1、BRITISH STANDARD BS ISO 3011:1997 Rubber- or plastics-coated fabrics Determination of resistance to ozone cracking under static conditions ICS 59.080.40BSISO3011:1997 This British Standard, having been prepared under the directionof the Sector Board for Materials and Chemicals, was published under t
2、he authority of the Standards Board and comes into effect on 15August1997 BSI 09-1999 ISBN 0 580 27874 3 National foreword This British Standard reproduces verbatim ISO 3011:1997and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committe
3、e TCI/78, Coated fabrics, which has the responsibility to: aid enquirers to understand 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 de
4、velopments and promulgate them in the UK. 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 Ca
5、talogue under the section entitled “International Standards Correspondence Index”, or 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 c
6、orrect application. Compliance with a 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 and ii, theISO title page, pages ii to iv, pages1to3 and a back cover. This standard has been updat
7、ed (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO3011:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword iii Text of IS
8、O3011 1ii blankBSISO3011:1997 ii BSI 09-1999 Contents Page Foreword iii 1 Scope 1 2 Normative references 1 3 Principle 1 4 Apparatus 1 5 Test pieces 2 6 Time intervals before testing 2 7 Test conditions 2 8 Procedure 3 9 Test report 3 Figure 1 Test piece holder 2BSISO3011:1997 BSI 09-1999 iii Forewo
9、rd ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technic
10、al committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of el
11、ectrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75%of the member bodies casting a vote. International Standard ISO3011was prepared b
12、y Technical Committee ISO/TC45, Rubber and rubber products. This third edition cancels and replaces the second edition (ISO3011:1981), which has been technically revised. Descriptors: Fabrics, coated fabrics, fabrics coated with rubber, fabrics coated with plastics, tests, artificial ageing tests, c
13、racking tests, determination, chemical resistance, ozone.iv blankBSISO3011:1997 BSI 09-1999 1 WARNING Persons 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 the respo
14、nsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies a method for the determination of the resistance of fabrics coated with rubber or plastics to ozone cracking unde
15、r static conditions. The test is designed to determine the relative resistance to cracking of fabric coated with rubber or plastics when exposed under static strain to air containing ozone in the absence of direct sunlight. Like all ageing tests, it should be considered as a means of comparing artic
16、les of the same composition and destined for the same application, but not as an absolute criterion. It is preferable to limit the significance of the test by considering it only as a means of control when a fabric attains a resistance superior to a threshold given in comparison with a certain type
17、of degradation. Taking these remarks into account, the results obtained at the time of test cannot be taken as a prediction of the length of life of the product. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this Int
18、ernational Standard. At the time of publication, the editions indicated were 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 editions of the standards listed below.
19、Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1431-1:1989, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: Static strain test. ISO 2286-1:, Rubber- or plastics-coated fabrics Determination of roll characteristics Part1:Methods for
20、determination of the length, width and net mass of a roll 1) . 3 Principle Test pieces are exposed to ozone under specified conditions. The effects of the ozone are assessed by measurement of the time at which the first crack appears or of the time of exposure during which no cracks appear, as appro
21、priate. 4 Apparatus 4.1 Test chamber and ancillary apparatus, as specified in ISO1431-1. 4.2 Test piece holder, comprising a mandrel and clamps (see Figure 1). The diameter of the mandrel shall be2times, 5times, 10times or20times the thickness of the test piece, as agreed between the interested part
22、ies, but it shall not be less than0,8mm. The mandrel and clamps shall be made of a material that does not absorb ozone, for example stainless steel, polymethacrylate, wood coated with a lacquer that does not absorb ozone, or duralumin, and shall have a smooth finish. 1) To be published. (Revision, i
23、n parts, of ISO 2286:1986)BSISO3011:1997 2 BSI 09-1999 5 Test pieces 5.1 Type The test pieces shall be of sufficient size to permit proper evaluation of the exposed surface after test, and satisfactory comparison of different test pieces. The preferred size is25mm wide and100mm long. 5.2 Selection T
24、est pieces shall be taken at least50mm from the selvedge of a sample which is as representative as possible of the whole consignment, in accordance with ISO2286-1. 5.3 Number Three test pieces in each direction of the fabric for each coated face shall be prepared. 6 Time intervals before testing Unl
25、ess otherwise specified for technical reasons, the following requirements apply: For non-product tests, the minimum time between manufacture and commencement of testing shall be16h. The maximum time between manufacture and testing shall be4weeks. For product tests, the minimum time between manufactu
26、re and commencement of testing shall be120h, during which period the test pieces shall be stored at the standard laboratory temperature. The maximum time between manufacture and testing shall be three months, and the maximum time between receipt of the product by the test laboratory and testing shal
27、l be two months. For evaluations intended to be comparable, the tests shall, as far as possible, be carried out after the same time interval and at the same temperature. 7 Test conditions 7.1 Ozone concentration The ozone concentration shall comply with the requirements of subclause 8.1 of ISO1431-1
28、:1989. 7.2 Temperature The temperature of test shall comply with the requirements of subclause8.2 of ISO1431-1:1989. 7.3 Mounting of test pieces under stress and conditioning The test piece shall be wrapped round the mandrel of the test piece holder with the surface under test on the outside and the
29、 ends of the test piece held by the clamps tightly enough for the mandrel just to be able to revolve freely in the test piece. Several test pieces of the same thickness may be wrapped around a single mandrel. Figure 1 Test piece holderBSISO3011:1997 BSI 09-1999 3 Where multi-ply coatings are to be t
30、ested, they may be tested as single-faced fabrics, vulcanized under the same conditions as the final multi-ply product. Where this is not practical, then the rubber compound shall be tested in accordance with ISO1431-1. The test piece, assembled on its mandrel, shall be conditioned in a substantiall
31、y ozone- and draught-free atmosphere at the standard laboratory temperature for48h, after which the test piece shall be placed in the test chamber. 8 Procedure WARNING Ozone is highly toxic. Appropriate measures shall be taken to minimize the exposure of the operator. Carry out the procedure in acco
32、rdance with clause9 of ISO1431-1:1989, disposing the test pieces in the chamber so that they are at least10mm from each other and from the wall of the chamber. Examine the test pieces under a magnification of 7. 9 Test report The test report shall include the following particulars: a) a reference to
33、 this International Standard; b) all details necessary for identification of the sample; c) the thickness of the test piece and the mandrel diameter; d) the ozone concentration and the method of measuring it; e) the temperature of test; f) the time, in hours, at which the first crack appeared on eac
34、h test piece or the time of exposure during which no cracks appeared, as appropriate.BS ISO 3011:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europ
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