1、BRITISH STANDARD BS EN ISO 7823-2:2003 Incorporating Corrigendum No. 1 Plastics Poly(methyl methacrylate) sheets Types, dimensions and characteristics Part 2: Extruded sheets The European Standard EN ISO 7823-2:2003 has the status of a British Standard ICS 83.140.10 BS EN ISO 7823-2:2003 This Britis
2、h Standard was published under the authority of the Standards Policy and Strategy Committee on 19 June 2003 BSI 23 October 2003 ISBN 0 580 42072 8 National foreword This British Standard is the official English language version of EN ISO 7823-2:2003. It is identical with ISO 7823-2:2003. It supersed
3、es BS EN ISO 7823-2:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/75, Plastics films and sheets, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-refer
4、ences The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British
5、 Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present t
6、o the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an insid
7、e front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 11, two Annex ZA pages and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Com
8、ments 14786 Corrigendum No. 1 23 October 2003 Incorporating corrected EN ISO foreword page and adding Annex ZA pagesEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO78232 June2003 ICS83.140.10 SupersedesENISO78232:1996 Englishversion PlasticsPoly(methylmethacrylate)sheetsTypes,dimensions andchara
9、cteristicsPart2:Extrudedsheets(ISO78232:2003) PlastiquesPlaquesenpoly(mthacrylatedemthyle) Types,dimensionsetcaractristiquesPartie2:Plaques extrudes(ISO78232:2003) KunststoffeTafelnausPolymethylmethacrylatTypen, MaeundEigenschaftenTeil2:ExtrudierteTafeln(ISO 78232:2003) ThisEuropeanStandardwasapprov
10、edbyCENon5May2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManage
11、mentCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstand
12、ardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG
13、 ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO78232:2003EINESO8732:22(300E) 2 CORRECTED20030924 Foreword Thisdocument(ENISO78232:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC61 “Plastics“inco
14、llaborationwithTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatof whichisheldbyIBN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyDecember2003,andconflictingnational standardsshallbewithdrawnatthelatestbyDecember200
15、3. ThisdocumentsupersedesENISO78232:1996. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta
16、,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO78232:2003hasbeenapprovedbyCENasENISO78232:2003wit houtany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO78232:2003 Reference number I
17、SO 7823-2:2003(E)INTERNATIONAL STANDARD ISO 7823-2 Third edition 2003-06-01 Plastics Poly(methyl methacrylate) sheets Types, dimensions and characteristics Part 2: Extruded sheets Plastiques Plaques en poly(mthacrylate de mthyle) Types, dimensions et caractristiques Partie 2: Plaques extrudes ENISO7
18、8232:2003ii ENISO78232:2003 iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 2 4 General requirements . 3 5 Test methods. 6 6 Retest and rejection 8 Annex A (normative) Determination of light transmittance at 420 nm 9 Annex B (normative) Determination of dim
19、ensional change on heating (shrinkage). 10 ENISO78232:2003iv 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 commi
20、ttees. 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 I
21、nternational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Internationa
22、l Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the
23、 subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7823-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. This third edition cancels and replaces the second edition (ISO 7823-2:1996), which has been t
24、echnically revised. ISO 7823 consists of the following parts, under the general title Plastics Poly(methyl methacrylate) sheets Types, dimensions and characteristics: Part 1: Cast sheets Part 2: Extruded sheets Part 3: Continuous cast sheets ENISO78232:2003 1Plastics Poly(methyl methacrylate) sheets
25、 Types, dimensions and characteristics Part 2: Extruded sheets 1 Scope This part of ISO 7823 specifies requirements for flat poly(methyl methacrylate) (PMMA) sheets extruded from colourless or coloured, transparent, translucent or opaque materials as defined in 3.1. The thickness range of the sheets
26、 covered by this part of ISO 7823 is 1,5 mm to 20 mm. 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 (includi
27、ng any amendments) applies. ISO 62:1999, Plastics Determination of water absorption ISO 75-1: 1) , Plastics Determination of temperature of deflection under load Part 1: General test method ISO 75-2: 2) , Plastics Determination of temperature of deflection under load Part 2: Plastics, ebonite and lo
28、ng-fibre-reinforced composites ISO 178:2001, Plastics Determination of flexural properties ISO 179-1:2000, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test ISO 291:1997, Plastics Standard atmospheres for conditioning and testing ISO 306: 3) , Plastics Thermopla
29、stic materials Determination of Vicat softening temperature (VST) ISO 489:1999, Plastics Determination of refractive index ISO 527-1:1993, Plastics Determination of tensile properties Part 1: General principles 1) To be published. (Revision of ISO 75-1:1993) 2) To be published. (Revision of ISO 75-2
30、:1993) 3) To be published. (Revision of ISO 306:1994) ENISO78232:20032 ISO 527-2:1993, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 877:1994, Plastics Methods of exposure to direct weathering, to weathering using glass-filtered daylight
31、, and to intensified weathering by daylight using Fresnel mirrors ISO 1133: 4) , Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics ISO 1183-1: 5) , Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion meth
32、od, liquid pyknometer method and titration method ISO 1183-2: 5) , Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column method ISO 1628-6:1990, Plastics Determination of viscosity number and limiting viscosity number Part 6: Methyl methacrylate polyme
33、rs ISO 2039-2:1987, Plastics Determination of hardness Part 2: Rockwell hardness ISO 2818:1994, Plastics Preparation of test specimens by machining ISO 2859-1:1999, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot insp
34、ection ISO 4582:1998, Plastics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources ISO 4892-2:1994, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc sources ISO 4892-4:1994, P
35、lastics Methods of exposure to laboratory light sources Part 4: Open-flame carbon- arc lamps ISO 8257-1:1998, Plastics Poly(methyl methacrylate) (PMMA) moulding and extrusion materials Part 1: Designation system and basis for specifications ISO 11359-2:1999, Plastics Thermomechanical analysis (TMA)
36、Part 2: Determination of coefficient of linear thermal expansion and glass transition temperature ISO 13468-1:1996, Plastics Determination of the total luminous transmittance of transparent materials Part 1: Single-beam instrument ISO 14782:1999, Plastics Determination of haze for transparent materi
37、als 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3. 1 homopolymers and copolymers of methyl methacrylate (MMA) PMMA homopolymers and copolymers of MMA containing at least a mass fraction of 80 % of MMA and not more than a mass fraction of 20 %
38、 of acrylic ester or other suitable monomers 4) To be published. (Revision of ISO 1133:1997) 5) To be published. (Revision in parts of ISO 1183:1987) ENISO78232:2003 3NOTE 1 They may include both unmodified materials and materials containing lubricants, processing aids, UV absorbers, pigments and co
39、lorants. They do not include PMMA modified with elastomers (see ISO 8257-1). NOTE 2 The use of additives will be governed by national environmental legislation and regulations. 3.2 flat PMMA sheets sheets with two plane, substantially parallel surfaces 4 General requirements 4. 1 Protective covering
40、s Unless otherwise agreed upon by the interested parties, the surfaces of the sheet, as delivered, shall be protected by suitable materials, for example kraft paper secured with a water-soluble or pressure-sensitive adhesive, or a polyethylene film, which are readily removable without causing surfac
41、e contamination or damage. 4.2 Appearance 4.2. 1 Surface defects The sheet shall have a smooth surface. There shall be no scratches, marks or other surface defects larger than 4 mm 2each anywhere in the sheet. 4.2.2 Inclusion defects There shall be no bubbles, foreign-matter inclusions, cracks or ot
42、her defects that could adversely affect the performance of the sheet in its intended application. In the case of inclusions, there shall also be none which are larger than 2 mm 2each anywhere in the sheet. 4.2.3 Classification of defects The area of any defect found in the sheets shall be classified
43、 as specified in Table 1. Each defect shall be considered separately. Table 1 Classification of defects Classification Area of surface defect Area of inclusion defect Negligible Less than 2 mm 2Less than 1 mm 2Acceptable 2 mm 2to 4 mm 21 mm 2to 2 mm 24.2.4 Distribution of defects 4.2.4. 1 There shal
44、l not be a significant number (for the application) of small defects, each of which is defined as negligible in Table 1, within 1 m 2anywhere in the sheet. What constitutes a significant number shall be agreed between the interested parties. 4.2.4.2 No defect defined as acceptable in Table 1 shall b
45、e within 500 mm of another acceptable defect anywhere in or on the sheet. 4.3 Colour The colour distribution shall be homogeneous, unless otherwise specified. Variations in colour shall be agreed upon between the interested parties. ENISO78232:20034 4.4 Dimensions 4.4. 1 Length and width The length
46、and width of the sheet shall be agreed upon between the interested parties. For cut sheets, the tolerances for each sheet shall be as specified in Table 2. Table 2 Tolerances on length and width of cut sheets Length or width mm Tolerance mm Up to 1 000 3 0 +From 1 001 to 2 000 6 0 +From 2 001 to 3 0
47、00 9 0 +3 001 and over 0,3 % 0 +4.4.2 Thickness The thickness tolerance for sheets in the range from 1,5 mm to less than 3 mm shall be 10 %; for sheets from 3 mm to 20 mm thick, it shall be 5 %. The tolerances apply within each sheet and from sheet to sheet. 4.4.3 Deviation of shape from rectangular The difference l between the lengths of the two diagonals of the rectangular sheet, expressed in millimetres, shall be less than 3,5 10 3 b (where b is the width, in millimetres, of the sheet, measured perpendicular to the direction of extrusion) do
