1、BRITISH STANDARD BSENISO 2231:1995 BS3424-2: 1992 Incorporating Amendment No.1 Testing coated fabrics Part2:Method4: Pre-conditioning and conditioning of coated fabrics for testing purposes The European Standard ENISO2231:1995 has the status of a British StandardBSENISO2231:1995 This British Standar
2、d, having been prepared under the directionof the Rubber StandardsPolicy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 28February1992 BSI 08-1999 First published September1982 Second edition February1992 The following BSI references relate to the work on t
3、his standard: Committee reference PRM/78 Draft for comment87/35824 DC ISBN0 580 20601 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/78, upon which the
4、following bodies were represented: British Nonwovens Manufacturers Association British Plastics Federation British Railways Board British Resin Manufacturers Association British Rubber Manufacturers Association Ltd. British Textile Confederation British Textile Technology Group Department of Health
5、Department of the Environment (Building Research Establishment) Electricity Industry in UnitedKingdom Furniture Industry Research Association Home Office Industrial Safety (Protective Equipment) Manufacturers Association London Regional Transport Made-up Textiles Association Ministry of Defence Nati
6、onal Union of Dyers, Bleachers and Textile Workers (NUDBTW) RAPRA Technology Ltd. SATRA Footwear Technology Centre Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No. Date Comments 8189 November 1995 Indicated by a sideline in the marginBSENISO2231:1995 BSI 0
7、8-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN ISO2231 3 Publication(s) referred to Inside back coverBSENISO2231:1995 ii BSI 08-1999 National foreword This Part of BS3424 has been prepared under the direction of the Plastics and Rubber Sta
8、ndards Policy Committee. It is identical with ISO2231:1989 “Rubber- or plastics-coated fabrics Standard atmospheres for conditioning and testing”, published by the International Organization for Standardization (ISO). This edition of BS3424-2 supersedes the1982 edition which is withdrawn. In1995 the
9、 European Committee for Standardization (CEN) accepted ISO2231:1989 as European Standard ENISO2231:1995. As a consequence of implementing the European Standard this British Standard is renumbered as BSENISO2231:1995 and any reference to BS3424-2:1992 should be read as a reference to BSENISO 2231:199
10、5. Where the coated fabric is single face or double texture, the textile element of the coated fabric is likely, depending upon the type of textile involved, to contain moisture which has been absorbed from the air. The actual amount of moisture absorbed depends upon the type of cloth construction,
11、the molecular make-up of the textile, the temperature and relative humidity of the surrounding atmosphere and the size and shape of the test piece or sample. Certain properties of the coated fabric, particularly its mass and those concerned with the breaking or stretching of threads, are affected by
12、 changes in the moisture content of the cloth. In order to standardize methods of test, it is therefore important to control the moisture content of the coated fabric under test where changes in properties of the textile due to differences in moisture content are likely to affect the results. This i
13、s done by conditioning and testing test specimens in a controlled atmosphere. Cross-references There is no British Standard corresponding toISO554:1976, which was prepared by ISO/TC125 “Test conditions”, but the ISO standard is referred to for information only. Additional information For the conditi
14、oning and testing of uncoated textiles, attention is drawn to BS1051:1981 and the fact that in that British Standard the tolerance on the relative humidity control is 2% as opposed to 5% due to the generally higher moisture imbibition of uncoated textiles and the consequential wider moisture hystere
15、sis. In the UK only atmospheres A and B, and where relevant atmospheres D of ISO2231 are used, as these are the atmospheres most generally applicable to the conditioning and testing of polymer coated textiles in temperate climates. In addition, atmospheres B and D are the recognized standard atmosph
16、eres for the conditioning and testing of plastics and rubber in temperate climates (seeBS2782 Methods of testing plastics Part0:1982 Introduction and BS903 Physical testing of rubber PartA35:1985 Temperatures, humidities and times for conditioning and testing of test pieces). However for contractual
17、 or trade purposes, the tropical atmospheres specified in C and E may be relevant. In any event it is recommended that the standard atmosphere selected for conditioning and testing should be reported in the test report(s) of the relevant method(s) of test. It is recommended that pre-conditioning, re
18、ferred to inclause4 should, when applicable, be conducted for a minimum period of1h.BSENISO2231:1995 BSI 08-1999 iii 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
19、British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, theENISO title page, pages2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and m
20、ay have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM ENISO2231 March1995 ICS83.140 Descriptors: Rubber products, plastics products, coated fabrics, fabrics coated with rubber, fabrics co
21、ated with plastics, tests, testing conditions, test atmospheres, standard atmospheres, specimen preparation English version Rubber- or plastics-coated fabrics Standard atmospheres for conditioning and testing (ISO2231:1989) Supports textiles revtus de caoutchouc ou de plastique Atmosphres normales d
22、e conditionnement et dessai (ISO2231:1989) Mit Kautschuk oder Kunststoff beschichtete Textilien Normalklimate zur Konditionierung und Prfung (ISO 2231:1989) This European Standard was approved by CEN on1993-11-22. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipul
23、ate 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 exi
24、sts 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 bo
25、dies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secr
26、etariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. ENISO2231:1995 EENISO2231:1995 BSI 08-1999 2 Foreword This European Standard has been taken over by the Technical Comm
27、ittee CEN/TC248, Textiles and textile products, from the work of ISO/TC45, Rubber and robber products, of the International Organization for Standardization (ISO). This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, a
28、t the latest by September1995, and conflicting national standards shall be withdrawn at the latest by September1995. According to CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Icel
29、and, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Normative reference 3 3 Definitions 3 4 Pre-Conditioning 3 5 Characteristics of test atmospheres 3 6 Methods of conditioning 3ENISO2231:1995 BSI 08-1999
30、3 1 Scope This International Standard specifies the requirements for conditioning and methods of conditioning employed for rubber- or plastics-coated fabrics. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this Interna
31、tional Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Membe
32、rs of IEC and ISO maintain registers of currently valid International Standards. ISO554:1976, Standard atmospheres for conditioning and/or testing Specifications. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 reference atmosphere a theoretical at
33、mosphere to which values of characteristics determined under different atmospheric conditions can be related when the relevant conversion factors are known NOTEThe standard reference atmosphere is specified in ISO554. 3.2 standard atmosphere for conditioning and for testing actual atmosphere in whic
34、h tests are made 3.3 method of conditioning characteristic atmosphere and time of exposure to it for a coated fabric in the accomplishment of a test 3.4 standard condition condition reached by the coated fabric when it is in equilibrium with a standard atmosphere for conditioning and testing 3.5 moi
35、sture equilibrium equilibrium reached by the coated fabric when, after free exposure to air in motion, there is no appreciable change in mass 4 Pre-conditioning When the textile substrate is of a highly hygroscopic material or where the method of test requires a high degree of accuracy, equilibrium
36、(see3.5) shall be approached from the dry side of the hysteresis curve by pre-conditioning the test pieces in an atmosphere having a relative humidity of not greater than10% and a temperature of between60 C and70 C. NOTEAir at65% relative humidity and20 C will, when heated at constant pressure to be
37、tween60 C and70 C, have a relative humidity of approximately5%. Higher temperatures can lead to changes in some coatings. 5 Characteristics of test atmospheres The use of one of the following atmospheres shall be fixed by the particular standard or specification for each test or material. The choice
38、 of one of these alternatives will depend on the prevalent usage in individual countries and the variant used shall be reported in the test report. Atmosphere “A” temperature 20 C 2 C; relative humidity65%5% R.H. Atmosphere “B” temperature23 C 2 C; relative humidity50%5% R.H. Atmosphere “C” (tropica
39、l) temperature27 C 2 C; relative humidity65%5% R.H. Atmosphere “D” (temperature control only) temperature23 C 2 C. Atmosphere “E” (tropical temperature control only) temperature27 C 2 C. 6 Methods of conditioning The use of one of the following methods of conditioning shall be fixed by the particula
40、r standard or specification for each test or material. The method used shall be reported in the test report. 6.1 Method of conditioning “1” The test pieces shall be freely exposed to the standard atmosphere “A”, “B” or “C” until they are in equilibrium. Equilibrium with the standard atmosphere is de
41、emed to have been reached when successive weighings, at intervals of2h, of the test pieces freely exposed to the moving air, differ by less than0,1%.ENISO2231:1995 4 BSI 08-1999 For fabrics coated on one side only, a minimum of16h exposure is recommended. For fabrics coated on both sides, a minimum
42、of24h is recommended. 6.2 Method of conditioning “2” The test pieces shall be freely exposed to the standard atmosphere “D” or “E” for a period of3h.BSENISO2231:1995 BSI 08-1999 Publication(s) referred to See national foreword.BSENISO 2231:1995 BS3424-2: 1992 BSI 389 Chiswick High Road London W4 4AL
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