1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 877-3:2010Plastics Methods ofexposure to solar radiationPart 3: Intensified weathering usingconcentrated solar radiation (ISO877-3:2009)Licensed Copy: Wang Bin, ISO/EXC
2、HANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 877-3:2010.It is identical to ISO 877-3:2009. Together with BS EN ISO 877-1:2010and BS EN ISO 877-2:2010, it supersedes BS
3、 EN ISO 877:1997 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/21, Testing of plastics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessarypr
4、ovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 57613 3ICS 83.080.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee o
5、n 31 January 2011.Amendments issued since publicationDate Text affectedLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 877-3 December 2010 ICS 83.080.01 Supersedes EN ISO 877:1996English Versi
6、on Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using concentrated solar radiation (ISO 877-3:2009) Plastiques - Mthodes dexposition au rayonnement solaire - Partie 3: Exposition intensifie par rayonnement solaire concentr (ISO 877-3:2009) Kunststoffe - Freibewi
7、tterung - Teil 3: Beschleunigte Bewitterung mit gebndelter Sonnenstrahlung (ISO 877-3:2009) This European Standard was approved by CEN on 4 December 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the st
8、atus 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French,
9、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. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cro
10、atia, 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 STANDARD
11、IZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 877-3:2010: ELicensed Copy: Wang Bin, ISO/EXCHANGE
12、CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010EN ISO 877-3:2010 (E) 3 Foreword The text of ISO 877-3:2009 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 877
13、-3:2010 by Technical Committee CEN/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 June 2011, and conflicting national standards shall be
14、 withdrawn at the latest by June 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 877:1996. Accor
15、ding to the CEN/CENELEC Internal Regulations, 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, France, Germany, Greece, Hungary, Iceland, Ireland, Ita
16、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 877-3:2009 has been approved by CEN as a EN ISO 877-3:2010 without any modification. Licensed Copy: Wang
17、 Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010ISO 877-3:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Principle. 1 4 Apparatus 2 5 Test specimens . 3 6 Exposure condition
18、s 4 7 Exposure stages . 6 8 Procedure 7 9 Expression of results . 8 10 Test report . 9 Bibliography . 10 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010ISO 877-3:2009(E) iv ISO 2009 All rights reservedForeword ISO (the Internati
19、onal 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 technical committee has been
20、 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standa
21、rdization. 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 Standards adopted by the technical committees are circulated to the member bodies for
22、voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. ISO 877-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Ageing, chemical and environmental resistance. Together with the other parts (see below), it
23、cancels and replaces ISO 877:1994, which has been technically revised. ISO 877 consists of the following parts, under the general title Plastics Methods of exposure to solar radiation: Part 1: General guidance Part 2: Direct weathering and exposure behind window glass Part 3: Intensified weathering
24、using concentrated solar radiation Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010ISO 877-3:2009(E) ISO 2009 All rights reserved vIntroduction The International Organization for Standardization (ISO) draws attention to the fact
25、that it is claimed that compliance with this document may involve the use of American patents US 6659638 B1, US 7318672 B2 and US 4807247 concerning the temperature control discussed in Subclause 6.3. ISO takes no position concerning the evidence, validity and scope of these patent rights. The holde
26、r of these patent rights has assured ISO that he is willing to negotiate licences under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of these patent rights is registered with ISO. Information may be obtained
27、 from: Atlas Material Testing Technology LLC Intellectual Property 45601 North 47th Avenue Phoenix, Arizona 85087, USA Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights other than those identified above. ISO shall not be held respons
28、ible for identifying any or all such patent rights. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010INTERNATIO
29、NAL STANDARD ISO 877-3:2009(E) ISO 2009 All rights reserved 1Plastics Methods of exposure to solar radiation Part 3: Intensified weathering using concentrated solar radiation 1 Scope This part of ISO 877 specifies a method for exposing plastics to concentrated solar radiation using reflecting concen
30、trators to accelerate the weathering processes. The purpose is to assess property changes produced after specified stages of such exposures. General guidance concerning the scope of ISO 877 is given in ISO 877-1:2009, Clause 1. The reflecting concentrators used in these exposures are sometimes refer
31、red to as “Fresnel reflectors” because in cross-section the array of mirrors used to concentrate the solar radiation resembles the cross-section of a Fresnel lens. For additional information about solar concentrating exposures, including a partial list of standards in which they are specified, refer
32、 to the Bibliography. 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
33、877-1:2009, Plastics Methods of exposure to solar radiation Part 1: General guidance ISO 4582, Plastics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources ISO 4892-1, Plastics Methods of exposure to l
34、aboratory light sources Part 1: General guidance ASTM G 90, Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight ASTM G 179, Standard Specification for Metal Black Panel and White Panel Temperature Devices for Natural Weathering
35、 Tests 3 Principle This part of ISO 877 describes a method for performing accelerated weathering on plastics using intensified solar radiation. General guidance is given in ISO 877-1:2009, Clause 4. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS
36、 EN ISO 877-3:2010ISO 877-3:2009(E) 2 ISO 2009 All rights reserved4 Apparatus 4.1 General requirements Refer to ISO 877-1:2009, Subclause 5.1, for general requirements. All requirements for the solar concentrating device, operation of the device and measurement of the solar radiation within the spec
37、imen exposure area shall be in accordance with ASTM G 90. See Figures 1 and 2 for schematic diagrams of the two types of test apparatus. Key 1 air plenum 6 mirror 11 clutch disc for elevation drive 2 air blower 7 gear box 12 solar cells with shadow hat 3 rotor assembly 8 mast for manual elevation ad
38、justment 13 specimen protection door 4 air deflector 9 air flow switch 14 door release mechanism 5 A-frame assembly 10 water spray nozzles Figure 1 Schematic diagram of test apparatus with single-axis tracking and manual elevation adjustment Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/
39、04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010ISO 877-3:2009(E) ISO 2009 All rights reserved 3Key 1 air plenum 7 gear box for elevation drive 12 clutch disc for elevation drive 2 air blower 8 control box 13 solar cells with shadow hat 3 rotor assembly 9 gear box for azimuth drive 14 s
40、pecimen protection door 4 turntable assembly 10 air flow switch 15 door release mechanism 5 A-frame assembly 11 water spray nozzles 16 air deflector 6 mirror Figure 2 Schematic diagram of test apparatus with dual-axis tracking 4.2 Apparatus for measurement of climatic factors Refer to ISO 877-1:2009
41、, Subclause 5.2. 5 Test specimens Refer to ISO 877-1:2009, Clause 6. NOTE When irregularly shaped specimens are used, air flow and specimen cooling may be adversely affected. In addition, irradiance will not be uniform on all surfaces of a shaped specimen. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA
42、 STANDARDS, 15/04/2011 03:11, Uncontrolled Copy, (c) BSIBS EN ISO 877-3:2010ISO 877-3:2009(E) 4 ISO 2009 All rights reserved6 Exposure conditions 6.1 Orientation of mirrors For specific information on the orientation of the mirrors, refer to ASTM G 90. 6.2 Exposure site Fresnel-reflecting solar conc
43、entrating devices operate most effectively at locations that receive at least 3 500 h of sunshine per year and where the average daytime relative humidity is less than 30 %. ASTM G 90 provides requirements for the exposure sites average ratio of direct solar radiation to global normal solar radiatio
44、n. NOTE In regions that receive 3 500 h of solar radiation and where the average daytime relative humidity is less than 30 %, the average ratio of direct solar radiation to global normal solar radiation is at least 0,75. Areas that meet these criteria have a minimum diffuse component of solar radiat
45、ion (sky radiation). The use of reflecting solar concentrator devices in regions of moderate to high diffuse solar irradiance will substantially reduce the amount of UV radiation at the specimen target board. Moderate to high levels of humidity and urban aerosols result in scattering of the direct c
46、omponent of solar radiation so that ultraviolet radiation is scattered into the hemispherical sky dome and is not available to be focused by the mirrors on to the specimen target board. This is shown in Figure 3. In addition, the use of reflecting solar concentrator devices in regions of moderate to
47、 high diffuse solar irradiance may give different stability rankings for materials compared to exposures conducted in accordance with ISO 877-2 because of the differences in UV radiation. 6.3 Temperature control Solar concentrating devices are equipped with a blower to cool the specimens. Specimen t
48、emperatures for most materials are typically 10 C higher than the maximum temperature which would be reached if an identical specimen was exposed directly to solar radiation (without concentration) at normal incidence at the same time. If more precise control of specimen temperature is required, the
49、 temperature of a black or white panel, the temperature of a black or white standard thermometer, the temperature of a particular specimen, the air temperature or the temperature indicated by a remote sensor may be monitored and used as an input to control the specimen temperature. If used, report the controlled temperature and any observed deviations in the test report. NOTE 1 Use of this method of temperature control may produce results that are not equivalent to typical solar concentrating exposures and may require lo
