1、BRITISH STANDARD BS 4881:1993 Specification for Polypropylene film cords, lines and twinesBS4881:1993 This British Standard, having been prepared under the directionof the Textiles and Clothing Standards Policy Committee, was published underthe authority of the Standards Board and comes intoeffect o
2、n 15February1993 BSI 07-1999 First publishedJanuary1973 Second editionAugust1983 Third editionFebruary1993 The following BSI references relate to the work on this standard: Committee reference TCM/45 Draft for comment91/36359 DC ISBN 0 580 21285 8 Committees responsible for this British Standard The
3、 preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/45, upon which the following bodies were represented: Associated Offices Technical Committee Association of Metropolitan Authorities British Tugowners Associ
4、ation Chief and Assistant Chief Fire Officers Association Cordage Manufacturers Institute Department of Trade and Industry (National Engineering Laboratory) Federation of Wire Rope Manufacturers of Great Britain GMC County Fire Service Health and Safety Executive Institution of Fire Engineers Made-U
5、p Textiles Association Ministry of Defence National Caving Association National Federation of Master Steeplejacks and Lightning Conductor Engineers Scottish Office (Agriculture and Fisheries Department) Textile Institute The following bodies were also represented in the drafting of the standard, thr
6、ough subcommittees and panels: Linen Sewing Thread Manufacturers Association Scottish Net Manufacturers Association Amendments issued since publication Amd. No. Date CommentsBS4881:1993 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Defin
7、itions 1 4 Materials 1 5 Construction 2 6 Make-up 2 7 Sampling and conditioning 2 8 Testing 2 9 Marking 3 Annex A (informative) Supplementary information for the supply of cords, lines and twines to the MOD 4 Table 1 Single ply polypropylene film twines 1 Table 2 Three ply and laid polypropylene fil
8、m cords and lines 2 Table 3 Polypropylene film twines 2 List of references Inside back coverBS4881:1993 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Textiles and Clothing Standards Policy Committee, and supersedes BS4881:1981, which is withdrawn. It give
9、s requirements for a range of polypropylene film cords, lines and twines for both Government and commercial purposes, and covers cords formerly included in Specification DEF-STAN40-10 1, which is to be withdrawn. Additional information for cords, lines and twines for MOD is given in Annex A. Assesse
10、d capability. Users of this British Standard are advised to consider the desirability of quality system assessment and registration against the appropriate Part of BS5750 by a third party certification body. A British Standard does not purport to include all the necessary provisions of a contract. U
11、sers 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 to 4, an inside back cover and
12、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.BS4881:1993 BSI 07-1999 1 1 Scope This British Standard specifies requirements for fibrillated film cords, lines and twi
13、nes, excluding agricultural and fishing net twines, manufactured from polypropylene film, and gives methods of test for verification of these requirements. NOTENatural fibre cords, lines and twines are covered in BS6125, and agricultural twines in BS3543. 2 References 2.1 Normative references This B
14、ritish Standard incorporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publicatio
15、ns apply to this British Standard only when incorporated in it by updating or revision. 2.2 Informative references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the i
16、nside back cover, but reference should be made to the latest editions. 3 Definitions For the purposes of this British Standard, the definitions given in BS3724:1991 apply, together with the following. 3.1 fibrillateable film a polypropylene polymer or copolymer film into which such a degree of molec
17、ular orientation has been induced that it will split longitudinally when twisted 3.2 fibrillateable film tape a narrow strip of fibrillateable film 3.3 fibrillated film twine one or more fibrillateable film tapes split longitudinally by twisting to form a cord, line or twine 3.4 batch a definite qua
18、ntity of some commodity produced under presumed uniform conditions 3.5 package the unit of packaging in which cords, lines or twines are supplied NOTEThe packagemay be a ball or spool. 4 Materials 4.1 Cords, lines and twines shall be manufactured from fibrillateable film tape of polypropylene in acc
19、ordance with BS5139:1991. Virgin materials shall be used. NOTEA quantity of suitable additives, not exceeding10%, may be heat-combined in the melt to improve the mechanical properties of the finished twine for specific applications. 4.2 If stabilization is considered necessary in the use to which th
20、e twine is to be put, twine produced in accordance withTable 1shall contain inhibitor such that the twine has a percentage retained strength of not less than0.7times the percentage strength of the control, when tested in accordance with clause21 of BS5053:1985. NOTEPolypropylene is degraded by ultra
21、violet radiation, when exposed to sunlight, resulting in a progressive loss of mechanical performance. The vulnerability to degradation exists to a greater degree in cords, lines and twines made from an uninhibited polymer. Table 1 Single ply polypropylene film twines 4.3 For cords, lines and twines
22、 conforming to Table 2 andTable 3, the polymer formulation shall include ultraviolet inhibition additives. Runnage ( 5 %) Minimum breaking strength m/kg tex N 2000 1400 1000 700 450 350 280 170 130 500 715 1000 1430 2250 2860 3570 5880 7690 167 245 392 490 765 981 1226 2010 2648 NOTETex is the inter
23、national textile unit of linear density corresponding to the mass (in grams) per kilometre.BS4881:1993 2 BSI 07-1999 Table 2 Three ply and laid polypropylene film cords and lines Table 3 Polypropylene film twines 5 Construction 5.1 Single ply polypropylene film twine shall conform toTable 1. NOTEThe
24、 direction of twist is at the discretion of the manufacturer, and the twine should be uniformly twisted and free from defect. 5.2 Three ply polypropylene film lines and cords shall conform toTable 2 and be of Z twist, with the exception of the8mm diameter line, which shall be composed of eight plait
25、s. Each ply, or plait, shall consist of an equal number of yarns. 5.3 Twines of minimum two ply shall conform toTable 3 and be of Z twist, and suitable for hand-sewing. Each ply shall be twisted before forming into the finished twine. 5.4 Finished cords, lines and twines shall be continuous througho
26、ut their length. NOTEThey should be flexible, well laid and free from defects likely to affect performance. 6 Make-up 6.1 Each package shall run continuously throughout its length. NOTEEach package should be neatly and securely made up. 6.2 When twines conforming toTable 1 are made up into balls, su
27、ch balls shall not be waisted unless specifically ordered so. 6.3 Cords and lines conforming toTable 2 shall be made up in220m coils or cheeses. 6.4 Twines conforming toTable 3 shall be made up in either250g or500g balls, cheeses, cops or spools. NOTEIt is recommended that the purchaser is requested
28、 to specify the make-up at the time of ordering. 7 Sampling and conditioning 7.1 Sampling The batch shall be constituted of the same type and dimensions of cord, line or twine. The number and length of the samples to be taken from each batch shall be in accordance with clause3 of BS5053:1985. NOTESa
29、mpling should be representative as possible of the batch. 7.2 Conditioning Conditioning of samples shall be in accordance with clause4 of BS5053:1985 except that samples shall be conditioned for24h. 8 Testing Runnage shall be determined in accordance with clause5 of BS5053:1985. Minimum breaking str
30、ength shall be determined in accordance with section three of BS5053:1985. For minimum breaking strength,10specimens per sample shall be tested. If the mean of the breaking forces of the10specimens is less than the appropriate minimum specified inTable 1 to Table 3, three further samples shall be ta
31、ken from the same batch and five specimens shall be tested from each of these samples. If the mean of the breaking forces for any of the three sets of five specimens is less than the appropriate minimum specified inTable 1 toTable 3, the whole batch shall be rejected. Nominal diameter Construction R
32、unnage ( 10%) Minimum breaking strength mm m/kg N 1.2 2.0 3.0 4.5 5.5 7.0 8.0 8.0 Laid Laid Laid Laid Laid Laid Laid Plaited 960 400 230 110 85 55 41 38 440 835 1225 2060 3335 5000 7550 6865 Description Runnage ( 10%) Minimum breaking strength m/kg N Upholsterers twine 1900 175 Roping twine 950 345
33、Packing twine 550 685 Marline 270 1370BS4881:1993 BSI 07-1999 3 9 Marking Cords, lines and twines shall be provided with a ticket or other means of marking attached to each container and carrying the following information: a) the number and date of this British Standard, i.e. BS4881:1993 1) ; b) the
34、 description of the cord, line or twine including its length; c) the name, trademark or other means of identification of the manufacturer. NOTEFor MOD contracts, additional information will be required (seeAnnex A). 1) Marking BS4881:1993 on or in relation to a product represents a manufacturers dec
35、laration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be
36、 desirable.BS4881:1993 4 BSI 07-1999 Annex A (informative) Supplementary information for the supply of cords, lines and twines to the MOD A.1 Colour When required, the melt for cords, lines and twines conforming toTable 2 andTable 3 is to be coloured to the stipulated shade. A.2 Marking Each parcel
37、is to have a label, securely attached, on which the following is clearly, legibly, and indelibly marked: a) the name, trademark or other means of identification of the manufacturer; b) the description of the cord, line or twine; c) the length of the twine, or the mass of the spool; d) the contract a
38、nd batch numbers; e) the NATO stock number; f) the year of manufacture; g) the number and date of this standard, i.e.BS4881:1993. A.3 Packing Packing is to be in accordance with the instructions issued with the contract or, if not defined in the contract, undertaken in a manner such that delivery is
39、 made with the product in a serviceable condition.BS4881:1993 BSI 07-1999 List of references Normative references BSI standards publications BRITISH STANDARDS INSTITUTION, London BS 3724:1991, Glossary of terms relating to fibre ropes and cordage. BS 5053:1985, Methods of test for cordage and webbin
40、g slings and for fibre cores for wire ropes. BS 5139:1991, Method of specifying general purpose polypropylene and propylene copolymer materials for moulding and extrusion. Informative references BSI standards publications BRITISH STANDARDS INSTITUTION, London BS 3543:1991, Specification for agricult
41、ural baler twines made from sisal and polyolefin for automatic pick-up balers and similar machines. BS 5750, Quality systems. BS 5750-0, Principal concepts and applications. BS 5750-0.1:1987, Guide to selection and use. BS 5750-0.2:1987, Guide to quality management and quality system elements. BS 57
42、50-1:1987, Specification for design/development, production, installation and servicing. BS 5750-2:1987, Specification for production and installation. BS 5750-3:1987, Specification for final inspection and test. BS 5750-4:1990, Guide to the use of BS5750-1 “Specification for design/development, pro
43、duction, installation and servicing”, Part2 “Specification for production and installation” and Part 3 “Specification for final inspection and test”. BS 5750-8:1991, Guide to quality management and quality systems elements for services. BS 5750-13:1991, Guide to the application of BS5750-1 to the de
44、velopment, supply and maintenance of software. BS 6125:1981, Specification for natural fibre cords, lines and twines. Other references 1 Defence Standard 40-10, Polypropylene lines and twines.BS 4881:1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent
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