1、Designation: D6466 10 (Reapproved 2018)Standard Test Method forDiameter of Wool and Other Animal Fibers By Sirolan-Laserscan Fiber Diameter Analyser1This standard is issued under the fixed designation D6466; the number immediately following the designation indicates the year oforiginal adoption or,
2、in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a procedure, using the Sirolan-Laserscan, for the determi
3、nation of the average fiber diameterand the fiber diameter variation in wool and other animal fibersin their various forms.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It
4、is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on s
5、tandard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD584
6、Test Method for Wool Content of Raw WoolLaboratory ScaleD1060 Practice for Core Sampling of Raw Wool in Packagesfor Determination of Percentage of Clean Wool FiberPresent2D1776 Practice for Conditioning and Testing TextilesD2130 Test Method for Diameter of Wool and Other AnimalFibers by Microproject
7、ionD2252 Specification for Fineness of Types of Alpaca (With-drawn 2018)3D2816 Test Method for Cashmere Coarse-Hair Content inCashmere (Withdrawn 2018)3D3991 Specifications for Fineness of Wool or Mohair andAssignment of GradeD3992 Specifications for Fineness of Wool Top or MohairTop and Assignment
8、of GradeE126 Test Method for Inspection, Calibration, and Verifica-tion of ASTM HydrometersE1750 Guide for Use of Water Triple Point Cells2.2 Federal Standards:Official Standards of the United States for Grades ofWool, Section 31.04Measurement Method for Determining Grade of Wool, Sec-tion 31.2044Of
9、ficial Standards of the United States for Grades of WoolTop, Section 31.15Measurement Method for Determining Grade of WoolTop, Section 31.3015IWTO-8 Method of Determining Wool Fiber Diameter bythe Projection Microscope6IWTO-12 Measurement of the Mean and Distribution ofFibre Diameter Using the Sirol
10、an-Laserscan Fibre Diam-eter Analyser63. Terminology3.1 For all terminology relating to D13.13, Wool and WoolFelt, refer to Terminology D4845.3.1.1 The following terms are relevant to this standard:average fiber diameter, grade, and snippet.3.2 For definitions of other textile terms used in this tes
11、tmethod, refer to Terminology D123.4. Summary of Test Method4.1 This test method describes procedures for samplingvarious forms of wool, the reduction of the sample to small test1This test method is under the jurisdiction of ASTM Committee D13 on Textilesand is the direct responsibility of Subcommit
12、tee D13.13 on Wool and Felt.Current edition approved July 1, 2018. Published August 2018. Originallyapproved in 1999. Last previous edition approved in 2010 as D6466 10. DOI:10.1520/D6466-10R18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at s
13、erviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Federal Register, Vol 30, No. 161, Aug. 20, 1965, pp. 1082910833.5Federal Register
14、, Vol 33, No. 248, Dec. 21, 1968, pp. 1907319076.6International Wool Textile Organization, International Wool Secretariat, Com-mercial Development Department, Valley Drive, Ilkley, LS298PB, England.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Un
15、ited StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barrie
16、rs to Trade (TBT) Committee.1specimens, and measurement of the diameter of a number offibers from the test specimens using the Laserscan. Snippetscut from the various forms of wool are cleaned where required,and dispersed in a mixture of isopropanol and water. Thesuspension of snippets is transporte
17、d through a measuring cellwhich is positioned in a beam of laser light. The reduction inintensity of the laser beam as the individual snippets passthrough the beam of light, approximately 500 m in diameter,is sensed by a detector and transformed, using a calibrationlook-up table, into a diameter in
18、micrometres. Each diametermeasurement is allocated to a diameter class, and when thespecified number of fibers has been measured, the classcontents are statistically analyzed to produce the mean andstandard deviation of fiber diameter for the specimen. Fulldistribution data are also available in the
19、 form of a printedhistogram.5. Significance and Use5.1 This test method is considered satisfactory for accep-tance testing of commercial shipments of wool and otheranimal fibers in raw and sliver form because current estimatesof between-laboratory precision are acceptable. In cases ofdisagreement ar
20、ising from differences in values reported by thepurchaser and the supplier when using this test method foracceptance testing, Test Method D2130 shall be used as areferee method.5.2 This test method may be used for determining compli-ance with average fiber diameter and diameter variation toassign gr
21、ades when determining conformance of shipments tomaterial specifications given in Specifications D2252, D2816,D3991, and D3992.5.3 The procedures for determining mean fiber diameter andstandard deviation of fiber diameter provided in this testmethod and in IWTO-12 are in essential agreement.6. Appar
22、atus and Materials6.1 Fiber Diameter Analyzer6Fig. 1, consisting of thefollowing:6.1.1 A means of transporting fiber snippets in anisopropanol/water mixture through a laser beam.6.1.2 A means of measuring the reduction of light intensityof the beam due to the passage of a snippet and converting this
23、to digital form.6.1.3 A system for discrimination against the measurementof fibers that do not properly intersect the beam and contami-nants such as fiber fragments, dirt, and vegetable matterparticles.6.1.4 A computing system to transform and collate results.6.2 Fiber Sectioning DeviceOne or more o
24、f the following:6.2.1 Guillotine7Fig. 2, having two parallel cutting edgesbetween 1.8 and 2.0 mm apart.6.2.2 Minicore7Fig. 3, a cylindrical sample holder, de-signed for large samples, in which a sample is manually packedand a coring head which is driven pneumatically into thesample. The sample is co
25、mpacted by a spring-loaded platenand 6 minicore tubes with 2-mm diameter tips pass throughperforations in the platen when the force supplied by thepneumatic cylinder exceeds the force (300 N) from thepreloaded spring. At the end of the stroke, the cutting tips havepenetrated to within 0.5 mm of the
26、base of the sample holder.The sample collected by the minicore tubes is automaticallyexpelled into a collection device upon retraction of the coringhead.7Sirolan-Laserscan analyzer, minicorer, and guillotine obtainable from LoptexS.r.l., Via L. Leoni 20, 2210 0 COMO (Italia). Tel: 39 31 273502; Fax:
27、 39 1 273255.If you are aware of alternative suppliers, please provide this information to ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.FIG. 1 Block Diagram of Laserscan SystemD6466 10 (2018)
28、26.2.3 Heavy-Duty Sectioning Device8Fig. 4, comprised ofa metal plate with slot and compressing key, and equipped witha propulsion mechanism by which the fiber bundle may beextruded for sectioning. The device is designed to hold a sliverof top or equivalent bulk of fibers.6.3 Box for Compressing Loo
29、se FibersA box, 300 by 150by 375 mm deep in inside dimensions, equipped with floatingtop which has 16 randomly spaced holes 20 mm in diameterover its area. The sample may be firmly compressed byapplying pressure on the top. The top is held in place by tworods extending through holes in the side of t
30、he box and over thetop. The coring tube is thrust through the holes in the top toobtain a sample.6.4 Pressure Coring Tube9A 13-mm inside-diametermetal tube, approximately 760 mm long, reamed and tapped onone end to hold a sharp 10 or 13-mm diameter cutting tip. Thetube is fitted with a “T” cross bar
31、 about 500 mm long.6.5 Core ExtruderA 6-mm wood dowel or aluminum rodslightly longer than the coring tube to push the sample from thetube.6.6 Apparatus for Measuring the Water Content of Isopro-panol.6.6.1 Hydrometer, for the range density from 0.800 to 0.900Mg/m3and calibrated in accordance with Te
32、st Method E126.6.6.2 Thermometer, for the range from 0 to 50C andcalibrated in accordance with Guide E1750.6.7 Calibration Standards, for instrument calibration.6.7.1 Current Interwoollabs III Standard Tops, for wood.106.7.2 Current International Mohair Association StandardTops, for mohair.117. Reag
33、ents7.1 The following reagents are used:7.1.1 Water, distilled, or equivalent.7.1.2 Alcohol, isopropyl (CH3CH2CH2OH).7.1.3 Petroleum Spirit, boiling range from 40 to 70C, forcleaning sliver subsamples.7.1.4 1,1,1 Trichlorethane (CH3CCl3), for cleaning sliversubsamples.8. Hazards8.1 Refer to the manu
34、facturers material safety data sheet(MSDS) for information on handling, storage, use, and dis-posal of chemicals used in this test method.9. Sampling9.1 Loose FibersThe test method for obtaining a repre-sentative sample of wool differs according to circumstances.The sampling procedures and major cir
35、cumstances encoun-tered are as follows:9.1.1 Lots of Packaged, Grease, Pulled, or Scoured WoolTake core samples in accordance with Practice D1060. Cleanor scour the raw wool sample in accordance with Test MethodD584. If a representative portion of the scoured wool coresample resulting from the test
36、for clean wool fiber present isavailable, it may be used for fiber diameter determination. Ifcore sampling is not feasible, take at random, by hand, at least50 handfuls of wool from not less than 10 % of the packages.The aggregate mass of the sample shall be at least 1.5 kg.9.1.2 Major SortPackaged
37、grease wool in fleece fromwhich a diameter test is needed, hand sample by drawing oneor more handfuls of wool from the major sort portion of at least50 fleeces taken at random from the lot. The aggregate mass ofthe sample shall be at least 1.5 kg.9.1.3 Piles of Graded or Sorted WoolSample piles ofgr
38、aded or sorted wool by taking from random locations in thepile at lease 50 handfuls of wool, the aggregate mass of whichshall be at least 1.5 kg. If the wool is in fleece form and a testis needed for only the major sort, take the sample in accordancewith 9.1.2.9.1.4 Card SliverSample the wool card s
39、liver by drawingten 600-mm lengths at random from the lot, preferably duringthe carding operation.9.1.5 TopSample the top by drawing from each 9000 kg orfraction thereof, four sections of sliver, each of which shall beat least1minlength and taken from different balls of topselected at random. Take o
40、nly one ball from any one bale orcarton. For broken top, take an equivalent aggregate length ofsliver at random.8Obtainable from MICO Instruments, 1944 Main St., P.O. Box 451, MarshfieldHills, MA 02051-0451. If you are aware of alternative suppliers, please provide thisinformation to ASTM Internatio
41、nal Headquarters. Your comments will receivecareful consideration at a meeting of the responsible technical committee,1whichyou may attend.9Obtainable from Yocom-McColl Testing Laboratories, Inc., 540 West ElkPlace, Denver, CO 80216 andAcroAssociates, Inc., 163 Merrimac St., Woburn, MA01801. If you
42、are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.10Available from Interwoollabs Secretariat, Boit 14, Rue du Luxembourg 19
43、/21,1040 Brussels, Belgium.11Available from International Mohair Association, Mohair House, 68 TheGrove, Ilkley, West Yorkshire, LS29 9PA, England, U.K.FIG. 2 GuillotineD6466 10 (2018)310. Test Samples and Test Specimens, Number andPreparation10.1 Test Samples (one from each laboratory sampling unit
44、):10.1.1 Grease Wool, Pulled Wool, and Scoured Wool:10.1.1.1 Sub-CoringRandomly pack the core or handsample (see 9.1.1, 9.1.2, and 9.1.3), into a suitable container(see 6.3) and compress to approximately 14 kPa by loading aweight of 667 N on the floating top. By means of a pressurecoring tube (6.4)
45、extract at least five cores to provide a testspecimen of at least 20 g of scoured wool. Scour or otherwiseclean the test specimen in accordance with Test Method D584if it is grease wool or pulled wool.10.1.1.2 Gridding, Core Test ResidueIf the sample com-prises an adequate amount of scoured wool res
46、ulting from coretesting a lot for clean wool fiber present (see 9.1.1), divide thesample into 40 portions of approximately equal size. Fromeach portion, draw at random at least 0.5 g. Mix or blend these40 portions to form the test specimen.10.1.1.3 Gridding and Machine BlendingFor samplesother than
47、those specified in 10.1.1 and 10.1.2, divide thesample into 40 portions of approximately equal size. Fromeach portion draw at random a sufficient quantity of fiber toprovide a clean test specimen of 20 g. Scour or otherwise cleanthe specimen of grease or pulled wool.10.1.2 Card SliverStrip off porti
48、ons of each of the ten600-mm lengths of sliver (see 9.1.4). Combine these portionsto form a composite sliver about 600 mm in length. Thisconstitutes the test specimen.10.1.3 TopEach of the four sections of sliver comprisingthe sample (see 9.1.5) constitutes a test specimen.10.2 Test Specimens:10.2.1
49、 Test one test specimen from each bulk subsample andtwo specimens from each sliver and top subsample. Prepareapproximately 0.3 g test specimens by cutting enough fibersnippets to measure the diameters of 2000 fiber segments foreach test specimen measured. Obtain snippets using a minicore(10.2.1.1) or guillotine (10.2.1.2). Where required to achievethe necessary quantity of snippets, combine snippets from onesliver subsample or bulk subsample to form the test specimen.10.2.1.1 Minicore (Applicable to Raw Wool, Card Sliver, orTop)Minicore each sliver subsa
