1、BRITISH STANDARD AEROSPACE SERIES BS6F55:1991 (Superseding BS5F55:1982) Specification for 345g/m 2and415g/m 2cotton canvas fabrics suitable for aerospace purposesBS6F55:1991 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee (ACE/-), was publis
2、hed under theauthority of the Board of BSIand comes into effect on 31January1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/54 Draft for comment 89/70471 DC ISBN 0 580 19243 1 Committees responsible for this British Standard The preparation
3、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: British Fabric Association British Rubber Manufacturers Association British Textile Employers Association Man-made Fibres Produc
4、ers Committee Ministry of Defence Society of British Aerospace Companies Limited Society of Dyers and Colourists Amendments issued since publication Amd. No. Date of issue CommentsBS6F55:1991 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 General requir
5、ements 1 3 Yarn type 1 4 Manufacture 1 5 Finish 2 6 Construction and properties of finished fabric 2 7 Identification 2 Appendix A Information to be supplied by the purchaser 3 Table 1 General requirements (given in BSF100) 1 Table 2 Properties of the grey yarn 1 Table 3 Properties of the loomstate
6、fabric 2 Publications referred to Inside back coverBS6F55:1991 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 of BS5F55:1982 which
7、is withdrawn.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 BSF100 are also included, as are details of information to be supplied by the purchaser. WARN
8、ING 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 relating to health and sa
9、fety 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 approved alternative tre
10、atment 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 immunity from legal obligations
11、. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to4, 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 insid
12、e front cover.BS6F55:1991 BSI 11-1999 1 1 Scope This British Standard specifies the requirements for cotton canvas fabrics of nominal loomstate mass per unit area of345g/m 2and415g/m 2for aerospace purposes, primarily for heavy duty parachute packs. NOTE 1The information to be supplied by the purcha
13、ser 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 3The latest revision of an Aerospace Series standard is indicated by a prefix number. 2 General requirements In addition to the requiremen
14、ts specified in clauses3 to7, the following sections and clauses ofthe latest edition of BSF100 shall apply (seeTable 1). 3 Yarn type 3.1 The yarn shall be 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
15、The properties of the loomstate fabrics shall comply with Table 3. Table 1 General requirements (given in BSF100) Table 2 Properties of the grey yarn Section Title Requirements and test 1 General All requirements 2 Quality requirements Requirements for the manufacture of wide fabrics Requirements fo
16、r dyed textiles Requirements for dimensions and tolerances: general and wide fabrics Requirements for freedom from corrosive impurities a Requirements for freedom from defects 3 Physical tests Test for the determination of mass of wide fabric Tests for breaking strength and extension under load of w
17、ide fabrics Dimensional changes by cold water immersion: wide fabrics Test for water repellency 4 Chemical tests If required by section 2: test for freedom from corrosive impurities test for pH value of aqueous extract test for water soluble chloride test for water soluble sulphate a Not applicable
18、to loomstate fabric. Fabric designation Nominal linear density for single yarn Plies Folding twist Twist direction Warp Weft Warp Weft Warp Weft dtex dtex turns/m turns/m No.55 No.448 370 445 370 445 3 2 3 2 475 475 475 475 S SBS6F55:1991 2 BSI 11-1999 Table 3 Properties of the loomstate fabric 5 Fi
19、nish 5.1 General The fabrics shall be supplied either: a) scoured, dyed (see5.2) and rotproofed (see5.3); or b) scoured, dyed (see5.2), rotproofed (see5.3) and treated with a water repellent (see5.4). 5.2 Dyeing The colour shall be specified either by reference to a British Standard, e.g.BS381C, or
20、otherwise by pattern. NOTEThe colour required should be stated in the contract or order (seeAppendix A). 5.3 Rotproofing 5.3.1 The fabrics shall be treated with pentachlorophenyl laurate (PCPL) in accordance with BS2087-1, normal process. 5.3.2 No alternative process shall be used. 5.4 Water repelle
21、nt treatment 5.4.1 When water repellency is required, the fabric shall be rendered permanently water repellent by a process which complies with6.3. NOTEThe requirement for water repellent treatment should be stated in the contract or order (seeAppendix A). 5.4.2 Cuprammonium proofing shall not be us
22、ed. 6 Construction and properties of finished fabric NOTEThe minimum usable width of the finished fabric should be as stated by the purchaser in the contract or order (seeAppendix A) but a minimum usable width of900mm is usually supplied. 6.1 Tests When tested in accordance with clause2, the fabric
23、in the finished state shall comply with6.2, 6.3 and6.4. 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.55:1050N/50mm; b) fabric designation No.448:880 N/50mm. 6.3 Water repellency Where water r
24、epellency is required, the fabric shall be rendered water repellent such that the mean absorption shall not exceed25% 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
25、at20 2 C shall not exceed2% in either warp or weft direction. 7 Identification The fabric shall be identified for ordering purposes by the number of this British Standard, i.e.BS6F55:1990 1) , together with the relevant designation given in Table 2 and, if required, the colour and water repellency t
26、reatment. NOTEThis identification may be codified. For example, fabric No.448 required dyed to BS381C olive drab and treated with a water repellent, may be identified as BS6F55/448/BS381C No.298/WR. Fabric designation Minimum number of threads per centimetre a Mass per unit area Minimum average brea
27、king strength Warp Weft Warp Weft g/m 2 N/50mm N/50mm No.55 No.448 17.0 17.0 15.5 18.0 415 15 345 15 1100 900 1250 1000 a Calculated from the number of threads in a measured length of not less than2cm. 1) Marking BS6F55:1991 on or in relation to a product represents a manufacturers declaration of co
28、nformity, i.e.a claim 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, w
29、hich may also be desirable.BS6F55:1991 BSI 11-1999 3 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 this British Standard, i.e.BS6F55; b) the fabric designation, selected from Table 2; c) t
30、he colour (see5.2); d) the water repellent treatment, if required (see5.4.1); e) the width of the cloth if other than900mm (seeclause6).4 blankBS6F55:1991 BSI 11-1999 Publications referred to BSF100, Procedure for inspection and testing of textiles. BS381C, Specification for colours for identificati
31、on, coding and special purposes. BS2087, Preservative treatments for textiles. BS2087-1, Specification for treatments. BS6F55:1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the
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