SIST EN 12759:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mit Kautschuk oder Kunststoff beschichtete Textilien - Bestimmung der FlüssigkeitsbeständigkeitSupports textiles revetus de caoutchouc ou de plastique - Détermination de la résistance aux liquidesRubber- or plastic-coated fabrics - Determination of resistance to liquids59.080.40WHNVWLOLMHCoated fabricsICS:Ta slovenski standard je istoveten z:EN 12759:2001SIST EN 12759:2001en01-december-2001SIST EN 12759:2001SLOVENSKI
STANDARD



SIST EN 12759:2001



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12759August 2001ICS 59.080.40English versionRubber- or plastic-coated fabrics - Determination of resistanceto liquidsSupports textiles revêtus de caoutchouc ou de plastique -Détermination de la résistance aux liquidesMit Kautschuk oder Kunststoff beschichtete Textilien -Bestimmung der FlüssigkeitsbeständigkeitThis European Standard was approved by CEN on 23 June 2001.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 concerning such nationalstandards may be obtained on application to the 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 own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12759:2001 ESIST EN 12759:2001



EN 12759:2001 (E)2ForewordThis European Standard has been prepared by Technical Committee CEN/TC 248 "Textilesand textile products", the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publicationof an identical text or by endorsement, at the latest by February 2002, and conflicting nationalstandards shall be withdrawn at the latest by February 2002.EN 12759 contains two informative annexes : annex A, which gives examples of test liquids,and annex B which suggests a range of possible test temperatures.This standard includes a Bibliography.According to the CEN/CENELEC Internal Regulations, the national standards organizationsof the following countries are bound to implement this European Standard: Austria, Belgium,Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the UnitedKingdom.SIST EN 12759:2001



EN 12759:2001 (E)31 ScopeThis European Standard describes two methods of evaluating the resistance of fabrics coatedwith plastics or with vulcanised rubber to the action of liquids by measurement of selectedproperties of the materials before and after immersion in selected liquids.The methods described in this European Standard concern the following determinations :a) Method 1 : Change of physical properties after immersion in test liquidsb) Method 2 : Change of physical properties after exposure and evaporation of volatiletest liquids.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisionsof any of these publications apply to this European Standard only when incorporated in it byamendment or revision. For undated references the latest edition of the publication referred toapplies (including amendments).EN ISO 2231
Rubber- or plastics-coated fabrics - Standard atmospheres for conditioning andtesting (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 PrincipleThis European Standard provides a procedure for exposing test specimens to the influence ofliquids under defined conditions of temperature and time. Selected properties are determinedaccording to the relevant European or International Standards. Test specimens are thenimmersed in selected liquid(s) and the properties determined again. The percentage change orthe values before and after immersion are measures of the resistance of the material to theselected liquid(s).4 Test liquids for methods 1 and 2As commercial liquids may not have an entirely constant composition, a standard immersionliquid consisting of well-defined chemical compounds or mixture of compounds shall be used.Some suitable liquids are recommended in annex A (informative).When a commercial liquid is used, the test report shall mention all the available informationabout its origin, composition, properties, e.g. viscosity, aniline point, etc.,
and batch number.SIST EN 12759:2001



EN 12759:2001 (E)4NOTE
For test purpose, it is usually desirable to use the liquid(s) with which the coatedfabric will come into contact during use. When testing to determine the effect of chemicalsolutions, the concentration of the solutions should be appropriate to the proposed application.WARNING
Appropriate safety precautions should be taken when preparing and handling testliquids, especially those known to be toxic, corrosive or flammable. Products giving off fumesshould be handled only under an efficiently ventilated hood, corrosive products should not beallowed to come into contact with the skin or ordinary clothing, and flammable productsshould be kept away from any source of ignition.In addition, attention is drawn to the possible damaging of test equipment (e.g. clamps orjaws) when using corrosive test liquids.5 Test conditions for methods 1 and 25.1 TemperatureUse a test temperature approximating those found during use. Maintain the testtemperature (T) at T
2 °C.Unless otherwise specified or agreed upon, test temperature (T) should be one of the standardtemperatures given in annex B.5.2 Immersion periodThe following immersion periods are recommended :22 h
0,25 h ;
46 h
0,25 h ;
72 h
2 h ;
168 h
2 h ;
multiples of 7 days
2 h.NOTE
When testing for changes in physical properties, it is advisable to use such a period ofimmersion that equilibrium is allowed to be reached. To define this equilibrium, it isrecommended to carry out preliminary measurements with several periods of immersion,recording the results as a function of time. Whenever practicable, the total immersion periodshould be chosen to extend far beyond the point of maximum variation.5.3 LightImmersion tests shall be conducted in the absence of direct light.5.4 Time lapse between manufacturing and testingThe minimum time lapse between manufacturing and testing shall be 16 h.SIST EN 12759:2001



EN 12759:2001 (E)56 Conditioning atmosphere for methods 1 and 2Test specimens shall be conditioned before immersion in one of the atmospheres inaccordance with EN ISO 2231, unless otherwise specified in the standard relevant to theproperty to be tested.7 Apparatus for methods 1 and 2The apparatus to be used is determined by the temperature of immersion, the volatility of thetest liquid and the number and dimensions of the test specimens required for testing theselected property. At temperatures appreciably below the boiling point of the test liquid, use astoppered vessel
e.g glass bottle, tube, of such dimensions that the test specimens remaincompletely immersed in the specified volume of test liquid and are freely exposed on allsurfaces without restraint. At temperatures near the boiling point of the test liquid, fit thevessel with a reflux condenser or other suitable means of minimising evaporation of the testliquid, instead of the stopper.8 Method 1 - Change of physical properties after immersion in test liquid.8.1 Preparation of test specimensSelect properties that are considered relevant to the end-use (for example : tensile strength,coating adhesion, mass per unit area, tear resistance, low-temperature properties, etc.).Cut in the usable width of the roll (according to EN ISO 2286-1) two sets of test specimensfor each property as specified in the relevant EN or ISO standard.Condition all the test specimens according to clause 6.8.2 Determination of original properties before immersionDetermine the selected properties on the first set of test specimens using the respective EN orISO standards (see clause 2).8.3 Immediate properties after immersion8.3.1 ImmersionPlace the test specimens, suitably separated, in a vessel as described in clause 7, with avolume of test liquid (clause 4) that shall be at least 15 times the combined volume of the testspecimens and sufficient to keep them totally immersed. If the conditions of test do notnecessitate the use of a reflux condenser, stopper the vessel. Maintain the test liquid
at thetest temperature (T) during all the exposure period, within a tolerance of
2 °C.SIST EN 12759:2001



EN 12759:2001 (E)68.3.2 Preparation before testingAt the end of the immersion period, bring the test specimens, if necessary, to the standardtesting temperature, preferably by quickly transferring them to a fresh portion of test liquid atthis temperature for a period of 5 min to 10 min.Remove the surplus test liquid from the surface of the test specimens. The method ofremoving the surplus liquid may vary with the nature of the liquid. When volatile, mobileliquids like iso-octane and toluene are used, remove quickly and wipe the test specimen withfilter paper or a piece of textile which does not deposit lint. Some difficulty may beexperienced in completely removing viscous, non-volatile liquids by this method and it maybe necessary to dip the test specimen quickly in a suitable volatile liquid such as methanol andagain wipe the test specimen with filter paper or a piece of textile which does not deposit lint.Visually assess
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