NguLawrence (Larry) UVan Iseghem unguMongameli/i-CEO yeVan Technologies, Inc.
Phakathi nesikhathi sokwenza ibhizinisi namakhasimende ezimboni emhlabeni jikelele, siphendule imibuzo eminingi emangalisayo futhi sinikeze izixazululo eziningi ezihlobene nokwembozwa kwe-UV okwelapheka. Okulandelayo eminye yemibuzo evame kakhulu, futhi izimpendulo ezihambisana nayo zingase zinikeze ukuqonda okuwusizo.
1. Ziyini izembozo ezilapheka nge-UV?
Embonini yokuqeda ukhuni, kunezinhlobo ezintathu eziyinhloko zezingubo zokumboza ezilapheka nge-UV.
Izembozo ezisebenza ngo-100% (ngezinye izikhathi ezibizwa ngokuthi yi-100% izinto eziqinile) ezilaphekayo nge-UV ziyizakhi zamakhemikhali eziwuketshezi ezingenayo i-solvent noma amanzi. Lapho isetshenziswa, isembozo sivele sivele emandleni e-UV ngaphandle kwesidingo sokoma noma ukuhwamuka ngaphambi kokwelashwa. Izembozo ezisetshenziswayo zisabela ekwakheni ungqimba oluqinile lobuso ngenqubo ephendulayo echazwe futhi ebizwa ngokufanele ngokuthi i-photopolymerization. Njengoba kungekho ukuhwamuka okudingekayo ngaphambi kokwelashwa, inqubo yokufaka kanye nokwelapha isebenza kahle kakhulu futhi ingabizi kakhulu.
Izembozo ze-UV ezithwala amanzi noma ezithwala i-solvent hybrid ezithwala i-UV ngokusobala ziqukethe amanzi noma i-solvent ukunciphisa okuqukethwe okusebenzayo (noma okuqinile). Lokhu kunciphisa okuqukethwe okuqinile kuvumela ukulula okukhulu ekulawuleni ukujiya kwefilimu emanzi esetshenziswayo, kanye/noma ekulawuleni ukujiya kwezembozo. Lapho zisetshenziswa, lezi zembozo ze-UV zifakwa ezindaweni zokhuni ngezindlela ezahlukahlukene futhi zidinga ukomiswa ngokuphelele ngaphambi kokwelashwa kwe-UV.
Izembozo zempuphu ezilaphekayo ze-UV nazo ziyinhlanganisela eqinile engu-100% futhi zivame ukufakwa kuma-substrate aqhubayo ngokukhanga kwe-electrostatic. Uma sezifakiwe, i-substrate iyashiswa ukuze incibilikise i-powder, ephumayo ukuze yakhe ifilimu engaphezulu. I-substrate ehlanganisiwe ingabe seyivezwa ngokushesha emandleni e-UV ukuze kube lula ukupholisa. Ifilimu engaphezulu ephumayo ayisakwazi ukuguqulwa ukushisa noma ukuzwela.
Kunezinhlobo ezahlukene zalezi zingubo zokumboza ezilaphekayo ze-UV ezitholakalayo eziqukethe indlela yesibili yokwelapha (esebenza ngokushisa, esabela kumswakama, njll.) enganikeza ukwelashwa ezindaweni ezingaphezulu ezingavezwanga emandleni e-UV. Lezi zingubo zivame ukubizwa ngokuthi izambatho zokumboza ezimbili.
Kungakhathaliseki ukuthi hlobo luni lwesembozo esingelapheka nge-UV esisetshenzisiwe, ukuqeda kokugcina noma ungqimba kunikeza ikhwalithi ephezulu, ukuqina kanye nezakhiwo zokumelana.
2. Izimbozo ezilapheka nge-UV zinamathela kahle kangakanani ezinhlotsheni ezahlukene zokhuni, okuhlanganisa nezinhlobo zokhuni olunamafutha?
Izembozo ezilaphekayo nge-UV zibonisa ukunamathela okuhle kakhulu ezinhlotsheni eziningi zezinkuni. Kubalulekile ukuqinisekisa ukuthi kunezimo ezanele zokuphulukisa ukuze kuhlinzekwe ngokwelashwa kanye nokunamathela okuhambisanayo nesisekelo.
Kunezinhlobo ezithile ngokwemvelo ezinamafutha amaningi futhi ezingadinga ukusetshenziswa kwe-primer ekhuthaza ukunamathela, noma "i-tiecoat." I-Van Technologies yenze ucwaningo olukhulu kanye nentuthuko ekunamatheleni kwezimbozo ezimelana ne-UV kulezi zinhlobo zokhuni. Intuthuko yakamuva ifaka phakathi isivalo esisodwa esimelana ne-UV esivimbela amafutha, ijusi kanye ne-pitch ukuthi kungaphazamisi ukunamathela kwe-UV-elakalayo topcoat.
Ngaphandle kwalokho, uwoyela okhona ebusweni bokhuni ungasuswa ngaphambi nje kokufakwa kwesembozo ngokusula nge-acetone noma esinye isinyibilikisi esifanele. Indwangu engena-lint, emunca amanzi kuqala imanziswa ngesembozo bese isula phezu kokhuni. Ubuso buvunyelwe ukuba bome bese kufakwa isembozo esingelapheki se-UV. Ukususwa kwamafutha ongaphezulu kanye nezinye izinto ezingcolisayo kukhuthaza ukunamathela okulandelayo kwesembozo esifakiwe ebusweni bokhuni.
3. Hlobo luni lwamabala ahambisana ne-UV coating?
Noma yimaphi amabala achazwe lapha angavalwa ngempumelelo futhi ambozwe phezulu ngezinhlelo zempuphu ezilaphekayo ze-UV eziyi-100%, ezincishisiwe nge-solvent-reduced UV, eziphathwa ngamanzi, noma ezilaphekayo ze-UV. Ngakho-ke, kunezinhlanganisela eziningana ezisebenzayo ezenza iningi lanoma yiliphi ibala emakethe lifaneleke kunoma yikuphi ukugqoka okulaphekayo kwe-UV. Nokho, kunezici ezithile ezibalulekile ukuqinisekisa ukuthi kukhona ukuhambisana nokuhlobisa okuphezulu kokhuni.
Amabala Atholakala Emanzini kanye Namabala Alulamayo Atholakala Emanzini Nge-UV:Uma usebenzisa ama-sealers/topcoat e-UV alaphekayo, ancishiswe yi-UV noma alaphekayo nge-UV phezu kwamabala atholakala emanzini, kubalulekile ukuthi amabala ome ngokuphelele ukuze kuvinjelwe amaphutha ekufaneni kwe-coating, okuhlanganisa ikhasi le-orange, ama-fisheye, ama-cratering, ukuhlanganisa kanye ne-puddling. Amaphutha anjalo abangelwa ukucindezelwa okuphansi kobuso be-coating obufakiwe uma kuqhathaniswa nokucindezelwa okuphezulu kwamanzi okusele okuvela kumabala afakiwe.
Nokho, ukusetshenziswa kwesembozo esingelapheka emanzini se-UV ngokuvamile kuyathethelela kakhulu. Ibala elifakiwe lingabonisa umswakama ngaphandle kwemiphumela emibi uma kusetshenziswa ama-sealers/topcoat athile alapheka emanzini e-UV. Umswakama osele noma amanzi asuka ekusetshenzisweni kwebala azosakazeka kalula nge-sealer/topcoat esetshenziswa emanzini e-UV ngesikhathi senqubo yokomisa. Nokho, kuyalulekwa kakhulu ukuhlola noma yikuphi ukuhlanganiswa kwebala kanye ne-sealer/topcoat kusampula yokuhlola emele ngaphambi kokuzibophezela endaweni yangempela ezoqedwa.
Amabala Asekelwe Kuwoyela Nalawo Athwala Isinyibilikisi:Nakuba kungase kube khona uhlelo olungasetshenziswa kumabala angomi ngokwanele asekelwe ku-oyili noma athwalwe yi-solvent, ngokuvamile kuyadingeka, futhi kunconywa kakhulu, ukuwomisa ngokuphelele la mabala ngaphambi kokufaka noma iyiphi i-sealer/topcoat. Amabala okomisa kancane alolu hlobo angadinga amahora angama-24 kuya kwangu-48 (noma ngaphezulu) ukuze kufezwe ukoma okuphelele. Futhi, ukuhlola uhlelo phezu kokhuni olumele kuyalulekwa.
Amabala Angelapheka Nge-UV angu-100%:Ngokuvamile, izembozo ezilaphekayo ze-UV eziyi-100% zibonisa ukumelana okuphezulu kwamakhemikhali namanzi uma zilaphekile ngokuphelele. Lokhu kumelana kwenza kube nzima ukuthi izembozo ezilaphekayo kamuva zinamathele kahle ngaphandle kokuthi indawo engaphansi elaphekile ye-UV ilaphekile ngokwanele ukuvumela ukubopha ngomshini. Nakuba kunezimbozo ezilaphekayo ze-UV eziyi-100% ezenzelwe ukwamukela izembozo ezilaphekayo kamuva, iningi lezimbozo ezilaphekayo ze-UV eziyi-100% lidinga ukulapheka noma ukulapheka kancane (okubizwa ngokuthi "isigaba se-B" noma ukuhluma kwe-bump) ukuze kukhuthazwe ukunamathelana kwe-intercoat. Ukubeka "B" kuphumela ezindaweni ezisele ezisabelayo kungqimba lwebala ezizosabela kanye nesembozo esilaphekayo se-UV esisetshenziswayo njengoba sibhekene nezimo zokupholisa ngokuphelele. Ukubeka "B" kuvumela futhi ukulapheka okuncane ukuze kususwe noma kunqunywe noma yikuphi ukuphakama kwezinhlamvu okungenzeka ngenxa yokufakwa kwebala. Ukufakwa kwe-seal ebushelelezi noma i-topcoat kuzoholela ekunamatheleni okuhle kwe-intercoat.
Okunye ukukhathazeka ngamabala alaphekayo angu-100% e-UV kuphathelene nemibala emnyama. Amabala anombala kakhulu (kanye nezingubo ezinombala ngokuvamile) asebenza kangcono uma kusetshenziswa izibani ze-UV eziletha amandla eduze kokukhanya okubonakalayo. Izibani ze-UV ezivamile ezihlanganiswe ne-gallium kanye nezibani ze-mercury ezijwayelekile ziyisinqumo esihle kakhulu. Izibani ze-UV LED ezikhipha i-395 nm kanye/noma i-405 nm zisebenza kangcono nezinhlelo ezinombala uma kuqhathaniswa nama-array angu-365 nm kanye no-385 nm. Ngaphezu kwalokho, izinhlelo zezibani ze-UV ezinikeza amandla amakhulu e-UV (mW/cm2).2) kanye nobuningi bamandla (mJ/cm2) kukhuthaza ukwelashwa okungcono ngokusebenzisa ibala elifakwe noma ungqimba lwesembozo esinombala.
Okokugcina, njengakwezinye izinhlelo zokufaka amabala okukhulunywe ngazo ngenhla, kuyalulekwa ukuthi kuhlolwe ngaphambi kokusebenza ngomphezulu ozofakwa amabala futhi uqedwe. Qiniseka ngaphambi kokwelashwa!
4. Iyini ifilimu ephezulu/encane eyakhiwe nge-UV engu-100%?
Izembozo zempuphu ezilaphekayo nge-UV ngokweqiniso ziyizembozo ezilaphekayo nge-UV eziyi-100%, futhi ubukhulu bazo obusetshenziswayo bunqunyelwe amandla kagesi adonsela phansi ahlanganisa impuphu endaweni eqediwe. Kungcono ukufuna iseluleko kumkhiqizi wezembozo zempuphu ze-UV.
Ngokuphathelene nokwembozwa okumanzi okungu-100% kwe-UV okuphulukiswayo, ukujiya kwefilimu emanzi esetshenziswayo kuzoholela ekujiyeni kwefilimu eyomile cishe okufanayo ngemva kokwelashwa kwe-UV. Okunye ukuncishiswa akunakugwenywa kodwa ngokuvamile akunamphumela omkhulu. Nokho, kunezinhlelo zokusebenza zobuchwepheshe obuphezulu ezichaza ukubekezelela ukujiya kwefilimu okuqinile kakhulu noma okunciphile. Kulezi zimo, ukulinganisa ifilimu elashwe ngqo kungenziwa ukuze kuhlotshaniswe ukujiya kwefilimu emanzi neyomile.
Ubukhulu bokugcina obuqinisiwe obungatholakala buzoncika kumakhemikhali wengubo ephiliswayo ye-UV nokuthi yakhiwe kanjani. Kunezinhlelo ezitholakalayo eziklanyelwe ukuhlinzeka ngama-deposit amafilimu amancane kakhulu phakathi kuka-0.2 mil - 0.5 mil (5µ - 15µ) kanye nezinye ezinganikeza ubukhulu obungaphezu kwama-intshi angu-0.5 (12 mm). Ngokuvamile, izembozo eziphiliswayo ze-UV ezinobukhulu obuphezulu be-cross-link, njengezinye izinhlobo ze-urethane acrylate, azikwazi ukujiya kwefilimu ephezulu kungqimba olulodwa olusetshenzisiwe. Izinga lokuncishiswa lapho kuqinisiwe lizobangela ukuqhekeka okukhulu kwengubo ephiliswayo eqinisiwe. Ubukhulu obuphezulu bokwakha noma bokuqeda bungatholakala kusetshenziswa izembozo eziphiliswayo ze-UV ezinobukhulu obuphezulu be-cross-link ngokusebenzisa izendlalelo eziningi ezincane kanye nokusikwa kanye/noma ukufakwa kwe-“B” phakathi kwengqimba ngayinye ukukhuthaza ukunamathelana kwe-intercoat.
Indlela yokwelapha ephendulayo yezimbozo eziningi ezilaphekayo ze-UV ibizwa ngokuthi “i-free radical initiated.” Le ndlela yokwelapha ephendulayo isengozini yomoya-mpilo emoyeni okwehlisa noma okuvimbela ijubane lokwelapha. Lokhu kunciphisa kuvame ukubizwa ngokuthi ukuvimbela umoya-mpilo futhi kubaluleke kakhulu lapho uzama ukufeza ukuqina kwefilimu encane kakhulu. Kumafilimu amancane, indawo engaphezulu kwenani eliphelele lembozo esetshenzisiwe iphakeme uma iqhathaniswa nobukhulu befilimu obukhulu. Ngakho-ke, ukuqina kwefilimu encane kusengozini kakhulu yokuvimbela umoya-mpilo futhi kuphulukiswa kancane kakhulu. Ngokuvamile, ubuso bokuphela buhlala bungaphilile ngokwanele futhi bubonisa umuzwa wamafutha/onamafutha. Ukuze kulwiswane nokuvimbela umoya-mpilo, amagesi angasebenzi njenge-nitrogen ne-carbon dioxide angadluliselwa phezu kobuso ngesikhathi sokwelapha ukuze kususwe ukugcwala komoya-mpilo, ngaleyo ndlela kuvunyelwe ukwelashwa okuphelele, okusheshayo.
5. I-UV ecacile icacile kangakanani?
Izembozo ezilaphekayo ze-UV eziyi-100% zingabonisa ukucaca okuhle kakhulu futhi zizoncintisana nezembozo ezicacile ezinhle kakhulu embonini. Ngaphezu kwalokho, uma zisetshenziswa okhunini, ziveza ubuhle obukhulu kanye nokujula kwesithombe. Okuthakazelisa kakhulu izinhlelo ezahlukene ze-aliphatic urethane acrylate ezicacile ngokuphawulekayo futhi ezingenambala uma zisetshenziswa ezindaweni eziningi, kufaka phakathi ukhuni. Ngaphezu kwalokho, izembozo ze-aliphatic polyurethane acrylate zizinzile kakhulu futhi zimelana nokushintsha kombala njengoba isikhathi sikhula. Kubalulekile ukuphawula ukuthi izembozo ezicwebezelayo kancane zisakaza ukukhanya kakhulu kunezembozo ezicwebezelayo futhi ngaleyo ndlela zizoba nokucaca okuncane. Uma kuqhathaniswa nezinye i-chemistry zezembozo, nokho, izembozo ezicwebezelayo ze-UV eziyi-100% zilingana uma zingcono.
Izembozo ezilaphekayo eziqhutshwa ngamanzi nge-UV ezitholakalayo ngalesi sikhathi zingakhiwa ukuze zinikeze ukucaca okumangalisayo, ukufudumala kokhuni kanye nokusabela ekuncintisaneni nezinhlelo zokuqeda ezivamile ezingcono kakhulu. Ukucaca, ukucwebezela, impendulo yokhuni kanye nezinye izakhiwo zokusebenza zezembozo ezilaphekayo nge-UV ezitholakala emakethe namuhla zinhle kakhulu uma zitholakala kubakhiqizi abasezingeni eliphezulu.
6. Ingabe kukhona izembozo ze-UV ezinombala noma ezinombala ezingelapheka?
Yebo, izembozo ezinemibala noma ezinombala zitholakala kalula kuzo zonke izinhlobo zezembozo ezilaphekayo ze-UV kodwa kunezici okufanele zicatshangelwe ukuze kutholakale imiphumela emihle kakhulu. Isici sokuqala nesibaluleke kakhulu iqiniso lokuthi imibala ethile iphazamisa ikhono lamandla e-UV lokudlulisela, noma ukungena, kwezembozo ezilaphekayo ze-UV ezisetshenziswayo. I-spectrum ye-electromagnetic iboniswe ku-Image 1, futhi kungabonakala ukuthi i-spectrum yokukhanya ebonakalayo iseduze ne-spectrum ye-UV. I-spectrum iyi-continuum engenamigqa ecacile (ubude bamagagasi) bokuhlukaniswa. Ngakho-ke, isifunda esisodwa sihlangana kancane kancane sibe yisifunda esiseduze. Uma sibheka isifunda sokukhanya esibonakalayo, kunezinye izimangalo zesayensi zokuthi sisuka ku-400 nm kuya ku-780 nm, kanti ezinye izimangalo zithi sisuka ku-350 nm kuya ku-800 nm. Kule ngxoxo, kubalulekile ukuthi siqaphele ukuthi imibala ethile ingavimba ngempumelelo ukudluliselwa kwamaza athile e-UV noma imisebe.
Njengoba ukugxila kusesifundeni se-UV wavelength noma semisebe, ake sihlole leso sifunda ngokuningiliziwe. Isithombe 2 sibonisa ubudlelwano phakathi kwe-wavelength yokukhanya okubonakalayo nombala ohambisanayo osebenza kahle ekukuvimbeni. Kubalulekile futhi ukwazi ukuthi izinto ezifaka imibala zivame ukuhlanganisa ububanzi be-wavelength ukuze umbala obomvu uhlanganise ububanzi obukhulu kangangokuthi ungangena kancane esifundeni se-UVA. Ngakho-ke, imibala ebaluleke kakhulu izohlanganisa ububanzi obuphuzi – o-orenji – obomvu futhi le mibala ingaphazamisa ukwelashwa okuphumelelayo.
Izinto zokufaka imibala aziphazamisi nje kuphela ukugqwala kwe-UV, kodwa futhi ziyizinto okufanele uzicabangele uma usebenzisa izinto zokufaka ezimhlophe ezinombala, njengezinto zokufaka imibala ezilaphekayo ze-UV kanye nopende we-topcoat. Cabanga nge-spectrum yokumunca ye-titanium dioxide emhlophe (TiO2), njengoba kuboniswe esithombeni 3. I-TiO2 ibonisa ukumunca okunamandla kakhulu kuso sonke isifunda se-UV kodwa-ke, izinto zokufaka ezimhlophe ezilaphekayo ze-UV ziyalapheka ngempumelelo. Kanjani? Impendulo itholakala ekwakhiweni okucophelelayo ngunjiniyela wezinto zokufaka kanye nomenzi okuhambisana nokusetshenziswa kwezibani ze-UV ezifanele zokwelapha. Izibani ze-UV ezivamile, ezivamile ezisetshenziswayo zikhipha amandla njengoba kuboniswe esithombeni 4.
Isibani ngasinye esiboniswe ngenhla sisekelwe ku-mercury, kodwa ngokufaka i-mercury ngesinye isici sensimbi, ukukhishwa kungadlulela kwezinye izindawo zamaza. Endabeni yezingubo ezimhlophe, ezisuselwe ku-TiO2, amandla alethwa yisibani se-mercury esijwayelekile azovinjelwa ngempumelelo. Amanye amaza aphezulu alethwayo anganikeza ukwelashwa kodwa ubude besikhathi esidingekayo ukuze kulungiswe ngokuphelele kungenzeka kungabi wusizo. Nokho, ngokufaka i-gallium esibani se-mercury, kukhona amandla amaningi awusizo esifundeni esingavinjelwanga ngempumelelo yi-TiO2. Ukusebenzisa inhlanganisela yazo zombili izinhlobo zezibani, kokubili ngokusebenzisa ukwelashwa (ukusebenzisa i-gallium doped) kanye nokwelashwa kwendawo (ukusebenzisa i-mercury ejwayelekile) kungafezwa (Isithombe 5).
Okokugcina, izembozo ze-UV ezinombala noma ezinombala zidinga ukwakhiwa kusetshenziswa ama-photoinitiators afanele ukuze amandla e-UV - ububanzi bokukhanya okubonakalayo obulethwa yizibani - asetshenziswe kahle ukuze kuphulukiswe ngempumelelo.
Eminye Imibuzo?
Ngokuphathelene nanoma yimiphi imibuzo ephakamayo, ungalokothi unqikaze ukubuza umhlinzeki wamanje noma wesikhathi esizayo wenkampani wezingubo zokumboza, imishini kanye nezinhlelo zokulawula izinqubo. Izimpendulo ezinhle ziyatholakala ukusiza ukwenza izinqumo ezisebenzayo, eziphephile nezinenzuzo. u
ULawrence (Larry) Van Iseghem ungumongameli/i-CEO yeVan Technologies, Inc. IVan Technologies ineminyaka engaphezu kwengu-30 yesipiliyoni ekugqokeni okulaphekayo kwe-UV, eqala njengenkampani ye-R&D kodwa yashintsha ngokushesha yaba umkhiqizi we-Application Specific Advanced Coatings™ ekhonza izikhungo zokumboza zezimboni emhlabeni jikelele. Ukumboza okulaphekayo kwe-UV bekulokhu kugxilwe kakhulu, kanye nobunye ubuchwepheshe bokumboza "Oluhlaza", kugcizelelwa ekusebenzeni okulingana noma okudlula ubuchwepheshe obuvamile. IVan Technologies ikhiqiza uhlobo lweGreenLight Coatings™ lokumboza kwezimboni ngokuya ngohlelo lokuphatha ikhwalithi oluqinisekisiwe lwe-ISO-9001:2015. Ukuze uthole ulwazi olwengeziwe, vakashelawww.greenlightcoatings.com.
Isikhathi sokuthunyelwe: Julayi-22-2023
