BS-F-133-1988.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS F 133:1988 Specification for Warp knitted nylon fabric for aerospace purposes UDC 629.7:677.075.6:677.017 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 133:1988 This
2、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 May 1988 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/54 Draft f
3、or comment 86/77624 DC ISBN 0 580 16350 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Committee (ACE/-) to Technical Committee ACE/54 upon which the following bodies were represented: British Rubber Manufacturers
4、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 Licensed Copy: London South Bank University, Lond
5、on South Bank University, Sat Dec 09 03:02:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 133:1988 BSI 01-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2General requirements1 3Yarn1 4Manufacture1 5Finishing1 6Properties of finished fabric1 7Type tests2 8Defects2
6、 9Identification2 Appendix A Method for determining the breaking strength of the fabric3 Appendix B Defects, definition of marking and acceptance limits3 Figure 1 Knitted construction4 Figure 2 Knitted structure for machine setting5 Figure 3 Tensile test specimen6 Table 1 Properties of finished fabr
7、ic1 Publication referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 133:1988 ii BSI 01-2000 Foreword This British Standard, prepared under the direction of the Aerospace Standards
8、Committee, is one of a series for textiles of a quality suitable for aerospace purposes and replaces DTD 5635-1. Basic quality requirements contained in the latest edition of BS F 100 have been identified. The standard specifies the requirements for a warp knitted nylon fabric for use primarily in t
9、he manufacture of towed banner targets. 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 to 6, 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
11、 front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 133:1988 BSI 01-20001 1 Scope This British Standard specifies the requirements for a warp knitted nylon fabric primarily for the manufacture of
12、 towed banner targets. NOTE 1The title of the publication referred to in this standard is given 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 9, the
13、 following clauses of the latest edition of BS F 100 shall apply. 3 Yarn 3.1 The fabric shall be manufactured from bright, continuous filament nylon 6.6 yarn. 3.2 The yarn shall have a nominal tenacity of 71 cN/tex. 3.3 The nominal yarn construction shall be either: a) all 700 dtex f100 spinning wit
14、h one end in each working guide; or b) all 235 dtex f34 3S100 with one end in each working guide. 4 Manufacture 4.1 The fabric shall be knitted on a latch or compound needle warp knitting machine of the raschel type with one looping bar, two inlaying bars and one selvedge bar. NOTEThe use of a machi
15、ne containing 9 or 10 needles per inch has been found satisfactory. 4.2 The fabric shall have a knitted mesh construction in accordance with Figure 1 and Figure 2. NOTE 1The following quantities of yarn used on each of the four bars have been found suitable. NOTE 2The working guides using two ends o
16、f yarn are acceptable in the selvedge. 4.3 Selvedges shall be straight, even and shall not be substantially thicker than the body of the fabric. The selvedge shall be not less than 14 mm or more than 24 mm wide. 4.4 The direction of knitting shall be identified on each roll of fabric delivered by a
17、label endorsed “End knitted last” secured on a selvedge at a position between 1 m and 2 m from the last knitted end of the fabric. The fabric shall be supplied with the end knitted last on the outside of the roll. 5 Finishing 5.1 The fabric shall be wet treated to remove the spin finish and heat set
18、 at 180 C to 185 C. 5.2 After heat setting the fabric shall be treated with a water based polyvinyl chloride composition. NOTEA currently acceptable finishing process gives an add-on of 10 % by mass on the finished fabric. 5.3 Markings regarding the end knitted last shall be retained throughout fini
19、shing. 6 Properties of finished fabric The fabric as supplied shall comply with clause 7 and Table 1. Table 1 Properties of finished fabric SectionTitleRequirements and tests OneGeneralAll requirements TwoQuality requirements Requirements for the manufacture of wide fabrics Requirements for freedom
20、from corrosive impurities ThreePhysical tests Test for determination of mass Test for breaking strength and extension under load Test for flexibility of fabrics Bar 1 (Loops)3 280 mm per rack on 372 working guides Bar 2 (Inlay)2 320 mm per rack on 363 working guides Bar 3 (Selvedges)5 400 mm per rac
21、k on 4 working guides Bar 4 (Inlay)1 840 mm per rack on 363 working guides Overall widthSelvedge width Mass per unit area Rectangles per metreMinimum breaking strengtha LengthwiseWidthwiseLengthwiseWidthwise mmmmg/m2N/10 rectangles 1 860 3014 to 24190 20160 15190 207001 000 a Determined in accordanc
22、e with Appendix A. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 133:1988 2 BSI 01-2000 7 Type tests 7.1 The flexibility of the fabric shall be tested in accordance with BS F 100 except that: a) the spec
23、imen shall be 500 mm in length; five complete rectangles wide in the warp direction and four complete rectangles wide in the weft direction; b) the specimen shall be held in contact with the horizontal surface by a slider, the undersurface of which is covered by a layer of high friction material. Th
24、e slider shall be the width of the specimen. 7.2 The mean length of overhang shall be 215 mm 15 mm in the warp and shall be 250 mm 20 mm in the weft. 8 Defects 8.1 Defects in the fabric as supplied shall be classified and marked in accordance with Appendix B. 8.2 The acceptance limits of Appendix B
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