1、Designation:D249707(Reapproved 2018)Standard Tolerances forManufactured Organic-Base Filament Single Yarns1This standard is issued under the fixed designation D2497;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.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 These tolerances cover first-quality,manufactured,organic-base filament single yarns(namely,bright,semi-dull,dull,solution-dyed,ble
3、ached,unbleached,etc.)regardless ofthe package type.These tolerances cover permissible varia-tions in linear density,tenacity,elongation,twist,and commer-cial weight.1.1.1 These tolerances do not apply to rubber yarns,span-dex yarns,metal-covered yarns,nor to bulk yarns since testmethods for these t
4、ypes of yarn are not available.Thesetolerances do not apply to industrial filament yarns.NOTE1Tolerances for inorganic glass yarns are given in Specifica-tions and Methods D578/D578M.1.2 This standard covers only tolerances.It does not coverspecifications or quality levels,for yarns to be used for a
5、nypurpose.Specifications for specific properties are subject toagreement by the purchaser and the supplier.NOTE2While the tolerances specified may be applied to yarn takenfrom fabric,the properties of such yarns will likely differ from the originallevel.1.3 This standard does not purport to address
6、all of thesafety concerns,if any,associated with its use.It 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 a
7、ccor-dance with internationally recognized principles on standard-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
8、 Standards:2D123 Terminology Relating to TextilesD578/D578M Specification for Glass Fiber StrandsD1423/D1423M Test Method for Twist in Yarns by Direct-CountingD1907/D1907M Test Method for Linear Density of Yarn(Yarn Number)by the Skein MethodD2256_D2256 Test Method for Tensile Properties of Yarnsby
9、the Single-Strand MethodD2258/D2258M Practice for Sampling Yarn for TestingD2494 Test Method for Commercial Mass of a Shipment ofYarn or Manufactured Staple Fiber or TowD4849 Terminology Related to Yarns and Fibers3.Terminology3.1 For all terminology relating to D13.58,Yarns andFibers,refer to Termi
10、nology D4849.3.1.1 The following terms are relevant to this standard:tolerances.3.2 For all other terminology relating to textiles,refer toTerminology D123.4.Significance and Use4.1 These tolerances may be used as a guide in purchaser/supplier disputes,or to assist in assigning nominal values forlin
11、ear density and twist.The tolerances listed for each propertyrepresent the maximum variations deemed acceptable in thetrade.5.Test Methods5.1 Take a sample of yarn as directed in Practice D2258/D2258M.Make the indicated tests as directed in Test MethodD1907/D1907M for Yarn Number,Test Method D1423/D
12、1423M for Direct Twist,Test Method D2256_D2256 forSingle Strand Breaking Strength,and Test Method D2494 forCommercial Mass.6.Tolerances6.1 Linear DensityThe average linear density shall con-form to the average linear density agreed upon between thepurchaser and the supplier with the tolerances speci
13、fied inTable 1.6.2 StrengthThe average breaking force of the yarn deter-mined in single strand tests or the average force at a specificlevel of elongation,in each packing case of ten or more yarn1These tolerances are under jurisdiction of ASTM Committee D13 on Textilesand are the direct responsibili
14、ty of Subcommittee D13.58 on Yarns and Fibers.Current edition approved July 1,2018.Published July 2018.Originally approvedin 1963 replacing D1235,D1236,and D1237.Last previous edition approved in2012 as D2497 07(2012).DOI:10.1520/D2497-07R18.2For referenced ASTM standards,visit the ASTM website,www.
15、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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis internation
16、al 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 Barriers to Trade(TBT)Committee.1 packages or on a beam,shall be equal to or exceed thepreviously agreed upon level.6.3 ElongationThe average elongation of the yarn at thebreaking force or at a specified force,in each packing case oft
