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1、BRITISH STANDARD BS EN 12280-3:2002 Rubber- or plastic-coated fabrics Accelerated ageing tests Part 3: Environmental ageing The European Standard EN 12280-3:2002 has the status of a British Standard ICS 59.080.40 ? BS EN 12280-3:2002 This British Standard, having been prepared under the direction of
2、 the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 18 September 2002 BSI 18 September 2002 ISBN 0 580 40316 5 National foreword This British Standard is the official English language version of EN 122
3、80-3:2002. It supersedes clause 5 of BS 3424-12:1996 which is deleted by amendment. The UK participation in its preparation was entrusted to Technical Committee TCI/78, Coated fabrics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request t
4、o its secretary. Cross-references 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 Electr
5、onic Catalogue or of British 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 un
6、derstand the text; present to 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 compr
7、ises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover 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. DateComments EUROPEAN STANDARD NORME EUROPENN
8、E EUROPISCHE NORM EN 12280-3 August 2002 ICS 59.080.40 English version Rubber- or plastic-coated fabrics - Accelerated ageing tests - Part 3: Environmental ageing Supports textiles revtus de caoutchouc ou de plastique - Essais de vieillissement acclr - Partie 3: Vieillissement dans un environnement
9、ractif Mit Kautschuk oder Kunststoff beschichtete Textilien - Beschleunigte Alterungsprfungen - Teil 3: Umweltbezogene Alterung This European Standard was approved by CEN on 17 May 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for givi
10、ng 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 Management Centre or to any CEN member. This European Standard exists in three official version
11、s (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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech
12、 Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue
13、de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12280-3:2002 E EN 12280-3:2002 (E) 2 Contents page Foreword.3 Introduction 4 1Scope5 2Normative references5 3Principle .5 4Apparatus.5 5Test specim
14、ens .6 5.1Selection 6 5.2Dimensions6 5.3Quantity6 6Procedure.6 7Assessment.6 8Calculation and expression of results6 9Test report7 Annex A (informative) Examples of physical properties.8 EN 12280-3:2002 (E) 3 Foreword This document EN 12280-3:2002 has been prepared by Technical Committee CEN/TC 248
15、“Textiles and textile products“, the secretariat of which is held by BSI. 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 2003, and conflicting national standards shall be withdrawn at th
16、e latest by February 2003. This European Standard 12280 “Rubber- or plastic coated fabrics- Accelerated ageing tests” consists of the following parts: Part 1: Heat ageing Part 2: Physical ageing: effect of light or weathering Part 3: Environmental ageing Consideration is being given to preparing fur
17、ther parts, to cover such processes as biochemical ageing. This Part contains an annex A informative. WARNINGPersons using this standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is th
18、e responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
19、Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 12280-3:2002 (E) 4 Introduction Ageing refers to all “slow and irreversible“ changes
20、 in the properties of a material resulting from its own instability, or from the effects of the environment. This alteration can affect the chemical structure of the polymers or additives, the composition of the material, or its physical condition. NOTECombustion is not considered to be an ageing pr
21、ocess, as the deterioration happens very rapidly. Accelerated ageing methods are used as it is practically impossible to obtain experimental results under normal conditions of utilisation. These methods involve simulations which reproduce the normal conditions of utilisation as closely as possible,
22、but where the parameters are set so that ageing occurs more rapidly. This standard deals solely with accelerated ageing methods. EN 12280-3:2002 (E) 5 1 Scope This European Standard describes a test procedure to assess the effect of humidity in combination with relatively high temperatures on the re
23、levant physical properties of coated fabrics. It is applicable to all coated fabrics for which it is necessary to assess the long-term resistance to hydrolysis which can result from exposure to warm atmospheres with high moisture content. It is not recommended to evaluate materials that are immersed
24、 in water during use. 2 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
25、amendments to or revisions of any of these publications apply to this European Standard only when incorporated by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN ISO 2231, Rubber- or plastics-coated fabrics Standard a
26、tmospheres for conditioning and testing (ISO 2231:1989). EN ISO 2286-1, Rubber- or plastics-coated fabrics Determination of roll characteristics Part 1: Methods for determination of length, width and net mass (ISO 2286-1:1998). 3 Principle Test specimens of coated fabrics are exposed for at least 1
27、week to an atmosphere of air having at least 95 % relative humidity and a temperature of 70 C. Selected physical properties are determined on unexposed test specimens and on other test specimens after exposure. NOTEIf higher temperatures are used, for example for faster quality control, the results
28、should be verified by comparison with this reference method. 4 Apparatus 4.1Air oven equipped with a ventilator capable of providing air 5 times to 15 times the internal volume of the oven per hour. The incoming air shall be at the temperature specified before coming into contact with the test speci
29、mens. NOTEThe air speed at the thermometer and hygrometer contact should be not less than 3 m?s-1. No copper or copper alloy shall be within the ageing chamber of the oven. The capacity of the air oven shall be of such a size that the total volume of the test specimens does not exceed 10 % of the fr
30、ee air space of the oven. Means shall be provided for suspending the test specimens vertically within the oven such that they are not within 10 mm of each other nor within 50 mm of the inner surfaces of the oven. Means shall be provided for maintaining the temperature of the oven at (70 2) C or at a
31、 temperature otherwise specified. EN 12280-3:2002 (E) 6 Any electric elements used for heating the incoming air shall be shielded to avoid direct radiation onto the test specimens. Do not inject directly live steam at temperature above 70 C to achieve the required relative humidity of the atmosphere
32、. 4.2Thermometer or other temperature indicating device to record the ageing temperature. 4.3Wet-and-dry bulb hygrometer indicating the relative humidity. 5 Test specimens 5.1 Selection Test specimens shall be cut from an area with no functional or visible flaws and shall be located within the full
33、length of the coated fabric and its usable width as defined in EN ISO 2286-1. 5.2 Dimensions The dimensions of the test specimens shall be chosen so that they are suitable for the tests to be subsequently carried out after ageing. 5.3 Quantity The number of test specimens selected shall be as requir
34、ed by the particular physical tests selected (see clause 7). 6 Procedure Pre-heat the oven to the operating atmosphere of (70 2) C and at least 95 % relative humidity. Place the test specimens in the oven so that they are freely exposed to air on all sides and not exposed to light. Avoid simultaneou
35、s ageing of different types of compounds. After (168 2) h (i.e. 7 days) or (336 2) h (i.e. 14 days), or multiples thereof, remove the test specimens from the oven and condition them in the appropriate atmosphere from EN ISO 2231 for at least 24 h. 7 Assessment Compare the properties of the aged mate
36、rial within 2 days, with those of the unaged material using appropriate test methods, e.g. those relevant to the material specification or to the characteristic under investigation. 8 Calculation and expression of results Using the method(s) identified in clause 7, either calculate the actual value
37、of test result after ageing, or the percentage change when compared against the unaged material. EN 12280-3:2002 (E) 7 9 Test report The test report shall include the following: a) reference to this European Standard; b) the date of the test; c) the conditioning and testing atmosphere; d) the identi
38、fication of the coated fabric; e) the exposure period; f) the properties measured and the results of the assessment conducted in accordance with clause 7; g) details of any deviations from the standard test procedure. EN 12280-3:2002 (E) 8 Annex A (informative) Examples of physical properties The di
39、fferent physical properties tested can be for example: De Mattia flexion resistance, according to EN ISO 7854; resistance to shear flexing and rubbing, according to EN ISO 5981, (particularly method 2, without the pressure foot); coating adhesion, according to EN ISO 2411; abrasion resistance (Marti
40、ndale apparatus) according to EN ISO 12947-2, or according prEN 5470-2. blank BS EN 12280-3:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe
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