ASTM_D_1577_-_07_2012.pdf

Designation:D157707(Reapproved 2012)Standard Test Methods forLinear Density of Textile Fibers1This standard is issued under the fixed designation D1577;the number immediately following the designation indicates the year oforiginal adoption or,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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 These test methods cover the measurement of mass perunit length(linear density)of textile fibers and filaments.Direct weighing and vibroscope procedures with modificationsfor crimped and uncrimped fibers are included.The optionsand sections are listed below.OptionSectionsAFiber Bundle Weighing7 15BSingle-Fiber Weighing16 23CVibroscope,General24 3035 and 36C1Uncrimped Fibers31 and 32C2Crimped Fibers33 and 34Precision and Bias37 and 38NOTE1For linear density of short lengths of yarn,refer to TestMethod D1059.For cotton linear density,refer to Test Methods D1769andD2480.For measurement of wool diameter,refer to Test Methods D1282,D2130 and D3510.1.2 The crimp,taper and cross-sectional shape of the fibermay influence the linear density measured by single-fiberweighing and vibroscope.1.3 These test methods measure the linear density of fiberswith moisture in equilibrium with the standard atmosphere fortesting textiles.The fiber moisture under these conditions is notnecessarily the same as the commercial moisture regain for thefibers.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the two systems may result in nonconformance with thespecification.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of 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:2D123 Terminology Relating to TextilesD629 Test Methods for Quantitative Analysis of TextilesD1059 Test Method for Yarn Number Based on Short-Length Specimens(Withdrawn 2010)3D1282 Test Method for Resistance to Airflow as an Indica-tion of Average Fiber Diameter of Wool Top,Card Sliver,and Scoured WoolD1769 Test Method for Linear Density of Cotton Fibers(Array Sample)(Withdrawn 1988)3D1776 Practice for Conditioning and Testing TextilesD1907 Test Method for Linear Density of Yarn(Yarn Num-ber)by the Skein MethodD2130 Test Method for Diameter of Wool and OtherAnimalFibers by MicroprojectionD2257 Test Method for Extractable Matter in TextilesD2258 Practice for Sampling Yarn for TestingD2480 Test Method for Maturity Index and Linear Densityof Cotton Fibers by the Causticaire Method(Withdrawn1992)3D2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data(With-drawn 2008)3D3333 Practice for Sampling Manufactured Staple Fibers,Sliver,or Tow for TestingD3510 Test Method for Diameter of Wool and OtherAnimalFibers by Image Analyzer(Withdrawn 1986)3D4849 Terminology Related to Yarns and FibersD5103 Test Method for Length and Length Distribution ofManufactured Staple Fibers(Single-Fiber Test)1These test methods are under the jurisdiction of ASTM Committee D13 onTextiles and are the direct responsibility of Subcommittee D13.58 on Yarns andFibers.Current edition approved July 1,2012.Published August 2012.Originallyapproved in 1958.Last previous edition approved in 2007 as D1577 07.DOI:10.1520/D1577-07R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.2 ASTM Adjuncts:TEX-PAC43.Terminology3.1 For all terminology relating to D13.58,Yarns andFibers,refer to Terminology D4849.3.1.1 The following terms are relevant to this standard:effective fiber length,fundamental resonant frequency,lineardensity for fiber and yarn,tex.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Significance and Use4.1 Option A for bundle weighing of Test Method D1577 isused in the trade for acceptance testing of commercial ship-ments.Option B for single-fiber weighing and Option C for thevibroscope may be used for acceptance testing(see Section37);however,caution is advised when using Option B orOption C because between-laboratory precision information isincomplete.Comparative tests as directed in 4.1.1 may beadvisable.4.1.1 I