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1、BRITISH STANDARD AEROSPACE SERIES BS 6F 55:1991 (Superseding BS 5F 55:1982) Specification for 345 g/m2 and 415 g/m2 cotton canvas fabrics suitable for aerospace purposes Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 This Brit
2、ish Standard, having been prepared under the direction of the Aerospace Standards Policy Committee (ACE/-), was published under the authority of the Board of BSI and comes into effect on 31 January 1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference
3、 ACE/54 Draft for comment 89/70471 DC ISBN 0 580 19243 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/54, upon which the following bodies were represented: Britis
4、h Fabric Association British Rubber Manufacturers Association British Textile Employers Association Man-made Fibres Producers Committee Ministry of Defence Society of British Aerospace Companies Limited Society of Dyers and Colourists Amendments issued since publication Amd. No.Date of issueComments
5、 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 BSI 11-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2General requirements1 3Yarn type1 4Manufacture1 5Finish2 6Construction and properties of f
6、inished fabric2 7Identification2 Appendix A Information to be supplied by the purchaser3 Table 1 General requirements (given in BS F 100)1 Table 2 Properties of the grey yarn1 Table 3 Properties of the loomstate fabric2 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun
7、, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 ii BSI 11-1999 Foreword This British Standard, prepared under the direction of the Aerospace Standards Policy Committee, is one of a series for textiles of a quality suitable for aerospace purposes and is a revision o
8、f BS 5F 55:1982 which is withdrawn. It differs from the previous edition primarily in that provision for the supply of fabrics treated with mineral khaki has been deleted. Quality requirements as defined in the latest edition of BS F 100 are also included, as are details of information to be supplie
9、d by the purchaser. WARNING NOTES 1) This standard calls for the use of substances and/or test procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and in no way absolves either the supplier or the user from statutory obligations r
10、elating to health and safety at any stage of manufacture or use. 2) This standard specifies pentachlorophenyl laurate (PCPL) as the only approved rotproofing treatment for aerospace fabrics. Alternative treatments are under development, and this standard will be updated to delete PCPL as soon as an
11、approved alternative treatment for aerospace fabrics is available. 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 immunit
12、y from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 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 am
13、endment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 BSI 11-19991 1 Scope This British Standard specifies the requirements for cotton canvas fabrics of nominal loomstate mass per unit area of
14、 345 g/m2 and 415 g/m2 for aerospace purposes, primarily for heavy duty parachute packs. NOTE 1The information to be supplied by the purchaser in the contract or order is listed in Appendix A. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. NOTE
15、 3The latest revision of an Aerospace Series standard is indicated by a prefix number. 2 General requirements In addition to the requirements specified in clauses 3 to 7, the following sections and clauses of the latest edition of BS F 100 shall apply (see Table 1). 3 Yarn type 3.1 The yarn shall be
16、 unsized cotton yarn free from trash and seed coat. 3.2 The grey yarn shall comply with Table 2. 4 Manufacture 4.1 The weave shall be plain. 4.2 The properties of the loomstate fabrics shall comply with Table 3. Table 1 General requirements (given in BS F 100) Table 2 Properties of the grey yarn Sec
17、tionTitleRequirements and test 1GeneralAll requirements 2Quality requirements Requirements for the manufacture of wide fabrics Requirements for dyed textiles Requirements for dimensions and tolerances: general and wide fabrics Requirements for freedom from corrosive impuritiesa Requirements for free
18、dom from defects 3Physical testsTest for the determination of mass of wide fabric Tests for breaking strength and extension under load of wide fabrics Dimensional changes by cold water immersion: wide fabrics Test for water repellency 4Chemical testsIf required by section 2: test for freedom from co
19、rrosive impurities test for pH value of aqueous extract test for water soluble chloride test for water soluble sulphate a Not applicable to loomstate fabric. Fabric designation Nominal linear density for single yarn PliesFolding twist Twist direction WarpWeftWarpWeftWarpWeft dtexdtexturns/mturns/m N
20、o. 55 No. 448 370 445 370 445 3 2 3 2 475 475 475 475 S S Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 2 BSI 11-1999 Table 3 Properties of the loomstate fabric 5 Finish 5.1 General The fabrics shall be supplied either: a) sc
21、oured, dyed (see 5.2) and rotproofed (see 5.3); or b) scoured, dyed (see 5.2), rotproofed (see 5.3) and treated with a water repellent (see 5.4). 5.2 Dyeing The colour shall be specified either by reference to a British Standard, e.g. BS 381C, or otherwise by pattern. NOTEThe colour required should
22、be stated in the contract or order (see Appendix A). 5.3 Rotproofing 5.3.1 The fabrics shall be treated with pentachlorophenyl laurate (PCPL) in accordance with BS 2087-1, normal process. 5.3.2 No alternative process shall be used. 5.4 Water repellent treatment 5.4.1 When water repellency is require
23、d, the fabric shall be rendered permanently water repellent by a process which complies with 6.3. NOTEThe requirement for water repellent treatment should be stated in the contract or order (see Appendix A). 5.4.2 Cuprammonium proofing shall not be used. 6 Construction and properties of finished fab
24、ric NOTEThe minimum usable width of the finished fabric should be as stated by the purchaser in the contract or order (see Appendix A) but a minimum usable width of 900 mm is usually supplied. 6.1 Tests When tested in accordance with clause 2, the fabric in the finished state shall comply with 6.2,
25、6.3 and 6.4. 6.2 Breaking strength The minimum average breaking strength in the warp or weft directions shall be not less than the following: a) fabric designation No. 55:1050 N/50 mm; b) fabric designation No. 448:880 N/50 mm. 6.3 Water repellency Where water repellency is required, the fabric shal
26、l be rendered water repellent such that the mean absorption shall not exceed 25 % and the penetration shall be nil, i.e. no individual figure shall exceed nil. 6.4 Dimensional changes The maximum change in dimensions of the finished fabric after immersion in water at 20 2 C shall not exceed 2 % in e
27、ither warp or weft direction. 7 Identification The fabric shall be identified for ordering purposes by the number of this British Standard, i.e. BS 6F 55:19901), together with the relevant designation given in Table 2 and, if required, the colour and water repellency treatment. NOTEThis identificati
28、on may be codified. For example, fabric No. 448 required dyed to BS 381C olive drab and treated with a water repellent, may be identified as BS 6F 55/448/BS 381C No. 298/WR. Fabric designation Minimum number of threads per centimetrea Mass per unit area Minimum average breaking strength WarpWeftWarp
29、Weft g/m2N/50 mmN/50 mm No. 55 No. 448 17.0 17.0 15.5 18.0 415 15 345 15 1 100 900 1 250 1 000 a Calculated from the number of threads in a measured length of not less than 2 cm. 1) Marking BS 6F 55:1991 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a clai
30、m by or on behalf of the manufacturer 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, which may also be des
31、irable. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 BSI 11-19993 Appendix A 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
32、this British Standard, i.e. BS 6F 55; b) the fabric designation, selected from Table 2; c) the colour (see 5.2); d) the water repellent treatment, if required (see 5.4.1); e) the width of the cloth if other than 900 mm (see clause 6). Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 G
33、MT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 BSI 11-1999 Publications referred to BS F 100, Procedure for inspection and testing of textiles. BS 381C, Specification for colou
34、rs for identification, coding and special purposes. BS 2087, Preservative treatments for textiles. BS 2087-1, Specification for treatments. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:29:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6F 55:1991 BSI 389 Chiswick High Road London W4 4A
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42、 Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary de
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