1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Plastics - Polyoxymethylene (POM) moulding and extrusion materialsPart 2: Preparation of test specimens and determination of propertiesBS EN ISO 29988-2:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 29988
2、-2 June 2018 ICS 83.080.20 Supersedes EN ISO 9988-2:2015English Version Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (ISO 29988-2:2018) Plastiques - Matriaux base de polyoxymthylne (POM) pour moulage et ext
3、rusion - Partie 2: Prparation des prouvettes et dtermination des proprits (ISO 29988-2:2018) Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil 2: Herstellung von Probekrpern und Bestimmung von Eigenschaften (ISO 29988-2:2018) This European Standard was approved by CEN on 23 March 2018. CEN membe
4、rs 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 applicatio
5、n 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 Manageme
6、nt 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, L
7、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de l
8、a Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 29988-2:2018 ENational forewordThis British Standard is the UK implementation of EN ISO 29988-2:2018. It is identical to ISO 29988-2:2018. It su
9、persedes BS EN ISO 9988-2:2015, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic materials.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to inclu
10、de all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 97104 4ICS 83.080.20Compliance with a British Standard cannot confer immunity from legal obligations.This Bri
11、tish Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 29988-2:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 29988-2 June 2018 ICS 83.080.2
12、0 Supersedes EN ISO 9988-2:2015English Version Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (ISO 29988-2:2018) Plastiques - Matriaux base de polyoxymthylne (POM) pour moulage et extrusion - Partie 2: Prpara
13、tion des prouvettes et dtermination des proprits (ISO 29988-2:2018) Kunststoffe - Polyoxymethylen (POM)-Werkstoffe - Teil 2: Herstellung von Probekrpern und Bestimmung von Eigenschaften (ISO 29988-2:2018) This European Standard was approved by CEN on 23 March 2018. CEN members are bound to comply wi
14、th 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 Mana
15、gement 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 st
16、atus 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, Mal
17、ta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brus
18、sels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 29988-2:2018 EBS EN ISO 29988-2:2018EN ISO 29988-2:2018 (E) 3 European foreword This document (EN ISO 29988-2:2018) has been prepared by Technical Committee ISO/TC 61 “P
19、lastics“ 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 nat
20、ional 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 99
21、88-2:2015. 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,
22、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
23、 CEN as EN ISO 29988-2:2018 without any modification. BS EN ISO 29988-2:2018ISO 29988-2:2018(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 24 Preparation of test specimens 24.1 General . 24.2 Treatment of the material before moulding 34.3 Injection moulding . 35 Condition
24、ing of test specimens . 36 Determination of properties 3Bibliography 6 ISO 2018 All rights reserved iiiContents PageBS EN ISO 29988-2:2018ISO 29988-2:2018(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). Th
25、e 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-gov
26、ernmental, 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
27、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 th
28、e 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
29、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 r
30、elated to conformity assessment, as well as information about ISOs 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, Subcom
31、mittee 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 reservedBS EN ISO 29988-2:2018INTERNATIONAL STANDARD ISO
32、29988-2:2018(E)Plastics Polyoxymethylene (POM) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties1 ScopeThis document specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of polyoxymet
33、hlene (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 o
34、f 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 parti
35、cular 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
36、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.2 Normative referencesThe following documents are referred to in the text in su
37、ch 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 62, Plastics Determination of water absorptionISO 7
38、5-2, Plastics Determination of temperature of deflection under load Part 2: Plastics and eboniteISO 178, Plastics Determination of flexural propertiesISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact testISO 179-2, Plastics Determination of Charpy impact p
39、roperties Part 2: Instrumented impact testISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimensISO 294-3, Plastics Injection moulding of test specimens of thermoplastic materials Part 3: Sma
40、ll platesISO 294-4, Plastics Injection moulding of test specimens of thermoplastic materials Part 4: Determination of moulding shrinkageISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 2018 All rights reserved 1BS EN ISO 29988-2:
41、2018ISO 29988-2:2018(E)ISO 899-1, Plastics Determination of creep behaviour Part 1: Tensile creepISO 1133-1, Plastics Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics Part 1: Standard methodISO 1183-1, Plastics Methods for determining the density of no
42、n-cellular plastics Part 1: Immersion method, liquid pyknometer method and titration methodISO 10350-1, Plastics Acquisition and presentation of comparable single-point data Part 1: Moulding materialsISO 11357-3, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature a
43、nd enthalpy of melting and crystallizationISO 11359-2, Plastics Thermomechanical analysis (TMA) Part 2: Determination of coefficient of linear thermal expansion and glass transition temperatureISO 20753, Plastics Test specimensIEC 60112, Method for the determination of the proof and the comparative
44、tracking indices of solid insulating materialsIEC 60243-1, Electrical strength of insulating materials Test methods Part 1: Tests at power frequenciesIEC 60250, Recommended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulating materials at power
45、, audio and radio frequencies including metre wavelengthsIEC 60296, Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgearIEC 62631-3-1, Dielectric and resistive properties of solid insulating materials Part 3-1: Determination of resistive properties
46、(DC methods) Volume resistance and volume resistivity General methodIEC 62631-3-2, Dielectric and resistive properties of solid insulating materials Part 3-2: Determination of resistive properties (DC methods) Surface resistance and surface resistivity3 Terms and definitionsNo terms and definitions
47、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 https: /www .iso .org/obp4 Preparation of test specimens4.1 Genera
48、lSpecimens shall be prepared by injection moulding. It is essential that they are always prepared by the same procedure, using the same processing conditions. The standard conditions are given in Table 1.The material shall be kept in moisture-proof containers until it is required for use.2 ISO 2018
49、All rights reservedBS EN ISO 29988-2:2018ISO 29988-2:2018(E)4.2 Treatment of the material before mouldingNo pretreatment of the material sample is necessary before processing.NOTE POM moulding materials adsorb moisture on the surface of the particles, which can lead to surface defects in moulded specimens. To ensure mouldings are free of surface defects, the material can be dried for 4 h at 80 C in a circulating air environment.4.3 Injection mouldingSpecimen
