1、Designation:D333307(Reapproved 2012)Standard Practice forSampling Manufactured Staple Fibers,Sliver,or Tow forTesting1This standard is issued under the fixed designation D3333;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、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 practice covers a procedure for the division ofshipments of manufactured staple fiber,sliver(or top)or towinto lots
3、 and the sampling of such lots for testing.NOTE1For sampling yarns,refer to Practice D2258.NOTE2This practice differs from BISFA2rules for staple fibers in thelot sampling,by the elimination of separate sampling of outer versus innercontainer areas,in the reduction of number of strata from 6 to 5,an
4、d bythe elimination of compositing to obtain a single laboratory sample for thelot when testing properties which do not depend on as-received moisturecontent.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of
5、this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D123 Terminology Relating to TextilesD2258 Practice for Sampling Yarn for TestingD4271 Practice for Writing Statements
6、 on Sampling in TestMethods for Textiles(Withdrawn 2009)4D4849 Terminology Related to Yarns and Fibers3.Terminology3.1 For all terminology relating to D13.58,Yarns andFibers,refer to Terminology D4849.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Summary of Practice4.1
7、 Instructions are given for dividing containers into lots,for determining the number of containers to be selected fromeach lot as the lot sample,and for determining the number ofcontainers taken from the lot sample as a laboratory sample.See Practice D4271.4.2 Separate laboratory samples are taken f
8、or commercialweight measurement and for other testing,for example,physi-cal or chemical tests.4.3 The manner of preparing laboratory sampling units forcommercial weight,and the manner of collecting laboratorysampling units for other testing are based on the following:4.3.1 Present knowledge of the s
9、ystematic variation ofmoisture within the container,and4.3.2 The variability of the properties for which the practiceis to be used.5.Significance and Use5.1 Assigning a value to any property of the material in acontainer or in a lot,consignment,or delivery involves ameasurement process that includes
10、 both sampling and testingprocedures.The correctness of the value assigned dependsupon the variability due to testing.Even when the variabilitydue to testing is minimized by carefully developed procedures,correct and consistent estimates of the true value of theproperty are possible only when the sa
11、mpling procedure avoidssystematic bias,minimizes variations due to sampling,andprovides a laboratory sample of adequate size.5.2 This practice may not give the most efficient samplingplan that might be devised in special situations but it doespresent a general procedure that gives satisfactory preci
12、sionwith an economical amount of sampling and one which doesnot require elaborate statistical computation based on previousknowledge of the amount of variation between lot samples,between laboratory samples,and between test specimens.5.3 The smallest number of specimens required for a givenvariabili
13、ty in the average result will usually be obtained by(1)minimizing the number of shipping units in the lot sample,(2)1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved July 1,201
14、2.Published August 2012.Originallyapproved in 1974.Last previous edition approved in 2007 as D3333 07.DOI:10.1520/D3333-07R12.2BISFA Internationally Agreed Methods for Testing Polyamide Staple Fibers,1974 edition,BISFA Internationally Agreed Methods for Testing Polyester StapleFibers,1972 edition,an
15、d BISFA Rules for Testing Regenerated Cellulose andAcetate Staple Fibers,1970 edition,available from the Bureau International pour laStandardisation de la Rayonne et des Fibres Synthetiques.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servicea
16、stm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 taking one of the shipping units in the laboratory sample,and(3)taking the prescribed specimen(s)from the selected labo-ratory sample shipping unit.(See 7.3 and 7.4.)5.4 To minimize
