1、BRITISH STANDARD BS7141-7: 1991 Narrow fabrics Part7: Specification for woven cotton tapes and webbingsBS7141-7:1991 This British Standard, having been prepared under the directionof the Textiles andClothing Standards PolicyCommittee, was publishedunder the authorityofthe Standards Boardand comes in
2、to effect on 28 June1991 BSI11-1999 The following BSI references relate to the work on this standard: Committee referenceTCM/7 Draft for comment87/41517DC ISBN 0 580 19592 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Textiles and Cl
3、othing Standards Policy Committee(TCM/-) to Technical CommitteeTCM/7, upon which the following bodies were represented: British Narrow Fabrics Association British Polyolefin Textiles Association British Textile Confederation Consumer Policy Committee of BSI Home Laundering Consultative Council Minis
4、try of Defence SATRA Footwear Technology Centre Society of Dyers and Colourists Textile Institute Amendments issued since publication Amd. No. Date CommentsBS7141-7:1991 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Construction 2 4 Sam
5、pling 4 5 Cotton tapes 5 6 Cotton webbing 5 7 Marking 5 Appendix A Cross-references 7 Appendix B Supplementary information for MoD contracts 7 Appendix C Yarn recommendations and construction 7 Appendix D Additional recommendations 7 Figure 1 Needleloom selvedge system 2 Figure 2 Needleloom construc
6、tion with spool type interlocking 3 Figure 3 Needleloom construction with the weft knitted with a locking thread 3 Figure 4 Needleloom construction with the weft secured by two knitted locking threads 4 Figure 5 Weave description 5 Table 1 Construction and performance of cotton tapes 5 Table 2 Const
7、ruction and performance of cotton webbing 6 Table 3 Cross-references 7 Table 4 Yarn construction for standard patterns 7 Publication(s) referred to Inside back coverBS7141-7:1991 ii BSI 11-1999 Foreword This Part of BS7141 has been prepared under the direction of the Textiles and Clothing Standards
8、Policy Committee. It is intended for use by the public sector when purchasing rigid woven cotton tapes and webbings. This Part of BS7141 augments and eventually may replace BS1625-6 and4830 and BS1664-8, to which it is related. Cross-references between the pattern numbers in this Part of BS7141 and
9、these related standards are given in Appendix A. Information specifically required by the Ministry of Defence (MoD) and which was previously contained in Defence Standards is given in Appendix B. Appendix C gives recommended linear densities as help and advice to manufacturers wishing to produce the
10、se fabrics. Appendix D gives recommendations for product properties which are desirable but which, with present technology, cannot be specified objectively. Other Parts of BS7141 are as follows: Part1: Specification for polyamide and polyolefin woven tapes and webbings; Part2: Specification for cott
11、on webbings for personal load carrying purposes; Part3: Specification for wool tapes; Part4: Specification for woven elastic webbings containing natural rubber; Part5: Specification for elastic flat braids containing natural rubber; Part6: Specification for laces for footwear and other purposes. A B
12、ritish 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. In particular attention is drawn to The Text
13、ile Products (Indications of Fibre Content) Regulations S.I.1986 No.26. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments inco
14、rporated. This will be indicated in the amendment table on the inside front cover.BS7141-7:1991 BSI 11-1999 1 1 Scope This Part of BS7141 specifies requirements for rigid woven narrow fabrics (tapes and webbings) made from cotton for use in the public sector and for general use. NOTEThe titles of th
15、e publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS7141 the following definitions apply. 2.1 batch a definite quantity of some commodity produced under conditions which are presumed uniform 2.2 beading a feature of narrow
16、 fabrics in which one or both of the selvedges stand proud of the fabric, usually due to the edge lock threads being unduly thick NOTEIt 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 hor
17、izontal plane when laid flat on a horizontal surface 2.4 mass per unit area (narrow fabric) a characteristic of a narrow fabric which may be calculated according to the following formula: 2.5 narrow fabric any fabric made by interlacing fibres or yarns which (in the UK) does not exceed450mm in width
18、. In the USA and for the purposes of the Combined Nomenclature of the European Community for tariff purposes the upper limit of width is300mm. A characteristic of a narrow fabric is that its edges are an essential feature 2.6 needleloom a shuttleless loom in which the weft is drawn from a stationary
19、 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 the introduction of a locking thread from a separate supply 2.7 needleloom selvedge the selvedge opposite to that from which th
20、e 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 locking thread may be supplied from
21、 a small spool arranged to be passed through the extremities of the weft loops. NOTE 2A needleloom selvedge system is illustrated in Figure 1. 2.8 pick a single operation of the weft insertion mechanism in weaving. Thus the “double-pick” inserted by a needleloom is defined as one pick 2.9 selvedge w
22、hen 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 2.10 shuttleloom a weaving machine that uses a shuttle to insert the weft 2.11 spirality t
23、wisting of a narrow fabric around the vertical axis when held on one end in the vertical position 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 rig
24、ht and left twills forming a series of Vs, the number of V formations across the width of the narrow fabric 2.14 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
25、a coarse weave and often has multiple plies. mass per unit area (in g/m 2 ) mass (in g per 100 m)10 width (in mm) - =BS7141-7:1991 2 BSI 11-1999 3 Construction 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 follo
26、wing: a) with spool type interlocking in the body 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
27、. Figure 1 Needleloom selvedge systemBS7141-7:1991 BSI 11-1999 3 Figure 2 Needleloom construction with spool type interlocking Figure 3 Needleloom construction with the weft knitted with a locking threadBS7141-7:1991 4 BSI 11-1999 4 Sampling Samples shall not be taken from the first3m of textile man
28、ufactured. 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 woven in one particular form. As su
29、ch, 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 samples for complete fabric tests
30、 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 length not exceeding5000m. 3) If
31、several narrow fabrics are woven simultaneously in the same loom, take one sample from each continuously woven length not exceeding5000m. b) Woven fabrics, piece treated. 1) For woven fabrics already proved by test in loomstate, take one sample from one piece per finishers batch per fabric type and
32、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 exceeding5000m per finishers batch. Figure 4 Needleloom construction with the weft secured by two knitted locking threadsBS7141-7:1991 BSI 11-199
33、9 5 3) If a finishers batch consists of further pieces from a weavers beam, 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 preconditioned for4h at a relative hu
34、midity not exceeding10%, and a temperature not greater than50 C, and subsequently exposed to the standard temperate atmosphere for testing textiles, as defined in BS1051, for not less than24h and tested without removal from that atmosphere. 5 Cotton tapes Cotton tapes shall be manufactured from100%
35、cotton in a plain weave. The construction and performance of the tape shall be as given in Table 1. 6 Cotton webbing Cotton webbing shall be manufactured from100% cotton in a2 2 twillV pattern weave, except for webbingCW2 which shall be woven in a plan as shown in Figure 5. NOTE. TheV pattern2 2 twi
36、llis woven to provide an integral number of half Vs across the width of the fabric. The width of theV is as near to12.5mm as permitted by the width of webbing required. The construction and performance of webbing shall be as given in Table 2. 7 Marking Tapes and webbings shall be provided with a tic
37、ket or other means of marking carrying the following information: a) the number and date of this Part of BS7141, i.e.BS7141-7:1991 1) ; b) the reference number of the product in accordance with Table 1 or Table 2; c) the name, trademark or other means of identification of the manufacturer. NOTEFor M
38、oD contracts, additional information will include the contract number. Table 1 Construction and performance of cotton tapes 1) Marking BS7141-7:1991 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 m
39、eets the requirements 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. Reference number Minimum mean ends percm (determ
40、ined in accordance with BS2862) Minimum mean picks percm (determined in accordance with BS2862) Minimum mass per unit area (determined in accordance with BS2471) Minimum breaking strength percm width (determined in accordance with BS2576) CT1 CT2 CT3 21 28 28 8 12 14 g/m 2 120 155 220 N 75 120 180 F
41、igure 5 Weave descriptionBS7141-7:1991 6 BSI 11-1999 Table 2 Construction and performance of cotton webbing Reference number Minimum mean ends percm (determined in accordance with BS2862) Minimum mean picks percm (determined in accordance with BS2862) Minimum mass per unit area (determined in accord
42、ance with BS2471) Minimum breaking strength percm width (determined in accordance with BS2576) CW1 CW2 CW3 CW4 CW5 23 22 35 29 28 15 15 15 12 12 g/m 2 350 220 185 580 390 N 180 110 155 450 360BS7141-7:1991 BSI 11-1999 7 Appendix A Cross-references Cross-references between the numbers specified in th
43、is Part of BS7141 and the reference numbers in related standards are listed in Table 3. Table 3 Cross-references Appendix B Supplementary information for MoD contracts B.1 Standard pattern A standard pattern, obtainable from the authority named in the tender or contract, provides criteria for any pr
44、operties not specified in this standard. B.2 Non-compliance In the event of non-compliance with the specified requirements, any resampling is at the discretion of the Quality Assurance Directorate. B.3 Inspection The scale of inspection and testing is at the discretion of the Quality Assurance Direc
45、torate named in the contract. B.4 Packaging The tape is to be delivered rolled. Packaging (preservation, identification and packing) is to be in accordance with the contract. B.5 Delivered lengths, joins and marking of joins The roll length will vary according to the webbing mass per unit length, bu
46、t no roll is to be less than50m or of such a size as to be inconvenient for the user. Rolls of not more than two lengths will be accepted provided that the shorter length is not less than10m. The position of the cut or join is to be indicated by a marker in the selvedge and a note on the piece ticke
47、t. The number of pieces containing joins is to be indicated on the consignment documents. NOTEFor marking seenote to clause7. Appendix C Yarn recommendations and construction To assist manufacturers, yarns recommended for use in the products are given in Table 4. Table 4 Yarn construction for standa
48、rd patterns NOTE 1Values for twist are given in turns per metre. NOTE 2The tolerances on twist are 20%. Appendix D Additional recommendations D.1 Spirality If the yarn twists in the narrow fabric structure are unbalanced, the fabric can exhibit spirality. Narrow fabrics should not exhibit this defec
49、t to any significant degree. D.2 Bias In some specialized end uses, bias is a required feature but in most general purpose end uses it is not. In the latter case, the maximum deviation from a straight line when the fabric is laid on a horizontal surface should not exceed30mm in1m. D.3 Visible faults The fabric should be free from all visible defects such as stains, holes, slubs and unevenness of colour or texture. D.4 Beading Unless required
