1、BRITISH STANDARD BS 5808:1991 Incorporating Amendment No. 1 Specification for Underlays for textile floor coverings ICS 59.080.60 BS 5808:1991 This British Standard, having been prepared under the direction of the Textiles and Clothing Standards Policy Committee, was published under the authority of
2、 the Standards Board and comes into effect on 29 March 1991 BSI 9 March 2005 First published October 1979 Second edition March 1991 The following BSI references relate to the work on this British Standard: Committee reference: TCM/3 Draft for comment: 90/39161 DC ISBN 0 580 19366 7 Committees respon
3、sible 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/3, upon which the following bodies were represented: Association of Consulting Scientists British Carpet Manufacturers Ass
4、ociation Ltd. British Polyolefin Textiles Association British Retailers Association British Shops and Stores Association (BSSA) British Textile Technology Group Carpet Cleaners Association Confederation of British Wool Textiles Limited Consumer Policy Committee of BSI Contract Flooring Association F
5、ibre Bonded Carpet Manufacturers Association Institute of Trading Standards Administration International Wool Secretariat Man-made Fibres Producers Committee Power Loom Carpet Weavers and Textile Workers Association Royal Institute of British Architects South Western Regional Health Authority Wholes
6、ale Floorcovering Distributors Association. The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Rubber Manufacturers Association Needleloom Felt Manufacturers Association Amendments issued since publication Amd. No. Date Comments 1538
7、5 9 March 2005 See ForewordBS 5808:1991 BSI 9 March 2005 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Definitions 1 3 Sampling 1 4 Performance 2 5 Classification 3 6M a r k i n g 3 Annex A Method for determination of resistance to breaking and cracking 5 Annex
8、 B Calculation of work of compression 5 Figure 1 Classification of underlays (work of compression after dynamic loading versus compression after dynamic loading, in accordance with BS 4098) 4 Figure 2 Arrangements of folds in test specimen for resistance to breaking and cracking test 6 Figure 3 Loca
9、tion of metal plate on folded test specimen for resistance to breaking and cracking test 6 Table 1 Performance requirements for underlays 2 Table 2 Designation and description of intended use/application 3 Publication(s) referred to 7BS 5808:1991 ii BSI 9 March 2005 Foreword This British Standard ha
10、s been prepared under the direction of the Textiles and Clothing Standards Policy Committee. It is a revision of BS 5808:1979 which is withdrawn. This standard is complimented by BS EN 14499:2004 which also sets out minimum requirements for carpet underlays. As BS EN 14499:2004 does not include a cl
11、assification system for carpet underlays this standard is still current. The main differences in the minimum performance requirements are that BS EN 14499:2004 has requirements for short-term static loading, minimum thickness and appearance retention, whilst this standard has minimum requirements fo
12、r compression, which are not included in BS EN 14499:2004. In this revision, the factors which affect the use of an underlay in a given application have been rationalized. An attempt has been made to accommodate the technological requirements of underlays suitable for different end uses with the pra
13、ctical experience of underlay manufacturers, resulting in a system for classifying underlays by work of compression after dynamic loading and compression after dynamic loading. Flammability requirements have not been included. Methods for assessing the ignitability of materials such as a textile flo
14、or covering are under development, but their application to underlays has not been determined. However, some work has shown that the contribution of an underlay to the ignitability of a textile floor covering is likely to be small. This publication does not purport to include all the necessary provi
15、sions of a contract. Users are responsible for its 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, pages 1 to 7 and a back cover. The BSI
16、copyright notice displayed in this document indicates when the document was last issued.BS 5808:1991 BSI 9 March 2005 1 1 Scope This British Standard specifies performance requirements for fibrous, non-fibrous and combined underlays, together with their classification for five categories of intended
17、 use/application. NOTE 1 Advice on the installation of textile floor coverings, etc. is given in BS 5325. NOTE 2 The titles of the publications referred to in this standard are listed on page 7. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 Fibrous und
18、erlay 2.1.1 needlefelt underlay underlay made wholly of fibres entangled or matted together by needling of a fibre batt 2.1.2 impregnated fibrous underlay underlay made of fibrous material consolidated by impregnation with a binding agent NOTE A woven, nonwoven or film scrim may be included in a fib
19、rous underlay for support during manufacture. 2.2 Non-fibrous underlay 2.2.1 cellular rubber underlay underlay formed essentially of a vulcanized rubber foam, with or without a carrier or backing material bonded thereto 2.2.2 cellular plastics (polymeric) underlay underlay formed essentially of a po
20、lymeric foam, e.g. polyurethane, with or without a carrier or backing material bonded thereto 2.2.3 rubber crumb underlay underlay formed essentially of crumb vulcanized rubber with or without a carrier or backing material bonded thereto 2.3 combined underlay underlay composed of two or more layers
21、of any fibrous underlay combined with two or more layers of any non-fibrous underlay 3 Sampling Sampling shall be carried out in accordance with BS 4664. A full width sample 1 m in length in the machine production direction shall be taken. For non-fibrous underlays, a minimum period of 3 days shall
22、be allowed between manufacture and sampling.BS 5808:1991 2 BSI 9 March 2005 4 Performance All underlays shall comply with the performance requirements given in Table 1, when tested in accordance with the methods given therein. Table 1 Performance requirements for underlays Property Performance requi
23、rement Test method Breaking strength 40 N min. BS 2576 a Elongation 10 % max. extension for applied force of 40 N Loss in thickness: (a) static loading: recovery period 24 h Fibrous underlay 40 % max. BS 4939 Non-fibrous underlay 15 % max. Combined underlay 40 % max. (b) dynamic loading: after 1 000
24、 cycles Fibrous underlay 40 % max. BS 4052 Non-fibrous underlay 15 % max. Combined underlay 20 % max. Thickness deviation: BS 4051 b (a) mean original thickness from the nominal thickness Fibrous and combined underlay 15 % max. Non-fibrous underlay 12 % max. (b) difference between maximum and minimu
25、m original thicknesses Fibrous and combined underlay 4 mm max. Non-fibrous underlay 3 mm max. Compression after dynamic loading 2 mm min., 7 mm max. BS 4052 cand BS 4098 Work of compression after dynamic loading 50 J/m 2min., 200 J/m 2max. Retention of original work of compression 40 % min. Resistan
26、ce to breaking or cracking No cracks longer than 50 mm Annex A No cracks in any backing material a The requirement in BS 2576 to include at least 20 threads in the test specimum need not be met. b Thickness is measured in accordance with BS 4051 at 10 equally spaced intervals across the full width o
27、f an underlay using a presser foot of area between 700 mm 2and 1 000 mm 2 . c Compression and work of compression are determined in accordance with BS 4098 except that a presser foot of between 700 mm 2and 1 000 mm 2is used and loading of the specimen is only up to 100 kPa. Compression and work of c
28、ompression are calculated between 2 kPa and 100 kPa (see Annex B) before and after dynamic loading for 1 000 cycles in accordance with BS 4052. Certain carpet thickness gauges may require modification and the manufacturers advice should be sought.BS 5808:1991 BSI 9 March 2005 3 5 Classification All
29、underlays shall be classified as suitable for different intended use/applications in accordance with the performance levels shown in Figure 1 for work of compression after dynamic loading versus compression after dynamic loading. NOTE 1 The designations and the descriptions of intended use/applicati
30、on are described in Table 2. NOTE 2 Underlays should initially be specified to the appropriate classification for that particular application. An underlay classified L/U as being suitable for luxury use may be used in a heavy contract situation where extra comfort is required, such as in prestigious
31、 areas, but when looking at the alternative uses for any of the classes of underlays, advice should be sought from the manufacturer/supplier. Table 2 Designation and description of intended use/application 6 Marking Underlays shall be provided with a label or other means giving at least the followin
32、g information: a) the number and date of this British Standard, i.e. BS 5808:1991 1) ; b) the manufacturers or suppliers identification or trade mark; c) a description of the underlay, i.e. fibrous underlay, non-fibrous underlay or combined underlay, as appropriate; d) the classification in accordan
33、ce with Clause 5, e.g. LD/U. Designation Description of intended use/application LD/U Light domestic use, not suitable for stairs GD/U General domestic use L/U Luxury use, domestic/contract, where high energy absorption is desirable GC/U General contract use, suitable for normal foot and wheel traff
34、ic HC/U Heavy contract use, suitable for heavy foot and wheel traffic and castor chairs 1) Marking BS 5808:1991 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standar
35、d. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS 5808:1991 4 BSI 9 March 2005 NOTE For a description of each designation, see Table
36、 2. Figure 1 Classification of underlays (work of compression after dynamic loading versus compression after dynamic loading, in accordance with BS 4098)BS 5808:1991 BSI 9 March 2005 5 Annex A Method for determination of resistance to breaking and cracking NOTE The test is applicable to all types of
37、 underlay except those of wholly fibrous construction. A.1 Principle A rectangular piece of underlay is folded at each end. One end is placed under a weight-piece, whilst the other is folded without an added weight. After 1 h, the weight-piece is removed and each fold of the test specimen is visuall
38、y assessed for signs of cracking. A.2 Apparatus A.2.1 Rectangular rigid metal plate, of minimum dimensions 80 mm 40 mm. A.2.2 Weight-piece, such that the combined mass of the metal plate (A.2.1) and the weight piece is 2.5 kg. A.2.3 Single-sided adhesive carpet tape, 50 mm wide. A.3 Test specimen Th
39、e test specimen shall be of minimum dimensions 240 mm 120 mm. A.4 Procedure A.4.1 Fold the test specimen as shown in Figure 2, so that when folded the edges of the test specimen meet and the backing material, if any, is innermost. A.4.2 Tape (A.2.3) the edges of the test specimen together and then t
40、urn the test specimen over so that the edges where the folds meet are on the underside. A.4.3 Place the metal plate (A.2.1) on the folded test specimen as shown in Figure 3. A.4.4 Place the weight-piece (A.2.2) on top of the metal plate and leave for 1 h. A.4.5 Remove the weight-piece and metal plat
41、e and immediately examine the folded specimen for signs of cracking and breaking. A.5 Test report Report the number of cracks or breaks and their length and location relative to the position of the metal plate during loading. Annex B Calculation of work of compression Work of compression may be calc
42、ulated either directly by integration of the area under the loading curve between 2 kPa and 100 kPa by computer programme or by estimation of the area from discrete thickness measurements. If the second method is used, take thickness measurements at 2 kPa, 5 kPa, 10 kPa, 20 kPa, 50 kPa and 100 kPa p
43、ressure and calculate the work of compression (in J/m 2 ) using the following expression: where W c=( 1 . 5 t 2 4t 5+ 7.5t 10+2 0 t 20+ 40t 50 73t 100 ) t 2 is the thickness (in mm) at 2.0 kPa pressure; t 5 is the thickness (in mm) at 5.0 kPa pressure, etc.BS 5808:1991 6 BSI 9 March 2005 Figure 2 Ar
44、rangements of folds in test specimen for resistance to breaking and cracking test Figure 3 Location of metal plate on folded test specimen for resistance to breaking and cracking testBS 5808:1991 BSI 9 March 2005 7 Publication(s) referred to BS 2576, Method for determination of breaking strength and
45、 elongation (strip method) of woven fabrics. BS 4051, Method for determination of thickness of textile floor coverings. BS 4052, Method for determination of thickness loss of textile floor coverings under dynamic loading. BS 4098, Method for the determination of thickness, compression and recovery c
46、haracteristics of textile floor coverings. BS 4664, Methods for sampling and cutting specimens of textile floor coverings for physical tests. BS 4939, Method for determination of thickness loss of textile floor coverings after prolonged heavy static loading. BS 5325, Code of practice for installatio
47、n of textile floor coverings.BS 5808:1991 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by
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