1、BRITISH STANDARD BS 7141-1: 1991 Incorporating Amendment No. 1 Narrow fabrics Part 1: Specification for polyamide and polyolefin woven tapes and webbingsBS7141-1:1991 This British Standard, having been prepared under the direction of the Textiles and Clothing Standards Policy Committee, was publishe
2、d under the authority of the BoardofBSI and comes into effect on 31 January 1991 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference TCM/7 Draft for comment 87/41517 DC ISBN 0 580 18589 3 Committees responsible for this British Standard The preparation o
3、f this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/7, upon which the following bodies were represented: British Narrow Fabrics Association British Polyolefin Textiles Association Consumer Policy Committee of BSI Home Laund
4、ering Consultative Council Man-made Fibres Producers Committee Ministry of Defence SATRA Footwear Technology Centre Society of Dyers and Colourists Textile Institute Amendments issued since publication Amd. No. Date Comments 7730 July 1993 Indicated by a sideline in the marginBS7141-1:1991 BSI 07-19
5、99 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Sampling 2 4 Polyamide (nylon) webbings 2 5 Polyethylene (polyolefin) webbings 4 6 Marking 4 Appendix A Cross-references 10 Appendix B Supplementary information for MoD contracts 11 Appendix C Yarn c
6、onstructions 11 Appendix D Additional recommendations 13 Appendix E Method of test for determination of dimensional stability on heating in boiling water 13 Appendix F Method of test for extension 13 Figure 1 Needleloom selvedge system 3 Figure 2 Needleloom construction with spool type interlocking
7、4 Figure 3 Needleloom construction with the weft knitted with a locking thread 5 Figure 4 Needleloom construction with the weft secured by two knitted locking threads 7 Figure 5 Weave descriptions 9 Table 1 Fabric construction and properties for polyamide (nylon) webbings 6 Table 2 Minimum colour fa
8、stness ratings 8 Table 3 Fabric construction for polyethylene webbings 8 Table 4 Cross-references 10 Table 5 Yarn construction for standard patterns 12 Publication(s) referred to Inside back coverBS7141-1:1991 ii BSI 07-1999 Foreword This Part of BS7141 has been prepared under the direction of the T
9、extiles and Clothing Standards Policy Committee. It includes the woven tapes and webbings falling within the scope of this standard that were previously specified by the Ministry of Defence. The standard is intended for use by the public sector when purchasing woven tapes and webbings. Cross-referen
10、ces are given in Appendix A, and information specifically required by the Ministry of Defence and which was previously contained in Defence Standards is given in Appendix B. Appendix C gives yarn constructions used to manufacture to the standard patterns. Appendix D gives recommendations for product
11、 properties which are desirable but which, with present technology, cannot be specified objectively. Other Parts of BS7141 are as follows: Part 2: Specification for cotton webbings for personal load carrying purposes; Part 3: Specification for wool tapes; Part 4: Specification for woven elastic webb
12、ings containing natural rubber; Part 5: Specification for elastic fiat braids containing natural rubber; Part 6: Specification for laces for footwear and other purposes. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsi
13、ble for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. In particular attention is drawn to The Textile Products (Indications of Fibre Content) Regulations S.I 1986 No. 26. Summary of pages This document comprises a front cover
14、, an inside front cover, pages i and ii, pages1 to 14, 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 theinside front cover.BS7141-1:1991 BSI 07-1999 1 1 Scope This
15、Part of BS7141 specifies requirements for polyamide and polyolefin woven narrow fabrics (tapes and webbings) for use in the public sector and for general use. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this P
16、art of BS7141 the following definitions apply. 2.1 batch a definite quantity of some commodity produced under presumed uniform conditions 2.2 beading a feature of narrow fabrics in which one or both of the selvedges stand proud of the fabric, usually due to the edge lock threads being unduly thick N
17、OTEIt is usually classed as a defect, but sometimes, in special cases, is required as a feature of the fabric. 2.3 bias curvature exhibited by a narrow fabric in the horizontal plane when laid flat on a horizontal surface 2.4 narrow fabric any fabric made by interlacing fibres or yarns which (in the
18、 UK) does not exceed 450mm in width. In the USA and for the purposes of the Combined Nomenclature of the European Community for tariff purposes the upper limit of width is 300mm. A characteristic of a narrow fabric is that its edges are an essential feature 2.5 needleloom a shuttleless loom in which
19、 the weft is drawn from a stationary supply and introduced into the shed in the form of a double-pick by a weft insertion needle. The weft is retained at the opposite selvedge by the action of knitting, or by introduction of a locking thread from a separate supply 2.6 needleloom selvedge the selvedg
20、e opposite to that from which the weft is inserted in a narrow fabric needleloom NOTE 1Usually this selvedge is formed by knitting together successive double-pick weft loops, sometimes in combination with, or exclusively by means of a locking thread from a stationary supply. Alternatively, the locki
21、ng thread may be supplied from a small spool arranged to be passed through the extremities of the weft loops. NOTE 2A needleloom selvedge system is illustrated in Figure 1. 2.7 pick a single operation of the weft insertion mechanism in weaving. Thus the “double-pick” inserted by a needleloom is defi
22、ned as one pick 2.8 selvedge when used without qualification, a longitudinal edge of a fabric formed during weaving, with the weft not only turning at the edges but also passing continuously across the width of the fabric from edge to edge 2.9 shuttleloom a weaving machine that uses a shuttle to ins
23、ert the weft 2.10 stuffer thread a thread incorporated in a woven, knitted or braided structure, sometimes for the purpose of limiting its extension, sometimes to provide bulk and strength 2.11 spirality twisting of a narrow fabric around the vertical axis when held at one end in the vertical positi
24、on 2.12 tape a woven fabric, generally plain-weave, used in non-loadbearing applications and for the reinforcing of fabrics to resist wear and deformation 2.13 V draft in twill fabrics having alternate right and left twills forming a series of Vs, the number of V formations across the fabric width 2
25、.14 weave the pattern of interlacing of warp yarns and weft yarns in a woven fabric 2.15 webbing a woven narrow fabric, the prime function of which is loadbearing NOTEWebbing is generally of a coarse weave and often has multiple plies.BS7141-1:1991 2 BSI 07-1999 3 Sampling Samples shall not be taken
26、 from the first 3m of textile manufactured. Sampling shall be as follows. a) Woven fabrics, loomstate. 1) For fabrics woven from beams, take one sample from one piece per beam. NOTEThe quantity of fabric produced from one weavers beam or from a creel contains the same warp yarns throughout and is wo
27、ven in one particular form. As such, it constitutes a unique batch or unit of production, provided that weft yarn of substantially consistent quality has been used. If a fresh delivery of weft yarn of unproved quality is introduced during weaving the warp, a fresh batch has been created and further
28、samples for complete fabric tests become necessary. Manufacturers should maintain continuous quality control of weft yarn in respect of the relevant properties, e.g. type of fibre, linear density, strength. 2) For fabrics woven from creels, take one sample from one piece from each continuously woven
29、 length not exceeding 5000m. 3) If several narrow fabrics are woven simultaneously in the same loom, take one sample from each continuously woven length not exceeding 5000m. b) Woven fabrics, piece treated. 1) For woven fabrics already proved by test in loomstate, take one sample from one piece per
30、finishers batch per fabric type and manufacturer. 2) For woven fabrics not subject to test in loomstate, take one sample from one piece per weavers beam or each continuously woven length not exceeding 5000m per finishers batch. 3) If a finishers batch consists of further pieces from a weavers beam,
31、or from continuously woven lengths previously proved by test in the finished condition, take one sample from one piece from the finishers batch. In the event of dispute, samples shall be pre-conditioned for 4 h at a relative humidity not exceeding 10% and a temperature not greater than 50 C, and sub
32、sequently exposed to the standard temperate atmosphere for testing textiles, as defined in BS1051, for not less than 24 h and tested without removal from that atmosphere. 4 Polyamide (nylon) webbings 4.1 Yarn The webbings shall be manufactured from bright continuous filament polyamide 6.6 yarn. The
33、yarn shall not be sized. NOTEYarn construction details are given in Appendix C. 4.2 Construction and properties The fabrics shall be woven either in a shuttleloom, or in a needleloom manner. In the latter case the weaving used shall be one of the following: a) with spool type interlocking in the bod
34、y of the webbing as shown in Figure 2; b) the weft knitted with a locking thread as shown in Figure 3; c) the weft secured by two knitted locking threads as shown in Figure 4. NOTEThe knitted edge of a needleloom construction should be uniform and even. The weave description and fabric properties sh
35、all be as given in Table 1. 4.3 Dyeing Sulphur black dyes shall not be used. 4.4 Colour fastness The colour fastness of the yarn or finished fabric shall be as given in Table 2. NOTEIf the colour fastness of the yarn has been tested prior to manufacture, there is no need to carry out further tests a
36、fter manufacture. 4.5 Dimensional stability The dimensional stability of the fabric as supplied shall be such that, when tested in accordance with Appendix E, the shrinkage of the length shall not exceed 2%. 4.6 pH of aqueous extract The pH of the aqueous extract, when determined in accordance with
37、the hot water method described in BS3266, shall be not less than 5 and not more than 8. 4.7 Extension The minimum extension of pattern number 5447 fabric, when tested in accordance with Appendix F, shall be not less than 10%.BS7141-1:1991 BSI 07-1999 3 Figure 1 Needleloom selvedge systemBS7141-1:199
38、1 4 BSI 07-1999 5 Polyethylene (polyolefin) webbings The webbing shall be woven from manufactured yarn of round cross section of 0.375mm diameter spun from high density polyethylene (specific gravity 0.94 to 0.96) and shall be woven as given in Table 3 and shown in Figure 5. The webbing shall be as
39、given in Table 3. NOTEIf a white web is required the pigmentation should be such that there is no yellowing in use or in storage. 6 Marking Tapes and webbings shall be provided with a ticket or other means of marking carrying the following information: a) the number and date of this Part of BS7141,
40、i.e. BS7141-1:1991 1) ; b) the reference number of the product in accordance with Table 1; c) the name, trademark or other means of identification of the manufacturer. NOTEFor MoD contracts, additional information will include the contract number, the NATO stock number where appropriate (seeTable 4)
41、, and the pattern number (seeTable 1). Figure 2 Needleloom construction with spool type interlocking 1) Marking BS 7141-1:1991 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
42、 of the standard. 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.BS7141-1:1991 BSI 07-1999 5 Figure 3 Needleloom construction with the
43、weft knitted with a locking threadBS 7141-1:1991 6 BSI 07-1999 Table 1 Fabric construction and properties for polyamide (nylon) webbings Pattern number Width (determined in accordance with BS 1930) Number of warp threads in width Picks per 100mm ( 10) Weave details Nominal mass per unit length Nomin
44、al thickness a Minimum breaking strength b Main warp Selvedge Binder mm g/m mm N 9350 12 1 59 14 170 Two ply plain with binders weaving 2 2 alternately 10.0 1.20 3 500 9350 19 1 95 22 170 Two ply plain with binders weaving 2 2 alternately 17.0 1.20 4 500 9350 25 1 123 29 170 Two ply plain with binde
45、rs weaving 2 2 alternately 22.0 1.20 7 000 9351 25 1 167 20 120 Two ply plain with binders weaving 1 1 27.0 1.55 9 000 9352 50 2 264 80 2 2 twill double V 62.5 1.50 26 500 9353 100 3 350 170 2 2 twill double V 49.0 0.76 18 000 9354 32 2 184 11 46 130 Two ply plain with binders weaving 1 1: 54 mm sol
46、id, 22 mm buttonhole, 57 mm solid. Buttonhole offset 6 mm from the centre 48.0 2.03 4 500 9355 64 2 351 140 Two ply plain tubular 56.0 1.50 18 000 9438 25 1 80 210 2 2 twill 3.5 0.45 1 070 9439 19 1 94 210 2 2 V twill 3.9 0.45 1 400 9440 25 1 130 210 2 2 V twill 5.0 0.45 1 870 9442 12 1 50 140 2 2 V
47、 twill 7.0 1.00 2 250 9442 19 1 74 140 2 2 V twill 12.0 1.00 3 350 9442 25 1 100 140 2 2 V twill 15.0 1.00 4 500 9442 38 2 150 140 2 2 V twill 22.0 1.00 6 675 9442 44 2 176 140 2 2 V twill 26.0 1.00 7 790 9442 50 2 200 140 2 2 V twill 30.0 1.00 9 000 9442 55 2 224 140 2 2 V twill 33.0 1.00 10 000 94
48、42 64 2 250 140 2 2 V twill 39.0 1.00 11 125 9442 75 2 300 140 2 2 V twill 45.0 1.00 13 350 9442 100 3 400 140 2 2 V twill 60.0 1.00 18 000 9443 10 1 30 170 2 2 twill 5.0 0.90 1 350 9446 38 2 200 15 26 100 Two ply plain with binders weaving 2 2 alternately. Face and back warp yarns weaving 2 as 1. E
49、dge warp yarns single 90.0 3.00 26 500 9447 25 1 180 170 SeeFigure 5, weave A 8.0 800 9454 38 2 279 34 100 Two ply plain with binders weaving 1 1 40.0 1.40 13 500 9472 32 + 1, 2 122 40 stuffers 11 110 Two ply plain with beaded edges with binders weaving 2 2. Warp ends weaving 2 as 1. 6 mm beads with selvedge 76.0 NOTEWhen produced on a shutt
