Designation:D2979−16StandardTestMethodforPressure-SensitiveTackofAdhesivesUsinganInvertedProbeMachine1ThisstandardisissuedunderthefixeddesignationD2979;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversmeasurementofthepressure-sensitivetackofadhesives.Thistestmethodisapplicabletothoseadhesiveswhichformabondofmeasurablestrengthrapidlyuponcontactwithanothersurfaceandwhichcanberemovedfromthatsurfacecleanly,thatis,withoutleavingaresiduevisibletotheeye.Forsuchadhesives,tackmaybemeasuredastheforcerequiredtoseparateanadhesiveandtheadherendattheinterfaceshortlyaftertheyhavebeenbroughtintocontactunderadefinedloadofknowndurationataspecifiedtemperature.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D907TerminologyofAdhesivesE4PracticesforForceVerificationofTestingMachinesE171PracticeforConditioningandTestingFlexibleBarrierPackaging3.Terminology3.1Definitions—ManytermsinthistestmethodaredefinedinTerminologyD907.4.SummaryofTestMethod4.1Thistestmethodinvolvesbringingthetipofacleanedprobeofdefinedsurfaceroughnessintocontactwiththeadhesiveatacontrolledrate,underafixedpressure,forashorttime,atagiventemperature;andsubsequentlybreakingthebondformedbetweentheprobeandadhesive,alsoatacontrolledrate.Tackismeasuredasthemaximumforcerequiredinbreakingtheadhesivebond.5.SignificanceandUse5.1Thistestmethodprovidesaquantitativemeasureofthepressure-sensitivetackoftheadhesive.5.2Themethodisdesignedfortheadhesivemassitselfandiss...
