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1、BRITISH STANDARD AEROSPACE SERIES BS 7F 35:1985 (Superseding BS 6F 35:1975) Incorporating Amendment No. 1 Specification for Braided linen (flax) lacing cord for aerospace purposes UDC 629.7:677.11.076.75 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 G
2、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7F 35:1985 This British Standard, having been prepared under the direction of the Aerospace Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1985 BSI 02-2000 The following BSI references relate
3、 to the work on this standard: Committee reference ACE/22 Draft for comment 84/70529 DC ISBN 0 580 14148 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Committee (ACE/-) to Technical Committee ACE/22 upon which the
4、 following bodies were represented: British Association of Clothing Machinery Manufacturers British Textile Employers Association Lambeg Industrial Research Association Linen Sewing Thread Manufacturers Association Man-made Fibres Producers Committee Ministry of Defence Narrow Fabrics Federation Soc
5、iety of British Aerospace Companies Limited Society of Dyers and Colourists Amendments issued since publication Amd. No.Date of issueComments 6068October 1989Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00
6、 2006, Uncontrolled Copy, (c) BSI BS 7F 35:1985 BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2General requirements1 3Yarn1 4Finish1 5Construction and properties1 6Identification1 Table 1 Construction and properties2 Publications referred toInside back cover
7、Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7F 35:1985 ii BSI 02-2000 Foreword This British Standard, prepared under the direction of the Aerospace Standards Committee, is one of a series for textiles of
8、 a quality suitable for aerospace purposes and is a revision of BS 6F 35:1975 which is withdrawn. It differs from the previous edition primarily in that provision for the supply of cord not rotproofed has been deleted. During its preparation, account has been taken of the fact that basic quality req
9、uirements are now included in BS F 100. 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. S
10、ummary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, 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
11、e front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7F 35:1985 BSI 02-20001 1 Scope This British Standard specifies requirements for a braided linen (flax) lacing cord for aerospace purposes. NOTE
12、 1The titles of the publications referred to in this standard are listed on the inside back cover. NOTE 2The 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 6 of this standard, the follo
13、wing sections and clauses of the latest edition of BS F 100 shall apply. 3 Yarn 3.1 The cord shall be manufactured from flax fibre (Linum usitatissimum). 3.2 The mass of the yarn shall have been reduced by not less than 10 % by boiling. NOTEThe degree of boiling of the yarn should be determined from
14、 the manufacturers records, if available. Otherwise, the Residual Alkali Solubility of the cord should be determined and should not exceed 10 %. 4 Finish 4.1 Condition of material The cord shall be supplied in one of the following conditions: a) undyed and rotproofed; b) undyed, rotproofed and wax f
15、inished; c) dyed and rotproofed; d) dyed, rotproofed and wax finished. 4.2 Dyeing Where dyeing is required, the colour shall be specified either by reference to a British Standard, e.g. BS 381C, or otherwise by pattern. 4.3 Rotproofing The cord shall be treated with pentachlorophenyl laurate (PCPL)
16、from aqueous emulsion, normal process, as specified in 8.7 of BS 2087-1:1981. 4.4 Wax finishing Where wax finishing is required, beeswax substitute microcrystalline hydrocarbon wax shall be used and the added mass due to the wax shall be. Prior to waxing, the thread shall have been rotproofed in acc
17、ordance with 4.3. 4.5 Surface finish Cord supplied in accordance with item a) or c) of 4.1 shall have a soft, smooth finish, but substances which may promote microbiological growth (e.g. starch or modified starch) shall not be applied. 5 Construction and properties The cord shall comply with the req
18、uirements given in Table 1 and the braid interlacing shall be one under two over two. 6 Identification The cord shall be identified for ordering purposes by the number of this British Standard, i.e. BS 7F 35, together with the finish and, if required dyed, the colour. NOTEThis identification may be
19、codified. For example, cord required dyed black, rotproofed and wax finished may be identified as “BS 7F 35/black/PCPL/wax finished”. General requirements (given in BS F 100) SectionTitleRequirements and tests 1GeneralAll requirements 2Quality requirements Requirements for dyed textiles (when the co
20、rd is required dyed) except those relating to fabric intended for coating Requirements for dimensions and tolerances related to length of cordage and braided cordage Requirements for freedom from corrosive impurities (see section 4) Requirements for freedom from defects, including those in appendix
21、A.3 related to braided cords 3Physical tests Test for breaking strength and extension under load Test for plaits per unit length in braided cordage 4Chemical tests If required by section 2, further tests for freedom from corrosive impurities Test for residual alkali solubility 30 + 5 10% Licensed Co
22、py: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7F 35:1985 2 BSI 02-2000 Table 1 Construction and properties Nominal resultant count Number of carriers Number of yarns per carrier Plaits per metre Length/mass of undyed
23、, unproofed cord Minimum breaking strength unwaxedwaxed tex 910161355 40 m/kg 1 100 100 N 220 N 180 NOTEDetermine the maximum count in accordance with BS 2010. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
24、 7F 35:1985 BSI 02-2000 Publications referred to BS 381C, Specification for colours for identification, coding and special purposes. BS 2010, Method for determination of the linear density of yarns from packages. BS 2087, Preservative treatments for textiles. BS 2087-1, Specification for treatments.
25、 BS F 100, Procedure for inspection and testing of textiles. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7F 35:1985 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the i
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34、esignations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI