1、Designation:D225902(Reapproved 2011)Standard Test Method forShrinkage of Yarns1This standard is issued under the fixed designation D2259;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 parenthese
2、s indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is used to determine the shrinkage ofyarns in skein form when treated in boiling water,dry heat,saturated steam,or solvents.This test method i
3、s applicable toyarns made from any fiber or combination of fibers where thetex of the yarn is known or can be determined.This test methodis not recommended for elastomeric yarns and those yarns thatstretch more than 5%under the tension loadings prescribed,although it has been used for the latter.NOT
4、E1Procedures for determining yarn shrinkage and bulk proper-ties of textured yarns are covered in Test Method D4031.1.2 This test method shows the values in both SI andinch-pound units.“SI”units is the technically correct name forthe system of metric units known as the International System ofUnits.“
5、Inch-pound”units is the technically correct name forthe customary units used in the United States.The values statedin either SI units or in other units shall be regarded as standard.The values expressed in each system may not be exactequivalents;therefore each system must be used independentlyof the
6、 other without combining in any way.1.3 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 limitat
7、ions prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1059 Test Method for Yarn Number Based on Short-Length Specimens(Withdrawn 2010)3D1776 Practice for Conditioning and Testing TextilesD1907 Test Method for Linear Density of Yarn(Yarn Num-ber)by the Skei
8、n MethodD2258 Practice for Sampling Yarn for TestingD3888 Terminology for Yarn Spinning SystemsD3990 Terminology Relating to Fabric DefectsD4031 Test Method for Bulk Properties of Textured YarnsD4848 Terminology Related to Force,Deformation andRelated Properties of TextilesD4849 Terminology Related
9、to Yarns and FibersE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 Definitions:3.1.1 For definitions of textile terms used in this testmethod:skein and skein loop-length,refer to TerminologyD4849.3.1.2 For definition of the term extension used in this testmetho
10、d,refer to Terminology D4848.3.1.3 For other textile terms used in this test method,refer toTerminology Standards,D123,D3888,D3990,D4848 andD4849.4.Summary of Test Method4.1 The loop length of a conditioned skein of yarn ismeasured under a specific tension,which is sufficient tostraighten but not st
11、retch the skein.The tension-free skein isthen immersed in boiling water or exposed to dry heat orsaturated steam or in the solvent reconditioned,and remea-sured.The shrinkage(or in some cases,growth)is calculated asthe change in length expressed as a percentage of the lengthbefore immersion or expos
12、ure.5.Significance and Use5.1 Test Method D2259 for testing yarn for shrinkage inboiling water,saturated steam,dry heat,or solvents is consid-ered satisfactory for acceptance testing of commercial ship-ments of yarn because the test method has been used exten-sively in the trade for that purpose.5.1
13、.1 If there are differences of practical significance be-tween reported test results for two laboratories(or more),comparative tests should be performed to determine if there isa statistical bias between them,using competent statistical1This test method is under the jurisdiction of Committee D13 on
14、Textiles and isthe direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved May 1,2011.Published June 2011.Originallyapproved in 1964.Last previous edition approved in 2006 as D2259 02(2006)1.DOI:10.1520/D2259-02R11.2For referenced ASTM standards,visit the ASTM websi
15、te,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
16、Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 assistance.As a minimum,use the samples for such compara-tive tests that are as homogeneous as possible,drawn from thesame lot of material as the samples that resulted in disparateresults during initial testing and randomly assigned in equalnumbers to each laboratory.The test results from the labora-tories involved should be compared using a statistical test forunpaired data,a probability level chosen prior to the testi
