Designation:D7983−17StandardTestMethodforShrinkageofCarpetBackingFabrics1ThisstandardisissuedunderthefixeddesignationD7983;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheprocedureforevaluatingshrinkage,inbothwetanddryconditions,ofwoven,knittedandnonwovenbackingfabricsdesignedforuseinthemanu-factureofpileyarnfloorcoverings.DeterminationofcarpetbackingshrinkagewaspreviouslycontainedwithinTestMeth-odsD2646.Forconsistency,SubcommitteeD13.21extractedthisportionandcreatedaseparatetestmethod.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesaremathemati-calconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1776PracticeforConditioningandTestingTextilesD2646TestMethodsforBackingFabricCharacteristicsofPileYarnFloorCoveringsD5684TerminologyRelatingtoPileFloorCoveringsE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethods3.Terminology3.1FordefinitionsoftermsrelatingtoPileFloorCoverings,D13.21,refertoTerminologyD5684.3.1.1Thefollowingtermsarerelevanttothisstandard:backingfabric,nonwovenfabric,shrinkage.3.1.2Forallotherterminologyrelatedtotextiles,refertoTerminologyD123.4.SummaryofTestMethod4.1HOTWETProcedure—Thebackingfabricisfirstmea-suredtoaspecificlengthineachprincipledirection.Thefabricthenisimmersedinhotdistilledordeionizedwater,dried,andremeasured.Theshrinkageiscalculatedasthechangeinlengthexpressedasapercentageofthelengthbeforeimmersion.4.2HOT...
