NguLawrence (Larry) UVan Iseghem nguMongameli/i-CEO yeVan Technologies, Inc.
Ngexesha lokuqhuba ushishino nabathengi bemizi-mveliso kwihlabathi liphela, siphendule imibuzo emininzi emangalisayo kwaye sinikeze izisombululo ezininzi ezinxulumene neengubo ezinyangwa yi-UV. Oku kulandelayo zezinye zemibuzo edla ngokubuzwa rhoqo, kwaye iimpendulo ezihamba nazo zinokubonelela ngengcaciso eluncedo.
1. Zithini izinto zokugquma ezinyangekayo nge-UV?
Kwishishini lokugqiba imithi, kukho iintlobo ezintathu eziphambili zeengubo ezinyangekayo nge-UV.
I-100% esebenzayo (ngamanye amaxesha ibizwa ngokuba yi-100% ye-solids) ii-UV-medical coats zizinto ezenziwe ngeekhemikhali ezingamanzi ezingenaso nasiphi na isinyibilikisi okanye amanzi. Xa isetyenziswa, i-coating ichaphazeleka ngoko nangoko kumandla e-UV ngaphandle kwesidingo sokoma okanye ukutsha ngaphambi kokuba inyangwe. I-coating composition esetyenziswayo isabela ukuze yenze umaleko womphezulu oqinileyo ngenkqubo echaziweyo nebizwa ngokufanelekileyo ngokuba yi-photopolymerization. Ekubeni kungekho mphunga ufunekayo ngaphambi kokuba inyangwe, inkqubo yokufaka kunye nokunyanga isebenza kakuhle kwaye ixabisa kancinci.
Iingubo ze-UV ezinyangwa ngamanzi okanye ezithwalwa ngamanzi azinyibilikisi ngokuqinisekileyo ziqulathe amanzi okanye isinyibilikisi ukunciphisa umxholo osebenzayo (okanye oqinileyo). Oku kuncipha komxholo oqinileyo kuvumela ukuba kube lula ukulawula ubukhulu befilimu emanzi esetyenziswayo, kunye/okanye ukulawula ukuxinana kwengubo. Xa zisetyenziswa, ezi ngubo ze-UV zifakwa kwiindawo zomthi ngeendlela ezahlukeneyo kwaye kufuneka zomiswe ngokupheleleyo ngaphambi kokuba zinyangwe yi-UV.
Iingubo zomgubo ezinyangwa yi-UV nazo zizinto eziqinileyo eziyi-100% kwaye zihlala zisetyenziswa kwi-substrates eziqhubayo ngokusebenzisa umtsalane we-electrostatic. Nje ukuba zisetyenziswe, i-substrate iyafudunyezwa ukuze inyibilikise umgubo, ophumayo ukuze wenze ifilimu yomphezulu. I-substrate egqunyiweyo emva koko inokuvezwa ngoko nangoko kumandla e-UV ukuze kube lula ukunyanga. Ifilimu yomphezulu ephumayo ayisakwazi ukuguquka okanye ukuba buthathaka kubushushu.
Kukho iintlobo ngeentlobo zezi ngubo zinyangekayo ze-UV ezikhoyo eziqulethe indlela yesibini yokunyanga (isebenza ngobushushu, isabela kumswakama, njl.njl.) enokubonelela ngonyango kwiindawo ezingaphezulu ezingachaphazelekiyo kumandla e-UV. Ezi ngubo zidla ngokubizwa ngokuba ziingubo ezinyangekayo ezimbini.
Nokuba loluphi uhlobo lwengubo enyangekayo ye-UV esetyenzisiweyo, ukugqitywa komphezulu wokugqibela okanye umaleko unika umgangatho ogqwesileyo, ukuqina kunye neempawu zokumelana.
2. Iingubo ezinyangwa yi-UV zinamathela kakuhle kangakanani kwiintlobo ezahlukeneyo zeenkuni, kuquka neentlobo zeenkuni ezinamafutha?
Iingubo ezinyangwa yi-UV zinamathela kakuhle kwiintlobo ezininzi zeenkuni. Kubalulekile ukuqinisekisa ukuba kukho iimeko ezaneleyo zokunyanga ukuze kuqinisekiswe ukuba ziyanyamezela kwaye zinamathela kwi-substrate.
Kukho iintlobo ezithile ezinamafutha kakhulu ngokwendalo kwaye zinokufuna ukusetyenziswa kweprimer ekhuthaza ukunamathela, okanye "i-tiecoat." I-Van Technologies yenze uphando olukhulu kunye nophuhliso malunga nokunamathela kweengubo ezinyangwa yi-UV kwezi ntlobo zomthi. Uphuhliso lwakutshanje luquka i-sealer enye enyangwa yi-UV ethintela iioyile, ityuwa kunye ne-pitch ukuba zingaphazamisi ukunamathela kwe-UV-therapy topcoat.
Okanye, ioyile ekhoyo kumphezulu womthi ingasuswa ngaphambi kokuba ifakelwe i-acetone okanye esinye isinyibilikisi esifanelekileyo. Ilaphu elingena-lint, elifunxayo liqala limanziswe nge-solvent lize lisulwe phezu komphezulu womthi. Umphezulu uyavunyelwa ukuba wome uze emva koko kufakelwe i-UV-therapy. Ukususwa kweoyile yomphezulu kunye nezinye izinto ezingcolisayo kukhuthaza ukunamathela kwe-coating efakelweyo kumphezulu womthi.
3. Luhlobo luni lwamabala ahambelana neengubo ze-UV?
Naliphi na ibala elichazwe apha linokutywinwa kakuhle kwaye ligqunywe nge-100% yeenkqubo zepowder ezinyangekayo ze-UV, ezincitshisiweyo ze-UV, ezinyangekayo ngamanzi, okanye ezinyangekayo ze-UV. Ke ngoko, kukho inani leendibaniselwano ezisebenzayo ezenza uninzi lwebala kwimarike lifaneleke kuyo nayiphi na i-UV-treated coating. Nangona kunjalo, kukho izinto ezithile ezibalulekileyo ukuqinisekisa ukuba ziyahambelana nomgangatho womphezulu womthi.
Amabala Asemanzini kunye namabala Anokunyangeka Asemanzini Asebenzisa UV:Xa ufaka i-100% ye-UV-medical, i-UV-medical encitshisiweyo okanye i-UV-medical powder sealers/topcoats phezu kwamabala afumaneka emanzini, kubalulekile ukuba amabala ome ngokupheleleyo ukuthintela iziphene zokufana kwe-coating, kuquka i-orange peel, i-fisheyes, i-cratering, i-pooling kunye ne-puddling. Iziphene ezinjalo zenzeka ngenxa yoxinzelelo oluphantsi lomphezulu we-coating esetyenzisiweyo xa kuthelekiswa noxinzelelo oluphezulu lwamanzi olushiyekileyo oluvela kumabala asetyenzisiweyo.
Nangona kunjalo, ukusetyenziswa kwengubo enyangwa ngamanzi e-UV ngokuqhelekileyo kuyaxolela ngakumbi. Ibala elifakweyo linokubonisa ukufuma ngaphandle kwemiphumo emibi xa kusetyenziswa izitywini/ii-topcoats ezithile ezinyangwa ngamanzi e-UV. Ukufuma okuseleyo okanye amanzi aphuma kwibala aya kusasazeka ngokulula kwi-sealer/topcoat efakwe emanzini e-UV ngexesha lenkqubo yokomisa. Nangona kunjalo, kuyacetyiswa kakhulu ukuba kuvavanywe nayiphi na indibaniselwano yebala kunye ne-sealer/topcoat kwisampuli yovavanyo emeleyo ngaphambi kokuba ibekwe kumphezulu oza kugqitywa.
Amabala Asekelwe Kwioyile Nakwizinto Ezinyibilikayo:Nangona kusenokubakho inkqubo enokusetyenziswa kumabala angomi kakuhle asekelwe kwioyile okanye athwalwe sisinyibilikisi, kudla ngokuba yimfuneko, kwaye kucetyiswa kakhulu, ukuba omise ngokupheleleyo la mabala ngaphambi kokuba kusetyenziswe nayiphi na i-sealer/topcoat. Amabala okomisa kancinci alolu hlobo anokuthatha ukuya kuthi ga kwiiyure ezingama-24 ukuya kuma-48 (okanye ngaphezulu) ukuze kome ngokupheleleyo. Kwakhona, kucetyiswa ukuba kuvavanywe inkqubo kumphezulu womthi omeleyo.
Amabala anganyangekiyo nge-UV ayi-100%:Ngokubanzi, ii-UV coats ezinyangwa yi-100% zibonisa ukumelana okuphezulu kweekhemikhali namanzi xa zinyangiwe ngokupheleleyo. Olu kumelana kwenza kube nzima ukuba ii-coats ezifakelwe kamva zinamathele kakuhle ngaphandle kokuba umphezulu ongaphantsi onyangiwe yi-UV uxotyulwe ngokwaneleyo ukuvumela ukubopha ngoomatshini. Nangona ii-UV coats ezinyangwa yi-100% ezenzelwe ukwamkela ii-coats ezifakelwe kamva zifumaneka, uninzi lwee-UV coats ezinyangwa yi-100% kufuneka zixotyulwe okanye zixotyulwe kancinci (ezibizwa ngokuba yi-"B" stage okanye bump curing) ukukhuthaza ukunamathelana kwe-intercoat. Ukubeka "B" kubangela iindawo ezisele ezisabelayo kumaleko webala eziya kusabela kunye ne-UV coating efakelweyo njengoko iphantsi kweemeko zokuphilisa ngokupheleleyo. Ukubeka "B" kukwavumela ukuxotyulwa okuncinci ukuze kuthintelwe okanye kunqunyulwe naluphi na ukuphakama kwengqolowa okunokwenzeka ngenxa yokufakwa kwebala. Ukufakwa kwe-seal egudileyo okanye i-topcoat kuya kubangela ukunamathelana okuhle kwe-intercoat.
Enye into exhalabisayo ngamabala anganyangekiyo nge-UV ayi-100% iphathelele imibala emnyama. Amabala anombala kakhulu (kunye neengubo ezinombala ngokubanzi) asebenza ngcono xa kusetyenziswa izibane ze-UV ezinika amandla kufutshane nokukhanya okubonakalayo. Izibane ze-UV eziqhelekileyo ezixutywe ne-gallium kunye nezibane ze-mercury eziqhelekileyo zikhetho oluhle kakhulu. Izibane ze-UV LED ezikhupha i-395 nm kunye/okanye i-405 nm zisebenza ngcono kwiinkqubo ezinombala xa kuthelekiswa ne-365 nm kunye ne-385 nm arrays. Ngaphezu koko, iinkqubo zezibane ze-UV ezinika amandla amakhulu e-UV (mW/cm2).2kunye noxinano lwamandla (mJ/cm22) ikhuthaza ukunyanga okungcono ngokusebenzisa ibala elifakwe okanye umaleko wokugquma onombala.
Okokugqibela, njengakwezinye iinkqubo zokufaka amabala ezikhankanyiweyo apha ngasentla, kuyacetyiswa ukuba kuvavanywe ngaphambi kokuba kusetyenziswe umphezulu oza kuphoswa kwaye ugqitywe. Qiniseka ngaphambi kokuba unyangwe!
4. Yeyiphi ifilimu ephezulu/encinci eyakhiweyo kwiingubo ze-UV eziyi-100%?
Iingubo zomgubo ezinyangwa yi-UV ngokuqinisekileyo zi-100% zeengubo ezinyangwa yi-UV, kwaye ubukhulu bazo obusetyenziswayo bunqunyelwe ngamandla e-electrostatic okutsala adibanisa umgubo kumphezulu ogqityiweyo. Kungcono ukufuna ingcebiso kumenzi weengubo zomgubo we-UV.
Ngokuphathelele iingubo ezimanzi ezinyangekayo ze-UV eziyi-100%, ubukhulu befilimu emanzi esetyenzisiweyo buya kubangela ubukhulu befilimu eyomileyo obufanayo emva kokunyangwa kwe-UV. Ukuncipha okuthile akunakuphepheka kodwa kudla ngokuba yinto encinci. Nangona kunjalo, kukho izicelo zobugcisa kakhulu ezichaza ukunyamezela ubukhulu befilimu obuqinileyo okanye obuncinci. Kwezi meko, ukulinganiswa kwefilimu enyangiweyo ngqo kunokwenziwa ukuze kuhambelane nobukhulu befilimu emanzi neyomileyo.
Ubukhulu bokugqibela obucociweyo obunokufezekiswa buya kuxhomekeka kwikhemistri yengubo enyangwa yi-UV kunye nendlela eyenziwe ngayo. Kukho iinkqubo ezikhoyo ezilungiselelwe ukubonelela ngefilimu encinci kakhulu ephakathi kwe-0.2 mil - 0.5 mil (5µ - 15µ) kunye nezinye ezinokubonelela ngobukhulu obungaphezulu kwe-0.5 intshi (12 mm). Ngokwesiqhelo, iingubo ezicociweyo ze-UV ezinobuninzi obuphezulu be-cross-link, ezifana nezinye iifomyula ze-urethane acrylate, azikwazi ukwenza ubuninzi befilimu kumaleko omnye osetyenzisiweyo. Inqanaba lokuncipha xa kunyangwa liya kubangela ukuqhekeka okukhulu kwengubo efakwe ngokutyebileyo. Ubukhulu obuphezulu bokwakha okanye bokugqiba busenokufezekiswa kusetyenziswa iingubo ezicociweyo ze-UV ezinobunzima obuphezulu be-cross-link ngokusebenzisa iileya ezininzi ezincinci kunye nokusila kunye/okanye ukubeka i-"B" phakathi komaleko ngamnye ukukhuthaza ukunamathelana kwe-intercoat.
Indlela yokunyanga esabelayo kwiingubo ezininzi ezinyangwa yi-UV ibizwa ngokuba yi-"free radical initiated." Le ndlela yokunyanga esabelayo ichaphazeleka yioksijini emoyeni ecothisa okanye ithintele isantya sokunyanga. Oku kucotha kudla ngokubizwa ngokuba kukuthintela ioksijini kwaye kubaluleke kakhulu xa uzama ukufikelela kubukhulu befilimu encinci kakhulu. Kwiifilimu ezincinci, indawo engaphezulu komthamo opheleleyo wengubo esetyenzisiweyo iphezulu xa ithelekiswa nobukhulu befilimu obukhulu. Ke ngoko, ubukhulu befilimu encinci buchaphazeleka kakhulu kukuthintela ioksijini kwaye buphilisa kancinci kakhulu. Rhoqo, umphezulu wokugqiba uhlala unganyangeki ngokwaneleyo kwaye ubonisa imvakalelo yeoyile/igrisi. Ukumelana nokuthintela ioksijini, iigesi ezingasebenziyo ezifana ne-nitrogen kunye ne-carbon dioxide zinokudluliselwa phezu komphezulu ngexesha lokunyanga ukususa uxinzelelo lweoksijini, ngaloo ndlela zivumela ukuphiliswa ngokupheleleyo, ngokukhawuleza.
5. I-UV coating ecacileyo icace kangakanani?
Iingubo ezinyangwa yi-UV eziyi-100% zinokubonisa ukucaca okugqwesileyo kwaye ziya kukhuphisana neengubo ezicacileyo ezilungileyo kushishino. Ukongeza, xa zisetyenziswa kwimithi, zivelisa ubuhle obukhulu kunye nobunzulu bomfanekiso. Okubangela umdla ngakumbi ziinkqubo ezahlukeneyo ze-aliphatic urethane acrylate ezicacileyo ngokuphawulekayo kwaye ezingenambala xa zisetyenziswa kwiindawo ezahlukeneyo, kuquka umthi. Ngaphezu koko, iingubo ze-aliphatic polyurethane acrylate zizinzile kakhulu kwaye ziyamelana nokutshintsha kombala ngokuhamba kwexesha. Kubalulekile ukukhankanya ukuba iingubo ezikhanyayo ezisezantsi zisasaza ukukhanya kakhulu kuneengubo ezikhanyayo kwaye ngaloo ndlela ziya kuba nokucaca okuncinci. Nangona kunjalo, xa kuthelekiswa nezinye iikhemikhali zokugquma, iingubo ezinyangwa yi-UV eziyi-100% zilingana ukuba azingcono.
Iingubo ezinyangwa ngamanzi ezisebenzisa i-UV ezikhoyo ngeli xesha zinokwenziwa ukuze zibonelele ngokucacileyo okugqwesileyo, ubushushu bomthi kunye nokusabela ngokuchasene neenkqubo zokugqiba eziqhelekileyo. Ukucaca, ukucwebezela, impendulo yomthi kunye nezinye iimpawu zokusebenza kweengubo ezinyangwa yi-UV ezikhoyo kwimarike namhlanje zibalaseleyo xa zithengwa kubavelisi abasemgangathweni.
6. Ngaba kukho izinto zokugquma ezinombala okanye ezinombala we-UV ezinokunyangeka?
Ewe, iingubo ezinemibala okanye ezinombala zifumaneka lula kuzo zonke iintlobo zeengubo ezinyangwa yi-UV kodwa kukho izinto ekufuneka ziqwalaselwe ukuze kufunyanwe iziphumo ezilungileyo. Into yokuqala neyona ibalulekileyo kukuba imibala ethile iphazamisana nokukwazi kwamandla e-UV ukudlulisela, okanye ukungena, kwingubo enyangwa yi-UV esetyenzisiweyo. I-electromagnetic spectrum iboniswe kuMfanekiso 1, kwaye kunokubonwa ukuba i-spectrum yokukhanya ebonakalayo ikufutshane ne-UV spectrum. I-spectrum yi-continuum engenamigca ecacileyo (ubude bamaza) bomda. Ke ngoko, ummandla omnye udibana kancinci kancinci ube ngummandla okufutshane. Xa kujongwa ummandla wokukhanya obonakalayo, kukho amabango athile esayensi okuba uphakathi kwe-400 nm ukuya kwi-780 nm, ngelixa amanye amabango esithi uphakathi kwe-350 nm ukuya kwi-800 nm. Kule ngxoxo, kubalulekile kuphela ukuba siqaphele ukuba imibala ethile inokuthintela ngempumelelo ukudluliselwa kwamaza athile e-UV okanye imitha.
Ekubeni ingqwalasela ikwindawo ye-UV wavelength okanye yemitha, makhe sihlolisise loo mmandla ngokweenkcukacha. Umfanekiso 2 ubonisa ubudlelwane phakathi kwe-wavelength yokukhanya okubonakalayo kunye nombala ohambelanayo osebenzayo ekukuthinteleni. Kubalulekile ukwazi ukuba izinto ezifaka imibala zihlala zijikeleza uluhlu lwee-wavelengths kangangokuba umbala obomvu ungajikeleza uluhlu olukhulu kangangokuba unokufunxa kancinci kummandla we-UVA. Ke ngoko, imibala eyona ibalulekileyo iya kujikeleza uluhlu olutyheli – orenji – obomvu kwaye le mibala inokuphazamisana nonyango olusebenzayo.
Izinto ezifaka imibala aziphazamisi nje kuphela ukucinywa kwe-UV, kodwa zikwayinto ekufuneka uyiqwalasele xa usebenzisa izinto ezimhlophe ezinombala, ezifana neeprimer ezinyangwa yi-UV kunye neepeyinti ze-topcoat. Cinga nge-absorbance spectrum ye-white pigment titanium dioxide (TiO2), njengoko kubonisiwe kuMfanekiso 3. I-TiO2 ibonisa ukufunxwa okunamandla kakhulu kulo lonke ummandla we-UV kwaye, izinto ezimhlophe ezinyangwa yi-UV ziyanyangwa ngempumelelo. Njani? Impendulo ikwindlela ecwangcisiweyo ngumphuhlisi we-coating kunye nomenzi wayo ngokuhambelana nokusetyenziswa kwezibane ze-UV ezifanelekileyo zokucoca. Izibane ze-UV eziqhelekileyo neziqhelekileyo ezisetyenziswayo zikhupha amandla njengoko kubonisiwe kuMfanekiso 4.
Isibane ngasinye esibonisiweyo sisekelwe kwi-mercury, kodwa ngokufaka i-mercury kwenye into yesinyithi, ukukhutshwa kwayo kunokutshintshela kwezinye iindawo ze-wavelength. Kwimeko ye-TiO2-based, emhlophe, enokunyangwa yi-UV, amandla aziswa sisibane se-mercury esiqhelekileyo aya kuthintelwa ngokufanelekileyo. Amanye amaza aphezulu aziswayo anokubonelela ngonyango kodwa ubude bexesha elifunekayo ukuze kulungiswe ngokupheleleyo busenokungasebenzi. Nangona kunjalo, ngokufaka i-gallium kwisibane se-mercury, kukho amandla amaninzi aluncedo kummandla ongathintelwanga ngokufanelekileyo yi-TiO2. Ukusebenzisa indibaniselwano yezi ntlobo zombini zezibane, zombini ngokusebenzisa i-cure (ukusebenzisa i-gallium doped) kunye ne-surface cure (ukusebenzisa i-mercury esemgangathweni) kunokwenziwa (Umfanekiso 5).
Okokugqibela, kufuneka kwenziwe izinto zokugquma ezinombala okanye ezinombala we-UV ezinyangekayo kusetyenziswa ii-photoinitiators ezifanelekileyo ukuze amandla e-UV - uluhlu lwamaza okukhanya olubonakalayo oluziswa zizibane - asetyenziswe ngokufanelekileyo ukuze kunyangeke ngempumelelo.
Eminye Imibuzo?
Ngokuphathelele nayiphi na imibuzo ephakamayo, ungaze ungathandabuzi ukubuza umthengisi wenkampani wangoku okanye wexesha elizayo weengubo, izixhobo kunye neenkqubo zokulawula inkqubo. Iimpendulo ezilungileyo ziyafumaneka ukunceda ekwenzeni izigqibo ezisebenzayo, ezikhuselekileyo nezinenzuzo.
ULawrence (Larry) uVan Iseghem ngumongameli/i-CEO yeVan Technologies, Inc. IVan Technologies inamava angaphezu kweminyaka engama-30 kwiingubo ezinyangwa yi-UV, iqala njengenkampani ye-R&D kodwa yaguquka ngokukhawuleza yaba ngumvelisi we-Application Specific Advanced Coatings™ ekhonza izibonelelo zokugquma zemizi-mveliso kwihlabathi liphela. Iingubo ezinyangwa yi-UV bezisoloko ziyinto ephambili, kunye nezinye iiteknoloji zokugquma "eziluhlaza", kugxininiswa ekusebenzeni okulingana okanye okugqitha iiteknoloji zesiqhelo. IVan Technologies yenza uphawu lweGreenLight Coatings™ lweengubo zemizi-mveliso ngokwenkqubo yolawulo lomgangatho eqinisekisiweyo ye-ISO-9001:2015. Ukuze ufumane ulwazi oluthe kratya, ndwendwelawww.greenlightcoatings.com.
Ixesha lokuthumela: Julayi-22-2023
