Designation:D1146−00(Reapproved2013)StandardTestMethodforBlockingPointofPotentiallyAdhesiveLayers1ThisstandardisissuedunderthefixeddesignationD1146;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationoftheblock-ingpointofathermoplasticorahygroscopiclayerorcoatingofpotentiallyadhesivematerial.Potentiallyadhesivematerialscomprisethosematerialsinasubstantiallynonadhesivestatewhichmaybeactivatedtoanadhesivestatebyapplicationofheatorsolvents.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D907TerminologyofAdhesives3.Terminology3.1Definitions—ManytermsinthistestmethodaredefinedinTerminologyD907.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1adhesiveblocking,n—theblockingofapotentiallyadhesivefaceandastandardtestpaper.3.2.2blocking,n—theadhesionbetweentouchinglayersofsimilarordissimilarmaterial,suchasoccursundermoderatepressuresduringstorageoruse.3.2.3cohesiveblocking,n—theblockingoftwosimilar,potentiallyadhesivefaces.3.2.4criticalhumidity,n—thelowesthumidityatwhichblockingofagivendegreeoccurs.3.2.5criticaltemperature,n—thelowesttemperatureatwhichblockingofagivendegreeoccurs.3.2.6firstdegreeblocking,n—anadherencebetweenthesurfacesundertestofsuchdegreethatwhentheupperspecimenisliftedthelowerspecimenwillclingthereto,butmaybepartedwithnoevidenceofdamagetoeithersurface.3.2.7seconddegreeblocking,n—anadherenceofsuchdegre...
