Designation:D5344−99(Reapproved2011)StandardTestMethodforExtensionForceofPartiallyOrientedYarn1ThisstandardisissuedunderthefixeddesignationD5344;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofextensionforcedevelopedwhiledrawingapartiallyorientedfilamentyarnbetweenpairsofdrawrollsofdifferentsurfacespeeds.1.2Extensionforceprovidesanestimateoftheyarnorien-tation.1.3Thistestmethodappliestopartiallyorientedfilamentyarnslessthan33.3tex(300denier),butitcanbeusedforhigherdeniersbyapplyingthetestconditionsasdirectedinAppendixX1.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1776PracticeforConditioningandTestingTextilesD2258PracticeforSamplingYarnforTestingD2904PracticeforInterlaboratoryTestingofaTextileTestMethodthatProducesNormallyDistributedData(With-drawn2008)3D2906PracticeforStatementsonPrecisionandBiasforTextiles(Withdrawn2008)33.Terminology3.1Definitions:3.1.1drawratio(DR),n—therelationofthefinallengthperunitmasstooriginallengthperunitmassofamaterialresultingfromdrawing.3.1.2drawtexturing,n—forprocessingthermoplasticfibers,thesimultaneousorsequentialprocessofdrawingandimpartingcrimp,thusproducingincreasedmolecularorienta-tionandincreasedbulk.3.1.2.1Discussion—Thedrawingandtexturingstagesmayoccurinseparate,usuallyconsecutive,zonesofamachine(sequentialdrawtexturing)ortogetherinthesamezone(simultaneousdrawtexturing).3.1.3drawing,n—intextilepr...
