1、September 2016 English price group 11No 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).ICS 59.060.10!%$w“2560184www.din.d
2、eDIN EN ISO 137Wool Determination of fibre diameter Projection microscope method (ISO 137:2015);English version EN ISO 137:2015,English translation of DIN EN ISO 137:2016-09Wolle Bestimmung des Faserdurchmessers MikroskopProjektionsverfahren (ISO 137:2015);Englische Fassung EN ISO 137:2015,Englische
3、 bersetzung von DIN EN ISO 137:2016-09Laine Dtermination du diamtre des fibres Mthode du microscope projection (ISO 137:2015);Version anglaise EN ISO 137:2015,Traduction anglaise de DIN EN ISO 137:2016-09SupersedesDIN EN ISO 137:201605www.beuth.deDocument comprises 19 pagesDTranslation by DIN-Sprach
4、endienst.In case of doubt, the German-language original shall be considered authoritative.09.16 DIN EN ISO 137:2016-09 2 A comma is used as the decimal marker. National foreword This document (EN ISO 137:2015) has been prepared by Technical Committee ISO/TC 38 “Textiles” in collaboration with Techni
5、cal Committee CEN/TC 248 “Textiles and textile products” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-05-21 AA Physikalisch-technologische Prfve
6、rfahren 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 Compared with DIN EN ISO 137:2016-05, the following correction has been made to the German version only: a) in 7.5, “N 0,5 mm” has been rep
7、laced by “N + 0,5 mm”. National Annex NA (informative) Bibliography DIN EN ISO 139, Textiles Standard atmospheres for conditioning and testing EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 137 December 2015 ICS 59.060.10 English Version Wool - Determination of fibre diameter - Projection
8、microscope method (ISO 137:2015) Laine - Dtermination du diamtre des fibres - Mthode du microscope projection (ISO 137:2015) Wolle - Bestimmung des Faserdurchmessers - Mikroskop-Projektionsverfahren (ISO 137:2015) This European Standard was approved by CEN on 26 September 2015. CEN members are bound
9、 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 obtained on application to the CEN
10、-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 the CEN-CENELEC Management Centre ha
11、s 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, Ireland, Italy, Latvia, Lithuania, Lu
12、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brus
13、sels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 137:2015 EEuropean foreword .31 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 55 Apparatus . 66 Sampling and preparation of the test specimens
14、. 96.1 Raw wool 96.2 Slivers, rovings and yarns 96.3 Cutting of snippets . 96.3.1 Using a fibre holder and pusher . 96.3.2 Using a microtome 96.4 Mounting of test specimen . 97 Test procedure . 107.1 General 107.2 Examination of the test specimen . 107.3 Focusing . 117.4 Measuring the width of a fib
15、re image. 117.5 Recording of measurements. 128 Measurement procedure . 129 Calculation and expression of results 1210 Test report 13Annex A (informative) Example of calculation 14Annex B (informative) Accuracy of results and confidence limits for mean 16Bibliography .17Contents PageDIN EN ISO 137:20
16、16-09 EN ISO 137:2015 (E) 2Foreword 4European foreword This document (EN ISO 137:2015) has been prepared 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 sh
17、all be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016. Attention is drawn to the possibility that some of the elements of this document
18、 may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aust
19、ria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, 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, Swede
20、n, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 137:2015 has been approved by CEN as EN ISO 137:2015 without any modification. DIN EN ISO 137:2016-09 EN ISO 137:2015 (E) 3 ForewordISO (the International Organization for Standardization) is a worldwide federation of
21、national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Inte
22、rnational organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those int
23、ended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different 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 ww
24、w.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 shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document
25、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 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 expre
26、ssions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 23, Fibre
27、s and yarns.This second edition cancels and replaces the first edition (ISO 137:1975), which has been technically revised.This second edition to ISO 137 is based on the test method IWTO-8:2011, drawn up by the International Wool Textile Organization (IWTO).DIN EN ISO 137:2016-09 EN ISO 137:2015 (E)
28、4 1 ScopeThis International Standard specifies the procedure and the measurement conditions for the determination of the wool fibre diameter using a projection microscope.The method is suitable for wool fibres in any form and also for other fibres of reasonably circular cross-section. (In the case o
29、f dyed, bleached or finished fibres, the diameter might be different from that of fibres not subjected to such treatments. The estimates of fibre diameter obtained at the various stages of processing one lot of wool will not necessarily be the same.)2 Normative referencesThe following documents, in
30、whole 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, Textiles Standard atmospher
31、es for conditioning and testingISO 1130:1975, Textile fibres Some methods of sampling for testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1mean diameteraverage value of the projected width of either the wool fibre or another fibre of reaso
32、nably circular cross-section3.2total samplesample intended to be representative of a large bulk of material, in the state in which it is sent to the laboratoryNote 1 to entry: The total sample is prepared according to the procedure specified in ISO 1130.3.3subsamplesample randomly drawn from and rep
33、resentative of the total sample, which has been suitably cleaned, dried and conditioned where appropriate3.4test specimenpart of a subsample which is tested at one time4 PrincipleProjection on a screen of the magnified images of the profiles of wool fibre snippets, and measurement of their width by
34、means of a graduated scale. The operating technique ensures a random sampling of the fibres to be measured.DIN EN ISO 137:2016-09 EN ISO 137:2015 (E) 5 5 Apparatus5.1 Projection microscope, comprising a light source, a light condenser, a stage which supports the slide carrying the fibres, an objecti
35、ve, an ocular and a circular screen.5.1.1 Stage, movable in two directions at right angles by means of a sliding mechanism capable of successive displacements in 1,0 mm steps.5.1.2 Objective and ocular, capable of providing 500X magnification.5.1.3 Circular screen, equipped with a graduated scale ca
36、pable of measuring the projected image of the fibre snippet on the screen in any orientation and position within the measuring area.It is acceptable to mark a central circle having a diameter equal to one-quarter of the optical distance between the ocular and the centre of the screen. To ensure that
37、 any lens aberrations at the objective perimeter are avoided, all measurements must be made within this circle. However, some modern instruments contain much improved optics which ensure uniformity of magnification over the whole of the projected image. In the case of these instruments, no marked ci
38、rcle is needed and measurements can be made over the whole image area. In all cases where there is no marked circle on the screen, to ensure the integrity of the instruments optics, the magnification should be checked over the whole projected image by using a certified graduated scale as described i
39、n 5.2.NOTE A movable graduated scale made from transparent material and graduated on its underside in millimetres, as shown in Figure 1, is suitable.Figure 1 Centre transparent graduated scale which slides between guides5.2 Micrometer graduated scale.The projection microscope shall be calibrated per
40、iodically by means of a micrometer graduated scale (certified accurate), divided in hundredths of a millimetre and placed on the stage. One division of the micrometer (i.e. 0,01 mm), projected on the screen, shall cover exactly 5 mm of the graduated scale. The magnification is then equal to 500X.5.3
41、 Snippet cutters, suitable for cutting the fibres to a predetermined maximum length, capable of fulfilling the requirements of 6.3 regarding the cutting of the fibre pieces. The following apparatus (5.3.1) has been found suitable.5.3.1 Fibre holder and pusher. These are shown in Figures 2 and 3. The
42、 holder is a short piece of smooth steel (G) about 3 mm thick with a 1,5 mm slot into which slides the tongue of part H. The tongue of part H is fixed by a screw and may thus be adjusted to project different distances into the slot of G. The pusher consists of a steel stem with a short stop plate ne
43、ar its end; the stem has the same width as the slot, namely 1,5 mm. The stem of the pusher extends 0,8 mm beyond the stop plate.DIN EN ISO 137:2016-09 EN ISO 137:2015 (E) 6 Dimensions in millimetresKeyA steel plateB slotC steel tongueD guidesFigure 2 Fibre microtome in which the wool sample is cut i
44、nto pieces of predetermined lengthDIN EN ISO 137:2016-09 EN ISO 137:2015 (E) 7 Dimensions in millimetresFigure 3 A pusher by which a length of 0,8 mm of fibre can be pressed out5.3.2 Conventional microtome.Alternatively, a conventional microtome may be used if it is capable of fulfilling the require
45、ments of 6.3 regarding the cutting of the fibre pieces.5.4 Mounting medium, having the following properties:a) a refractive index between 1,43 and 1,53, at 20 C;b) a suitable viscosity;c) zero water absorption;d) no effect on the diameter of the fibre.Cedar wood oil and liquid paraffin are examples
46、of suitable media. Anhydrous glycerine is not suitable.5.5 Glass microscope slides, approximately 75 mm 40 mm.5.6 Cover glasses. Square or rectangular cover glass No. 1 (i.e. 0,13 mm to 0,17 mm thick) have been found suitable, as well as dimensions for the cover glass of 50 mm 35 mm.DIN EN ISO 137:2
47、016-09 EN ISO 137:2015 (E) 8 6 Sampling and preparation of the test specimens6.1 Raw wool6.1.1 Proceed in the following manner in accordance with ISO 1130:1975, 6.2.Divide the mass of the total sample into roughly 40 zones and take a handful of fibres from each zone. Divide each handful into two (taking care to avoid breaking the fibres) and reject one-half, choosing the half to be rejected at random. If the fibres are parallel, make the division into two longitudinally, i.e. in a direction which avoids selection of fibres by their ends. Divide the retained half into two and again r
