1、BRITISH STANDARD BS 4569:1983 Method of test for Ignitability (surface flash) of pile fabrics and assemblies having pile on the surface UDC 677.014.27:543.873:677-488.3BS4569:1983 This British Standard, having been prepared under the directionof the Fibres, Yarns, Fabrics and Production StandardsCom
2、mittee, was published under the authority ofthe Board of BSI and comesintoeffect on 28February1983 BSI 10-1999 First published February 1970 First revision February 1983 The following BSI references relate to the work on this standard: Committee reference FBM/19 Draft for comment 81/37067 DC ISBN 0
3、580 13208 0 Cooperating organizations The Fibres, Yarns, Fabrics and Production Standards Committee under whose direction this British Standard was prepared, consists of representatives from the following: Association of Jute Spinners and Manufacturers British Nonwoven Manufacturers Association Brit
4、ish Railways Board British Textile Employers Association* Central Council of the Irish Linen Industry Consumer Standards Advisory Committee of BSI* Department of Industry (Chemicals and Textiles) Institute of Purchasing and Supply International Wool Secretariat* Knitting Industries Federation Ltd. M
5、an-made Fibres Producers Committee* Manchester Chamber of Commerce and Industry Ministry of Defence* Narrow Fabrics Federation Warp Knitters Association Ltd. The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee
6、 entrusted with the preparation of this British Standard: Association of Heavy Textile Proofers of Great Britain British Burn Association British Clothing Industry Association British Lace Federation British Plastics Federation British Resin Manufacturers Association British Textile Rental Associati
7、on British Throwsters Association Chemical Industries Association Chief and Assistant Chief Fire Officers Association Continental Quilt Association Department of Health and Social Security Department of Industry (Laboratory of the Government Chemist) Department of the Environment (PSA) Department of
8、 Trade Department of Trade (Consumer Safety Unit) Industrial Safety (Protective Equipment) Manufacturers Association Design Council Manchester Testing House Royal Society for the Prevention of Accidents Soap and Detergent Industry Association Society of Dyers and Colourists Society of Motor Manufact
9、urers and Traders Limited Textile Institute Textile Research Council Amendments issued since publication Amd. No. Date of issue CommentsBS4569:1983 BSI 10-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 Definition 1 3 Principle 1 4 Apparatus 1 5 Conditioning
10、 and testing atmospheres 1 6 Health and safety of operators 1 7 Test specimens 3 8 Procedure 3 9 Assessment 4 10 Test report 4 Figure 1 Apparatus with specimen mounted 2 Figure 2 Burner 3 Publications referred to Inside back coverBS4569:1983 ii BSI 10-1999 Foreword This British Standard has been pre
11、pared under the direction of the Fibres, Yarns, Fabrics and Production Standards Committee and forms a revision of BS4569:1970 which is now withdrawn. When the standard was originally prepared, a number of incidents had occurred in which fabrics having a long pile, usually in imitation of a fur, had
12、 become ignited and exhibited what is known as “surface flash”. This phenomenon results from the high flammability of the pile fibres and is accompanied by a very rapid spread of flame across the surface of the fabric, usually without significant damage to the ground cloth. A method of testing pile
13、fabrics for susceptibility to this behaviour was evolved by the Flammability Working Party of the Textile Institute 1)and the method of test described herein is similar to that proposed but with the following differences. a) A mechanical device for holding and moving the gas burner has been included
14、 instead of the manual procedure described earlier. b) A substantially smaller test specimen is specified. c) The sides of the specimen are not stapled back and the specimen is mounted on a non-combustible back-plate. d) Only one traverse of the specimen is made instead of four. e) Use of the wash b
15、ottle has been deleted. This method of test has been applied to a wide variety of pile fabrics and has been found to give consistent results in the detection of liability to surface flash. 2) The method deals solely with surface flash and is inappropriate for determination of the total flammability
16、of pile fabrics; this latter should be related to BS5438 and the various performance standards which have been developed for different end uses. This revision has been prepared to take account of a number of technical changes, the most important of which is the introduction of a procedure for testin
17、g specimens made up from two or more small pieces of the fabric under test when the sample is not sufficiently large to provide complete specimens of the required size, e.g.when a fabric taken from a toy is being tested. A British Standard does not purport to include all the necessary provisions of
18、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 cover, an inside front cover, pages i and ii, pages1 to4, an inside bac
19、k 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. 1) See J.Text. Inst.,1968, 59,47. 2) See Text. Inst. and Industr.,1969,7, No.10,268.BS4569:1983 BSI 10-1999
20、 1 1 Scope This British Standard describes a test, the result of which is expressed as pass or fail, which is suitable for pile fabrics and simulated fur fabrics, except floor coverings, and is intended solely for determining whether the pile of these fabrics will promote the rapid spread of flame w
21、ith which it is in transient contact. The method is applicable to raised fabrics if required and to assemblies having a pile on the surface. IMPORTANT NOTE. The result of this laboratory test relates to the behaviour of the test specimens as supplied under the particular conditions of test, and does
22、 not take into consideration the effects of ageing, washing, soiling, etc. that may be encountered during the life of a product. It has to be recognized that this test cannot give a full assessment of fire properties in all situations, for instance a pass result does not guarantee freedom from surfa
23、ce flash after heating e.g.by exposure to radiant heat. 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. surface flash rapid spread of flame over the surface o
24、f a material without ignition of its basic structure NOTEHowever, if ignition of the basic structure occurs simultaneously or sequentially with surface flash, it is not considered as part of surface flash. 3 Principle A sheet of fabric is held vertically in a substantially draught-free enclosure and
25、 a flame is moved across the surface of the pile at a known speed to determine whether flame from the igniting source flashes over the surface of the pile. 4 Apparatus 4.1 Non-combustible backplate, at least400mm by130mm with two horizontal bars for clamping the specimen to it in such a way that the
26、 top edge of the specimen is level with the top edge of the backplate. In the vertical plane the backplate shall be fixed parallel to the guide rails of the burner. A means shall be provided for adjusting the position of the backplate in the direction of its normal axis (seeFigure 1), so that the pi
27、le surface of the specimen is5mm from the end of the burner tube when the latter is in the horizontal position. 4.2 Horizontal tube burner 3) , of3mm bore with the dimensions as shown in Figure 2. The burner shall be mounted on guide rails or pivots so that it can move in a horizontal line parallel
28、to the backplate, in such a way, that, when the igniting flame approaches and is applied to the specimen, the axis of the burner tube is substantially normal to the plane of the specimen, and is directed to a point15mm above the upper edge of the lower horizontal bar. For adjustment of the size of t
29、he flame, the burner tube shall be capable of being held with its axis vertical. 4.3 Supply of commercial butane, complying with BS4250. 4.4 Means for moving the burner horizontally acrossthe fabric, at a linear speed of approximately150 mm per second with the end of the burner tube5mm from the surf
30、ace of the fabric pile. Figure 1 depicts suitable apparatus in which the burner is caused to traverse in front of the specimen by a cord attached to a piston falling in a vertical cylinder. The cylinder is open at the bottom but closed at the top except for a small variable aperture; the rate of des
31、cent of the piston is adjusted by varying the size of the aperture. Alternatively, a motor drive may be used. 4.5 Means for providing the atmospheres, for conditioning and for testing the specimens. 5 Conditioning and testing atmospheres 5.1 Conditioning atmosphere. Specimens shall be conditioned in
32、 the standard atmosphere for testing textiles as defined in BS1051, i.e.a temperature of20 2 C and a relative humidity of652%r.h. 5.2 Testing atmosphere. The test shall be conducted in a substantially draught-free atmosphere having a temperature between15 C and30 C and a relative humidity between20%
33、 r.h. and60% r.h. 6 Health and safety of operators There is a risk associated with performing this test and suitable precautions should be taken. The atmosphere of the testing-room, which itself should be of adequate dimensions to avoid endangering the health of operators, should be cleared of smoke
34、 and fumes between tests by an extractor fan or other means of ventilation. It should be ensured that the desired atmosphere for testing specified in5.2 is restored. 3) A burner complying with this standard is available from James H. Heal b) whether the fabric passed or failed the test; c) the numbe
35、r of specimens tested and whether they were made up from small pieces; d) whether the specimens were tested as received or after a cleansing procedure from BS5651, and if so, a reference to the particular procedure employed; e) details of any deviation from the specified test procedure.BS4569:1983 B
36、SI 10-1999 Publications referred to BS1051, Glossary of terms relating to the conditioning, testing and mass determination of textiles. BS4250, Commercial butane and propane. BS5438, Methods of test for flammability of vertically oriented textile fabrics and fabric assemblies subjected to a small ig
37、niting flame 4) . BS5651, Cleansing and wetting procedures for use in the assessment of the effect of cleansing and wetting on the flammability of textile fabrics and fabric assemblies. 4) Referred to in the foreword only.BS 4569:1983 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInsti
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