1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Plastics - Polyoxymethylene (POM) moulding and extrusion materialsPart 1: Designation system and basis for specificationsBS EN ISO 299881:2018National forewordThis British Standard is the UK implementation of EN ISO 299
2、881:2018. It is identical to ISO 299881:2018. It supersedes BS EN ISO 99881:2006, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic materials.A list of organizations represented on this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 se
3、cretary.This publication does not purport to include 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 97105 1ICS 83.080.20Compliance with a British Standard cann
4、ot confer immunity from legal obligations.This British 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 299881:2018EUROPEAN STANDARDNORME EUROPENNEEUROPI
5、SCHE NORMEN ISO 29988-1June 2018ICS 83.080.20 Supersedes EN ISO 99881:2006EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 299881:2018: EAll rights of exploitati
6、on in any form and by any means reserved worldwide for CEN national MembersPlastics Polyoxymethylene (POM) moulding and extrusion materials Part 1: Designation system and basis for specifications (ISO 299881:2018)Plastiques Matriaux base de polyoxymthylne (POM) pour moulage et extrusion Partie 1: Sy
7、stme de dsignation et base de spcification (ISO 29988-1:2018)Kunststoffe Polyoxymethylen (POM)Werkstoffe Teil 1: Bezeichnungssystem und Basis fr Spezifikationen (ISO 29988-1:2018)This European Standard was approved by CEN on 23 March 2018.CEN members are bound to comply with the CEN/CENELEC Internal
8、 Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN me
9、mber.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.C
10、EN 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,
11、 Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 29988-1:2018 (E)European forewordThis document (EN ISO 299881:2018) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/
12、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 Dece
13、mber 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 99881:2006.According to the CENCENELEC Internal Regulations,
14、 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, La
15、tvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 299881:2018 has been approved by CEN as EN ISO 299881:2018 without any modification.iiBS EN ISO
16、299881:2018ISO 29988-1:2018Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Designation and specification system 24.1 General . 24.2 Data block 1 . 24.3 Data block 2 . 34.4 Data block 3 . 34.5 Data block 4 . 44.5.1 General 44.5.2 Melt flow rate 44.5.3 Tensile
17、modulus 54.6 Data block 5 . 55 Examples of designations 55.1 Designation only 55.2 Designation transformed into a specification 65.3 Designation transformed into a specification for polymer mixture case . 7Bibliography 8 ISO 2018 All rights reserved iiiContents PageBS EN ISO 299881:2018ISO 29988-1:2
18、018ForewordISO (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
19、 technical committee has been established has the right to be represented on that committee. International organizations, governmental and nongovernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matter
20、s 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 docu
21、ment 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 su
22、ch 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 doe
23、s 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 ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trad
24、e (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 29988-1 cancels and replaces ISO 9988-1:2004, which has been technically revised to introduce a new
25、 designation system.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 299881:2018ISO 29988-1:2018IntroductionPolyoxymethylene materials are thermoplastic materials composed principally of longchain synthetic homopolymers and copolyme
26、rs of formaldehyde. The repeating unit in the molecular chain is CH2O as an integral part of the main polymer chain resulting from polymerization of formaldehyde. ISO 2018 All rights reserved vBS EN ISO 299881:2018This page deliberately left blankPlastics - Polyoxymethylene (POM) moulding and extrus
27、ion materials Part 1: Designation system and basis for specifications1 ScopeThis document establishes a system of designation for polyoxymethylene (POM) thermoplastic materials, which can be used as the basis for specifications.The types of polyoxymethylene (POM) materials are differentiated from ea
28、ch 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, c
29、olorants, 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 materi
30、als 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
31、specify materials for particular enduse applications. If such additional properties are required, they are intended to be determined in accordance with the test methods specified in the relevant International Standards.2 Normative referencesThe following documents are referred to in the text in such
32、 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 10431, Plastics Symbols and abbreviated terms Part 1:
33、 Basic polymers and their special characteristicsISO 11331, Plastics Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics Part 1: Standard methodISO 299882, Plastics Polyoxymethylene (POM) moulding and extrusion materials Part 2: Preparation of test specim
34、ens and determination of properties3 Terms and definitionsNo terms and definitions are listed in this document.INTERNATIONAL STANDARD ISO 29988-1:2018 ISO 2018 All rights reserved 1BS EN ISO 299881:2018ISO 29988-1:2018ISO and IEC maintain terminological databases for use in standardization at the fo
35、llowing addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at https:/www.iso.org/obp4 Designation and specification system4.1 GeneralThe designation and specification system for thermoplastics is based on the following standardized pattern:D
36、esignationDesignation blockIdentity blockInternational Standard number blockIndividual-item blockData block 1Data block 2Data block 3Data block 4Data block 5The designation consists of an optional description block, reading “Thermoplastics”, and an identity block comprising the International Standar
37、d number and an individualitem 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 POM in accordance with ISO 1043-1 and information about the polymerization p
38、rocess or composition of the polymer (see 4.2).Data block 2: Fillers or reinforcing materials and their nominal content (see 4.3).Data block 3: Position 1: Intended application or method of processing (see 4.4).Positions 2 to 8: Important properties, additives, and supplementary information (see 4.4
39、).Data block 4: Designatory properties (see 4.5).Data block 5: For the purpose of specifications, a fifth data block can be added containing additional information (see 4.6).The first character of the individual-item block shall be a hyphen. The data blocks shall be separated from each other by comm
40、as.If a data block is not used, this shall be indicated by doubling the separation sign, i.e. by two commas (,).NOTE Data blocks 1 and 2 together form the part marking symbol.4.2 Data block 1In this data block, after the hyphen, polyoxymethylene plastics are identified by the symbol “POM”, in accord
41、ance with ISO 10431, followed by a hyphen and the codeletter H for homopolymers or K for copolymers.Blends can be made from materials mentioned in ISO 10431 and/or other polymers. For polymer blends or alloys, use the abbreviated terms for the basic polymers, with the main component in first place f
42、ollowed by the other components in descending order according to their mass fractions, separated by a plus sign and no space before or after the plus sign.EXAMPLE A blend of polyoxymethylene homopolymer and polyethylene is designated: POMH+PE.2 ISO 2018 All rights reservedBS EN ISO 299881:2018ISO 29
43、988-1:20184.3 Data block 2In this data block, the type of filler and/or reinforcing material is represented by a single code-letter in position 1 and its physical form by a second code-letter in position 2, the code-letters being as specified in Table 1. Subsequently (without a space), the mass cont
44、ent can be given by a 2-figure number in positions 3 and 4.Table 1 Code-letters for fillers and reinforcing materials in data block 2Code-letter MaterialaCode-letter FormA AramidB Boron B Balls, beads, spheresC Carbon D PowderF FibreG Glass G GroundH WhiskersK Calcium carbonate L Cellulose M Mineral
45、 ME MetalbR AramidcS Synthetic organicdS Scales, flakesT Talc W Wood X Not specified X Not specifiedZ Others Z OthersaaThe materials may be further defined, for example by their chemical symbols or by additional symbols defined in the relevant International Standard.bIn the case of metals (ME), the
46、type(s) of metal shall be indicated by means of the relevant chemical symbol(s).cAramid was previously defined by the symbol “R”, but “A” is in common use.dA specific material may be further defined.Mixtures of materials or forms may be indicated by combining the relevant codes using the sign “+“ an
47、d placing the whole between parentheses. For example, a mixture of 25 % glass fibres (GF) and 8 % mineral powder (MD) would be indicated by (GF25+MD08).4.4 Data block 3In this data block, information about the intended application and/or method of processing is given in position 1 and information ab
48、out important properties, additives, and colour in positions 2 to 8. The code-letters used are specified in Table 2.If information is presented in positions 2 to 8 and no specific information is given in position 1, the letter X shall be inserted in position 1.Table 2 Code-letters used in data block
49、 3Code-letter Position 1 Code-letter Positions 2 to 8A Processing stabilizedB Blow moulding aIn this document “improved” wear and/or frictional properties, means reduced wear and lowered coefficient of friction in applications requiring the acetal plastic to slide against a similar or different material, such as a plastic bearing sliding against a rotating steel shaft. ISO 2018 All rights reserved 3BS EN ISO 299881:2018ISO 29988-1:2018Code-letter Position 1 Code-letter Positions 2 t
