BS EN ISO 10306-2014 Textiles Cotton fibres Evaluation of maturity by the air flow method《纺织品 棉纤维成熟度的气流评定法》.pdf

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1、BSI Standards PublicationBS EN ISO 10306:2014T e x t i l e s C o t t o n f i b r e s Evaluation of maturity by the air flow methodBS EN ISO 10306:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 10306:2014. It supersedes BS EN ISO 10306:1995 which is wit

2、hdrawn.The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a co

3、ntract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 69631 2ICS 59.060.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the a

4、uthority of the Standards Policy and Strategy Committee on 30 June 2014.Amendments/corrigenda issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10306 June 2014 ICS 59.060.10 Supersedes EN ISO 10306:1995English Version Textiles - Cotton fibres - Evalua

5、tion of maturity by the air flow method (ISO 10306:2014) Textiles - Fibres de coton - valuation de la maturit par la mthode courant dair (ISO 10306:2014) Textilien - Baumwollfasern - Bewertung der Reife durch das Luftstrom-Prfverfahren (ISO 10306:2014) This European Standard was approved by CEN on 2

6、0 April 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be

7、 obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to t

8、he CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ir

9、eland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management C

10、entre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10306:2014 EBS EN ISO 10306:2014BS EN ISO 10306:2014EN ISO 10306:2014 (E) 3 Foreword This document (EN ISO 10306:2014) has been prepa

11、red by Technical Committee ISO/TC 38 “Textiles“ in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endo

12、rsement, at the latest by December 2014, and conflicting national standards shall be withdrawn at the latest by December 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for id

13、entifying any or all such patent rights. This document supersedes EN ISO 10306:1995. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re

14、public, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. En

15、dorsement notice The text of ISO 10306:2014 has been approved by CEN as EN ISO 10306:2014 without any modification. BS EN ISO 10306:2014ISO 10306:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25

16、 Apparatus and materials 26 Atmosphere for conditioning and testing 37 Sampling and number of specimens 38 Procedure. 39 Calculations and expression of results 310 Test report . 4Annex A (normative) Operation of the air flow instrument “Fineness/Maturity Tester” . 5Annex B (normative) Method for ins

17、trument calibration 6BS EN ISO 10306:2014ISO 10306:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committee

18、s. Each member body interested in a subject for which a technical committee has been established 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. ISO collaborates closely with the Inter

19、national Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the diff

20、erent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO sha

21、ll not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document

22、is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT

23、) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and yarns.This second edition cancels and replaces the first edition (ISO 10306:1993), of which it constitutes a minor revision.iv ISO 2014 All

24、rights reservedBS EN ISO 10306:2014ISO 10306:2014(E)IntroductionThe term “cotton fibre maturity” is commonly used to signify the relative degree of fibre wall development. The measurement of the relative degree of wall thickening is too laborious for most practical purposes, therefore the determinat

25、ion of the maturity of cotton fibres is done by indirect methods. A microscopic method is described in ISO 4912:1981. This method has been used as a reference method for the industrial evaluation of the maturity of cotton fibres using air flow instruments, which is the object of this standard. ISO 2

26、014 All rights reserved vBS EN ISO 10306:2014BS EN ISO 10306:2014Textiles Cotton fibres Evaluation of maturity by the air flow method1 ScopeThis International Standard specifies a method for the evaluation of the maturity of loose randomized cotton fibres by measuring the resistance to air flow of a

27、 plug of cotton fibres under two prescribed conditions. The method is applicable to cotton taken at random from bales. Laps and slivers or other sources of lint cotton may be tested, however results may differ if fibres are taken from bales.2 Normative referencesThe following documents, in whole or

28、in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 139:2005, Textiles Standard atmospheres f

29、or conditioning and testingISO 1130:1975, Textile fibres Some methods of sampling for testingISO 2403:2014, Textiles Cotton fibres Determination of micronaire valueISO 4912:1981, Textiles Cotton fibres Evaluation of maturity Microscopic method3 Terms and definitionsFor the purposes of this document,

30、 the terms and definitions given in ISO 4912:1981 and ISO 2403:2014 apply. The following terms and definitions are repeated here for the convenience of the user.3.1immature fibrefibre which, upon swelling, either assumes a spiral form or lies flat, thinly outlined and almost transparentNote 1 to ent

31、ry: It has a wall thickness of less than one-fourth of the maximum fibre width.SOURCE: ISO 4912:19813.2mature fibresfibres, the cell walls of which have developed sufficiently so that upon swelling, they become unconvoluted and almost rod-like in shapeNote 1 to entry: Such fibres have a wall thickne

32、ss equal to or greater than one-fourth of the maximum fibre width.SOURCE: ISO 4912:19813.3maturity ratio, Mratio of the degree of wall thickening to a standard degree of thickening selected arbitrarily to equal 0,577SOURCE: ISO 4912:1981INTERNATIONAL STANDARD ISO 10306:2014(E) ISO 2014 All rights re

33、served 1BS EN ISO 10306:2014ISO 10306:2014(E)3.4percent maturity, Pmaverage percentage of mature fibres in a sample, based on the total number of fibresSOURCE: ISO 4912:19813.5micronaire valuemeasure of the air permeability of a mass of cotton under specified conditions, expressed in terms of an arb

34、itrary scale, the so-called micronaire scaleNote 1 to entry: The micronaire scale is based on a range of cottons to which micronaire values have been assigned by international agreement. SOURCE: ISO 2403:20144 PrincipleAir is passed through a test specimen consisting of a plug of well-opened randomi

35、zed cotton fibres. For the same mass of fibres the permeability is measured by two different compressions of the plug. For each compression, air is passed through the plug at a specified rate and the pressure drop across the plug is indicated on a pressure gauge and expressed as the height, in milli

36、metres, of a water column. The pressure drop obtained at low compression of the plug is designated PL and the other, at high compression, is designated PH. These two pressures may be used to calculate a maturity ratio and fibre linear density or a percentage of mature fibres using appropriate formul

37、ae. The micronaire value is determined solely from the PL value.5 Apparatus and materials5.1 Balance, of sufficient capacity to weigh the test specimen required for the air flow instrument used, with a sensitivity of better than 0,005 g.5.2 Air flow instrument (see Annex A).The principal parts compr

38、ising the air flow instrument are:5.2.1 Compression cylinder, with perforated end, of such dimensions that with the specified mass of specimen each cubic centimetre of the cylinder shall contain 0,191 1 g of cotton at low compression and 0,382 1 g of cotton at high compression.5.2.2 Means of measuri

39、ng air permeability of the specimen, comprising for example:a) a suitable air pump;b) two valves or other means for controlling the flow of air through the specimen or the pressure drop across the specimen in the compression cylinder;c) means for setting the required rate of air flow through the spe

40、cimen and a gauge for measuring the air pressure drop across the specimen.NOTE Details of certain commercially available instruments which comply with this specification are given in Annexes A and B. The method of calibration of air flow instruments is described in Annex B.5.3 International calibrat

41、ion cotton standardsReference cotton used for the calibration of air flow instruments is described in B.2.2.2 ISO 2014 All rights reservedBS EN ISO 10306:2014ISO 10306:2014(E)5.4 Specimen preparation apparatusAny blending apparatus is considered suitable if it produces randomly oriented samples.NOTE

42、 Apparatus that produces webs of predominantly parallel fibres is not suitable.6 Atmosphere for conditioning and testing6.1 Condition test samples in the standard atmosphere for 4 h in moving air or alternatively for 12 h in still air. Preconditioning is not required.6.2 Weigh and test the specimen

43、in the standard atmosphere for conditioning (see ISO 139:2005).7 Sampling and number of specimensThe sampling scheme, the number of specimens to be tested and the number of measurements to be made on each specimen will normally be determined by the material specification or will be agreed between th

44、e interested parties. In the absence of any instructions, test at least two specimens, making two tests on each. Samples of raw cotton from bales may be taken according to the method described in ISO 1130:1975.The mass of the test specimens shall be as specified by the manufacturer of the air flow i

45、nstrument.8 Procedure8.1 Before each series of measurements, make the necessary preliminary adjustments appropriate to the instrument in use (see Annexes A and B).8.2 Divide the weighed specimen with the fingers into four to six portions, tease each portion out randomly until about 50 mm to 70 mm in

46、 diameter and place each portion successively into the sample holder until the entire specimen is loaded. Carefully insert the first portion so as to fill in the bottom edges of the sample holder by pushing it well into the bottom of the sample holder and outwards to the edges. Take care to insert a

47、ll the specimen and not to lose any of the fibres. Insert the compression plunger and lock it in its position. Avoid fibres sticking between the cylinder wall and the compression plunger.8.3 Cause air to flow through the specimen at the appropriate flow rate for the low compression of the plug and a

48、fter 10 s note the reading, PL. on the pressure scale of the instrument to an accuracy of 1 mm of the water column. Next cause air to flow through the specimen at the appropriate flow rate for the high compression of the plug and after 10 s note the reading, PH, on the pressure scale of the instrume

49、nt to the same accuracy of 1 mm of the water column.8.4 Remove the test specimen from the cylinder and reinsert it, reversing the individual portions, and repeat the procedure given in 8.2 and 8.3.8.5 Repeat the procedure given in 8.2 to 8.4 on a second test specimen taken from the same sample.If the PL or PH readings of the two successive specimens from the same sample differ by more than 5 %, it is recommended to examine a new specimen from the same sample and to calculate the average readings for all specimens tested.9 Ca