BS 5F 58-2002 Cotton thread for aerospace purposes《航天航空用棉线》.pdf

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1、BRITISH STANDARD AEROSPACE SERIES BS 5F 58:2002 (Superseding BS 4F 58:1990) Cotton thread for aerospace purposes ICS 49.025.60 BS 5F 58:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of t

2、he Sector Policy and Strategy Committee on 17 October 2002 BSI 17 October 2002 First published BS F 58:1947 Second edition BS 2F 58:1960 Third edition BS 3F 58:1975 Fourth edition BS 4F 58:1990 Fifth edition BS 5F 58:2002 The following BSI references relate to the work on this standard: Draft for co

3、mment 00/707768 DC Committee reference ACE/22 ISBN 0 580 37034 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/22, Cords, ropes and threads for aerospace purposes, upon which the following bodies were represented: L

4、inen Sewing Threads Manufacturers Association Ministry of Defence UK Defence Standardization Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBS 5F 58:2002 BSI 17 October 2002 i Contents Page Committees responsible Inside front cover Foreword ii 1

5、S c o p e 1 2 Normative references 1 3G e n e r a l 1 4Y a r n 2 5 Construction and properties 2 6 Finish 2 7T y p e t e s t 2 8 Identification 2 Table 1 General requirements (given in BS F 100) 1 Table 2 Construction and properties 2BS 5F 58:2002 ii BSI 17 October 2002 Foreword This British Standar

6、d, prepared under the direction of Technical Committee ACE/22, is one of a series for textiles of a quality suitable for aerospace purposes. It supersedes BS 4F 58:1990 which is withdrawn. NOTE The previous edition, BS 4F 58:1990, differed from the earlier edition primarily in that only one thread w

7、as specified. This new edition updates references and improves nomenclature in line with other standards in the same series. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard

8、does not of itself confer immunity from legal obligations. WARNING NOTES 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 t

9、he user from statutory obligations relating to health and safety at any stage of manufacture or use. This standard specifies pentachlorophenyl laurate (PCPL) as the only approved rotproofing treatment for aerospace textiles. Alternative treatments are under development, and this standard will be upd

10、ated to delete PCPL as soon as an approved alternative treatment for aerospace textiles is available. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 2, an inside back cover and a back cover. The BSI copyright notice displayed in this documen

11、t indicates when the document was last issued.BS 5F 58:2002 BSI 17 October 2002 1 1 Scope This British Standard specifies the requirements for a cotton thread, for use primarily as safety ties and break threads, for aerospace purposes. NOTE The latest revision of an Aerospace Standard is indicated b

12、y the prefix number. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS 38

13、1C, Specification for colours for identification, coding and special purposes. BS 1932-2, Testing the strength of yarns and threads from packages Methods for determination of knot strength and loop strength. BS 2087-1, Preservative treatments for textiles Specification for treatments. BS F 100, Proc

14、edure for inspection and testing of textiles for aerospace purposes. BS EN ISO 2060:1995, Textiles Yarn from packages Determination of linear density (mass per unit length) by the skein method. BS EN ISO 2061, Textiles Determination of twist in yarns Direct counting method. 3 General 3.1 Requirement

15、s from BS F 100 In addition to the requirements specified in Clause 4, Clause 5, Clause 6, Clause 7 and Clause 8 of this standard the requirements and tests given in the latest edition of BS F 100 as specified in Table 1, shall apply. Table 1 General requirements (given in BS F 100) 3.2 Freedom from

16、 faults The thread shall have uniformity of thickness, construction, and component ply tension so that there are no visually irregular twist faults. The thread shall contain no thread knots. NOTE Up to two laid-on ends per package are permitted. Section of BS F 100 Section title Requirements and tes

17、ts 1 General All requirements 2 a Quality requirements Requirements for dyed textiles except those related to fabric intended for coating Requirements for freedom from corrosive impurities (see BS F 100, Section 4) 3 Physical tests Tests for breaking strength and extension under force 4 Chemical tes

18、ts If required by BS F 100, Section 2: test for conductivity of aqueous extract; test for pH value of aqueous extract; test for water soluble chloride; test for water soluble sulfate. a It is not intended that BS F 100, Section 2 tests should be performed on each thread batch. The frequency of these

19、 tests should be agreed between the Quality Assurance Authority and the thread manufacturer, see BS F 100.BS 5F 58:2002 2 BSI 17 October 2002 3.3 Length per unit mass The length per unit mass of thread shall be determined in accordance with BS EN ISO 2060:1995, Option 1. 4 Yarn The thread shall be m

20、anufactured from combed cotton yarn. 5 Construction and properties 5.1 The construction and properties of the finished thread shall conform to the requirements of Table 2. Table 2 Construction and properties 5.2 The direction of final twist shall be Z. 6 Finish 6.1 Condition of material The thread s

21、hall be supplied scoured, dyed to BS 381C shade 539 and rotproofed with pentachlorophenyl laurate (PCPL) in accordance with BS 2087-1, normal process. NOTE It is very important that the scouring process is thorough in order to remove surface acting agents and processing acids. 6.2 Finish The thread

22、shall have a soft finish. Finishes which promote microbiological growth (e.g. starch or modified starch) shall not be applied. 7 Type test 7.1 General The type test specified in 7.2 shall be carried out to the satisfaction of the quality assurance authority. After initial satisfaction of the type te

23、st, no changes in respect of either the materials or processing conditions used shall be made without the type test being repeated to the satisfaction of the quality assurance authority. The manufacturers records of type tests shall be made available to the quality assurance authority on request. 7.

24、2 Loop breaking strength The thread shall have a minimum average loop breaking strength of 20 N when tested in accordance with BS 1932-2. 8 Identification The thread shall be identified for ordering purposes by the number of this British Standard, i.e. “BS 5F 58”. Designation Structure a Minimum len

25、gth per unit mass Minimum average breaking strength Maximum strength Nominal tex/Turns per m m/kg N N 60/2/3 10 tex 2S 1 3501 650 3Z 530650 13 180 13.3 20 a The twist shall be determined in accordance with BS EN ISO 2061.blankBS 5F 58:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standar

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