1、BRITISH STANDARD BS 7F 8:1992 (Superseding BS 6F 8 1975) Specification for 140 g/m 2mercerized cotton fabrics and serrated edge strip for aerospace purposesBS7F8:1992 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the au
2、thorityof the Standards Boardand comes into effect on 15August1992 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference ACE/54 Draft for comment 91/82668 DC ISBN 0 580 21031 6 Committees responsible for this British Standard The preparation of this Britis
3、h 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 Ltd. British Textile Confederation Ministry of Defence Society of British
4、Aerospace Companies Limited Society of Dyers and Colourists Textile Finishers Association Amendments issued since publication Amd. No. Date CommentsBS7F8:1992 BSI 10-1999 i Contents Page Committees responsible Inside front cover Foreword ii Section 1. General 1.1 Scope 1 1.2 References 1 1.3 General
5、 requirements 1 Section 2. Mercerized cotton fabric 2.1 Yarn 2 2.2 Manufacture 2 2.3 Finish 2 2.4 Finishing for doping 2 2.5 Rotproofing 2 2.6 Dyeing 2 2.7 Properties of the finished fabric 2 2.8 Make up 2 2.9 Identification 2 Section 3. Serrated strip 3.1 Manufacture 3 3.2 Width 3 3.3 Rotproofing 3
6、 3.4 Identification 3 Annex A (informative) Information to be supplied by the purchaser 4 Table 1 General requirements (given in BS F100) 1 Table 2 Properties of the finished fabric 2 List of references Inside back coverBS7F8:1992 ii BSI 10-1999 Foreword This British Standard, prepared under the dir
7、ection of the Aerospace Standards Policy Committee, is one of a series of a quality suitable for aerospace purposes. It is a revision of BS6F8:1975 which is withdrawn. During its preparation no changes have been made to the technical requirements, but the quality requirements specified in British St
8、andard F100 have been identified. The quality assurance authority referred to in this standard is as stated in the contract or order, or the accredited representative of the authority stated as instructed by the prime contractors. WARNING NOTE 1. This standard calls for the use of substances and/or
9、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 safety at any stage of manufacture or use. WARNING NOTE 2. This stan
10、dard 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 treatment for aerospace fabrics is available. A British
11、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. Summary of pages This document comprises a front co
12、ver, an inside front cover, pagesi andii, 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 inside front cover.BS7F8:1992 BSI 10-1999 1 Section 1. Gener
13、al 1.1 Scope This British Standard specifies a mercerized cotton fabric and strips cut from it for use primarily on aircraft surfaces. Section2 details the fabric and section3 details the strip. NOTE 1The information to be supplied by the purchaser in the contract or order is listed inAnnex A. NOTE
14、2The latest revision of an Aerospace Series Standard is indicated by a prefix number. 1.2 References 1.2.1 Normative references This British Standard incorporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in
15、 the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by updating or revision. 1.2.2 Informative reference This British Standard refers to another publication that p
16、rovides information. The edition of this publication current at the time of issue of this standard is listed on the inside back cover, but references should be made to the latest edition. 1.3 General requirements In addition to requirements specified in section2 and3 of this standard, the following
17、sections and clauses of the latest edition of BSF100 shall apply (seeTable 1). Table 1 General requirements (given in BS F100) Section Title Requirements and tests 1 General All requirements 2 Quality requirements Requirements for the manufacture of wide fabrics Requirements for dimensions and toler
18、ances (general and wide fabrics) Requirements for dyed textiles Requirements for freedom from faults: wide fabrics Requirements for freedom from corrosive impurities 3 Physical tests Tests for the determination of the number of threads per unit length in woven fabrics Test for mass: mass per unit ar
19、ea of wide fabrics Breaking strength and extension under force: wide fabrics Test for doping properties 4 Chemical tests If required by section2, further tests for freedom from corrosive impuritiesBS7F8:1992 2 BSI 10-1999 Section 2. Mercerized cotton fabric 2.1 Yarn 2.1.1 The yarn shall be two-fold
20、cotton and shall be mercerized. 2.1.2 If the warp requires sizing, a fully saponifiable size shall be used. Agents containing wax and other non-saponifiable matter shall not be used. 2.2 Manufacture The fabric shall be plain woven. 2.3 Finish The fabric shall be supplied in one of the following cond
21、itions: a) loomstate; b) finished for doping; c) scoured and rotproofed; d) scoured and dyed; e) scoured, dyed and rotproofed. NOTEThe finish required should be stated in the purchasers contract or order (seeA.1). 2.4 Finishing for doping NOTEIt will be necessary to obtain a standard sample from the
22、 quality assurance authority (see foreword) to carry out the required visual comparisons. 2.4.1 The fabric shall be calendered to a smooth finish. 2.4.2 The doping properties shall conform to BSF100. 2.5 Rotproofing 2.5.1 The fabric shall be rotproofed with pentachlorophenyl laurate (PCPL) in accord
23、ance with BS2087-1:1992, normal process. 2.5.2 No other rotproofing agent shall be used. 2.6 Dyeing Where dyeing is required, the colour of the fabric shall be specified either by reference to a British Standard, e.g.BS381C, or otherwise by pattern. NOTEThe requirement for dyeing and the colour shou
24、ld be stated in the purchasers contract or order (seeA.1). 2.7 Properties of the finished fabric 2.7.1 The finished fabric shall conform to the appropriate requirements ofTable 2. 2.7.2 Size content Fabric finished for doping shall not contain more than2.5% size by mass when tested in accordance wit
25、h BS4032:1978. 2.8 Make up The fabric shall be delivered free from creases and either: a) lapped full width on drum boards having a width of150mm and a thickness of nominally12.5mm; or b) rolled full width on tubes with an outside diameter of nominally45mm. NOTEThe make up required should be stated
26、in the purchasers contract or order (seeA.1). 2.9 Identification The fabric shall be identified for ordering purposes by the number, date and section of this British Standard (i.e. BS7F8:1992, section2), together with the finish and, if required dyed, the colour. Table 2 Properties of the finished f
27、abric Finish Minimum no. threads/cm Maximum mass per unit area Minimum average breaking strength Warp Weft Warp Weft g/m 2 N/50mm N/50mm Loomstate Finished for doping Scoured and rotproofed Scoured and dyed Scoured, dyed and rotproofed 31 31 32 32 32 32 31 29.5 29.5 29.5 150 145 150 150 160 700 720
28、675 675 675 785 720 630 630 630BS7F8:1992 BSI 10-1999 3 Section 3. Serrated strip 3.1 Manufacture 3.1.1 The serrated strip shall be cut lengthwise from fabric which conforms to section2 of this standard and which has been finished for doping, except that the warp strength shall be not less than675N
29、per50mm. 3.1.2 Each edge of the strip shall have4 to8 serrations per25mm and the depth of each serration shall not exceed3.5mm. 3.2 Width The width shall be measured between the peaksandthe tolerance on the width shall notexceed mm. NOTEThe width required should be stated in the purchasers contract
30、or order (seeA.2). 3.3 Rotproofing 3.3.1 If required, the fabric prior to cutting shall be rotproofed with pentachlorophenyl laurate (PCPL) in accordance with BS2087-1:1992, normal process. 3.3.2 No other rotproofing agent shall be used. NOTEThe requirement for rotproofing should be stated in the pu
31、rchasers contract or order (seeA.2). 3.4 Identification The serrated strip shall be identified for ordering purposes by the number, date and section of this British Standard (i.e. BS7F8:1992, section3), the width and, if required, the rotproofing. NOTEThis identification may be codified, e.g. a100mm
32、 wide rotproofed strip may be identified as: BS 7F 8:1992, section3/100mm/PCPL. +4 0BS7F8:1992 4 BSI 10-1999 Annex A (informative) Information to be supplied by the purchaser A.1 Mercerized cotton fabric The following information should be stated by the purchaser in the contract or order for merceri
33、zed cotton fabric: a) the number of this British Standard (i.e.BS7F8); b) the finish required (see2.3); c) the colour, if required dyed (see2.6); d) the make up (see2.8). A.2 Serrated strip The following information should be stated by the purchaser in the contract or order for serrated strip: a) th
34、e number of this British Standard (i.e.BS7F8); b) the colour, if required dyed (see2.6); c) the width required (see3.2); d) rotproofing, if required (see3.3).BS7F8:1992 BSI 10-1999 List of references (see clause2) Normative references BSI standards publications BRITISH STANDARDS INSTITUTION, London
35、BS 5F 100:1991, Procedure for inspection and testing of textiles for aerospace purposes 1) . BS 2087, Preservative textile treatments. BS 2087-1:1992, Specification for treatments. BS 4032:1978, Method of test for the determination of certain water- or alkali-soluble additives in cellulosic or synth
36、etic fibres, yarns and fabrics or yarns and fabrics made from blends of such fibres. Informative references BSI standards publications BRITISH STANDARDS INSTITUTION, London BS 381C:1988, Specification for colours for identification, coding and special purposes. 1) Edition current at time of publicat
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