Designation:D3236−15StandardTestMethodforApparentViscosityofHotMeltAdhesivesandCoatingMaterials1ThisstandardisissuedunderthefixeddesignationD3236;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheappar-entviscosityofhotmeltadhesivesandcoatingmaterialscompoundedwithadditivesandhavingapparentviscositiesupto200000millipascalsecond(mPa·s)(Note3)attemperaturesupto175°C(347°F).NOTE1—Althoughprecisionhasnotbeenstudied,thisproceduremaybeadaptabletoviscositieshigherthanthepresent200000mPa·slimitandtemperaturesabove175°C(347°F).Equipmentdescribedinthistestmethodpermitstestingofmaterialshavingviscositiesashighas16×106mPa·sandprovidestemperaturesupto260°C(500°F).NOTE2—Forpetroleumwaxesandtheirblendshavingapparentviscositiesbelow15mPa·s,TestMethodD445isespeciallyapplicable.NOTE3—Onepascalsecond(Pa·s)=1000centipoise(cP);onemilli-pascal-second=onecentipoise.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)3.Terminology3.1Definitions:3.1.1apparentviscosity—theviscositydeterminedbythistestmethodandexpressedinmillipascalseconds.Itsvaluemayvarywiththespindleandrotationalspeedselectedbecausemanyhotmeltsarenon-Newtonian.3.1.2viscosity—theratioofshearstresstoshearrate.Theviscosityofaliquidisameasureoftheinternalfrictionoftheliquidinmotion.Theunitofdynamicviscosityisthepascalsecond.ForaNewto...
