1、BRITISH STANDARD BS 5127:1974 Specification for Polyolefin webbing for divans and bed bases UDC 677.755:677.494.742:684.428:645.423BS5127:1974 This British Standard, having been approved by the Man-madeFibres Industry Standards Committee, was published under the authority ofthe Executive Board on 31
2、October 1974 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference RNT/8 Draft for comment 73/70186 DC ISBN 0 580 08277 6 Co-operating organizations The Man-made Fibres Industry Standards Committee, under whose supervision this British Standard was prepare
3、d, consists of representatives from the following Government departments and scientific and industrial organizations: Apparel and Fashion Industries Association British Man-made Fibres Federation* British Mantle Manufacturers Association British Polyolefin Textiles Association* British Textile Emplo
4、yers Association British Throwsters Association Clothing Manufacturers Federation Consumer Standards Advisory Committee of BSI Cotton Silk and Man-made Fibres Research Association* Department of Health and Social Security Department of Trade and Industry Institute of Trading Standards Administration
5、 Leek and District Manufacturers and Dyers Association Man-made Fibres Producers Committee Ministry of Defence* Narrow Fabrics Federation Society of Dyers and Colourists Textile Converters Association Warp Knitters Association The Government department and scientific and industrial organizations mar
6、ked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Jute Spinners and Manufacturers British Plastics Federation Jute Industry Standards Committee Jute Sack and Bag Manu
7、facturers Association National Bedding Federation Amendments issued since publication Amd. No. Date of issue CommentsBS5127:1974 BSI 10-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Materials 1 5 Manufacture 1 6 Performance
8、requirements 1 7 Sampling and conditioning 1 Appendix A Method for the determination of breaking force 2 Appendix B Method for the determination of joint strength 2 Appendix C Method for the determination of extensibility 2 Figure 1 Clamp for holding joint strength specimens 4 Figure 2 Method of sta
9、pling for joint strength tests 4 Publications referred to Inside back coverBS5127:1974 ii BSI 10-1999 Foreword The need for this British Standard has arisen from the increasing use of polyolefin materials in products which were previously made from jute. Webbing,used in the construction of divans an
10、d bed bases (see BS1877 “Domestic bedding” Part 9 “Wood-framed divans and bed bases”) is now frequently made from woven polyolefin material and this standard specifies certain requirements for this webbing. Certification. Attention is drawn to the certification facilities described on the inside bac
11、k cover of this standard. 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 British Standard does not of itself confer immunity from legal obligations. Summary of page
12、s This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, 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.BS512
13、7:1974 BSI 10-1999 1 1 Scope This British Standard specifies certain manufacturing and performance requirements for woven polyolefin webbing used in the construction of divans and bed bases. The methods of test used for testing the performance requirements are also included. 2 References The titles
14、of the British Standards referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 breaking force the maximum force applied to a specimen of the webbing in stretching it to rupture 3.2 joint strength
15、 the maximum force that the webbing will sustain when one end is stapled to a block of wood 3.3 extensibility the increase in length of a specimen of the webbing after prolonged application of a constant force. It is expressed as a percentage of the initial length of the specimen 3.4 tape yarn flat
16、yarn having a high ratio of width to thickness composed of an olefin polymer 4 Materials The webbing shall be woven from yarns made from olefin polymers complying with either of the following standards. a) Polypropylene. Material classified as in BS5139. b) Polyethylene. Material in accordance with
17、BS3412. NOTEAttention is drawn to the fact that polypropylene, and to a lesser extent polyethylene, are liable to actinic degradation, for example when exposed to strong sunlight. When the possibility of actinic degradation is a significant factor, the degree of stabilization should be agreed betwee
18、n the purchaser and the supplier. 5 Manufacture 5.1 Tape yarns. The tape yarns shall be uniform and have a linear density in the range50 tex to150tex. 5.2 Webbing. The webbing shall be uniformly woven, free from any significant defect, and not less than50mm wide. Edges shall have non-fray characteri
19、stics. 5.3 Marking and packaging. Marking and packaging shall be in accordance with arrangements to be made between the purchaser and the manufacturer. 6 Performance requirements 6.1 Breaking force. When tested as described inAppendix A the mean value of the breaking force of ten specimens shall be
20、not less than1000N, and the minimum value of the individual specimens shall be not less than900N. Should one or more specimens fail at a lower value, the whole of the consignment of material under test shall be deemed not to comply with the requirements of this British Standard. 6.2 Joint strength.
21、When tested as described inAppendix B the mean value of the joint strength of ten specimens shall be not less than700N, and the minimum value of the individual specimens shall be not less than600N. Should one or more specimens fail at a lower value, the whole of the consignment of material under tes
22、t shall be deemed not to comply with the requirements of this British Standard. 6.3 Extensibility. When tested as described inAppendix C the mean value of the one-day extensibility of five specimens shall be not greater than5.5%. If the value is greater than5.5%, the whole of the consignment of mate
23、rial under test shall be deemed not to comply with the requirements of this British Standard. When tested as described inAppendix C, the difference between the mean value of the ten-day extensibility and the one-day value shall be not more than1.5%. If the ten-day value exceeds the one-day value by
24、more than1.5%, the whole of the consignment under test shall be deemed not to comply with the requirements of this British Standard. 7 Sampling and conditioning 7.1 Sampling. Samples for testing shall be selected from different parts of the consignment so that they are adequately representative of t
25、he bulk. 7.2 Conditioning. Freely expose the selected samples to a temperature of20 2 C at ambient humidity for24h prior to testing. Where it is not possible to carry out tests in this atmosphere, carry out the test immediately after removal from the conditioning atmosphere. NOTEIn cases of dispute
26、the samples shall be conditioned in, and the tests carried out in, the standard atmosphere for testing textiles as defined in BS1051, namely, a relative humidity of65 2% and a temperature of20 C.BS5127:1974 2 BSI 10-1999 Appendix A Method for the determination of breaking force A.1 Principle A lengt
27、h of webbing is extended until it breaks, by a suitable mechanical device which indicates the force required to break the webbing. A.2 Apparatus The apparatus shall comprise a constant-rate-of-extension tensile testing machine which complies with the requirements of grade A of BS1610. A.3 Test speci
28、mens Ten full width specimens shall be tested, each taken from a different package in the sample. The specimen length shall be greater than200mm by an amount equal to the length required to ensure adequate clamping. A.4 Procedure Follow the procedure laid down in BS2576 with the following exceptions
29、. a) The atmosphere for conditioning and testing specified in7.2 shall be used. b) The rate of separation of the pulling jaws shall be200 10mm/min. c) At the beginning of the test, the gauge length (i.e. the distance between the jaws of the machine) shall be200 10mm. d) Ensure that the specimen is f
30、irmly gripped; the slippery nature of this material may make it necessary to use lined or serrated clamps. e) If any specimen slips in either of the clamps or breaks in or at either of the clamps at an abnormally low force, the results of that test shall be discarded and a fresh test made. A.5 Resul
31、ts Calculate the arithmetic mean of the ten individual results. Report both the mean and the individual results in newtons. Appendix B Method for the determination of joint strength B.1 Principle One end of a length of webbing is stapled to a block of wood and attached to the fixed clamp of a tensil
32、e testing machine and the force required to cause the joint to fail is measured. B.2 Apparatus The apparatus shall comprise the following. a) Tensile testing machine as specified inA.2. b) Block of wood approximately60mm 25mm 25mm. c) Staples manufactured from wire of diameter0.610mm to0.813mm. d) S
33、pecial clamp for tensile testing machine to hold wooden block in such a way that tension can be applied along the length of the webbing and in the plane of the stapled joint (Figure 1 shows a simple form of the arrangement). B.3 Test specimens Ten full width specimens shall be tested, each taken fro
34、m a different package in the sample. The specimen length shall be greater than200mm by an amount equal to the length required to ensure adequate clamping. B.4 Procedure B.4.1 Staple the specimen of webbing across its full width to the block of wood using seven staples through the single thickness of
35、 the webbing and seven staples through the double thickness of the webbing (seeFigure 2). B.4.2 Fix the wooden block in the special clamp seeB.2 d). Attach the special clamp to the testing machine and the free end of the webbing to the pulling jaw in the usual way. Set the zero on the force measurin
36、g device with the special clamp and wooden block in position. B.4.3 Operate the machine at a rate of separation of the jaws of2005mm. B.4.4 Discard the results of a test and make a fresh test if a) the specimen slips in the normal clamp or breaks in or at the normal clamp at an abnormally low load,
37、or b) the joint fails by the staples pulling out of the wood, before the webbing itself fails, at a load lower than that specified in6.2. B.5 Results Calculate the arithmetic mean of the ten individual results. Report both the mean and the individual results in newtons. Appendix C Method for the det
38、ermination of extensibility C.1 Principle A known weight is attached to a length of webbing suspended vertically and the extension produced after1 day and 10 days is measured. C.2 Apparatus The apparatus shall comprise the following. a) Clamps to enable the specimen to be suspended from a fixed poin
39、t and to attach weights to the specimen.BS5127:1974 BSI 10-1999 3 b) Weights to enable a total weight equivalent to the application of a mass of10kg to be suspended from the webbing. C.3 Test specimens Five full width specimens shall be tested each taken from a different package of the sample. The s
40、pecimen length shall be greater than one metre by an amount equal to the length required to ensure adequate clamping. C.4 Procedure C.4.1 Carry out the test at a temperature of20 C. C.4.2 Draw two lines on the specimen at right angles to the warp direction and1 000 1mm apart. When marking these line
41、s lay the webbing on a smooth flat surface and apply no greater tension than is necessary to make the webbing lie flat and straight. C.4.3 Suspend the webbing vertically from a rigidly fixed clamp. C.4.4 Fix a second clamp to the free end of the specimen and attach weights to this clamp so that the
42、total weight suspended by the webbing is equivalent to the application of a mass of10kg. C.4.5 After the tension has been applied to the specimen for1day measure, to the nearest mm, thedistance between the transverse lines marked on it (L mm). Carry out this measurement with the specimen in situ and
43、 still under tension. C.4.6 After the tension has been applied to the specimen for10days, again measure, to the nearest mm, the distance between the transverse lines marked on it (M mm). Again carry out this measurement with the specimen in situ and still under tension. C.5 Results Calculate the val
44、ues of the 1 day and 10 day extensibility for each specimen from the following formula: Calculate the mean value of the 1 day and 10 day extensibility of the five specimens. Calculate also the difference between the mean 10 day and 1 day extensibilities under load. 1 day extensibility L 1 000 10 - %
45、 = 10 day extensibility M 1 000 10 - % =BS5127:1974 4 BSI 10-1999 Figure 1 Clamp for holding joint strength specimens Figure 2 Method of stapling for joint strength testsBS5127:1974 BSI 10-1999 Publications referred to This standard makes reference to the following British Standards: BS 1051, Glossa
46、ry of terms relating to the conditioning and testing of textiles. BS 1610, Methods for the load verification of testing machines. BS 2576, Methods for the determination of breaking load and extension of strips of woven textile fabric. BS 3412, Polythene materials for moulding and extrusion. BS 5139,
47、 Classification for polypropylene plastics materials for moulding and extrusion. BSI Certification Trade Mark The Kitemark The Kitemark is the registered certification trade mark of the British Standards Institution. A licence to use the Kitemark on or in relation to a product will be granted to any
48、 manufacturer or producer who demonstrates that he can and will be able consistently to make that product to a specified British Standard. His capability of doing so is initially assessed by inspection of his production process, quality control organization and test facilities, and by independent te
49、sting of a sample of the product against all the criteria of the relevant standard. The licensee is required to accept, and to operate in accordance with, a BSI scheme of supervision and control which identifies the tests to be carried out during manufacture and on the completed product, and specifies the frequency of such testing. BSI carries out unannounced inspection visits to the manufacturers works and audit testing of the product, and may withdraw the licence for any failure of the m
