Designation:D3111−10StandardTestMethodforFlexibilityDeterminationofHot-MeltAdhesivesbyMandrelBendTestMethod1ThisstandardisissuedunderthefixeddesignationD3111;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheflex-ibilityofahot-meltadhesiveinsheetformunderspecifictestconditions.Thisisaworkingtest.Itsresultsareusefulforcomparingadhesives,notforabsolutecharacterizationofadhesives.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D907TerminologyofAdhesivesE171PracticeforConditioningandTestingFlexibleBarrierPackaging3.Terminology3.1Definitions—ManyofthetermsfoundinthistestmethodaredefinedinTerminologyD907.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1flexibility,n—thatpropertyofamaterialbyvirtueofwhichitmaybeflexedorbowedrepeatedlywithoutundergo-ingrupture.4.SummaryofTestMethod4.1Teststripsofahot-meltadhesiveproperlysizedandconditioned,arebent180°overamandrel(rod).Usingafreshspecimenforeachtest,thetestisrepeatedwithsmallerdiametermandrelsuntiltheadhesivefailsonbending.Theflexibilityoftheadhesiveisthesmallestdiametermandreloverwhichfouroutoffivetestspecimensdonotbreak.5.SignificanceandUse5.1The“MandrelBend”testissimpleandfast.Itrequireslittleinvestmentinequipmentandlittleoperatortraining.Theprimepurposeistodeterminewhetherahot-meltadhesivemeetsflexibilityrequirements.Thistestisalsousefulforcomparingflexibilityofseveraladhesives.Itcanbeusedtodesignadhesivesbycomparingtheflexibil...
