BS-7399-1991.pdf
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1、BRITISH STANDARD BS 7399:1991 Method for Determination of delamination force of textile floor coverings Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:18:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7399:1991 This British Standard, having been prepared u
2、nder the direction of the Textiles and Clothing Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 29 March 1991 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference TCM/27 Draft for comment 90/36
3、476 DC ISBN 0 580 19475 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/27, upon which the following bodies were represented: Association of Consulting
4、 Scientists British Carpet Manufacturers Association Ltd British Polyolefin Textiles Association British Textile Technology Group Carpet Cleaners Association Contract Flooring Association Fibre Bonded Carpet Manufacturers Association International Wool Secretariat Man-made Fibres Producers Committee
5、 Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:18:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7399:1991 BSI 08-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Def
6、inition1 3Principle1 4Apparatus1 5Atmosphere for conditioning and testing1 6Test specimens1 7Procedure1 8Calculation and expression of results1 9Test report3 Appendix A Finding a median value of peaks on an autographic record4 Figure 1 Typical autographic trace2 Figure 2 Trace without definite peaks
7、2 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:18:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7399:1991 ii BSI 08-1999 Foreword This British Standard has been prepared under the direction of the Textiles and
8、 Clothing Standards Policy Committee. This method is intended primarily for quality control purposes and as a development tool. It does not give information on performance in use and does not give information on breakdown due to ageing which may be better achieved by a fatigue type test. A British S
9、tandard 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 British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cov
10、er, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank Univ
11、ersity, London South Bank University, Fri Dec 08 13:18:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7399:1991 BSI 08-19991 1 Scope This British Standard describes a method for the determination of the force required to separate the plies of a textile floor covering. It is applicable to all types
12、 of textile floor coverings with a secondary or foam backing. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definition For the purposes of this British Standard, the following definition applies. delamination force the force required to separa
13、te the plies of a textile floor covering, measured over a width of 50 mm and expressed in newtons 3 Principle The end of a test specimen is delaminated by hand and the force to continue delamination is measured on an autographic tensile tester under specified conditions. 4 Apparatus 4.1 Tensile test
14、ing machine, complying with clause 10 of BS 5214-1, i.e. capable of being operated at 100 10 mm/min. 4.2 Autographic load-extension recorder, with or without computer back-up. NOTEThe length of the trace in the direction of the extension axis of the chart is equal to the distance traversed by the mo
15、ving jaw. 4.3 Self-adhesive textile floor covering tape, 50 mm wide. 5 Atmosphere for conditioning and testing The atmosphere for conditioning and testing shall be the standard temperate atmosphere for testing textiles as specified in BS 1051, i.e. an atmosphere which has a relative humidity of 65 2
16、 % and a temperature of 20 2 C. 6 Test specimens 6.1 Cut out five specimens in each direction, each 50 mm wide and 200 mm long, sampled in accordance with BS 4664, with the long side in the direction to be tested. For foam backed products, apply a strip of 50 mm adhesive tape (4.3) to the foam backi
17、ng. 6.2 Take each test specimen and separate the plies by hand for a distance of approximately 50 mm from one end. 6.3 For products with mesh or less stable secondary backings, apply a 50 mm long piece of adhesive tape across the secondary backing to help keep it square and properly gripped in the t
18、est jaw. 7 Procedure 7.1 Clamp a separated ply of a test specimen in one jaw of the tensile testing machine (4.1) and then clamp the other ply in the other jaw ensuring that the tension is evenly applied and that the direction of separation will be perpendicular to the edges of the test specimen. 7.
19、2 With the autographic load-extension recorder (4.2) in action, set the traversing clamp in motion, and obtain a record of the force fluctuations as the delamination proceeds. Continue to the end of the test specimen. Test each of the other test specimens in turn. 7.3 If either ply breaks, or if sep
20、aration occurs at any other point (e.g. pile tufts pull through the primary backing or the tear transfers to inside a foam backing), record this failure and report the force at which it occurs. 8 Calculation and expression of results NOTEThe trace from the autographic recorder consists of a series o
21、f peaks, each representing the force at which the plies have separated, and troughs corresponding to the fall back of the force. 8.1 Calculate the delamination force as the median of the peak values from the central 50 % of the stripping trace, expressed in newtons. NOTEA typical trace is shown in F
22、igure 1. 8.2 From the recorded trace for each test specimen, mark and ignore the first and last 25 % along the length of the trace. Mark each individual peak in the central 50 % of the trace where a peak is defined as a definite turning point. Ignore minor irregularities and, where possible, relate
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