ISO-6989-1981.pdf
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1、International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEWYHAPOAHAFI OPrAHM3AWlR fl0 CTAHAPTM3ALWl.ORGANISATlON INTERNATIONALE DE NORMALISATION Textile fibres - Determination of length and length distribution of staple fibres (by measurement of Single fibres) Fibres textiles - LMermin
2、ation de Ia longueur et de Ia distribution de longueur des fibres discon tinues (par Ie mesurage de fibres individuelles) First edition - 1981-05-15 lJ DC 677.017222 Ref. No. ISO 69894981 (EI Descriptors : textiles, fibres, dimensional measurement, length, physical tests, dimensional stability tests
3、, classification, test results. Price based on 6 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 00:47:13 MDTNo reproduction or networking permitted without license from IH
4、S -,-,- Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards institutes (ISO member bedies). The work of developing Inter- national Standards is carried out through ISO technical committees. Every member body interested in a subject for wh
5、ich a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member
6、 bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 6989 was developed by Technical Committee ISO/TC 38, Textiles, and was circulated to the member bodies in November 1979. lt has been approved by the member bodies of the following c
7、ountries : Australia Belgium Brazil Bulgaria Canada China Cyprus Czechoslovakia Denmark Egypt, Arab Rep. of Finland The member bodies of on technical grounds : the fol lowing countries expressed disapproval of the docu France Germany, F. R. Ghana India Israel Italy Korea, Rep. of Netherlands New Zea
8、land Norway Poland Hungary Japan USSR 0 International Organization for Standardization, 1981 Portugal Romania South Africa, Rep. of Spain Sweden Switzerland Turkey United Kingdom USA Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with IS
9、O Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 00:47:13 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 69894981 (E) Textile fibres - Determination of length and length distribution of staple fibres (by measurement of
10、Single fibres) 0 Introduction This International Standard is intended to replace two existing International Standards, ISO 270, Textile fibres - Determina- tion of fibre length by measuring individual fibres, and ISO 1822, Wool - Determination of fibre length using a single- fibre length measuring m
11、achine. The determination of fibre length by measuring the length of individual fibres is advocated for the following reasons : a) the fibre length is better defined than by measurement of the fibre held in combs; b) this is a general method, and its range of application is . not limited by the leng
12、th or diameter of the fibres tested; c) the risk of accidental or systematic errors is less than with other methods, particularly with collective measurements of the length of a group of fibres. lt should be noted that measurements by this method are made on straightened fibres with the crimp remove
13、d, and may give different results from those obtained by other methods of measurement. In the case of fibres which have inherent crimp, straightening the fibres may also include errors due to stret- ching. Nevertheless, other methods (for example, the comb Sorter) are quicker for some fibres (for ex
14、ample, cotton or other short fibres), and for this reason may be preferred, for routine tests, to the more exact method of measuring individual fibre lengths. ISO 2646, Wool - Measurement of the length of fibres pro- cessed on the worsted System, using a fibre diagram machine, may be used for the de
15、termination of the distribution of the length of fibres by measurement carried out on specimens of sliver processed on the worsted System. 1 Scope and field of application This International Standard specifies - three methods for determination of the length of staple fibres by measuring individual f
16、ibres; - different methods of expressing the length distribution from values obtained by measurement of individual fibres. lt applies to all discontinuous textile fibres, except those in which strong inherent crimp would render the procedure inap- plicable. lt does not apply to fibrous bundles of ba
17、st fibres. 2 References ISO 139, TextIes - Standard atmospheres for conditioning and tes ting. ISO 1130, TextJe fibres - Some methods of sampling for tes ting. 3 Principle Measurement of the individual length of each fibre - method A : on a straightened fibre on a graduated rule, under a light tensi
18、on applied with the aid of forceps and grease. This method shall be used for reference in cases of dispute, unless strong inherent crimp renders it inap- plicable. - method B : by measuring by use of an opisometer the length of the image of the fibre enlarged by projection on a Screen. - method C :
19、by use of a semi-mechanical device. Expression of the length distribution of fibres from the values of fibre length, classing the fibres into groups of length. 4 Apparatus and materials 4.1 Method A (Reference method) 4.1 .l Polished glass plate, with a millimetre scale engraved or photographed on i
20、t. 4.1.2 Pointed forceps. 4.1.3 White Petroleum jelly or liquid Paraffin. 4.2 Method B 4.2.1 Projector and Screen, with means for mounting fibres on the projector slide. 4.2.2 Opisometer and calibration slide, or other means for determining projector magnification. 4.2.3 White Petroleum jelly or liq
21、uid Paraffin. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 00:47:13 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 69894981 (E) 4.3 Method C sio
22、n at its two extremities. Measure the length of the fibre along the scale. Repeat the Operation for each fibre to be tested. 4.3.1 Apparatus for carrying out semi-automatic measure- ment of the fibre length under controlled tension, classification of fibre length in groups or classes in intervals of
23、 determined length, and registering the number of fibres in each of these groups. 7.1.2 Method B. image of a fibre Measurement of the length of the Smear the slide (4.2.2) with a thin film of the white Petroleum jelly or liquid Paraffin (4.2.31, applied with a Paper tissue. Lay a convenient number o
24、f fibres on the oiled slide; bend the fibres if they are longer that the projection field. Place a clean cover- glass on top of the fibres and hold the assembly firmly together with a small piece of adhesive tape. A convenient apparatus for use in this method is described in the annex. 4.3.2 Pointed
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