EN ISO 29988-2:2018

• Abstract:

  ISO 29988-2:2018 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of polyoxymethlene (POM) moulding and extrusion materials.; Requirements for handling test materials and for conditioning both the test materials before moulding and the specimens before testing are specified. Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made are given.; Properties and test methods which are suitable and necessary to characterize POM moulding and extrusion materials are listed. The properties have been selected from the general test methods. Other test methods in wide use for, or of particular significance to, these moulding and extrusion materials are also included in this document, as are the designatory properties: melt flow rate and tensile modulus.; In order to obtain reproducible and comparable test results, it is intended to use the methods of preparation and conditioning, the specimen dimensions and the test procedures specified in this document. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.

• Status: Published
• Publication Date: 05-Jun-2018
• Withdrawal Date: 30-Dec-2018
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Jun-2018
• Completion Date: 06-Jun-2018
• Ref Project: SIST EN ISO 29988-2:2018 - Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (ISO 29988-2:2018)

• Replaces: EN ISO 9988-2:2015 - Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (ISO 9988-2:2006)
• Effective Date: 02-Sep-2015
• Refers: ISO 11359-2:1999 - Plastics — Thermomechanical analysis (TMA) — Part 2: Determination of coefficient of linear thermal expansion and glass transition temperature
• Effective Date: 25-Aug-2026
• Refers: IEC 62631-3-2:2015 - Dielectric and resistive properties of solid insulating materials - Part 3-2: Determination of resistive properties (DC methods) - Surface resistance and surface resistivity
• Effective Date: 25-Aug-2026
• Refers: ISO 294-3:2002 - Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates
• Effective Date: 25-Aug-2026
• Refers: ISO 294-4:2001 - Plastics — Injection moulding of test specimens of thermoplastic materials — Part 4: Determination of moulding shrinkage
• Effective Date: 25-Aug-2026
• Refers: ISO 179-2:1997 - Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test
• Effective Date: 25-Aug-2026
• Refers: ISO 294-1:2017 - Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General principles, and moulding of multipurpose and bar test specimens
• Effective Date: 25-Aug-2026
• Refers: ISO 899-1:2017 - Plastics — Determination of creep behaviour — Part 1: Tensile creep
• Effective Date: 25-Aug-2026
• Refers: IEC 62631-3-1:2016 - Dielectric and resistive properties of solid insulating materials - Part 3-1: Determination of resistive properties (DC methods) - Volume resistance and volume resistivity - General method
• Effective Date: 25-Aug-2026
• Refers: IEC 60243-1:2013 - Electric strength of insulating materials - Test methods - Part 1: Tests at power frequencies
• Effective Date: 25-Aug-2026
• Refers: ISO 20753:2008 - Plastics — Test specimens
• Effective Date: 25-Aug-2026
• Refers: ISO 62:2008 - Plastics — Determination of water absorption
• Effective Date: 25-Aug-2026
• Refers: ISO 178:2010 - Plastics — Determination of flexural properties
• Effective Date: 09-Feb-2026
• Refers: IEC 60112:2003 - Method for the determination of the proof and the comparative tracking indices of solid insulating materials
• Effective Date: 09-Feb-2026
• Refers: ISO 179-1:2010 - Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
• Effective Date: 09-Feb-2026

Overview

EN ISO 29988-2:2018 (ISO 29988-2:2018) specifies how to prepare test specimens and determine properties of polyoxymethylene (POM) moulding and extrusion materials. It defines handling, conditioning, injection-moulding procedures and the set of test methods suitable for characterizing POM materials to obtain reproducible and comparable results. The document is intended for laboratories, manufacturers and users who need consistent material data for design, quality control and material comparison.

Key topics and requirements

• Specimen preparation: Specimens shall be produced by injection moulding in accordance with ISO 294 series (ISO 294-1, -3, -4). Consistent processing conditions and specimen geometry are required to ensure comparability.
• Material handling: POM should be stored in moisture‑proof containers until use. No pretreatment is mandatory, but drying (e.g., 4 h at 80 °C in circulating air) can be used to avoid surface defects caused by adsorbed moisture.
• Injection-moulding conditions: Typical melt and mould temperature ranges are given by material type (homopolymer/copolymer, impact‑modified) - e.g., average melt temperatures around 205–215 °C and mould temperatures from about 60–100 °C, with specified injection velocities. (See Table 1 in the standard for detailed conditions.)
• Conditioning: Test specimens must be conditioned per ISO 291 for at least 16 hours at (23 ± 2) °C and (50 ± 10) % RH. Tests in subtropical conditions (27 °C/65 % RH) are permitted but must be reported.
• Determination of properties: The standard lists rheological, mechanical, thermal, electrical, and physical properties appropriate for POM. It designates key properties such as melt mass‑flow rate (MFR) and tensile modulus, and references established test methods (see Related Standards).
• Reproducibility note: Values obtained using these specified specimen dimensions and procedures are intended to be comparable; results may differ if alternative specimen sizes or processing methods are used.

Applications and users

• Material and formulation suppliers validating POM grades
• Injection moulders and extruders establishing processing windows
• QA/QC and testing laboratories generating standardized property data
• OEMs and design engineers selecting POM for components (automotive, consumer goods, electrical parts)
• R&D teams benchmarking materials, and procurement/specification teams creating material datasheets and supplier contracts

Related standards (selected)

• ISO 1133-1 (MFR/MVR), ISO 527-2 (tensile), ISO 178 (flexural), ISO 179 (Charpy impact)
• ISO 294-1 / -3 / -4 (injection moulding of test specimens), ISO 291 (conditioning)
• ISO 62 (water absorption), ISO 1183-1 (density), ISO 11357-3 (DSC), ISO 11359-2 (TMA)
• IEC 60112, IEC 60243-1, IEC 60250 (electrical/dielectric tests)

Keywords: EN ISO 29988-2:2018, ISO 29988-2, POM, polyoxymethylene, moulding and extrusion materials, test specimens, melt flow rate, tensile modulus, conditioning, injection moulding, material testing.

SLOVENSKI STANDARD
01-september-2018
1DGRPHãþD
SIST EN ISO 9988-2:2015
Polimerni materiali - Materiali na osnovi polioksimetilena (POM) za oblikovanje in
ekstrudiranje - 2. del: Priprava preskušancev in ugotavljanje lastnosti (ISO 29988-
2:2018)
Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 2:
Preparation of test specimens and determination of properties (ISO 29988-2:2018)
Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil 2: Herstellung von Probekörpern
und Bestimmung von Eigenschaften (ISO 29988-2:2018)
Plastiques - Matériaux à base de polyoxyméthylène (POM) pour moulage et extrusion -
Partie 2: Préparation des éprouvettes et détermination des propriétés (ISO 29988-
2:2018)
Ta slovenski standard je istoveten z: EN ISO 29988-2:2018
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 29988-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2018
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 9988-2:2015
English Version
Plastics - Polyoxymethylene (POM) moulding and
extrusion materials - Part 2: Preparation of test specimens
and determination of properties (ISO 29988-2:2018)
Plastiques - Matériaux à base de polyoxyméthylène Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil
(POM) pour moulage et extrusion - Partie 2: 2: Herstellung von Probekörpern und Bestimmung von
Préparation des éprouvettes et détermination des Eigenschaften (ISO 29988-2:2018)
propriétés (ISO 29988-2:2018)
This European Standard was approved by CEN on 23 March 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 29988-2:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 29988-2:2018) 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 December 2018, and conflicting national standards
shall be withdrawn at the latest by December 2018.
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 9988-2:2015.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 29988-2:2018 has been approved by CEN as EN ISO 29988-2:2018 without any
modification.
INTERNATIONAL ISO
STANDARD 29988-2
First edition
2018-04
Plastics — Polyoxymethylene (POM)
moulding and extrusion materials —
Part 2:
Preparation of test specimens and
determination of properties
Plastiques — Matériaux à base de polyoxyméthylène (POM) pour
moulage et extrusion —
Partie 2: Préparation des éprouvettes et détermination des propriétés
Reference number
ISO 29988-2:2018(E)
©
ISO 2018
ISO 29988-2:2018(E)
© 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
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Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 29988-2:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Preparation of test specimens . 2
4.1 General . 2
4.2 Treatment of the material before moulding . 3
4.3 Injection moulding . 3
5 Conditioning of test specimens . 3
6 Determination of properties . 3
Bibliography . 6
ISO 29988-2:2018(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 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 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 29988-2 cancels and replaces ISO 9988-2:2006, which has been technically
revised.
A list of all parts in the ISO 29988 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 29988-2:2018(E)
Plastics — Polyoxymethylene (POM) moulding and
extrusion materials —
Part 2:
Preparation of test specimens and determination of
properties
1 Scope
This document
...