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1 SVENSK STANDARD SS-EN ISO :2006 Fastställd Utgåva 1 Plast Sprutmassor av polyoxymetylen (POM) Del 1: Beteckningssystem och specifikationsgrund (ISO :2004) Plastics Polyoxymethylene (POM) moulding and extrusion materials Part 1: Designation system and basis for specifications (ISO :2004) ICS Språk: engelska Publicerad: maj 2006 Copyright SIS. Reproduction in any form without permission is prohibited.
2 Europastandarden EN ISO :2006 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO :2006. The European Standard EN ISO :2006 has the status of a Swedish Standard. This document contains the official English version of EN ISO :2006. Upplysningar om sakinnehållet i standarden lämnas av SIS, Swedish Standards Institute, telefon Standarder kan beställas hos SIS Förlag AB som även lämnar allmänna upplysningar om svensk och utländsk standard. Postadress: SIS Förlag AB, STOCKHOLM Telefon: Telefax: E-post: Internet:
3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO April 2006 ICS English Version Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO :2004) Plastiques - Matériaux à base de polyoxyméthylène (POM) pour moulage et extrusion - Partie 1: Système de désignation et base de spécification (ISO :2004) Kunststoffe - Polyoxymethylen (POM)-Formmassen - Teil 1: Bezeichnungssystem und Basis für Spezifikationen (ISO :2004) This European Standard was approved by CEN on 16 March 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 Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO :2006: E
4 EN ISO :2006 (E) Provläsningsexemplar / Preview Foreword The text of ISO :2004 has been prepared by Technical Committee ISO/TC 61 "Plastics of the International Organization for Standardization (ISO) and has been taken over as EN ISO :2006 by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held by IBN. 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 October 2006, and conflicting national standards shall be withdrawn at the latest by October According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO :2004 has been approved by CEN as EN ISO :2006 without any modifications. ii
5 EN ISO :2006 (E) Plastics Polyoxymethylene (POM) moulding and extrusion materials Part 1: Designation system and basis for specifications 1 Scope 1.1 This part of ISO 9988 establishes a system of designation for polyoxymethylene (POM) thermoplastic materials, which may be used as the basis for specifications. 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 2 O as an integral part of the main polymer chain resulting from polymerization of formaldehyde. 1.2 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. 1.3 This part of ISO 9988 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. 1.4 It is not intended to imply that materials having the same designation necessarily give the same performance. This part of ISO 9988 does not provide engineering data, performance data or data on processing conditions which may be required to specify materials for particular end-use applications. If such additional properties are required, they shall be determined in accordance with the test methods specified in part 2 of this International Standard. 1.5 In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see 3.1). 1
6 EN ISO :2006 (E) Provläsningsexemplar / Preview 2 Normative references The following referenced documents are indispensable for the application 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 , Plastics Symbols and abbreviated terms Part 1: Basic polymers and their special characteristics ISO , Plastics Polyoxymethylene (POM) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties 3 Designation and specification system 3.1 General The designation and specification system for thermoplastics is based on the following standardized pattern: Description block (optional) International Standard number block Designation Identity block Individual-item block Data block Data block Data block Data block Data 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 POM in accordance with ISO and information about the polymerization process or composition of the polymer (see 3.2). Data block 2: Position 1: Intended application or method of processing (see 3.3). Positions 2 to 8: Important properties, additives and supplementary information (see 3.3). Data block 3: Designatory properties (see 3.4). Data block 4: Fillers or reinforcing materials and their nominal content (see 3.5). Data block 5: For the purpose of specifications, a fifth data block may be added containing additional information (see 3.6). The first character of the individual-item block shall be a hyphen. The data blocks shall be separated from each other by commas. If a data block is not used, this shall be indicated by doubling the separation sign, i.e. by two commas (,,). 3.2 Data block 1 In this data block, after the hyphen, polyoxymethylene plastics are identified by the symbol POM in accordance with ISO , followed by a hyphen and the code-letter H for homopolymers or K for copolymers. 2