SIST EN ISO 29988-1:2020

Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 29988-1:2019)

EN-ISO 29988-1 establishes a system of designation for polyoxymethylene (POM) thermoplastic material, which can be used as the basis for specifications. The types of polyoxymethylene plastic are differentiated from each other by a classification system based on appropriate levels of the following designatory properties: a) melt mass-flow rate or melt volume-flow rate; b) tensile modulus, and on information about basic polymer parameters, intended application, method of processing, important properties, additives, colorants, fillers and reinforcing materials. This document is applicable to all polyoxymethylene homopolymers and to copolymers of polyoxymethylene and blends of polymers containing polyoxymethylene. It applies to materials ready for normal use in the form of powder, granules or pellets and to materials unmodified and modified by colorants, additives, fillers, etc. It is not intended to imply that materials having the same designation necessarily give the same performance. This document does not provide engineering data, performance data or data on processing conditions which can be required to specify materials for particular end-use applications. If such additional properties are required, they are to be determined in accordance with the test methods specified by the relevant International Standard.

Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil 1: Bezeichnungssystem und Basis für Spezifikationen (ISO 29988-1:2019)

Dieses Dokument legt ein Bezeichnungssystem für Polyoxymethylen (POM) Thermoplast Werkstoff fest, das als Grundlage für Spezifikationen verwendet werden kann.
ANMERKUNG   Polyoxymethylen-Werkstoffe sind thermoplastische Werkstoffe, die grundsätzlich aus langkettigen synthetischen Homopolymeren und Copolymeren aus Formaldehyd bestehen. Die wiederkehrende Einheit in der molekularen Kette ist — CH2O — als integraler Bestandteil der Hauptpolymerkette, die aus der Polymerisation von Formaldehyd entstanden ist.
Die Arten der Polyoxymethylen Kunststoffe werden mit Hilfe eines Einteilungssystems voneinander unterschieden, das auf geeigneten Wertebereichen der folgenden kennzeichnenden Eigenschaften beruht:
a)   Schmelze-Massefließrate oder Schmelze-Volumenfließrate;
b)   Zugelastizitätsmodul, und auf Angaben über die grundlegenden Polymerparameter, die vorgesehene Anwendung, das Verarbeitungsverfahren, wichtige Eigenschaften, Zusatzstoffe, Farbstoffe, Füll- und Verstärkungsstoffe.
Dieses Dokument ist für alle Polyoxymethylen-Homopolymere und für Copolymere von Polyoxymethylen anwendbar sowie für Mischungen von Polymeren, die Polyoxymethylen enthalten. Es gilt für gebrauchs-fertige Werkstoffe in Form von Pulver, Granulat oder Pellets und für unmodifizierte oder mit Farbstoffen, Zusatzstoffen und Füllstoffen usw. modifizierte Werkstoffe. Es soll nicht unterstellt werden, dass Werkstoffe mit gleicher Bezeichnung notwendigerweise das gleiche Leistungsverhalten aufweisen.
Dieses Dokument enthält keine technischen Daten, Leistungsangaben oder Angaben zu Verarbeitungsbedingungen, die zur Spezifikation eines Werkstoffs für bestimmte Endanwendungen erforderlich sein können. Wenn derartige zusätzliche Eigenschaften erforderlich sind, müssen sie in Übereinstimmung mit den Prüfverfahren aus der entsprechenden Internationalen Norm festgelegt werden.

Plastiques - Matériaux à base de polyoxyméthylène (POM) pour moulage et extrusion - Partie 1: Système de désignation et base de spécification (ISO 29988-1:2019)

Le présent document établit un système de désignation des matériaux thermoplastiques à base de polyoxyméthylène (POM) qui peut être utilisé comme base pour les spécifications.
NOTE       Les matériaux à base de polyoxyméthylène sont des matériaux thermoplastiques composés principalement d'homopolymères et de copolymères de synthèse, à longue chaîne, du formaldéhyde. Le motif de répétition dans la chaîne moléculaire est ? CH2O ?; il fait partie intégrante de la chaîne polymère principale résultant de la polymérisation du formaldéhyde.
Les types de plastiques à base de polyoxyméthylène sont différenciés les uns des autres par un système de classification basé sur les niveaux appropriés des propriétés de désignation suivantes:
a)    indice de fluidité à chaud en masse ou indice de fluidité à chaud en volume;
b)    module en traction; et sur des informations concernant les paramètres relatifs au polymère de base, l'application prévue, la méthode de mise en œuvre, les propriétés importantes, les additifs, les colorants, les charges et les matériaux de renfort.
Le présent document est applicable à tous les homopolymères du polyoxyméthylène ainsi qu'aux copolymères du polyoxyméthylène et aux mélanges de polymères contenant du polyoxyméthylène. Il s'applique aux matériaux prêts à l'emploi dans le cadre d'une utilisation normale sous la forme de poudre, granulés ou grains et aux matériaux non modifiés ou modifiés par des colorants, additifs, charges, etc. 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 des matériaux pour une application finale particulière. Si de telles caractéristiques supplémentaires sont nécessaires, elles sont déterminées conformément aux méthodes d'essai spécifiées par les Normes Internationales pertinentes.

Polimerni materiali - Materiali na osnovi polioksimetilena (POM) za oblikovanje in ekstrudiranje - 1. del: Sistem označevanja in podlage za specifikacije (ISO 29988-1:2019)

Ta del standarda EN-ISO 29988-1 določa sistem označevanja za plastomerni material na osnovi polioksimetilena (POM), ki ga je mogoče uporabiti kot podlago za specifikacije. Različne vrste polioksimetilenske plastike se ločujejo glede na sistem razvrščanja, ki temelji na ustreznih ravneh naslednjih lastnosti: a) masnega pretoka taline ali volumenskega pretoka taline; b) nateznega modula in podatkov o osnovnih parametrih polimerov, načrtovani uporabi, metodi obdelave, pomembnih lastnostih, aditivih, barvilih, polnilih ter materialih za ojačanje. Ta dokument se uporablja za vse homopolimere na osnovi polioksimetilena ter za kopolimere na osnovi polioksimetilena in mešanice polimerov, ki vsebujejo polioksimetilen. Uporablja se za materiale v obliki praška, granul ali peletov, pripravljene za običajno uporabo, in materiale, nespremenjene ali spremenjene z barvili, aditivi, polnili itd. Materiali z enako oznako nimajo nujno tudi enakih lastnosti. Ta dokument ne podaja inženirskih podatkov, podatkov o lastnostih ali podatkov o pogojih obdelave, ki so mogoče potrebni za določitev materialov za posamezno vrsto končne uporabe. Če so take dodatne lastnosti zahtevane, se določijo v skladu s preskusnimi metodami, opredeljenimi v ustreznih mednarodnih standardih.

General Information

• Status: Published
• Public Enquiry End Date: 09-Oct-2019
• Publication Date: 14-Jan-2020
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Dec-2019
• Due Date: 05-Mar-2020
• Completion Date: 15-Jan-2020
• Ref Project: EN ISO 29988-1:2019 - Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 29988-1:2019)

Relations

• Revised: SIST EN ISO 29988-1:2018 - Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 29988-1:2018)
• Effective Date: 30-Jan-2019
• Replaces: SIST EN ISO 29988-1:2018 - Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 29988-1:2018)
• Effective Date: 25-Dec-2019
• Replaces: SIST EN ISO 29988-1:2018 - Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 29988-1:2018)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 29988-1:2020
01-marec-2020
Nadomešča:
SIST EN ISO 29988-1:2018
Polimerni materiali - Materiali na osnovi polioksimetilena (POM) za oblikovanje in
ekstrudiranje - 1. del: Sistem označevanja in podlage za specifikacije (ISO 29988-
1:2019)
Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO 29988-1:2019)
Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil 1: Bezeichnungssystem und
Basis für Spezifikationen (ISO 29988-1:2019)
Plastiques - Matériaux à base de polyoxyméthylène (POM) pour moulage et extrusion -
Partie 1: Système de désignation et base de spécification (ISO 29988-1:2019)
Ta slovenski standard je istoveten z: EN ISO 29988-1:2019
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 29988-1:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 29988-1:2020

---------------------- Page: 2 ----------------------
SIST EN ISO 29988-1:2020


EN ISO 29988-1
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2019
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 29988-1:2018
English Version

Plastics - Polyoxymethylene (POM) moulding and
extrusion materials - Part 1: Designation system and basis
for specifications (ISO 29988-1:2019)
Plastiques - Matériaux à base de polyoxyméthylène Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil
(POM) pour moulage et extrusion - Partie 1: Système 1: Bezeichnungssystem und Basis für Spezifikationen
de désignation et base de spécification (ISO 29988- (ISO 29988-1:2019)
1:2019)
This European Standard was approved by CEN on 11 November 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 29988-1:2019 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN ISO 29988-1:2020
EN ISO 29988-1:2019 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 29988-1:2020
EN ISO 29988-1:2019 (E)
European foreword
This document (EN ISO 29988-1:2019) 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 June 2020, and conflicting national standards shall be
withdrawn at the latest by June 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 29988-1:2018.
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 29988-1:2019 has been approved by CEN as EN ISO 29988-1:2019 without any
modification.

3

---------------------- Page: 5 ----------------------
SIST EN ISO 29988-1:2020

---------------------- Page: 6 ----------------------
SIST EN ISO 29988-1:2020
INTERNATIONAL ISO
STANDARD 29988-1
Second edition
2019-11
Plastics — Polyoxymethylene (POM)
moulding and extrusion materials —
Part 1:
Designation system and basis for
specifications
Plastiques — Matériaux à base de polyoxyméthylène (POM) pour
moulage et extrusion —
Partie 1: Système de désignation et base de spécification
Reference number
ISO 29988-1:2019(E)
©
ISO 2019

---------------------- Page: 7 ----------------------
SIST EN ISO 29988-1:2020
ISO 29988-1:2019(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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 29988-1:2020
ISO 29988-1:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation and specification system . 2
4.1 General . 2
4.2 Data block 1 . 2
4.3 Data block 2 . 3
4.4 Data block 3 . 3
4.5 Data block 4 . 4
4.5.1 General. 4
4.5.2 Melt flow rate . 4
4.5.3 Tensile modulus . 5
4.6 Data block 5 . 5
5 Examples of designations . 5
5.1 Designation only . 5
5.2 Designation transformed into a specification . 6
5.3 Designation transformed into a specification for polymer mixture case . 7
Bibliography . 8
© ISO 2019 – All rights reserved iii

---------------------- Page: 9 ----------------------
SIST EN ISO 29988-1:2020
ISO 29988-1:2019(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 29988-1:2018), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— 4.5.2 and 5.3 have been revised.
A list of all parts in the ISO 29988 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

---------------------- Page: 10 ----------------------
SIST EN ISO 29988-1:2020
INTERNATIONAL STANDARD ISO 29988-1:2019(E)
Plastics — Polyoxymethylene (POM) moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
1 Scope
This document establishes a system of designation for polyoxymethylene (POM) thermoplastic
material, which can be used as the basis for specifications.
NOTE Polyoxymethylene materials are thermoplastic materials composed principally of long-chain
synthetic homopolymers and copolymers
...

SLOVENSKI STANDARD
oSIST prEN ISO 29988-1:2019
01-oktober-2019
Polimerni materiali - Materiali na osnovi polioksimetilena (POM) za oblikovanje in
ekstrudiranje - 1. del: Sistem označevanja in podlage za specifikacije (ISO/FDIS
29988-1:2019)
Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO/FDIS 29988-1:2019)
Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil 1: Bezeichnungssystem und
Basis für Spezifikationen (ISO/FDIS 29988-1:2019)
Plastiques - Matériaux à base de polyoxyméthylène (POM) pour moulage et extrusion -
Partie 1: Système de désignation et base de spécification (ISO/FDIS 29988-1:2019)
Ta slovenski standard je istoveten z: prEN ISO 29988-1
ICS:
83.080.20 Plastomeri Thermoplastic materials
oSIST prEN ISO 29988-1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 29988-1:2019

---------------------- Page: 2 ----------------------
oSIST prEN ISO 29988-1:2019
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 29988-1
ISO/TC 61/SC 9
Plastics — Polyoxymethylene (POM)
Secretariat: KATS
moulding and extrusion materials —
Voting begins on:
2019-07-18
Part 1:
Voting terminates on:
Designation system and basis for
2019-10-10
specifications
Plastiques — Matériaux à base de polyoxyméthylène (POM) pour
moulage et extrusion —
Partie 1: Système de désignation et base de spécification
ISO/CEN PARALLEL PROCESSING
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 29988-1:2019(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2019

---------------------- Page: 3 ----------------------
oSIST prEN ISO 29988-1:2019
ISO/FDIS 29988-1:2019(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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 29988-1:2019
ISO/FDIS 29988-1:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation and specification system . 2
4.1 General . 2
4.2 Data block 1 . 2
4.3 Data block 2 . 3
4.4 Data block 3 . 3
4.5 Data block 4 . 4
4.5.1 General. 4
4.5.2 Melt flow rate . 4
4.5.3 Tensile modulus . 5
4.6 Data block 5 . 5
5 Examples of designations . 5
5.1 Designation only . 5
5.2 Designation transformed into a specification . 6
5.3 Designation transformed into a specification for polymer mixture case . 7
Bibliography . 8
© ISO 2019 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 29988-1:2019
ISO/FDIS 29988-1:2019(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 29988-1:2018), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— 4.5.2 and 5.3 have been revised.
A list of all parts in the ISO 29988 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

---------------------- Page: 6 ----------------------
oSIST prEN ISO 29988-1:2019
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 29988-1:2019(E)
Plastics — Polyoxymethylene (POM) moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
1 Scope
This document establishes a system of designation for polyoxymethylene (POM) thermoplastic
material, which can be used as the basis for specifications.
NOTE Polyoxymethylene materials are thermoplastic materials composed principally of long-chain
synthetic homopolymers and copolymers of formaldehyde. The repeating unit in the molecular chain is – CH O –
2
as an integral part of the main polymer chain resulting from polymerization of formaldehyde.
The types of polyoxymethylene plastic are differentiated from each other by a classification system
based on appropriate levels of the following designatory properties:
a) melt mass-flow rate or melt volume-flow rate;
b) tensile modulus, and on information about basic polymer parameters, intended application, method
of processing, important properties, additives, colorants, fillers and reinforcing materials.
This document is applicable to all polyoxymethylene homopolymers and to copolymers of
polyoxymethylene and blends of polymers containing polyoxymethylene. It applies to materials ready
for normal use in the form of powder, granules or pellets and to materials unmodified and modified by
colorants, additives, fillers, etc. It is not intended to imply that materials having the same designation
necessarily give the same performance.
This document does not provide engineering data, performance data or data on processing conditions
which can be required to specify materials for particular end-use applications. If such additional
properties are required, they are to be determined in accordance with the test methods specified by
the relevant International Standard.
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 a
...