1、BRITISH STANDARD AEROSPACE SERIES BS 4F 123: 1996 Specification for Woven nylon narrow fabrics for aerospace purposes (nominally235 dtex yarns)BS4F123:1996 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards
2、 Board and comes intoeffect on 15 March 1996 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/21 Draft for comment 95/700888 DC ISBN 0 580 24930 1 Committees responsible for this British Standard The preparation of this British Standard was entrus
3、ted 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 Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBS4F123:1996
4、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 General requirements 1 5 Yarn 1 6 Construction and properties 1 7 Finish 3 8 Dimensional stability 3 9 Identificat
5、ion 3 Table 1 General requirements (given in BS F 100) 1 Table 2 Construction and properties 2 Table 3 Colour codings 3 List of references Inside back coverBS4F123:1996 ii BSI 11-1999 Foreword This British Standard has been prepared by Technical Committee ACE/21 and is one of a series for textiles o
6、f a quality suitable for aerospace purposes. It is a revision of BS 3F 123:1990 which is withdrawn.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 does not purport to include all the necessar
7、y 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 inside front cover, pages i and ii, pages1 to
8、 4, 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.BS4F123:1996 BSI 11-1999 1 1 Scope This British Standard specifies the requirements for wov
9、en nylon narrow fabrics for aerospace purposes, in which the basic yarns are nominally235dtex. NOTEThe latest edition of an Aerospace Series standard is indicated by a prefix number. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications.
10、 These normative references are made at the appropriate 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 this standard only when incorpo
11、rated in the reference by amendment or revision. For undated 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 following information to be supplied by the purchaser shall be fully docume
12、nted. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made and verified: a) the finish (see 7.1) b) if required dyed, the colour (see 7.2). 4 General requirements In additio
13、n to the requirements specified in clauses5 to 9, those requirements and tests of thelatest edition of BS F 100 which are listed in Table 1, shall apply. 5 Yarn 5.1 The narrow fabrics shall be manufactured from bright continuous filament nylon 6.6 yarn having a nominal tenacity of 70cN/tex and nomin
14、al extension at break of15%. 5.2 Yarns for warp and weft shall be constructed from singles of nominally 235 dtex, having (34 2) filaments. 5.3 The number of plies of yarn and turns per metre of twist shall be in accordance with Table 2. 5.4 Yarns shall not be sized. 6 Construction and properties 6.1
15、 The fabric in the finished state shall conform to the requirements given in Table 2. 6.2 The webbings shall be woven on a shuttle loom. Shuttleless constructions shall not be permitted. 6.3 For the fabrics listed in Table 3, some of the main warp ends shall be coloured. These threads shall be centr
16、ally disposed, and of the same composition and structure as the other main warp threads, and shall be included in the total number given in Table 2. Table 1 General requirements (given in BS F 100) Section of BSF 100 Section title Requirements and tests 1 General All requirements 2 Quality requireme
17、nts Requirements for manufacture of narrow fabrics Requirements for dyed textiles Requirements for dimensions and tolerances Requirements for freedom from corrosive impurities (seesection 4 of BS F 100) Requirements for freedom from faults of woven narrow fabrics 3 Physical tests Test for determinat
18、ion 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 4 Chemical tests If required by section 2 of BS F 100: Test for conductivity of aqueous
19、extract Test for pH value of aqueous extract Test for water soluble chloride Test for water soluble sulphateBS 4F 123:1996 2 BSI 11-1999 Table 2 Construction and properties Fabric designation Width Ends in width Picks per 100mm Yarn structure including nominal twist a Weave Maximum mass per unit len
20、gth Nominal thickness b Minimum breaking strength Wrap Weft No. of plies Nominal twist No. of plies Nominal twist mm tpm tpm g/m mm N 613 51 300 185 8 2 150 Z 1 200 Z 2/2 twill 20.3 0.66 7350 602 25 212 142 8 2 150 Z 1 200 Z 2/2 W twill 13.1 0.74 4450 603 51 394 189 8 1 200 Z 1 200 Z 2/2 twill 14.5
21、0.43 4450 8291D 38 196 212 8 1 200 Z 1 200 Z 2/2 W twill 8.4 0.45 2800 107 25 190 181 8 1 200 Z 1 200 Z 2/2 W twill 7.3 0.45 2200 8291C 25 130 212 8 1 200 Z 1 200 Z 2/2 W twill 5.6 0.45 1870 173 25 91 158 8 2 150 Z 1 200 Z Plain 6.6 0.43 1775 276 25 142 189 8 1 200 Z 1 200 Z 2/2 W twill 5.3 0.41 147
22、5 8291B 19 94 212 8 1 200 Z 1 200 Z 2/2 W twill 4.4 0.45 1400 404 13 100 122 8 1 200 Z 1 200 Z Plain 3.3 0.38 1100 8291A 25 80 212 8 1 200 Z 1 200 Z 2/2 W twill 3.9 0.45 1070 a Tolerance on twist 20%. b As measured in accordance with BS 2544 under a pressure of 21 kPa.BS4F123:1996 BSI 11-1999 3 7 Fi
23、nish 7.1 General The fabric shall be either: a) scoured; or b) scoured and dyed. The required finish shall be specified in the contract or order. 7.2 Dyeing If dyeing is required, either the fabric or the yarns from which it is to be constructed shall be dyed. The colour shall be identified wherever
24、 possible by reference to an official standard, e.g. BS 381C, or otherwise by pattern, and shall be documented in accordance with clause 3. 8 Dimensional stability The dimensional stability of the fabric, as supplied, shall be such that when immersed in boiling water, the lengthways shrinkage shall
25、not exceed 2%. 9 Identification The fabric shall be identified for ordering purposes by the number of this British Standard together with the relevant designation given in Table 2 and, if required dyed, the colour. NOTEThis identification may be codified. For example, fabric no. 603, required dyed N
26、ato Green, may be identified as British Standard 4F 123/603/BS 381 C/285. Table 3 Colour codings Fabric designation Colour code 613 6 black ends 602 2 red ends 603 2 red ends NOTEThese coloured threads are intended as an inspection aid to the user to differentiate these fabrics from others of simila
27、r appearance.4 blankBS4F123:1996 BSI 11-1999 List of references Normative references BSI publications BRITISH STANDARDS INSTITUTION, London BS 5F 100:1991, Procedure for inspection and testing of textiles for aerospace purposes. BS 381C:1988, Specification for colours for identification, coding and
28、special purposes. BS 2544:1987, Methods for determination of thickness of textile materials. BS 4F 123: 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 i
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