1、BRITISH STANDARD AEROSPACE SERIES BS 4F 119:2002 145 g/m 2to 235 g/m 2nylon parachute fabric ICS 49.025.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 4F 119:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strateg
2、y Committee, was published under the authority of the Standards Policy and Strategy Committee on 22 May 2002 BSI 22 May 2002 First published February 1964 Second edition January 1982 Third edition September 1990 Fourth edition May 2002 The following BSI references relate to the work on this British
3、Standard: Committee reference ACE/54 Draft for comment 00/706577 DC ISBN 0 580 37919 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/54, Wide fabrics and coated fabrics for aerospace purposes, upon which the followi
4、ng bodies were represented: British Rubber Manufacturers Association Ltd. Ministry of Defence Society of British Aerospace Companies Ltd. Textile Finishers Association Amendments issued since publication Amd. No. Date CommentsBS 4F 119:2002 BSI 22 May 2002 i Contents Page Committees responsible Insi
5、de front cover Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 General requirements 1 5Y a r n 2 6 Manufacture 3 7 Finish 4 8 Construction and properties of finished fabric 4 9 Permeability 5 10 Water extractable matter 5 11 Identification 5 Annex A (info
6、rmative) Information to be supplied by the purchaser 6 Bibliography 7 Table 1 General requirements (given in BS F 100) 2 Table 2 Yarn construction 3 Table 3 Construction and properties of finished fabric 5 Table 4 Permeability requirements 5BS 4F 119:2002 ii BSI 22 May 2002 Foreword This British Sta
7、ndard, prepared by Technical Committee ACE/54, Wide fabrics and coated fabrics for aerospace purposes, is one of a series of specifications for textiles of a quality suitable for aerospace purposes, and is a revision of BS 3F 119:1990, which is withdrawn. This revision updates the standard, introduc
8、es intermingled yarns and deletes the imperial units for air permeability. Quality requirements as defined in the latest edition of BS F 100 are also included, as are details of information to be supplied by the purchaser. NOTE The latest revision of an aerospace series standard is indicated by a pr
9、efix number. Annex A is informative. A British 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. Summ
10、ary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 4F 119:2002 BSI 22 May 2002 1 1 Scope This British Standard specifies the requi
11、rements for a range of nylon fabrics, of nominal mass per unit area of 145 g/m 2to 235 g/m 2 for aerospace purposes, primarily for parachute canopies. NOTE The information to be supplied by the purchaser in the contract or order should be as listed in Annex A. 2 Normative references The following re
12、ferenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS F 100, Procedure for inspection and testing of textiles for ae
13、rospace purposes. BS EN ISO 2061:1996, Textiles Determination of twist in yarns Direct counting method. BS EN ISO 2062:1995, Textiles Yarns from packages Determination of single-end breaking force and elongation at break. 3 Terms and definitions For the purposes of this British Standard, the followi
14、ng term and definition applies. 3.1 intermingle impart cohesion to the filament bundle of a multifilament yarn by entwining the filaments 4 General requirements 4.1 In addition to the requirements specified in Clause 4 to Clause 11 of this standard, the requirements and tests of the latest edition o
15、f BS F 100 as specified in Table 1 shall apply. 4.2 The breaking force and elongation at break of the yarn (see 5.2) shall be determined in accordance with BS EN ISO 2062:1995, Method A, except that the number of packages to be tested shall be a minimum of five, and the number of tests required to p
16、roduce a package mean shall be five. 4.3 The yarn twist shall be determined in accordance with BS EN ISO 2061, except that the number of packages to be tested shall be a minimum of five, and the number of tests required to produce a package mean shall be five.BS 4F 119:2002 2 BSI 22 May 2002 Table 1
17、 General requirements (given in BS F 100) 5 Yarn 5.1 Type 5.1.1 Fabric 694-1 shall be woven from continuous-filament, round cross-section, high-tenacity nylon 6.6 yarn manufactured from semi-dull polymer. 5.1.2 Fabrics 694-4, 694-5 and 694-6 shall be woven from continuous-filament, round cross-secti
18、on, high-tenacity nylon 6.6 yarn manufactured from bright polymer. 5.2 Properties and construction 5.2.1 The yarn prior to twisting shall have the following properties: a) The yarn for fabric 694-1 shall have a nominal linear density of 67 dtex 1)and contain 20 filaments. It shall have a mean breaki
19、ng strength per package of not less than 250 cN and a mean elongation at break per package not exceeding 50 %. b) The yarn for fabrics 694-4, 694-5 and 694-6 shall have a nominal linear density of 235 dtex and contain 34 filaments. It shall have a mean breaking strength per package of not less than
20、1 500 cN and a mean elongation at break per package not exceeding 25 %. c) The yarn for fabrics 694-1 and 694-5 shall be folded. Section of BS F 100 Section title Requirements and tests in BS F 100 1 General All requirements 2 Quality requirements Requirements for the manufacture of wide fabrics Req
21、uirements for dyed textiles Requirements for dimensions and tolerances, general and wide fabrics Requirements for freedom from corrosive impurities (see also section 4) Requirements for freedom from faults in wide fabrics 3 Physical tests Test for the determination of the number of threads in woven
22、fabrics Test for the determination of mass of wide fabrics Tests for breaking strength and extension under force of wide fabrics Test for air permeability of parachute fabrics 4 Chemical tests Test for water extractable matter If required by section 2 test for pH value of aqueous extract test for wa
23、ter-soluble chloride test for water-soluble sulfate 1) 1t e x = 1 0 6 kg/m.BS 4F 119:2002 BSI 22 May 2002 3 5.2.2 Yarn construction shall comply with the values stated in Table 2. Table 2 Yarn construction 6 Manufacture The weaves shall be mock leno as detailed in Figure 1 for fabric 694-1 or Figure
24、 2 for fabrics 694-4, 694-5 and 694-6. Fabric designation Nominal yarn linear density Yarn twist Warp Weft Warp Weft dtex dtex turns/m turns/m 694-1 67 2 67 3 400 40 a 400 40 a 694-4 235 235 200 20 200 20 694-5 235 2 235 2 200 20 a 200 20 a 694-6 235 235 Intermingled Intermingled a These figures are
25、 for the folding twist. NOTE X denotes warp threads lifted. Figure 1 Weaving diagram for fabric 694-1 X X X X X X X X X X X X X X X X X X X X X X X XBS 4F 119:2002 4 BSI 22 May 2002 7 Finish 7.1 General The fabrics shall not be pressed or calendered and shall be supplied scoured and either: a) undye
26、d; or b) dyed (see 7.2). 7.2 Dyeing Where dyeing is required, the colour of the fabric shall be specified either by reference to a British Standard or otherwise by pattern. NOTE 1 An appropriate British Standard would be BS 381C:1996. NOTE 2 The requirement for dyed or undyed fabric should be stated
27、 by the purchaser in the contract or order (see Annex A). 8 Construction and properties of finished fabric 8.1 When tested in accordance with 4.1 the fabric in the finished state shall comply with the requirements of Table 3. 8.2 The minimum usable width of the finished fabric shall be 920 mm unless
28、 otherwise stated by the purchaser in the contract or order (see Annex A). NOTE The fabric may be woven in multiple widths with leno weave selvedges, and slit to yield finished fabric of the minimum usable width stipulated. NOTE X denotes warp threads lifted. Figure 2 Weaving diagram for fabrics 694
29、-4, 694-5 and 694-6BS 4F 119:2002 BSI 22 May 2002 5 Table 3 Construction and properties of finished fabric 9 Permeability When tested in accordance with 4.1, each piece of finished fabric shall have a mean permeability as shown in Table 4. NOTE It is most desirable that the mean permeability of the
30、fabric should be as near as possible to the relevant mean figure shown in Table 4, and that the variation between the individual readings should be as low as possible. Table 4 Permeability requirements 10 Water extractable matter When tested in accordance with 4.1, the amount of water extractable ma
31、tter in the finished fabric shall not exceed 1.0 % by mass. 11 Identification The fabric shall be identified for ordering purposes by the number and date of this British Standard, i.e. BS 4F 119:2002 2)together with the relevant designation given in Table 3 and, if required dyed, the colour. NOTE Th
32、is identification may be codified, e.g. fabric 694-4 required dyed olive drab may be identified as BS 4F 119:2002/694-4/BS 381C:1996 No 298. Designation Minimum number of threads per centimetre a Maximum mass per unit area Minimum average breaking strength g/m 2 N/50 mm Warp Weft Warp Weft 694-1 40.
33、0 28.5 145 1 050 1 050 694-4 33.0 31.0 185 2 010 2 010 694-5 20.5 20.5 235 2 450 2 450 694-6 29.0 27.0 160 1 660 1 660 a Calculated from the number of threads in a measured length of not less than 20 mm. Fabric Mean permeability a 694-1 5 350 600 694-4 5 350 600 694-5 5 350 600 694-6 2 750 300 a Mea
34、n permeability readings refer to l/(m 2 s), i.e. volume of air in litres passing through 1m 2of fabric in 1 s at 2.5 kN/m 2(25.4 cm water gauge). 2)Marking BS 4F 119:2002 on or in relation to a product represents a manufacturers declaration of conformity, i e. a claim by or on behalf of the manufact
35、urer that the product meets 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.BS 4F 119:2002 6 BSI 22 May 2002 Annex A (informative)
36、Information to be supplied by the purchaser The following information should be stated by the purchaser in the contract or order: a) the number of this British Standard, i.e. BS 4F 119; b) the fabric designation from Table 3; c) whether the fabric is required dyed or undyed (see Clause 7); d) the mi
37、nimum usable width required (see Clause 8).BS 4F 119:2002 BSI 22 May 2002 7 Bibliography Standards publication BS 381C, Specification for colours for identification, coding and special purposes.BS 4F 119:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the indep
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