Designation:D3111−19StandardPracticeforFlexibilityDeterminationofHot-MeltAdhesivesbyMandrelBendTest1ThisstandardisissuedunderthefixeddesignationD3111;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthedeterminationoftheflexibilityofahot-meltadhesiveinsheetformunderspecifictestconditions.Thisisaworkingpractice.Itsresultsareusefulforcomparingadhesives,notforabsolutecharacterizationofadhesives.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D907TerminologyofAdhesivesE171/E171MPracticeforConditioningandTestingFlexibleBarrierPackaging3.Terminology3.1Definitions—ManyofthetermsfoundinthispracticearedefinedinTerminologyD907.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1flexibility,n—thatpropertyofamaterialbyvirtueofwhichitmaybeflexedorbowedrepeatedlywithoutundergo-ingrupture.4.SummaryofPractice4.1Teststripsofahot-meltadhesive,properlysizedandconditioned,arebent180°overamandrel(rod).Usingafreshspecimenforeachtest,thetestisrepeatedwithsmallerdiametermandrelsuntiltheadhesivefailsonbending.Theflexibilityoftheadhesiveisthesmallestdiametermandreloverwhichfouroutoffivetestspecimensdonotbreak.5.SignificanceandUse5...
