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1、BRITISH STANDARD BS EN 12759:2001 Rubber- or plastic- coated fabrics Determination of resistance to liquids The European Standard EN 12759:2001 has the status of a British Standard ICS 59.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffie
2、ldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12759:2001 This British Standard, having been prepared under the direction of the Sector Policy and Strategy Committee for Materials and Chemicals, was published under the authority of the Standards Policy and Strategy Co
3、mmittee on 26 September 2001 BSI 26 September 2001 ISBN 0 580 38044 0 National foreword This British Standard is the official English language version of EN 12759:2001. The UK participation in its preparation was entrusted to Technical Committee TCI/78, Coated fabrics, which has the responsibility t
4、o: 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 Standards Catalogue under the section entitled “Int
5、ernational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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
6、a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Europe
7、an 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 14, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendm
8、ents issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12759 August 2001 ICS 59.080.40 English version Rubber- or plastic-coated fabrics - Dete
9、rmination of resistance to liquids Supports textiles revtus de caoutchouc ou de plastique - Dtermination de la rsistance aux liquides Mit Kautschuk oder Kunststoff beschichtete Textilien - Bestimmung der Flssigkeitsbestndigkeit This European Standard was approved by CEN on 23 June 2001. CEN members
10、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 t
11、o 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 translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same stat
12、us as the official versions. 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 STANDAR
13、DIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12759:2001 E Licensed Copy: sheffieldun sheffieldun,
14、na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12759:2001 (E) 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 248 “Textiles and textile products“, the secretariat of which is held by BSI. This European Standard shall be given the status of a n
15、ational standard, either by publication of an identical text or by endorsement, at the latest by February 2002, and conflicting national standards 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
16、 which suggests a range of possible test temperatures. This standard includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, F
17、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12759:2001 (E) 3 1 Scope This European
18、 Standard describes two methods of evaluating the resistance of fabrics coated with plastics or with vulcanised rubber to the action of liquids by measurement of selected properties of the materials before and after immersion in selected liquids. The methods described in this European Standard conce
19、rn the following determinations : a) Method 1 : Change of physical properties after immersion in test liquids b) Method 2 : Change of physical properties after exposure and evaporation of volatile test liquids. 2 Normative references This European Standard incorporates by dated or undated reference,
20、 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 i
21、n it 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 atmospheres for conditioning and testing (ISO 2231:1989) EN ISO 2286-1 Rubber- or plastics-coated fabrics
22、- Determination of roll characteristics - Part 1: Methods for determination of length, width and net mass (ISO 2286-1:1998) 3 Principle This European Standard provides a procedure for exposing test specimens to the influence of liquids under defined conditions of temperature and time. Selected prope
23、rties are determined according to the relevant European or International Standards. Test specimens are then immersed in selected liquid(s) and the properties determined again. The percentage change or the values before and after immersion are measures of the resistance of the material to the selecte
24、d liquid(s). 4 Test liquids for methods 1 and 2 As commercial liquids may not have an entirely constant composition, a standard immersion liquid consisting of well-defined chemical compounds or mixture of compounds shall be used. Some suitable liquids are recommended in annex A (informative). When a
25、 commercial liquid is used, the test report shall mention all the available information about its origin, composition, properties, e.g. viscosity, aniline point, etc., and batch number. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1275
26、9:2001 (E) 4 NOTE For test purpose, it is usually desirable to use the liquid(s) with which the coated fabric will come into contact during use. When testing to determine the effect of chemical solutions, the concentration of the solutions should be appropriate to the proposed application. WARNING A
27、ppropriate safety precautions should be taken when preparing and handling test liquids, especially those known to be toxic, corrosive or flammable. Products giving off fumes should be handled only under an efficiently ventilated hood, corrosive products should not be allowed to come into contact wit
28、h the skin or ordinary clothing, and flammable products should be kept away from any source of ignition. In addition, attention is drawn to the possible damaging of test equipment (e.g. clamps or jaws) when using corrosive test liquids. 5 Test conditions for methods 1 and 2 5.1 Temperature Use a tes
29、t temperature approximating those found during use. Maintain the test temperature (T) at T ? 2 C. Unless otherwise specified or agreed upon, test temperature (T) should be one of the standard temperatures given in annex B. 5.2 Immersion period The following immersion periods are recommended : 22 h ?
30、 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 of immersion that equilibrium is allowed to be reached. To define this equilibrium, it is recommended to carry out preliminary me
31、asurements with several periods of immersion, recording the results as a function of time. Whenever practicable, the total immersion period should be chosen to extend far beyond the point of maximum variation. 5.3 Light Immersion tests shall be conducted in the absence of direct light. 5.4 Time laps
32、e between manufacturing and testing The minimum time lapse between manufacturing and testing shall be 16 h. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12759:2001 (E) 5 6 Conditioning atmosphere for methods 1 and 2 Test specimens shal
33、l be conditioned before immersion in one of the atmospheres in accordance with EN ISO 2231, unless otherwise specified in the standard relevant to the property to be tested. 7 Apparatus for methods 1 and 2 The apparatus to be used is determined by the temperature of immersion, the volatility of the
34、test liquid and the number and dimensions of the test specimens required for testing the selected property. At temperatures appreciably below the boiling point of the test liquid, use a stoppered vessel e.g glass bottle, tube, of such dimensions that the test specimens remain completely immersed in
35、the specified volume of test liquid and are freely exposed on all surfaces without restraint. At temperatures near the boiling point of the test liquid, fit the vessel with a reflux condenser or other suitable means of minimising evaporation of the test liquid, instead of the stopper. 8 Method 1 - C
36、hange of physical properties after immersion in test liquid. 8.1 Preparation of test specimens Select 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 wi
37、dth of the roll (according to EN ISO 2286-1) two sets of test specimens for 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 immersion Determine the selected properties on the first
38、set of test specimens using the respective EN or ISO standards (see clause 2). 8.3 Immediate properties after immersion 8.3.1 Immersion Place the test specimens, suitably separated, in a vessel as described in clause 7, with a volume of test liquid (clause 4) that shall be at least 15 times the comb
39、ined volume of the test specimens and sufficient to keep them totally immersed. If the conditions of test do not necessitate the use of a reflux condenser, stopper the vessel. Maintain the test liquid at the test temperature (T) during all the exposure period, within a tolerance of ? 2 C. Licensed C
40、opy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12759:2001 (E) 6 8.3.2 Preparation before testing At the end of the immersion period, bring the test specimens, if necessary, to the standard testing temperature, preferably by quickly transferring th
41、em to a fresh portion of test liquid at this temperature for a period of 5 min to 10 min. Remove the surplus test liquid from the surface of the test specimens. The method of removing the surplus liquid may vary with the nature of the liquid. When volatile, mobile liquids like iso-octane and toluene
42、 are used, remove quickly and wipe the test specimen with filter paper or a piece of textile which does not deposit lint. Some difficulty may be experienced in completely removing viscous, non-volatile liquids by this method and it may be necessary to dip the test specimen quickly in a suitable vola
43、tile liquid such as methanol and again wipe the test specimen with filter paper or a piece of textile which does not deposit lint. Visually assess the appearance of the test specimens against a piece of not immersed material. Note whether any change occurred or not and describe the eventual changes
44、observed. 8.3.3 Testing Test immediately after removal of the surplus liquid. Measure the selected physical property in accordance with the appropriate standard. 8.4 Expression of results Express the values before and after immersion or the change in properties as a percentage of the value for the o
45、riginal property before immersion. 9 Method 2 - Change of physical properties after immersion and evaporation of volatile test liquids 9.1 Preparation of test specimens Prepare the test specimens according to 8.1. 9.2 Determination of original properties before immersion Determine the original prope
46、rties according to 8.2 9.3 Properties after evaporation of volatile test liquid 9.3.1 Immersion Cut and immerse the test specimens in accordance with 8.3.1. 9.3.2 Evaporation of the volatile liquid At the end of the specified immersion period, remove the test specimens and hang them in a circulating
47、 air oven at a temperature of 70 C ? 2 C for a period of 2 h 0,1 h. At the end of Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12759:2001 (E) 7 the drying period, remove the test specimens from the oven and allow them to cool at room t
48、emperature. 9.3.3 Testing The time interval between removal from the oven and testing shall be not less than 1 h and not more than 2 h. Measure the selected physical property in accordance with the appropriate standard. 9.4 Expression of results Express the values before and after immersion or the c
49、hange in properties as a percentage of the value for the original property before immersion. 10 Test report The test report shall include the following particulars : a) a reference to this European Standard; b) the date of test; c) the conditioning and testing atmosphere; d) identification of the coated fabric; e) description of the test liquid (see clause 4); f) the method used (method 1 or method 2); g) the immersion temperature; h) the immersion period; i) appearance of the test specimens after immersion; j) the value of the measured properties before
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