1、BRITISH STANDARD BS EN 13523-24:2004 Coil coated metals Test methods Part 24: Resistance to blocking and pressure marking The European Standard EN 13523-24:2004 has the status of a British Standard ICS 25.220.60 BS EN 13523-24:2004 This British Standard was published under the authority of the Stand
2、ards Policy and Strategy Committee on 25 November 2004 BSI 25 November 2004 ISBN 0 580 44866 5 National foreword This British Standard is the official English language version of EN 13523-24:2004. The UK participation in its preparation was entrusted to Technical Committee STI/27, Paint systems for
3、metallic substrates, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI
4、Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for it
5、s correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interes
6、ts informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the
7、document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1352324 November2004 ICS25.220.60 Englishversion CoilcoatedmetalsTestmethodsPart24:Resistanceto blockingandpressuremarking TlesprlaquesMthodesdessaiPartie24: Rsistance
8、ladhrenceetaumarbrage BandbeschichteteMetallePrfverfahrenTeil24:Block undStapelfestigkeit ThisEuropeanStandardwasapprovedbyCENon23September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithou
9、tanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaC
10、ENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherland
11、s,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwidefor
12、CENnationalMembers. Ref.No.EN1352324:2004:EEN 13523-24:2004 (E) 2 Foreword This document (EN 13523-24:2004) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, ei
13、ther by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to: Aust
14、ria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13523-24:2004 (E) 3 Introduct
15、ion Pressure generated within a coil or a stack of sheets can affect the coating surface and cause marks of gloss transfer, plasticizer migration, etc. and even blocking/sticking. EN 13523-24:2004 (E) 4 1 Scope This part of EN 13523 describes the procedure for determining the resistance to blocking
16、and/or pressure marking of an organic coating on a metallic substrate. 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
17、document (including any amendments) applies. EN 13523-0, Coil coated metals Test methods Part 0: General introduction and list of test methods. EN 13523-4, Coil coated metals Test methods Part 4: Pencil hardness. EN 13523-22, Coil coated metals Test methods Part 22: Colour difference Visual comparis
18、on. EN 23270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing (ISO 3270:1991). 3 Principle Test panels are placed on top of each other in a stack, the two surfaces to be evaluated being in contact. The stack is placed in a press, where a uniform
19、pressure can be applied at an elevated temperature. 4 Apparatus 4.1 General Ordinary laboratory apparatus and glassware, together with the following; 4.2 Press designed to ensure a uniform pressure at elevated temperature. Both pressure and temperature shall be adjustable 5 Sampling See EN 13523-0.
20、6 Test panels See EN 13523-0. Test panels (usually 100 mm 120 mm) shall be flat and free from contamination. Cut edges shall be flat and any burrs shall be removed. For each system under evaluation, there shall be at least two test samples plus one reference sample. EN 13523-24:2004 (E) 5 7 Procedur
21、e 7.1 General In general, samples can be tested after curing of the coating, as soon as they are cooled down to room temperature. Place the panels in a stack, the two surfaces to be tested being in contact. Apply pressure to the samples by the press. Heat the stack in the press to the specified temp
22、erature. The test shall be allowed to continue for the agreed period of time. Recommended values are: - Pressure: 10 MPa Coil is stored “eye to the sky”. Pressure is caused only by the recoiling tension. - Pressure: 100 MPa Coil is stored “eyes horizontal”. The weight of the coil results into additi
23、onal pressure. This increased pressure is observed at the point of contact with the ground vertically through the coil wall. - Temperature: 50 C - Duration: 24 h For certain products and/or specific line parameters, other values may be used. Allow the press with the stack to cool down to room temper
24、ature for 24 h whilst maintaining the pressure. Carry out the evaluation at room temperature. In cases of dispute, the evaluation temperature shall be (23 2) C and the relative humidity shall be (50 5) %, in accordance with EN 23270. 7.2 Evaluation 7.2.1 Blocking/sticking Separate the panels and rat
25、e blocking/sticking, using a scale between 0 and 4: 0 The panels separate without sticking 1 The panels need to be separated using a light force 2 Separation can only be achieved using substantial force with an instrument, e.g. a knife, but without deforming the panels 3 Separation can only be achie
26、ved using an instrument, e.g. a knife, that will be forced between the samples, causing damage, pick off or permanent deformation 4 Separation cannot be achieved EN 13523-24:2004 (E) 6 7.2.2 Transfer of gloss and pressure marks After separating the panels and rating blocking and sticking, rate the p
27、ressure marking, using a scale between 0 and 4. Where relevant, the separated test panels shall be kept at room temperature until the 24 h assessment has been completed. 0 No pressure mark immediately after separation 1 No pressure marks remaining 24 h after separation 2 Light pressure marks remaini
28、ng 24 h after separation 3 Heavy pressure marks remaining 24 h after separation 4 Pressure marks remaining 24 h after separation which cannot be removed after subsequent heating NOTE The test can also give some indication of plasticizer migration. The degree of softening of a paint by the plasticize
29、r used in either the top or the backing coat is determined by checking the change in hardness according to EN 13523-4 and comparing to the reference sample. 8 Expression of results Blocking shall be expressed as a rate from 0 to 4 as described in 7.2.1. Pressure marks shall be expressed as a rate fr
30、om 0 to 4 as described in 7.2.2. 9 Precision No precision data are currently available. 10 Test report The test report shall contain at least the following information: a) all details necessary to identify the product tested; b) a reference to this part of EN 13523 (EN 13523-24); c) coating system a
31、nd coating parameters; d) pressure, temperature and duration of the test; e) result of the test, as indicated in clause 8; f) any deviation from the test method specified (e.g. time between production and testing); g) date of the test. EN 13523-24:2004 (E) 7 Bibliography EN 1396, Aluminium and alumi
32、nium alloys Coil coated sheet and strip for general applications Specifications. EN 10169-1, Continuously organic coated (coil coated) steel flat products Part 1: General information (definitions, materials, tolerances, test methods). ENV 10169-2, Continuously organic coated (coil coated) steel flat
33、 products Part 2: Products for building exterior applications. EN 10169-3, Continuously organic coated (coil coated) steel flat products Part 3: Products for building interior applications. EN ISO 4622, Paints and varnishes Pressure test for stackability (ISO 4622:1992). BS EN 13523-24:2004 BSI 389
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