ASTM_D_2594_-_04_2012.pdf

Designation:D259404(Reapproved 2012)Standard Test Method forStretch Properties of Knitted Fabrics Having Low Power1This standard is issued under the fixed designation D2594;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.1.Scope1.1 This test method covers the measurement of fabricstretch and fabric growth of knitted fabrics intended forapplications requiring low-power stretch properties.1.2 This test method includes procedures for fabric growthand stretch and can be used individually when required byindividual specifications.1.3 This test method is not applicable to fabrics intended forsupport or other applications requiring high-power stretchproperties.NOTE1For information on testing high-power and woven stretchfabrics,refer to Test Methods D3107 and D6614.1.4 The values stated in either SI or inch-pound units are tobe regarded separately as the standard.Within the text,theinch-pound units are shown in parentheses.The values statedin each system are not exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the specification.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 TextilesD1776 Practice for Conditioning and Testing TextilesD2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data(With-drawn 2008)3D2906 Practice for Statements on Precision and Bias forTextiles(Withdrawn 2008)3D3107 Test Methods for Stretch Properties of Fabrics Wo-ven from Stretch YarnsD4849 Terminology Related to Yarns and FibersD4850 Terminology Relating to Fabrics and Fabric TestMethodsD6614 Test Method for Stretch Properties of Textile Fabrics CRE Method3.Terminology3.1 Definitions:3.1.1 For definition of textile terms used in this test method:bench marks,refer to Terminology D4849.3.1.2 For definitions of textile terms used in this testmethod:fabric growth;fabric stretch;low-power stretch andtension,refer to Terminology D4850.3.1.3 For definitions of other textile terms used in this testmethod,refer to Terminology D123.4.Summary of Test Method4.1 Fabric GrowthBench marks of a known distance aremade on a fabric specimen.A specified tension is applied to afabric specimen by a prescribed cycling technique.The tensionis removed and after several specific recovery times under zerotension,the distance between the bench marks is remeasuredafter each time interval.The fabric growth is calculated fromthe length difference between the bench marks prior to appli-cation of the tension and after each respective recovery timeinterval.4.2 Fabric StretchBench marks of a known distance aremade on a fabric specimen.A specified tension is applied to afabric specimen by a prescribed cycling technique and theresulting distance between the bench marks measured.Thefabric stretch is calculated from the length difference betweenthe bench marks prior to application of the tension and underwhile under the tension.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.59 on Fabric Test Methods,General.Current edition approved July 1,2012.Published August 2012.Originallyapproved in 1969.Discontinued November 1997 and reinstated as D2594 99.Lastprevious edition approved in 2008 as D2594 04(2008)2.DOI:10.1520/D2594-04R12.2For 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 5.Significance and Use5.1 This test method specifies test conditions for measuringthe fabric growth and fabric stretch of knitted fabrics intendedfor use in swimwear,anchored slacks,and other form-fittingapparel(also commonly known as semi-support apparel)applications,as well as test conditions for measuring the fabricgrowth of knitted fabrics intended for use in sportswear andother loose-fitting apparel(also commonly known as comfortstretch apparel)applications.The applicability of this testmethod to the measurement of fabric growth and fabric stretchof knitted fabrics intended for use in slacks,sport coats,andsuits has not been determined.5.2 This test method is not