1、Designation:D20402(Reapproved 2021)Standard Test Methods forSewing Threads1This standard is issued under the fixed designation D204;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 ind
2、icates 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 can be used to evaluate sewingthreads of any fiber.1.1.1 The
3、 test methods in this standard are intended toevaluate only sewing thread taken from thread holders.1.2 These test methods only provide for the measurement ofsewing thread physical properties.These test methods do notaddress any other properties that may be important for thesatisfactory performance
4、of sewing threads under particularend use conditions.1.3 These test methods can be used to measure the follow-ing properties:SectionsColorfastness to Drycleaning73 83Colorfastness to Laundering62 72Colorfastness to Water Migration84 94Diameter43 50Length per Thread Holder34 42Shrinkage,Single Strand
5、51 61Dry Heat58.1Boiling Water58.2Strength and Elongation15 21Single StrandConditioned19.1.1Single StrandWet19.1.2Loop Strength19.2Knot Strength19.3Twist22 27Twist Balance28 33Yarn Number7 14NOTE1For methods covering tests on prepared seams,refer to TestMethods D1683/D1683M and D3940.1.4 The values
6、stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.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
7、of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the
8、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 TextilesD1422/D1422M Test Method for Twist in Single
9、 SpunYarnsby the Untwist-Retwist MethodD1423/D1423M Test Method for Twist in Yarns by Direct-CountingD1683/D1683M Test Method for Failure in Sewn Seams ofWoven FabricsD1776/D1776M Practice for Conditioning and Testing Tex-tilesD1777 Test Method for Thickness of Textile MaterialsD1907/D1907M Test Met
10、hod for Linear Density of Yarn(Yarn Number)by the Skein MethodD2256/D2256M Test Method for Tensile Properties of Yarnsby the Single-Strand MethodD2258/D2258M Practice for Sampling Yarn for TestingD2724 Test Method for Bond Strength of Bonded,Fused,and Laminated Apparel FabricsD3693 Specification for
11、 Labeled Length per Holder ofSewing ThreadD3823 Practice for Determining Ticket Numbers for SewingThreadsD3940 Test Method for Bursting Strength(Load)and Elon-gation of Sewn Seams of Knit or Woven Stretch TextileFabrics(Withdrawn 1995)3D4848 Terminology Related to Force,Deformation andRelated Proper
12、ties of TextilesD4849 Terminology Related to Yarns and Fibers1These 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 1,2021.Published July 2021.Originally publishedas D20
13、4 24 T.Last previous edition approved in 2016 as D204 02(2016).DOI:10.1520/D0204-02R21.2For 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 pag
14、e 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 StatesThis international standard was developed in accordance with internationally recognized
15、 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.12.2 AATCC Standards:Test Method 135 Dimensional Changes in Automatic Hom
16、eLaundering of Woven and Knit Fabrics4Evaluation Procedure 1,Gray Scale for Color Change4Evaluation Procedure 3,Chromatic Transference Scale43.Terminology3.1 Definitions:3.1.1 Refer to Terminology D4848 for definitions of thefollowing terms used in this standard elongation;force andloop-breaking force.3.1.2 Refer to Terminology D4849 for definitions of thefollowing terms used in this standard colorfastness;coveredyarn,greige thread,growth,sew,sewing force,sewing thread,tex,thread holder,ticket n