BS-2863-1984 ISO-7211-3-1984.pdf
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1、BRITISH STANDARD BS 2863:1984 ISO 7211-3: 1984 Method for Determination of crimp of yarn in fabric ISO title: Textiles Woven fabrics Construction Methods of analysis Part 3: Determination of crimp of yarn in fabric UDC 677.014.886:677.074 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:35:
2、26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2863:1984 This British Standard, having been prepared under the direction of the Fibres, Yarns, Fabrics and Production Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 September 1984 BSI 06-1999 Fi
3、rst published July 1957 First revision July 1972 Second revision September 1984 The following BSI references relate to the work on this standard: Committee reference FBM/11 Draft for comment 82/37515 DC ISBN 0 580 14017 2 Committees responsible for this British Standard The preparation of this Briti
4、sh Standard was entrusted by the Fibres, Yarns, Fabrics and Production Standards Committee (FBM/-) to Technical Committee FBM/11 upon which the following bodies were represented: British Clothing Industry Association British Retailers Association British Textile Employers Association Central Council
5、 of the Irish Linen Industry Confederation of British Wool Textiles Limited Consumer Standards Advisory Committee of BSI Department of Trade and Industry (Chemicals, Textiles, Paper and Miscellaneous Division) Furnishing Fabrics Association Institute of Trading Standards Administration International
6、 Wool Secretariat Knitting Industries Federation Ltd. Mail Order Traders Association of Great Britain Man-made Fibres Producers Committee Manchester Testing House Ministry of Defence Society of Dyers and Colourists Textile Distributors Association Textile Institute Textile Research Council Coopted m
7、embers Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:35:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2863:1984 BSI 06-1999i Contents Page Committees responsibleInside front cover National forewordii 0Introduction1 1Sco
8、pe and field of application1 2Reference1 3Definitions1 4Principle1 5Apparatus1 6Conditioning and testing atmosphere1 7Test specimens1 8Procedure2 9Calculation and expression of results2 10Test report2 Annex Straightening tensions3 Table Straightening tensions3 Publications referred toInside back cov
9、er Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:35:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2863:1984 ii BSI 06-1999 National foreword This revision of this British Standard, which has been prepared under the direction of the Fibres, Yarns, Fabrics and Production Standards Commi
10、ttee, supersedes BS 2863:1972, which is withdrawn. It is identical with ISO 7211-1984 “Textiles Woven fabrics Construction Methods of analysis Part 3: Determination of crimp of yarn in fabric”, published by the International Organization for Standardization (ISO). Terminology and conventions. The te
11、xt of the international standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decima
12、l marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Where the words “International Standard” and “this part of ISO 7211” or “ISO 7211-3” appear, referring to this standard, they should be read as “British Standard” and “BS 2863” respective
13、ly. 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. Cross-reference International standar
14、dCorresponding British Standard ISO 139-1973BS 1051:1981 Glossary of terms relating to the conditioning, testing and mass determination of textiles (Technically equivalenta) a This British Standard glossary contains all the relevant information which, in the international standard, is written in ter
15、ms of requirements. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, 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 amendmen
16、t table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:35:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2863:1984 BSI 06-19991 0 Introduction The interlacing of threads in a fabric imposes a waviness or crimp on both warp and weft yarns. Hence, the distance b
17、etween the ends of a warp thread, for instance, as it lies in a piece of fabric, is less than the length of the straightened thread, and the difference between these two lengths is used in the measurement of crimp. In this technique it is necessary to apply a tension to straighten the crimped thread
18、. Ideally, this tension would be one which removes all crimp without extending the thread, but this will rarely be possible. Consequently, a table of tensions has been included (see the Annex ) as a guide with the aim of striking a balance between some inevitable extension and the incomplete removal
19、 of crimp; any residual crimp is then ignored. When a figured fabric is under examination, it will be necessary to ensure that threads for testing are taken from a complete repeat of the pattern. 1 Scope and field of application This part of ISO 7211 specifies a method for the determination of crimp
20、 of yarn in fabric. The method is applicable to most woven fabrics but is unsuitable for fabrics manufactured in such a way as to render removal of the crimp from the yarns impossible or impractical under the specified straightening tension. 2 Reference ISO 139, Textiles Standard atmospheres for con
21、ditioning and testing. 3 Definitions For the purposes of this part of ISO 7211, the following definitions apply: 3.1 percentage crimp the mean difference between the straightened thread length and the distance between the ends of the thread while in the fabric, expressed as a percentage of the latte
22、r 3.2 straightening tension the minimum force which, when applied to a yarn, removes the crimp caused by weaving 4 Principle Threads are removed from a strip of fabric of known length, straightened by a tension which is varied according to the nature and linear density of the yarn and measured in th
23、e straightened state. The difference between the straightened length of the thread and the distance between the ends while in the fabric is expressed as a percentage of the latter. 5 Apparatus 5.1 Thread straightening and measuring device, horizontal or vertical and complying with the following requ
24、irements: a) there shall be two yarn grips, each of which closes at its rear end first and when closed has parallel gripping-surfaces; b) it shall be possible to alter the distance between the grips; c) it shall be possible to measure the distance between the grips; d) a datum line shall be marked o
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