1、September 2014 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 59.060.10!%;$n“2240175www.din.deDDIN EN ISO 10306Textiles Cotton fibres Evaluation of maturity by the air flow method (ISO 10306:2014);English version EN ISO 10306:2014,English translation of DIN EN ISO 10306:2014-09Textilien Baumwollfasern Bewertung der Reife durch das Luftstrom-Prfverfahren (IS
3、O 10306:2014);Englische Fassung EN ISO 10306:2014,Englische bersetzung von DIN EN ISO 10306:2014-09Textiles Fibres de coton valuation de la maturit par la mthode courant dair (ISO 10306:2014);Version anglaise EN ISO 10306:2014,Traduction anglaise de DIN EN ISO 10306:2014-09SupersedesDIN EN ISO 10306
4、:1995-05www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 12 pages09.14 DIN EN ISO 10306:2014-09 2 A comma is used as the decimal marker. National foreword This document (EN ISO 10306:2014) has been prepared by Technical Committee ISO/TC
5、38 “Textiles” in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA
6、062-05-21 AA Physikalisch-techno-logische Prfverfahren fr Textilien. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 139 DIN EN ISO 139 Amendments This standard differs from DIN EN ISO 10306:1995-05 as follows: a) normative references have
7、 been updated; b) the standard has been editorially revised; c) Annex B “Method for instrument calibration” has been added. Previous editions DIN EN ISO 10306: 1995-05 National Annex NA (informative) Bibliography DIN EN ISO 139, Textiles Standard atmospheres for conditioning and testing EN ISO 10306
8、June 2014 ICS 59.060.10 Supersedes EN ISO 10306:1995English Version Textiles - Cotton fibres - Evaluation 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 Re
9、ife durch das Luftstrom-Prfverfahren (ISO 10306:2014) This European Standard was approved by CEN on 20 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
10、alteration. Up-to-date lists and bibliographical references concerning such national standards may be 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
11、 made by translation under the responsibility of a CEN member into its own language and notified to the 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, E
12、stonia, 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 United Kingdom. CEN-CENELEC Management C
13、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 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME
14、EUROPENNEEUROPISCHE NORMContents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references. 5 3 Terms and definitions 5 4 Principle 6 5 Apparatus and materials . 6 6 Atmosphere for conditioning and testing . 7 7 Sampling and number of specimens . 7 8 Procedure 7 9 Calculations and expres
15、sion of results . 7 10 Test report . 8 Annex A (normative) Operation of the air flow instrument “Fineness/Maturity Tester” 9 Annex B (normative) Method for instrument calibration . 10 2DIN EN ISO 10306:2014-09 EN ISO 10306:2014 (E) ForewordThis document (EN ISO 10306:2014) has been prepared by Techn
16、ical 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 endorsement, at th
17、e 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 identifying any
18、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 Republic, Denmar
19、k, 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. Endorsement noti
20、ce The text of ISO 10306:2014 has been approved by CEN as EN ISO 10306:2014 without any modification. “ ”3DIN EN ISO 10306:2014-09EN ISO 10306:2014 (E)IntroductionThe term “cotton fibre maturity” is commonly used to signify the relative degree of fibre wall development. The measurement of the relati
21、ve degree of wall thickening is too laborious for most practical purposes, therefore the determination 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 th
22、e maturity of cotton fibres using air flow instruments, which is the object of this standard.4DIN EN ISO 10306:2014-09 EN ISO 10306:2014 (E) 1 ScopeThis International Standard specifies a method for the evaluation of the maturity of loose randomized cotton fibres by measuring the resistance to air f
23、low of a 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 w
24、hole or 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 atmos
25、pheres for 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 d
26、ocument, 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
27、1 to entry: 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
28、 thickness 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 4912:19815DIN EN ISO 10306:2014-09EN ISO 10306:2014 (E)3.4percen
29、t 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 arbitrary scale, the so-called micronaire scaleNote 1 to
30、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 randomized cotton fibres. For the same mass of fibres the per
31、meability 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 millimetres, of a water column. The pressure drop obtained
32、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 formulae. The micronaire value is determined solely from the
33、 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 comprising the air flow instrument are:5.2.1 Compression cy
34、linder, 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 measuring air permeability of the specimen, comprising for ex
35、ample: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 specimen and a gauge for measuring the air pressure drop
36、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 calibration cotton standardsReference cotton used for the cali
37、bration of air flow instruments is described in B.2.2.6DIN EN ISO 10306:2014-09 EN ISO 10306:2014 (E) 5.4 Specimen preparation apparatusAny blending apparatus is considered suitable if it produces randomly oriented samples.NOTE Apparatus that produces webs of predominantly parallel fibres is not sui
38、table.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 in the standard atmosphere for conditioning (see ISO 139:2005).7 Sampling
39、 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 the interested parties. In the absence of any instructions, test at least t
40、wo 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 instrument.8 Procedure8.1 Before each series of measurements, make the nec
41、essary 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 diameter and place each portion successively into the sample holder unti
42、l 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 all the specimen and not to lose any of the fibres. Insert the compression
43、 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 after 10 s note the reading, PL. on the pressure scale of the instrument t
44、o 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 instrument to the same accuracy of 1 mm of the water column.8.4 Remove the test s
45、pecimen 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
46、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 Calculations and expression of resultsAverage the two readings of each pressure drop, PL and PH, taken for each specimen tested from a sample. Us
47、ing each pair of average readings, PL and PH, calculate the maturity ratio, M, or the percent 7DIN EN ISO 10306:2014-09EN ISO 10306:2014 (E)maturity, Pmof each specimen via the appropriate conversion formula (see Annex A). Average the readings of pressure drops PL and PH, and average the values calc
48、ulated for the two specimens tested from a sample.10 Test reportThe test report shall include the following information:a) reference to this International Standard;b) the material source and if possible type and/or botanical species;c) the number of specimens tested, the number of readings per speci
49、men, the number of samples used, and the sampling method;d) the average of the values measured for PL and PH, the calculated values such as maturity ratio, M, or percent maturity, Pm, and also the equation used;e) type, make and model of instrument used;f) date of the test.8DIN EN ISO 10306:2014-09 EN ISO 10306:2014 (E) Annex A (normative) Operation of the air flow instrument “Fineness/Maturity Tester”A.1 GeneralThere are several models of “Fineness/Ma
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