粘接技术原理(Converter)

3M3MAdhesionAdhesionCohesionCohesionABAB1)2)TensileShear3)4)•CleavagePeel•AdhesiveFailureSubstrateFailureCohesiveFailure?(or)1.(,,,)2.(,,,,)3.(,,,PH,)4.(,)5.(,,,)1.2.&3.4.SurfaceEnergy•(,,).SurfaceEnergyHighSurfaceEnergyHighSurfaceEnergyHighSurfaceEnergy()Easy-to-adhereMetalsMetalsPolycarbonatePolycarbonatePolyesterPolyesterPVCPVCPolyurethanePolyurethanePolyethylenePolyethylenePolystyrenePolystyrenePolypropylenePolypropyleneTeflonTeflonLowSurfaceEnergyLowSurfaceEnergyLowSurfaceEnergy()Hard-to-adhere•Copper1103•Aluminum840•Zinc753•Tin526•Lead453Dynes/cm•50-KeptonPolyimide•46-NylonHexamethyleneAdipamide•43-PolyesterPolyethyleneTerephthalate•43-EstanePolyurethane•42-BakelitePhenoxy•42-LexanPolycarbonate•42-ABSAcrylonitrileButadieneStyrene•41-Polysulfone•40-SaranVinylideneChloride•39-PVCPolyvinylChloride•39-NorylPolystyrenePhenoloxide•38-AcrylicPolymethyleMethacrylate•37-PVAcPolyvinylacetate•37-PVAPolyvinylAlcohol•36-PSPolystyrene•36-DelrinAcetal•33-ELVAXEthyleneVinylAcetate•31-PEPolyethylene•29-PPPolypropylene•28-TEDLARPolyvinylFlouride•28-VinylButyral•24-SILICONEDimethyleSilicone•18-TEFLONTetrafluoroethyleneLiquidLiquidDynes/cmDynes/cm?•Time••Temperature••••Pressure•••?••••••1.2.a-PISBS3.4799479947999090CC&&&,,260260CC008620086200862,300,300CC•-----/•-----/•-----//•-----•-----•Ensureweakestlinkinanadhesivejointiswithintheadhesiveandnotatitsinterface•Prefercohesivefailure(GLOSSARY)•(WORKLIFE)•230C,20Approximatetimefora20gramquantityofmixedresinat230Ctoremainworkable•(SETTIME)Thetimenecessarytoobtainahard,tackfreesurface.(GLOSSARY)•(HANDLINGSTRENGTH)•50PSIThetimeittakestoreach50PSIinoverlapshear•(FULLCURE)•100%Timerequiredtoreach100%oftheultimatestrengthofaproductPeelvsShearTestPeelmeasuresAdhesionPeelPeelmeasuresmeasuresAdhesionAdhesionShearmeasuresCohesionShearShearmeasuresmeasuresCohesionCohesion(DynamicPeelAdhesion)----,•Forcerequiredtopeelstandardareaoftapefromatestpanelatspecificangleandconstantspeed•Variables•Speed•TestPanelMaterialandSurfaceConditions•Temperature180oPeel180180ooPeelPeel90oPeel9090ooPeelPeel(StaticShearStrength)-----,•Timerequiredtoshearadefinedareaoftapefromatestpanelatconstantload•Variables•Load•TestPanelMaterialandSurfaceConditions•TemperatureLoadLoadLoadTapeTapeTapeTestPanelTestTestPanelPanel