1、BRITISH STANDARD AEROSPACE SERIES BS 4F 124: 1996 Specification for Woven nylon 6.6 narrow fabrics for aerospace purposes (nominally940 dtex yarns)BS4F124:1996 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Stand
2、ards Board and comes intoeffect on 15March1996 BSI 11-1999 First published as BSF124 April1968 Second edition1985 Third edition December1991 Fourth edition March1996 The following BSI references relate to the work on this standard: Committee reference ACE/21 Draft for comment 95/700889 DC ISBN 0 580
3、 25325 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/21, Narrow woven fabrics for aerospace purposes, upon which the following bodies were represented: British Narrow Fabrics Association Ministry of Defence Societ
4、y of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date CommentsBS4F124:1996 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Information and requirements to be agreed and to be documented 1 4 Ge
5、neral requirements 1 5 Yarn 1 6 Construction 1 7 Finish 5 8 Properties 5 9 Identification 5 Annex A (normative) Method for the determination of water absorption 6 Figure 1 Shuttleless construction with spool type interlocking 4 Figure 2 Weave diagram for webbing No. 244 4 Table 1 General requirement
6、s (given in BS F100) 1 Table 2 Yarn construction 2 Table 3 Fabric construction and properties 3 Table 4 Polyurethane treated fabric properties (treated material) 5 List of references Inside back coverBS4F124:1996 ii BSI 11-1999 Foreword This British Standard has been prepared by Technical Committee
7、ACE/21 and is one of a series for textiles of a quality suitable for aerospace purposes. It is a revision of BS3F124:1991 which is withdrawn. This edition brings the standard up to date and introduces values for maximum masses for the aerospace textiles covered by the standard. A British Standard do
8、es 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 pages This document comprises a front cover, an ins
9、ide front cover, pagesi andii, pages1 to6, 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.BS4F124:1996 BSI 11-1999 1 1 Scope This British Stan
10、dard specifies requirements for woven nylon6.6 narrow fabrics for aerospace purposes, in which the basic yarns are nominally940dtex. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the approp
11、riate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to BSF124 only when incorporated in the reference by amendment or revision. For unda
12、ted references, the latest edition of the cited publication applies, together with any amendments. 3 Information and requirements to be agreed and to be documented The purchaser shall state in his contract or order: a) the number of this British Standard (i.e.BS4F124); b) fabric designation (as quot
13、ed in the relevant tables of this standard); c) the type of weave required (see6.2); d) the condition required (see7.1); e) if required dyed, the colour (see7.2.1). 4 General requirements In addition to the requirements specified in clauses5 to9, those requirements and tests of thelatest edition of
14、BSF100 which are listed inTable 1 shall apply. 5 Yarn 5.1 The fabric shall be manufactured from bright, continuous filament, nylon6.6 yarn. 5.2 The nominal construction of the yarn shall be in accordance withTable 2. 5.3 The tolerance on the twist shall be 20%. The tolerance on the number of filamen
15、ts shall be5%. 5.4 The direction of first-line twist in all fabric designations shall be either all S or all Z. The second-line twist shall be in the opposite direction. There shall not be different first-line twist directions in the fabric. 6 Construction 6.1 The fabric in the finished state shall
16、conform to the requirements given inTable 3. 6.2 The fabric shall be woven on one of the following: a) a shuttle loom; b) a shuttleless loom where this is in accordance with the appropriate yarn designation as given inTable 2 (see also6.3). NOTEThe type of weaving required should be specified in the
17、 purchasers contract or order (seeclause3), but for supply against this British Standard the two types of weaving are considered to be technically equivalent and either may be supplied. Table 1 General requirements (given in BS F100) Section Title Requirements and tests 1 General All requirements 2
18、Quality requirements Requirements for manufacture of narrow fabrics Requirements for dyed textiles except those related to fabric intended for coating Requirements for dimensions and tolerances Requirements for freedom from corrosive impurities (seesection 4 of BSF100) Requirements for freedom from
19、faults of woven narrow fabrics 3 Physical tests Test for determination of number of threads per unit length in fabrics Test for the determination of the mass of fabrics Test for breaking strength and extension under force Test for dimensional stability on heating: boiling water Test for flexibility
20、of fabric 4 Chemical tests If required by section 2 of BS F 100: Test for conductivity of aqueous extract Test for pH value of aqueous extract Test for water soluble chloride Test for water soluble sulfateBS 4F 124:1996 2 BSI 11-1999 Table 2 Yarn construction Fabric designation Warp yarn Weft yarn S
21、pool locking thread for shuttleless construction as shown inFigure 1 Main Selvedge Binder Conventional Shuttleless No. 48S 940f140 2Z100 940f140 2Z100 235f34 2Z150 940f140 2Z100 940f140Z100 940f140Z100 No. 161S 940f140 6Z100 940f140 Z400 2 S350 235f34 2Z150 940f140 2Z100 940f140Z100 940f140Z100 No.
22、229S 940f140 2Z100 940f140 2Z100 235f34 2Z150 940f140 2Z100 940f140Z100 940f140Z100 No. 627S 940f140 2Z100 940f140Z100 235f34 2Z150 alt. 470 f 68 Z 150 940f140 2Z100 940f140Z100 940f140Z100 No. 176 940f140 6Z100 940f140 2Z100 940f140 2Z100 No. 244 940f140 2Z100 940f140 2Z100 940f140 2Z100 No. 8293 9
23、40f140Z100 940f140Z100 No. 8294 940f140Z100 940f140Z100 NOTEThe tolerance on twist (designated by S or Z for convenience) is 20%. The units for twist are turns per metre. The tolerance on the number of filaments shall be 5%.BS 4F 124:1996 BSI 11-1999 3 Table 3 Fabric construction and properties Fabr
24、ic designation Width Ends in width Picks per 100mm Weave Maximum mass per unit length Nominal thickness a Minimum breaking strength Main warp Selvedge Binder mm g/m mm N No. 229S 44 124 3 15 2 32 83 4 Two-ply plain with two binder shafts weaving opposite two up, two down 108.0 b 3.1 44 500 b No. 48S
25、 44 116 3 23 30 98 4 Two-ply plain with two binder shafts weaving opposite two up, two down 99.7 3.1 35 500 No. 627S 44 303 16 39 110 4 Two-ply 2/1 W twill with two pick float on outside faces and binders weaving 1 1; the selvedge shall be woven in accordance withFigure 2 84.2 3.1 33 500 No. 244 44
26、271 11 130 8 SeeFigure 2 79.2 2.5 29 000 No. 161S 44 75 8 20 110 8 Two-ply plain with binders weaving 1 1 65.0 b 2.0 22 000 b No. 176 44 56 4 102 4 2/2 V Twill 53.0 1.8 18 000 No. 8293/100 100 400 138 8 2/2 V Twill 67.2 1.0 17 800 No. 8293/75 75 300 138 8 2/2 V Twill 50.4 1.0 13 350 No. 8293/64 64 2
27、50 138 8 2/2 V Twill 43.7 1.0 11 125 No. 8293/57 57 224 138 8 2/2 V Twill 37.0 1.0 10 000 No. 8293/50 50 200 138 8 2/2 V Twill 33.6 1.0 8 900 No. 8293/44 44 176 138 8 2/2 V Twill 29.1 1.0 7 790 No. 8293/38 38 150 138 8 2/2 V Twill 24.6 1.0 6 675 No. 8293/25 25 100 138 8 2/2 V Twill 16.8 1.0 4 450 No
28、. 8293/19 19 74 138 8 2/2 V Twill 13.4 1.0 3 350 No. 8293/12.5 12.5 50 138 8 2/2 V Twill 7.8 1.0 2 225 No. 8294 10 30 168 8 2/2 Twill 5.6 0.9 1 350 a Measured in accordance with BS2544 under a pressure of21kPa. b For polyurethane treated fabrics refer toTable 4.BS4F124:1996 4 BSI 11-1999 6.3 Shuttle
29、less construction shall not be used unlessthe appropriate yarn designation as given inTable 2 is required. If such a yarn is required, the shuttleless construction shall be with spool type interlocking in the body of the fabric. (SeeFigure 1 for guidance.) 6.4 Binding yarns where specified shall be
30、equally spaced across the width of the webbing. 6.5 Selvedge yarns where specified shall be divided evenly between the edges. Where there is an uneven number of selvedge yarns the difference between the number in each edge shall not exceed one. Figure 1 Shuttleless construction with spool type inter
31、locking Figure 2 Weave diagram for webbing No. 244BS4F124:1996 BSI 11-1999 5 7 Finish 7.1 Condition of material The fabric shall be supplied in one of the following conditions: a) scoured; b) scoured and dyed; c) scoured and polyurethane treated (see7.3); d) scoured, dyed and polyurethane treated (s
32、ee7.3). NOTE 1This British Standard does not permit the supply of loomstate fabric. NOTE 2The condition required should be stated in the purchasers contract or order (seeclause3). 7.2 Dyeing 7.2.1 Where dyeing is required, the colour shall be specified by reference to a British Standard, e.g.BS381C,
33、 or otherwise by pattern. NOTEThe colour required should be stated in the purchasers contract or order (seeclause3). 7.2.2 Fabric 627S shall be dyed using a continuous pad/steam technique. 7.3 Polyurethane treatment 7.3.1 Polyurethane treatment shall only be applied to fabrics 161S and 229S. 7.3.2 T
34、hese fabrics shall be impregnated with an aqueous emulsion of polyurethane. NOTEAs an alternative to dyeing for7.1 d), a pigment paste can be incorporated in the aqueous emulsion which readily disperses to give the fabric surface an evenly distributed shade of the colour specified. 8 Properties 8.1
35、Fabrics in the finished state shall conform to8.2 andTable 3. Polyurethane finished fabrics shall conform toTable 4. 8.2 The dimensional stability of heat set fabrics as supplied shall be such that the lengthways shrinkage shall not exceed2% in boiling water. 9 Identification The fabric shall be ide
36、ntified for ordering purposesby the number of this British Standard, i.e. BS4F124 1) , together with the appropriate designation and, if required dyed, the colour. NOTEThis identification may be codified. For example, fabric designation 229S, required dyed NATO green, may be identified as BS4F124/22
37、9S/BS381C/285. Table 4 Polyurethane treated fabric properties (treated material) 1) Marking BS 4F 124 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 standard. The accu
38、racy 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. Fabric designation Flexibility: maximum bending length Maximum water absorption a Minimum break
39、ing strength Maximum mass per unit length mm % N g/m No. 229S/PU No. 161S/PU 165 200 33 23 35 500 22 000 115 70 a SeeAnnex A.BS4F124:1996 6 BSI 11-1999 Annex A (normative) Method for the determination of water absorption A.1 Take a test specimen approximately230mm long, heat seal it at both ends and
40、 weigh. A.2 Immerse the specimen in distilled or deionized water at a depth of approximately200mm. After30min remove the specimen, shake vigorously to remove the surplus water and reweigh. A.3 Report the percentage increase in mass as a percentage of the mass before immersion.BS4F124:1996 BSI 11-199
41、9 List of references Normative references BSI publications BRITISH STANDARDS INSTITUTION, London BS 5F 100:1991, Procedures for inspection and testing of textiles for aerospace purposes. BS 381C:1988, Specification for colours for identification, coding and special purposes. BS 2544:1987, Methods fo
42、r determination of thickness of textile materials. BS 4F 124: 1996 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. I
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