www bzfxw com BRITISH STANDARD BS EN 434 1994 Resilient floor coverings — Determination of dimensional stability and curling after exposure to heat The European Standard EN 434 1994 has the status of[.]
BRITISH STANDARD Resilient floor coverings — Determination of dimensional stability and curling after exposure to heat I The European Standard EN 434:1994 has the status of a British Standard UDC 698.7:692.535.6:645.13:620.1:536.413 BS EN 434:1994 BS EN 434:1994 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y France Association franỗaise de normalisation Germany Deutsches Institut für Normung e.V Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Espola de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 November 1994 Amendments issued since publication © BSI 07-1999 Amd No Date Comments The following BSI references relate to the work on this standard: Committee reference PRM/60 Draft for comment 91/35315 DC ISBN 580 23121 标准分享网 www.bzfxw.com 免费下载 BS EN 434:1994 Contents Cooperating organizations National foreword Foreword Scope Normative references Principle Apparatus Sampling and preparation of test pieces Conditioning Procedure Calculation and expression of results Test report National annex NA (informative) Committees responsible National annex NB (informative) Cross-reference Figure — Scribing of test pieces Page Inside front cover ii 3 3 3 4 Inside back cover Inside back cover ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 07-1999 i BS EN 434:1994 National foreword This British Standard has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is the English language version of EN 434:1994 Resilient floor coverings — Determination of dimensional stability and curling after exposure to heat, published by the European Committee for Standardization (CEN) EN 434 was produced as a result of European discussions in which the United Kingdom took an active part There is no existing British Standard equivalent to EN 434 A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 4, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover © BSI 07-1999 ii 标准分享网 www.bzfxw.com 免费下载 EUROPEAN STANDARD EN 434 NORME EUROPÉENNE August 1994 EUROPÄISCHE NORM UDC 698.7:692.535.6:645.13:620.1:536.413 Descriptors: Floor coverings, textile floor coverings, tests, determination, dimensional stability, thermal resistance English version Resilient floor coverings — Determination of dimensional stability and curling after exposure to heat Revétements de sol résilients — Détermination de la stabilité dimensionnelle et de l’encurvation après exposition la chaleur Elastische Bodenbeläge — Bestimmung der Maßänderung and Schüsselung nach Wärmeeinwirkung ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This European Standard was approved by CEN on 1994-08-22 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status 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 Central Secretariat or to any CEN member This European Standard exists in three official versions (English, French, 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 Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1994 Copyright reserved to CEN members Ref No EN 434:1994 E EN 434:1994 Foreword This European Standard was prepared by Technical Committee CEN/TC 134, Resilient and textile floor coverings, the Secretariat of which is held by BSI This document was submitted to the formal vote and approved 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 February 1995, and conflicting national standards shall be withdrawn at the latest by February 1995 In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 07-1999 标准分享网 www.bzfxw.com 免费下载 EN 434:1994 Scope This European Standard specifies a method for determining the dimensional stability and curling of a resilient floor covering on exposure to heat Normative references This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies EN 428, Resilient floor coverings — Determination of overall thickness Principle 3.1 For dimensional stability, the relative variation of the distance between marks previously made on the test piece after heat treatment under specified conditions is determined 3.2 For curling, the vertical deformation appearing in a test piece after specified heat treatment is measured Sampling and preparation of test pieces Take a representative sample from the available material Before cutting the test pieces, lay out the sample in sheet form as flat as possible and mark the machine direction In the case of tiles, remove these from the packaging and lay them out Take three test pieces at equal distances from the sample, the distance between the outer edge of the sample and the nearest edge of the test piece being at least 100 mm, each of approximate dimensions (225 to 250) mm square, their edges being parallel or transverse to the direction of manufacture On each test piece, approximately 20 mm from the edges, scribe four lengths, two in each direction, at a distance of (200 ± 1) mm, and measure these on an optical bench (see Figure 1) Place each test piece on a support plate If present, measure the initial curling before carrying out the test ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Apparatus 4.1 A thermostatically-controlled ventilated oven, where the temperature throughout shall be (80 ± 2) °C and the radiation from the heating element shall not reach the test pieces or support places directly 4.2 Solid metal support plates, ground and covered with a film of polytetrafluoroethylene The shapes and dimensions of 4.1 and 4.2 shall be such that: — curling shall be measured without removing the test pieces from the support plates; — the clearance between the plates and the vertical walls of the oven shall be not less than 50 mm; — the vertical clearance between the support plates and between the plates and the oven shall be not less than 100 mm 4.3 An optical bench, range 200 mm and precision ± 0,02 mm 4.4 A pillar-mounted micrometer, or other device, accurate to at least 0,1 mm © BSI 07-1999 Figure — Scribing of test pieces Conditioning Condition the test pieces at a temperature of (23 ± 2) °C and relative humidity of (50 ± 5) % for a minimum of 24 h Maintain these conditions when carrying out the test EN 434:1994 Procedure 8.2 Curling Carry out the tests on the day of the initial length measurement At least h after the marks for the dimensional variation measurements have been made, measure the vertical distance between the support plate and the visible surface of the test piece in four places around the edge, usually the corners, where the distance is greatest Carry out the measurements with the pillar-mounted micrometer +15 Store the test pieces for 360 in the oven, which has previously been stabilized at (80 ± 2) °C Remove the metal plates bearing the test pieces from the oven Allow these to cool and recondition at a temperature of (23 ± 2) °C and relative humidity (50 ± 5) % for a further 24 h, unless otherwise specified for the product Reduce each of the actual measurements by the mean thickness of the floor covering measured as specified in EN 428 Calculate the mean value of the four differences for each test piece and the mean value for the three test pieces Express the results in millimetres to the nearest 0,5 mm NOTE The reconditioning period for all cork floor coverings should be days After reconditioning, take the following measurements: a) dimensional variations, i.e the new distance of each scribed length; and b) curling, i.e the maximum vertical distances on each edge, usually at the corners Test report The test report shall contain the following information: a) a reference to this standard, i.e EN 434; b) a complete identification of the product tested, including type, source, colour and manufacturer’s reference numbers; c) previous history of the sample; d) the mean value of dimensional stability in each direction; e) the mean value for curling; f) the mean value for initial curling, if any; g) any deviation from this standard which may have affected the results ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Calculation and expression of results 8.1 Dimensional stability For each of the test directions, record the variations for the six length measurements (two readings from three test pieces) Calculate the relative variation related to the initial lengths Calculate the mean value of the six results and express it as a percentage to the nearest 0,05 % © BSI 07-1999 标准分享网 www.bzfxw.com 免费下载 BS EN 434:1994 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/60 upon which the following bodies were represented: British Adhesives and Sealants Association British Board of Agrément British Floor Covering Manufacturers’ Association British Railways Board British Rubber Manufacturers’ Association Ltd Consumer Policy Committee of BSI Contract Flooring Association Cork Industry Federation Department of the Environment (Building Research Establishment) Federation of Plastering and Drywall Contractors Health Care Supplies South West Royal Institute of British Architects National annex NB (informative) Cross-reference ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Publication referred to Corresponding British Standard EN 428:1992 BS EN 428:1993 Resilient floor coverings — Determination of overall thickness © BSI 07-1999 BS EN 434:1994 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: 020 8996 9000 Fax: 020 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of 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