1、BS EN ISO8257-1:2006ICS 83.080.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPlastics Poly(methylmethacrylate)(PMMA) moulding andextrusion materialsPart 1: Designation system and basisfor specificationsThis British Standard was published under the authority
2、of the Standards Policy and Strategy Committee on 30 September 2009. BSI 2009ISBN 978 0 580 67582 9Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 8257-1:2006National forewordThis British Standard is the UK implementation of EN ISO 8257-1:2006. It is identical to ISO 8257-1:1998
3、. It supersedes BS ISO 8257-1:1987 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic materials.A list of organizations represented on this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 in
4、clude all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8257-1April 2006ICS 83.080.20English VersionPlastics - Poly(methy
5、l methacrylate) (PMMA) moulding andextrusion materials - Part 1: Designation system and basis forspecifications (ISO 8257-1:1998)Plastiques - Poly(mthacrylate de mthyle) (PMMA) pourmoulage et extrusion - Partie 1: Systme de dsignation etbase de spcification (ISO 8257-1:1998)Kunstsoffe - Polymethylme
6、thacrylat (PMMA)-Formmassen -Teil 1: Bezeichnungssystem und Basis fr Spezifikationen(ISO 8257-1:1998)This European Standard was approved by CEN on 16 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard t
7、he status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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)
8、. A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark,
9、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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROP
10、ISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8257-1:2006: EEN ISO 8257-1:2006 (E) 2 Foreword The text of ISO 8257-1:1998 has been prepared by
11、 Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 8257-1:2006 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 st
12、andard, 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 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
13、 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, Swi
14、tzerland and United Kingdom. Endorsement notice The text of ISO 8257-1:1998 has been approved by CEN as EN ISO 8257-1:2006 without any modifications. BS EN ISO 8257-1:2006INTERNATIONAL STANDARD ISO ISO 8257-1:1998(E)1Plastics Poly(methyl methacrylate) (PMMA) moulding andextrusion materials Part 1:De
15、signation system and basis for specifications1 Scope1.1 This part of ISO 8257 establishes a system of designation for poly(methyl methacrylate) (PMMA) thermoplasticmaterials, which may be used as the basis for specifications.1.2 The types of PMMA plastics are differentiated from each other by the cl
16、assification system based onappropriate levels of the designatory propertiesa) Vicat softening temperature,b) melt mass-flow rate,c) viscosity number (optional),and on information about intended application and/or method of processing, important properties, additives andcolorants.1.3 This part of IS
17、O 8257 is applicable to all poly(methyl methacrylate) homopolymers and to copolymers of methylmethacrylate (MMA) containing at least 80 % (m/m) of MMA and not more than 20 % (m/m) of acrylic esters or othermonomers.It applies to materials ready for normal use in the form of beads, granules and pelle
18、ts and to materials unmodified ormodified by colorants, additives, etc.This part of ISO 8257 does not apply to PMMA modified with elastomers.1.4 It is not intended to imply that materials having the same designation give necessarily the same performance.This part of ISO 8257 does not provide enginee
19、ring data, performance data or data on processing conditions whichmay be required to specify a material for a particular application and/or method of processing.If such additional properties are required, they shall be determined in accordance with the methods specified inpart 2 of this Internationa
20、l Standard, if suitable.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 clause 3, introductory paragraph).BS EN ISO 8257-1:2006ISO 8257-1:1998(E)ISO22 Normative referencesThe
21、following standards contain provisions which, through reference in this text, constitute provisions of this part ofISO 8257. At the time of publication, the editions indicated were valid. All standards are subject to revision, andparties to agreements based on this part of ISO 8257 are encouraged to
22、 investigate the possibility of applying themost recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently validInternational Standards.ISO 472:1), Plastics Vocabulary.ISO 1043-1:1997, Plastics Symbols and abbreviated terms Part 1: Basic polymers and th
23、eir specialcharacteristics.ISO 8257-2:1990, Plastics Poly(methyl methacrylate) (PMMA) moulding and extrusion materials Part 2:preparation of test specimens and determination of properties.3 Designation and specification systemThe designation and specification system for thermoplastics is based on th
24、e following standardized pattern:DesignationIdentity blockDescription blockInternationalIndividual-item block(optional)Standardnumber blockDatablock 1Datablock 2Datablock 3Datablock 4Datablock 5The designation consists of an optional description block, reading “Thermoplastics”, and an identity block
25、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 followinginformation: Data block 1: Identification of the plastic by its symbol PMMA in accordance with ISO 1043-1 (see
26、3.1). Data block 2: Position 1: Intended application or method of processing (see 3.2).Positions 2 to 8: Important properties, additives and supplementary information (see 3.2). Data block 3: Designatory properties (see 3.3). Data block 4: Fillers or reinforcing materials and their nominal content (
27、not included in this part ofISO 8257) (see 3.4). Data block 5: For the purpose of specifications, a fifth data block may be added containing additional information.This first character of the individual-item block shall be a hyphen. The data blocks shall be separated from eachother by commas.If a da
28、ta block is not used, this shall be indicated by doubling the separation sign, i.e. by two commas (,)._1) To be published. (Revision of ISO 472:1988)BS EN ISO 8257-1:2006ISOISO 8257-1:1998(E)33.1 Data block 1In this data block, after the hyphen, poly(methyl methacrylate) plastics are identified by t
29、he symbol “PMMA”, inaccordance with ISO 1043-1.3.2 Data block 2In this data block, information about the intended application and/or method of processing is given in position 1 andinformation about important properties, additives and colorants in positions 2 to 8. The code-letters used arespecified
30、in table 1.If information is presented in positions 2 to 8 and no specific information is given in position 1, the letter X shall beinserted in position 1.3.3 Data block 3In this data block, the range of the Vicat softening temperature is represented by a three-figure code number (see3.3.1), the mel
31、t mass-flow rate by a three-figure code-number (see 3.3.2) and, optionally, the viscosity number by atwo-figure code-number (see 3.3.3). The two (or three) code-numbers, are separated from each other by a hyphen.If a property value falls on or near a range limit, the manufacturer shall state which r
32、ange will designate the material.If subsequent individual test values lie on, or either side of, the range limit because of manufacturing tolerances, thedesignation is not affected.NOTE Not all the combinations of values of the designatory properties are available with currently offered polymers.3.3
33、.1 Vicat softening temperatureThe Vicat softening temperature shall be determined in accordance with ISO 8257-2.The possible values of the Vicat softening temperature (VST) are divided into eight ranges, each represented by athree-figure code number, as specified in table 2.3.3.2 Melt flow rateThe m
34、elt mass-flow rate (MFR) shall be determined in accordance with ISO 8257-2.The possible values of the MFR are divided into six ranges, each represented by a three-figure code number, asspecified in table 3.3.3.3 Viscosity number (optional)If required, the viscosity number (VN) shall be determined in
35、 accordance with ISO 8257-2.The possible values of the viscosity number are divided into six ranges, each represented by a two-figure codenumber, as specified in table 4.3.4 Data block 4This data block, employed to represent filler and/or reinforcing materials, is not used in this part of ISO 8257.3
36、.5 Data block 5Indication of additional requirements in this optional data block is a way of transforming the designation of a materialinto a specification for a particular application. This may be done for example by reference to a suitable nationalstandard or to a generally established specificati
37、on.BS EN ISO 8257-1:2006ISO 8257-1:1998(E)ISO4Table 1 Code-letters used in data block 2Code-letter Position 1 Code-letter Positions 2 to 8A Processing stabilizedC Coloured 2)D Disc manufacture 1)D Beads 3)E Extrusion of tubes, profiles and sheet E ExpandableF Extrusion of film and thin sheeting F Sp
38、ecial burning characteristicsG General use G Pellets, granules 3)H Coating H Heat-ageing stabilizedL Monofilament extrusion L Light and/or weather stabilizedM Injection mouldingN Natural (not coloured)Q Compression mouldingR Rotational moulding R Moulding release agentS Powder coating or sintering S
39、 LubricatedT Controlled transparencyX No indicationZ Antistatic1) In this part of ISO 8257, video disc manufacture.2) C1 = coloured but transparent2) C2 = coloured and non-transparent3) For the correct definition of beads, pellets and granules, see ISO 472.Table 2 Code-numbers used for Vicat softeni
40、ng temperature in data block 3Code-numberRange of VSTC076 80 but 88 but 96 but 104 but 112 but 120 but 128BS EN ISO 8257-1:2006ISOISO 8257-1:1998(E)5Table 3 Code-numbers used for melt flow rate in data block 3Code-numberRange of MFRg/10 min005 1 but 2 but 4 but 8 but 16Table 4 Code-numbers used for
41、viscosity number in data block 3Code-numberRange of VNml/g(optional)43 48 but 58 but 68 but 78 but 884 Example of a designationA PMMA intended for injection-moulding material (M), light stabilized (L), natural (not coloured) (N), with a Vicatsoftening temperature of 101 C (100), a melt flow rate of
42、10 g/10 min (120) and a viscosity number of 50 ml/g (53),would be designated:Designation: (Thermoplastics) ISO 8257-PMMA,MLN,100-120-53BS EN ISO 8257-1:2006ISO 8257-1:1998(E)ISOICS 83.080.20Descriptors: plastics, thermoplastic resins, moulding materials, extrusion materials, polymethylmethacrylates,
43、 designation, alphanumericcodes, specifications, data blocks.Price based on 5 pagesBS EN ISO 8257-1:2006This page has been intentionally left blankBS EN ISO 8257-1:2006BS EN ISO8257-1:2006BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - Briti
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