碳胶-技术说明

SPICarbonPaintGeneralinformationforapplicationsoutsideofelectronmicroscopyIntroductionTheSPICarbonPaintproductisdesignedtoprovidecontrolledelectricalpropertiestoanotherwisenonconductivesurface.TheSPICarbonPaintproductisdesignedtoprovidehighlubricity,conductivity,andexcellentreleasepropertiestomanynonconductivesubstrates,includingmostplastics.Itismadefromadispersionofcolloidalgraphiteinanisopropanolsolutionwhichwillquicklyairdryonliterallyanysurfacetoformathinuniformadherentlayer.Ithasbeenformulatedinawaythatthedryingproductwillresistskinformation,whichshouldresultinadrytoplayerwithastillwetregionunderneath.Suchdryskin/residualwetregions,althoughthewetregionsdoeventuallydry,canresultinalayerofassymetricpropertiesandcharacteristics.TypicalApplications:PrintedCircuitsVacuumTubesBleedPathsLowNoiseCommunicationCablesHighResistanceCoatingonPlasticsStaticBleedShieldingImpregnationoffibersandpaperAnalyticalinstrumentationapplications(e.g.SEM/EDS)PhysicalProperties(assuppliedsuspension):Pigment:graphiteColor:blackBinder/thickener:cellulosicresinCarrier:Isopropanol稀释剂Diluent:SPICarbonPaintThinnerorisopropanolConsistency:liquidDensity:7.4lbs/gal(0.888kg/l)Weight%solids:20%Volume%solids:14%Flashpoint:52°F/11°CShelflife:6monthsfromdateoforiginalshipment,unopenedCoverage:225ft2/gal@1mil(5.524m2/l)VOC:710g/l(5.9lb/gal)TypicalProperties(CuredCoating):Color:matteblackCoefficientoffriction:0.15(static)Servicetemperature:150°F/65°CSheetresistance:1.2Kohms/sq@1mil(25µm)dryfilmthicknessElectricalPropertiesofCuredCoatingTheelectricalpropertiesofthefinalcuredcoatingcanbecontrolledbychangingthefilmthicknessasshownbelow:MethodofUse:SurfacePreparation:Substratestobecoatedmustbecleananddry.Asolventwipewithairdryisusuallysufficientforsmoothsurfaces.Forporoussurfaces,usethesameprocedurefollowbyheatingtodriveoffentrappedcontaminants,solventsormoisture.多孔的材料要烘干除去溶剂等；MixingandApplication:SPISuppliesCarbonPaintissuppliedinconcentratedform.Itisthixotropicinnatureandwillgeluponstanding.Preparationinvolvesthoroughagitationoftheconcentrate,thendilutionwithisopropanolorwithSPISuppliesCarbonPaintThinner.Theproductcanbeappliedbybrush,dip,rollerorspray.Alwaysagitatethoroughlyjustpriortouse.用前摇一摇。Acoatingthicknessof1mil(25µm)isbestbuiltupbytheapplicationoffiveseparatecoatsat0.2mil(5µm)thicknessbysprayapplication.Dilutionof1partbyvolumeofproductwith3partsbyvolumeofthinnerisnecessarytoobtainanadherentcoatingofthisthickness.Forsmallproductionworkandprototypes,asuctioncupgunmaybeused,providingthecarbonpaintisthoroughlymixedbeforesprayapplication.Forimmediateproductionrunsoralotofsmallparts,propeller-typeattachmentsshouldbeusedonthesuctionguntoensurecoatinguniformity.Fullproductionisbesthandledwithpropeller-agitatedpressurepotsystemsasthisprovidesthebestinapplicationefficiency.Toreduceoverspray,usetheminimumatomizationpressurerequiredforadequatecoverage.Curing:Thecoatingairdriestothetouchin5minutesandisreadytousein30minutes.Followingtheairdry,bakefor5minutesat167°F/75°Ctoachieveoptimumcoatingqualitiesinashortercuringtime.