1、BRITISH STANDARDBS EN ISO 7823-3:2007Plastics Poly(methyl methacrylate) sheets Types, dimensions and characteristics Part 3: Continuous cast sheetsThe European Standard EN ISO 7823-3:2007 has the status of a British StandardICS 83.140.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44
2、g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 7823-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007ISBN 978 0 580
3、56409 3National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 7823-3:2007. It supersedes BS EN ISO 7823-3:2004 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/76, Laminated sheet for decorative purposes.A
4、 list of organizations represented on this committee can be obtained on request to its secretary.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 cannot confer immunity from l
5、egal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 7823-3May 2007ICS 83.140.10 Supersedes EN ISO 7823-3:2004 English VersionPlastics - Poly(methyl methacrylate) sheets - Types, dimensionsand characteristics - Part 3: Contin
6、uous cast sheets (ISO 7823-3:2007)Plastiques - Plaques en poly(mthacrylate de mthyle) -Types, dimensions et caractristiques - Partie 3: Plaquescoules continues (ISO 7823-3:2007)Kunststoffe - Tafeln aus Polymethylmethacrylat - Typen,Mae und Eigenschaften - Teil 3: Endlosprodukte (ISO7823-3:2007)This
7、European Standard was approved by CEN on 23 April 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references c
8、oncerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its o
9、wn language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
10、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All
11、 rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 7823-3:2007: EForeword This document (EN ISO 7823-3:2007) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics“, the
12、 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 November 2007, and conflicting national standards shall be withdrawn at the latest by November 2007. This docu
13、ment supersedes EN ISO 7823-3:2004. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece
14、, 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 7823-3:2007 has been approved by CEN as EN ISO 7823-3:2007 without any modif
15、ications. EN ISO 7823-3:2007Reference numberISO 7823-3:2007(E)INTERNATIONAL STANDARD ISO7823-3Second edition2007-05-15Plastics Poly(methyl methacrylate) sheets Types, dimensions and characteristics Part 3: Continuous cast sheets Plastiques Plaques en poly(mthacrylate de mthyle) Types, dimensions et
16、caractristiques Partie 3: Plaques coules continues EN ISO 7823-3:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Composition 2 5 General requirements. 2 6 Test methods. 6 7 Retest and rejection 7 Annex A (normative) Determination of dimensional
17、 change on heating (shrinkage). 8 EN ISO 7823-3:2007iv 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 committees.
18、 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 Interna
19、tional 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 International Stan
20、dards 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 subje
21、ct of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7823-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. This second edition cancels and replaces the first edition (ISO 7823-3:2003), which has been technic
22、ally 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 EN ISO 7823-3:20071Plastics Poly(methyl methacrylate) sheets Typ
23、es, dimensions and characteristics Part 3: Continuous cast sheets 1 Scope This part of ISO 7823 specifies requirements for non-modified flat poly(methyl methacrylate) (PMMA) continuous cast sheets for general-purpose use. The sheets may be colourless or coloured, and may be transparent, translucent
24、or opaque. The thickness range of the sheets covered by this part of ISO 7823 is 1 mm to 10 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 e
25、dition of the referenced document (including any amendments) applies. ISO 62:1999, Plastics Determination of water absorption ISO 75-2:2004, Plastics Determination of temperature of deflection under load Part 2: Plastics and ebonite ISO 178, Plastics Determination of flexural properties ISO 179-1, P
26、lastics Determination of Charpy impact properties Part 1: Non-instrumented impact test ISO 291, Plastics Standard atmospheres for conditioning and testing ISO 306:2004, Plastics Thermoplastics materials Determination of Vicat softening temperature (VST) ISO 489:1999, Plastics Determination of refrac
27、tive index ISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 877, Plastics Methods of exposure to direct weathering, to weathering using glass-filtered daylight, and to intensified weathering by daylight using Fresnel mirrors ISO
28、1183-1:2004, Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, liquid pyknometer method and titration method ISO 1183-2, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column method ISO 2039-2, Plastics Det
29、ermination of hardness Part 2: Rockwell hardness EN ISO 7823-3:20072 ISO 2818, Plastics Preparation of test specimens by machining ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 4582, Plast
30、ics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources ISO 4892-2:2006, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps ISO 4892-4, Plastics Methods of exposure to lab
31、oratory light sources Part 4: Open-flame carbon-arc lamps ISO 11359-2, Plastics Thermomechanical analysis (TMA) Part 2: Determination of coefficient of linear thermal expansion and glass transition temperature ISO 13468-1, Plastics Determination of the total luminous transmittance of transparent mat
32、erials Part 1: Single-beam instrument ISO 13468-2, Plastics Determination of the total luminous transmittance of transparent materials Part 2: Double-beam instrument ISO 14782, Plastics Determination of haze for transparent materials 3 Terms and definitions For the purposes of this document, the fol
33、lowing terms and definitions apply. 3.1 non-modified cast PMMA sheets sheets based on homopolymers of MMA, or copolymers of MMA with acrylic or methacrylic monomers, produced by bulk polymerization in the presence of suitable initiators 3.2 flat PMMA sheets sheets with two plane, substantially paral
34、lel surfaces 4 Composition The amounts of plasticizing ingredients (materials that do not undergo chemical reaction to become a part of the polymer), other monomers and crosslinking agents (materials that produce the links between the chains of polymers) present shall be such that the basic properti
35、es are not changed from the values given in Table 3. These amounts are in most cases less than a mass fraction of 5 %. Other additives, e.g. colorants, UV absorbers and pigments, may be included to give specific properties. National environmental legislation and regulations shall be followed regardi
36、ng additives. 5 General requirements 5.1 Protective coverings 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 polyethyl
37、ene film, which are readily removable without causing surface contamination or damage. EN ISO 7823-3:200735.2 Appearance 5.2.1 Surface defects The sheet shall have a smooth surface. There shall be no scratches, marks or other surface defects larger than 3 mm2each anywhere in the sheet. 5.2.2 Inclusi
38、on defects There shall be no bubbles, inclusions, cracks or other defects that could adversely affect the performance of the sheet in its intended application which are larger than 3 mm2each anywhere in the sheet. 5.2.3 Classification of defects The area of any defect found in the sheets shall be cl
39、assified 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 1 mm2Less than 1 mm2Acceptable 1 mm2to 3 mm21 mm2to 3 mm25.2.4 Distribution of defects 5.2.4.1 There sha
40、ll not be a significant number (for the application) of small defects, each of which is defined as negligible in Table 1, within 1 m2anywhere in the sheet. What constitutes a significant number shall be agreed between the interested parties. 5.2.4.2 No defect defined as acceptable in Table 1 shall b
41、e within 500 mm of another acceptable defect anywhere in or on the sheet. 5.3 Colour The colour distribution shall be homogeneous, unless otherwise specified. Variations in colour shall be agreed upon between the interested parties. 5.4 Dimensions 5.4.1 Length and width The length and width of the s
42、heet shall be agreed upon between the interested parties. For cut sheets, the tolerances for each sheet shall be as specified in Table 2. EN ISO 7823-3:20074 Table 2 Tolerances on length and width of cut sheets Length or width mm Tolerance Up to 1 000 30mm+From 1 001 to 2 000 60mm+From 2 001 to 3 00
43、0 90mm+3 001 and over 0,30%+5.4.2 Thickness The thickness tolerance for sheets in the range from 1 mm to 10 mm and up to 6 m2in area shall be 0,1h, where h is the nominal sheet thickness in millimetres. The tolerances apply within each sheet and from sheet to sheet. 5.4.3 Tolerances for other sheet
44、sizes Tolerances for sheet sizes and thicknesses outside the above ranges shall be agreed upon between the interested parties. 5.4.4 Conditions of measurement Measurements of dimensions shall be made at room temperature, except that, in cases of dispute, measurements shall be made under standard con
45、ditions, as specified in ISO 291. For measurements made under ambient conditions, due allowance shall be made for dimensional changes due to the differences in temperature and relative humidity between test locations. 5.5 Basic and other properties 5.5.1 Basic properties The basic mechanical, therma
46、l and optical properties of sheets shall be as specified in Table 3. 5.5.2 Other properties Other properties of sheets shall be agreed upon between the interested parties. Examples of, and test methods for, such properties are presented in Table 4. EN ISO 7823-3:20075Table 3 Basic properties of PMMA
47、 continuous cast sheets Required values Property Unit Test method Required value Subclause Tensile strength MPa ISO 527-2/1B/5 min. 60 6.5.2 Tensile strain % ISO 527-2/1B/5 min. 2 6.5.2 Modulus of elasticity in tension MPa ISO 527-2/1B/1 min. 2 700 6.5.2 Charpy impact strength (unnotched) kJ/m2ISO 1
48、79-1/1fU min. 8 6.5.3 Vicat softening temperature C ISO 306:2004, method B50 min. 95 6.6.1 Dimensional change on heating (shrinkage) % Annex A max. 2,8 6.6.3 Total luminous transmittancea% ISO 13468-1 min. 90 6.8.1 Light transmittance at 420 nm (thickness 3 mm)a before exposure to xenon lamp after e
49、xposure to xenon lamp for 1 000 h (ISO 4892-2:2006, method A) % % ISO 13468-2 ISO 13468-2 min. 90 min. 88 6.8.3 6.8.3 aFor transparent, colourless material. Table 4 Other properties of PMMA continuous cast sheets Typical values Property Unit Test method Typical value Subclause Flexural strength MPa ISO 178 110 to 115 6.5.1 Rockwell hardness Scale M ISO 2039-2 95 to 100 6.5.4 Linear expansion coefficient C1ISO 11359-2 7 1056.6.4 Temperature of deflection
