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IdeasandapplicationsforDecoralSystemproductsTECHNICALTOOLSMRK-012-0086R1POWDER-COATINGANDHEAT-TRANSFERDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerials,andsubsequentdecorationInformation:1.
Versatilityofpowder-coatings2.
Techniqueforthepowder-coatingofglass3.
Heat-transferdecoration4.
Test5.
PossibleapplicationsPOWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerials1.
Versatilityofpowder-coatingsPowder-coatingsaredesignedfortheapplicationonconductivematerials,butwithaspecifictechniqueitispossibletousethemalsoonnon-conductivematerials,suchasglass,thusexpandingtheversatilityoftheseproductsandtheresultsthatwecanobtain.
Picture1-2:Someexampleofglasspaneldecoratedwithplotter2.
Techniqueforthepowder-coatingofglassa)PreparationAfterpreparationandcarefulcleaning(Picture5and6),thesampleishungwithahookorfirmlyplacedonametalrod,sothatwecanmoveitandputitintotheovenwithouttouchingitdirectly(Picture7).
Ifpossible,whenusinghooksorsimilarkindsofsupports,werecommendtoavoidanobliquepositioningofthesample:onceitisintheoven,thismaycausetheasymmetricflowingofthemeltpowder-coatingonthesurfaceofthesample.
Wealsorecommend,ifpossible,toavoidanasymmetriccontactofthemetalhook(orrod)onthesample:thismaycause,firstahigherelectrostaticattractionofthepowderparticlesonsomespotsoftheglassobject,secondlyafasterandeasiermeltingofthepowderduetothethermalconductivityofthemetalsupport.
Thiscanbepreventedbyusingsupportsmadeofnon-conductivematerials,andthatcanresistattemperatureshigherthanthecuringtemperature.
POWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerialsPicture3:glasssamplePicture4:protectionofthepartstoleftuncoatedPicture5:cleaningPicture6:preparationonthesupportforthepowder-coatingPOWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerialsb)Pre-heatingthesampleisputintotheovenat248°F-120°C(meltingtemperature):inthisway,thepowderwillsticktotheobjectasittouchesthehotglasssurface,duetoinstantaneousmelting.
Thewholeglasssamplemustbehot:forthisreason,thelongertheobjectwillremainintheoven,theeasierandthebetterwillresultthesubsequentapplicationofthepowder.
Approximately,thistimeshouldbeatleast5minutes,butitcanvarydependingonshapeanddimensionsofthespecificobject(largeglassbottlesmayrequire20minutesormore).
c)ApplicationWetakethesampleoutoftheovenandweimmediatelyspraythepowderonit.
Theapplicationiscarriedoutjustasfornormal(conductive)objects,butitwillresulteasyandhomogeneousaslongasthesampleishot;forthisreason,ithastobedonerapidly.
Thevoltagecanbesetat0V,sincethepowderdoesnotsticktothesampleforelectrostaticattraction.
Whilesprayingthepowder,we'llobserveitsinstantmeltingonthesample:itisnormal,butforpowder-coatingswithspecialsurfaceeffects(Saltlake,Icetouch.
.
.
)we'llseethecharacteristictexturedfinishonlyattheendofthecuringcycle.
Picture7and8:applicationofthepowder-coatingonthehotsampleAttention:incaseofdefects(dueforexampletodustfallenonthesample,orcontactwithotherobjectsthatspoilthelayerofthemeltpowder)itisnotpossibletoremovethesprayedpowderasinthecaseof"normal"application(oncoldconductiveobjects).
Everycontactwiththemeltpowderwillcompromisetheperfectionoftheresult.
POWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerialsd)CuringWeputthesampleintotheovenforthetimeandtemperaturesreportedontheTDSoftheproductused.
Picture9:thesampleinsidetheovenonitssupport,tocompletethecuringe)CoolingdownandcompletionThesampleispulledoutoftheoven;thehightemperaturecantemporarilyincreasethefragilityoftheglass,soithastobemovedcarefully.
Weletitcooldowntoroomtemperature.
Picture10and11:thesamplepowder-coatedwithGlass-003POWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerials3.
Heat-transferdecorationHeat-transfertechnologyallowstodecoratepowder-coatedobjectstoobtainwoodeffectfinishes,fancyeffects,ordifferentdecorativemotifs.
Hereisshowntheprocedureforthedecorationofglassbottles.
a)PreparationWiththeheat-transferfilmthatwehavechosenforthedecoration,wemakeabaglargeenoughtocontaintheobjecttodecorate:wecutasquareportionofthefilmandjointwooppositesidesofit(Picture13);thenwecloseoneremainingsidewithtape(Picture14),thusleavingonesideopentoinsertthebottle.
Picture12:powder-coatedsamplePicture13:filmclosedontherightsidePicture14:bag,closedonthethirdsidePicture15:samplereadytobeputintothebagPOWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerialsb)BaggingandvacuumingThebagcontainingtheobjectisclosedon"suctionheads"(picture17);theseheadswillmakethevacuuminsidethebag,sothefilmwillstrictlyadhereonthewholesurfaceofthesample:thiswillallowthecorrecttransferoftheinksintothelayerofpowder-coating.
Picture16:PreparationofthesamplesonthesupportPicture17:sampleinitsbag,closedonthe"suctionheads"c)Ovenandheat-transferprocessThesamplepreparedisputintotheovenat446°F-230°Cfor12minutes.
Afterthistime,theexhaustedfilmcanberemovedandthedecorationiscompleted.
Picture18:glassbottlesjustafterthesublimationintheovenPicture19:thesampledecorated.
POWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerials4.
TestAcross-cuttest(ENISO2409)wascarriedoutonstandardpowder-coatingproductsappliedonglass:-Smoothglossyfinish(DS804):gt=0;nolossofadhesion.
-Smoothmattfinish(DS408):gt=0;nolossofadhesion.
Theadhesionofthepowder-coatingsisregularandcomplianttothestandardsalsoonthiskindofmaterial.
Picture20:Cross-cuttestcarriedoutonaglassslidecoatedwithDS408Picture21:Cross-cuttestcarriedoutonaglassslidecoatedwithDS804POWDER-COATINGANDDECORATIONOFGLASSOBJECTSTechniqueforthepowder-coatingofnon-conductivematerials5.
PossibleapplicationsUsingthetechniqueillustratedinthistechnicaldocumentit'spossibletodecoratedahugerangeofglassobject.
Amazingresultscanbeachievedwithbottlesandroundshapes,thatmayvalorizethemetallizationandthereflectionoflightofmanypowder-coatings.
Picture22-23:Glassbottles,coatedwithGoldlook-001,Titanlook-001,Silverlook-001andSteelook-001.
Amazingeffectcanbeobtainedbymatchingthetransparencyoftheglasswithproductscharacterizedbylowhidingpower,thusconferringtotheglassobjectaspecialcolouroraspecialreflectionofthelightbutkeepingatthesametimethetranslucencythatistypicalofthismaterial.
Picture24:GlassjarscoatedwithGlass-001andGlass-003.
Ourspowder-coatingproductscanbedecoratedwithplotterpapertoobtainastonishingeffects,aswecanseeinthefollowingimages.
Picture25-26:GlasspanelcoatedandthendecoratedwithplotterpaperMarchidiqualitàregistratidiDecoralSystem:DECORALSYSTEMS.
R.
L.
VialedelLavoro,5-Arcole(VERONA)Italy-Tel.
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