic elastomers covered by ISO 20029.
It is not intended to imply that materials having the same designation give necessarily the same
performance. This document does not provide engineering data, performance data or data on processing
conditions which can be required to specify a material. If such additional properties are required, they
are intended to be determined in accordance with the test methods specified in ISO 20028-2, if suitable.
In order to designate a thermoplastic polyester material to meet particular specifications, the
requirements are to be given in data block 5 (see 4.1).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1043-2, Plastics — Symbols and abbreviated terms — Part 2: Fillers and reinforcing materials
ISO 1043-4, Plastics — Symbols and abbreviated terms — Part 4: Flame retardants
ISO 1628-5, Plastics — Determination of the viscosity of polymers in dilute solution using capillary
viscometers — Part 5: Thermoplastic polyester (TP) homopolymers and copolymers
© ISO 2018 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 20028-1:2019
ISO/DIS 20028-1:2018(E)
ISO 20028-2, Plastics — Thermoplastic polyester (TP) moulding and extrusion materials — Part 2:
Preparation of test specimens and determination of properties
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at http: //www .iso .org/obp
4 Designation system
4.1 General
The designation system for thermoplastics is based on the following standardized pattern.
Designation
Description Identity block
Block International Individual item block
(optional) Standard
number Data block 1 Data block 2 Data block 3 Data block 4 Data block 5
block
The designation consists of an optional description block, reading “Thermoplastics”, and an identity
block comprising the International Standard number and an individual-item block. For unambiguous
designation, the individual-item block is subdivided into five data blocks comprising the following
information.
— Data block 1: Identification of the plastic by its symbol PET, PBT, PCT, PEN, PBN or TP for all such
polyesters and copolyesters in general, in accordance with ISO 1043-1 (see 4.2).
— Data block 2: Position 1: Fillers or reinforcing materials and their nominal content (see 4.3).
Position 2: Flame retardant(see 4.3).
Position 3: Declaration of recyclate (REC) plastics and their contents if
desired(see 4.3).
— Data block 3: Position 1: Intended application and/or method of processing (see 4.4).
Positions 2 to 8: Important properties, additives and supplementary information
(see 4.4).
— Data block 4: Designatory properties (see 4.5).
— Data block 5: For the purpose of specifications, a fifth data block contains appropriate information
(see 4.6).
The first character of the individual item block shall be a hyphen. The five data blocks shall be separated
from each other by a comma. If a data block is not used, this shall be indicated by doubling the separation
sign, i.e. by two commas (,,). Terminal commas may be omitted.
NOTE Data blocks 1 and 2, when separated by a hyphen, form the part marking symbol
2 © ISO 2018 – All rights reserved
---------------------- Page: 10 ----------------------
oSIST prEN ISO 20028-1:2019
ISO/DIS 20028-1:2018(E)
4.2 Data block 1
In this data block, after the hyphen, thermoplastic polyesters are identified using the symbols and
designations listed in Table 1 and Table 2.
Table 1 — Symbols indicating the chemical structure of polyester materials in data block 1
a
Symbol Name and chemical identification
PET, Poly(ethylene terephthalate): polyester based on ethylene glycol and terephthalic acid (or
TP 2T its ester).
PTT, Poly(trimethylene terephthalate): polyester based on 1,3-propanediol and terephthalic acid
TP 3T (or its ester).
PBT, Poly(butylene terephthalate): polyester based on 1,4-butanediol and terephthalic acid (or
TP 4T its ester).
PCT, Poly(cyclohexylenedimethylene terephthalate): polyester based on cyclohexanedimethanol
TP CHT and terephthalic acid (or its ester).
PEN, Poly(ethylene naphthalate): polyester based on ethylene glycol and
TP 2N 2,6-naphthalenedicarboxylic acid (or its ester).
PBN, Poly(butylene naphthalate): polyester based on 1,4-butanediol and
TP 4N 2,6-naphthalenedicarboxylic acid (or its ester).
TP 26 Poly(ethylene adipate): polyester based on ethylene glycol and adipic acid.
TP 4I Poly(butylene isophthalate): polyester based on 1,4-butanediol and isophthalic acid.
TP CH10 Polyester based on cyclohexanedimethanol and sebacic acid.
a
See Annex A (Designation of thermoplastic polyesters).
Table 2 — Symbols indicating the chemical structure of copolyester materials in data block 1
(examples)
a
Symbol Chemical identification
TP 6I/6T Copolyester based on hexanediol, isophthalic acid and terephthalic acid.
TP BAI/BAT Copolyester based on bisphenol A, isophthalic acid and terephthalic acid.
TP 2T/CHT Copolyester based on ethylene glycol, cyclohexanedimethanol and terephthalic acid (or its
derivates).
TP 2T/2I Copolyester based on ethylene glycol, terephthalic acid and isophthalic acid (or its ester).
TP 2/6/NG// Copolyester based on ethylene glycol, 1,6-hexanediol, neopentyl glycol, terephthalic acid,
T/I/6 isophthalic acid and adipic acids.
The following two designations include an indication of the mass content ratio:
TP 2T/26 Copolyester based on 90 % (mass by mass) ethylene glycol and terephthalic acid and 10 % (mass
(90/10) by mass) ethylene glycol and adipic acid.
TP NGT/6I Copolyester based on 75 % (mass by mass) neopentyl glycol and terephthalic acid and 25 %
(75/25) (mass by mass) 1,6-hexanediol and isophthalic acid.
a
See Annex A (Designation of thermoplastic polyesters).
Blends of thermoplastic polyesters or thermoplastic polyesters with other polymers are identified
using the symbols for the basic polymers separated by a plus sign.
EXAMPLE PBT + ASA for a blend of poly(butylene terephthalate) and acr
...
SLOVENSKI STANDARD
oSIST prEN ISO 20028-1:2018
01-november-2018
3ROLPHUQLPDWHULDOL0DWHULDOL]DREOLNRYDQMHLQHNVWUXGLUDQMHL]SODVWRPHUQLK
SROLHVWURYGHO 6LVWHPR]QDþHYDQMDLQSRGODJH]DVSHFLILNDFLMH ,62',6
Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO/DIS 20028-1:2018)
Kunststoffe - Thermoplastische Polyester (TP)-Werkstoffe - Teil 1: Bezeichnungssystem
und Basis für Spezifikationen (ISO/DIS 20028-1:2018)
Plastiques - Matériaux polyesters thermoplastiques (TP) pour moulage et extrusion -
Partie 1: Système de désignation et base de spécification (ISO/DIS 20028-1:2018)
Ta slovenski standard je istoveten z: prEN ISO 20028-1
ICS:
83.080.20 Plastomeri Thermoplastic materials
oSIST prEN ISO 20028-1:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 20028-1:2018
---------------------- Page: 2 ----------------------
oSIST prEN ISO 20028-1:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20028-1
ISO/TC 61/SC 9 Secretariat: KATS
Voting begins on: Voting terminates on:
2018-08-29 2018-11-21
Plastics — Thermoplastic polyester (TP) moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
Plastiques — Matériaux polyesters thermoplastiques (TP) pour moulage et extrusion —
Partie 1: Système de désignation et base de spécification
ICS: 83.080.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 20028-1:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018
---------------------- Page: 3 ----------------------
oSIST prEN ISO 20028-1:2018
ISO/DIS 20028-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 20028-1:2018
ISO/DIS 20028-1:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Designation system . 2
4.1 General . 2
4.2 Data block 1 . 2
4.3 Data block 2 . 3
4.4 Data block 3 . 4
4.5 Data block 4 . 5
4.5.1 General. 5
4.5.2 Viscosity number . 5
4.5.3 Tensile modulus of elasticity . 6
4.6 Data block 5 . 7
5 Examples of designations . 7
5.1 Designation only . 7
5.2 Designation transformed into a specification . 9
Annex A (normative) Designation of thermoplastic polyesters .10
Bibliography .13
© ISO 2018 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 20028-1:2018
ISO/DIS 20028-1:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This first edition of ISO 20028-1 cancels and replaces ISO 7792-1:2012, which has been technically
revised to introduce a new designation system.
The revised designation system is published under a new ISO number, as many existing documents
refer to ISO 7792-1. If the existing ISO 7792-1 would be replaced by the new designation system, these
documents would refer to the incorrect designation system.
In order to give users time to switch from ISO 7792-1 to ISO 20028-1, any designation system according
to ISO 7792-1 is to be phased out in 5 to 10 years.
A list of all parts in the ISO 20028- series can be found on the ISO website.
iv © ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 20028-1:2018
ISO/DIS 20028-1:2018(E)
Introduction
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 simplify the data block system and to connect more to ISO 1043 and ISO 11469,
where the first two blocks are used for generic identification and marking of products.
© ISO 2018 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 20028-1:2018
---------------------- Page: 8 ----------------------
oSIST prEN ISO 20028-1:2018
DRAFT INTERNATIONAL STANDARD ISO/DIS 20028-1:2018(E)
Plastics — Thermoplastic polyester (TP) moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
1 Scope
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 types of thermoplastic polyester are differentiated from each other by a classification system
based on appropriate levels of the designatory properties:
a) viscosity number;
b) tensile modulus of elasticity;
and on information about the intended application and/or method of processing, important properties,
additives, colorants, fillers and reinforcing materials.
This designation system is applicable to thermoplastic polyester homopolymers and copolymers. It
applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or
modified by colorants, fillers and other additives. This document does not apply to the saturated
polyester/ester and polyether/ester thermoplastic elastomers covered by ISO 20029.
It is not intended to imply that materials having the same designation give necessarily the same
performance. This document does not provide engineering data, performance data or data on processing
conditions which can be required to specify a material. If such additional properties are required, they
are intended to be determined in accordance with the test methods specified in ISO 20028-2, if suitable.
In order to designate a thermoplastic polyester material to meet particular specifications, the
requirements are to be given in data block 5 (see 4.1).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1043-2, Plastics — Symbols and abbreviated terms — Part 2: Fillers and reinforcing materials
ISO 1628-5, Plastics — Determination of the viscosity of polymers in dilute solution using capillary
viscometers — Part 5: Thermoplastic polyester (TP) homopolymers and copolymers
ISO 20028-2, Plastics — Thermoplastic polyester (TP) moulding and extrusion materials — Part 2:
Preparation of test specimens and determination of properties
© ISO 2018 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 20028-1:2018
ISO/DIS 20028-1:2018(E)
ASTM D5927, Standard Classification System for and Basis for Specifications for Thermoplastic Polyester
(TPES) Injection and Extrusion Materials Based on ISO Test Methods
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at http: //www .iso .org/obp
4 Designation system
4.1 General
The designation system for thermoplastics is based on the following standardized pattern.
Designation
Description Identity block
Block International Individual item block
(optional) Standard
number Data block 1 Data block 2 Data block 3 Data block 4 Data block 5
block
The designation consists of an optional description block, reading “Thermoplastics”, and an identity
block comprising the International Standard number and an individual-item block. For unambiguous
designation, the individual-item block is subdivided into five data blocks comprising the following
information.
— Data block 1: Identification of the plastic by its symbol PET, PBT, PCT, PEN, PBN or TP for all such
polyesters and copolyesters in general, in accordance with ISO 1043-1 (see 4.2).
— Data block 2: Position 1: Fillers or reinforcing materials and their nominal content (see 4.3).
Position 2: Declaration of recyclate (REC) plastics and their contents if desired.
— Data block 3: Position 1: Intended application and/or method of processing (see 4.4).
Positions 2 to 8: Important properties, additives and supplementary information
(see 4.4).
— Data block 4: Designatory properties (see 4.5).
— Data block 5: For the purpose of specifications, a fifth data block contains appropriate information
(see 4.6).
The first character of the individual item block shall be a hyphen. The five data blocks shall be separated
from each other by a comma. If a data block is not used, this shall be indicated by doubling the separation
sign, i.e. by two commas (,,). Terminal commas may be omitted.
NOTE Data blocks 1 and 2, when separated by a hyphen, form the part marking symbol
4.2 Data block 1
In this data block, after the hyphen, thermoplastic polyesters are identified using the symbols and
designations listed in Table 1 and Table 2.
2 © ISO 2018 – All rights reserved
---------------------- Page: 10 ----------------------
oSIST prEN ISO 20028-1:2018
ISO/DIS 20028-1:2018(E)
Table 1 — Symbols indicating the chemical structure of polyester materials in data block 1
a
Symbol Name and chemical identification
PET, Poly(ethylene terephthalate): polyester based on ethylene glycol and terephthalic acid (or
TP 2T its ester).
PTT, Poly(trimethylene terephthalate): polyester based on 1,3-propanediol and terephthalic acid
TP 3T (or its ester).
PBT, Poly(butylene terephthalate): polyester based on 1,4-butanediol and terephthalic acid (or
TP 4T its ester).
PCT, Poly(cyclohexylenedimethylene terephthalate): polyester based on cyclohexanedimethanol
TP CHT and terephthalic acid (or its ester).
PEN, Poly(ethylene naphthalate): polyester based on ethylene glycol and 2,6-naphthalenedicarbo-
TP 2N xylic acid (or its ester).
PBN, Poly(butylene naphthalate): polyester based on 1,4-butanediol and 2,6-naphthalenedicarbo-
TP 4N xylic acid (or its ester).
TP 26 Poly(ethylene adipate): polyester based on ethylene glycol and adipic acid.
TP 4I Poly(butylene isophthalate): polyester based on 1,4-butanediol and isophthalic acid.
TP CH10 Polyester based on cyclohexanedimethanol and sebacic acid.
a
See Annex A (Designation of thermoplastic polyesters).
Table 2 — Symbols indicating the chemical structure of copolyester materials in data block 1
(examples)
a
Symbol Chemical identification
TP 6I/6T Copolyester based on hexanediol, isophthalic acid and terephthalic acid.
TP BAI/BAT Copolyester based on bisphenol A, isophthalic acid and terephthalic acid.
TP 2T/
...
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