Ngu-Lawrence (Larry) u-Van Iseghem unguMongameli/i-CEO ye-Van Technologies, Inc.
Ngesikhathi senza ibhizinisi namakhasimende ezimboni emazweni ngamazwe, siphendule imibuzo eminingi emangalisayo futhi sinikeze izisombululo eziningi ezihambisana nezingubo ezilaphekayo ze-UV. Okulandelayo eminye yemibuzo evame kakhulu, futhi izimpendulo ezihambisana nayo zingase zinikeze ukuqonda okuwusizo.
1. Yiziphi izimbotshana ezilapheka nge-UV?
Embonini yokuqedela izinkuni, kunezinhlobo ezintathu eziyinhloko zezingubo ezilapheka nge-UV.
Ukusebenza okungu-100% (ngezinye izikhathi kubizwa ngokuthi okuqinile okungu-100%) Izingubo ezilapheka nge-UV ziyinhlanganisela yamakhemikhali awuketshezi engaqukethe noma iyiphi i-solvent noma amanzi. Lapho isetshenziswa, okokunamathela kuvezwa ngokushesha emandleni e-UV ngaphandle kwesidingo sokomisa noma ukuhwamuka ngaphambi kokwelapha. Ukwakheka kwe-coating esetshenzisiwe kusabela ukuze kwakhe ungqimba olungaphezulu kwendawo ngenqubo esebenzayo echazwe futhi ebizwa ngokufanelekile ngokuthi i-photopolymerization. Njengoba kungekho ukuhwamuka okudingekayo ngaphambi kokwelapha, inqubo yokufaka neyokwelapha kusebenza kahle ngokumangalisayo futhi kuyabiza.
Izindwangu ezixutshwe ngamanzi noma ezithwala i-solvent ekwazi ukuphulukiswa yi-UV ngokusobala ziqukethe amanzi noma into encibilikayo ukuze kuncishiswe okuqukethwe okusebenzayo (noma okuqinile). Lokhu kwehliswa kokuqukethwe okuqinile kuvumela ukukhululeka okukhulu ekulawuleni ukujiya kwefilimu emanzi esetshenziswayo, kanye/noma ekulawuleni i-viscosity ye-coating. Lapho isetshenziswa, lezi zembatho ze-UV zisetshenziswa ezindaweni zokhuni ngezindlela ezahlukahlukene futhi zidinga ukomiswa ngokuphelele ngaphambi kokwelashwa kwe-UV.
Izembatho zempushana ezilapheka nge-UV nazo ziyi-100% yezingoma eziqinile futhi ngokuvamile zisetshenziswa kuma-conductive substrates ngokuheha i-electrostatic. Uma isisetshenzisiwe, i-substrate iyashiswa ukuze incibilike impushana, ephumela ngaphandle ukuze yakhe ifilimu engaphezulu. I-substrate eboshiwe ingavezwa ngokushesha emandleni e-UV ukuze kube lula ukwelapha. Ifilimu yangaphezulu ewumphumela ayisekho ukonakala noma ukuzwela.
Kukhona okuhlukile kwalezi zimbotshana ezelapheka nge-UV ezitholakalayo eziqukethe indlela yokwelapha yesibili (ukushisa okucushiwe, ukusebenza komswakama, njll) okunganikeza ikhambi ezindaweni ezingaphezulu ezingavezwanga amandla e-UV. Lezi zingubo ngokuvamile zibizwa ngokuthi ama-double-cure coatings.
Kungakhathalekile ukuthi hlobo luni lwe-UV eyelaphekayo esetshenziswayo, indawo yokugcina ephezulu noma isendlalelo sinikeza ikhwalithi ehlukile, ukuqina kanye nezakhiwo zokumelana.
2. Ngabe izimbotshana ezilapheka nge-UV zinamathela kanjani ezinhlotsheni ezahlukene zokhuni, kuhlanganise nezinhlobo zokhuni olunamafutha?
Izembatho ezelaphekayo ze-UV zibonisa ukunamathela okuhle kakhulu ezinhlotsheni eziningi zokhuni. Kubalulekile ukwenza isiqiniseko sokuthi kunezimo ezanele zokwelapha ukuze kuhlinzekwe ngokwelashwa nokunamathela okuhambisanayo ku-substrate.
Kunezinhlobo ezithile zezinhlobo ezinamafutha ngokwemvelo futhi zingadinga ukusetshenziswa kwe-primer ekhuthaza ukunamathela, noma i-“tiecoat.” I-Van Technologies yenze ucwaningo nentuthuko enkulu ekunamatheleni kwezingubo ezilapheka nge-UV kulezi zinhlobo zokhuni. Intuthuko yakamuva ihlanganisa isivalo esisodwa eselapheka nge-UV esivimbela uwoyela, uketshezi kanye ne-pitch ekuphazamiseni ukunamathela kwejazi eliphezulu elapheka e-UV.
Ngaphandle kwalokho, amafutha akhona endaweni yokhuni angasuswa ngaphambi nje kokufakwa kwe-coating ngokusula nge-acetone noma enye i-solvent efanelekile. Indwangu engenalinti, emuncayo iqale imanziswe nge-solvent bese yesulwa phezu kokhuni. Ingaphezulu livunyelwe ukuba lome bese kufakwa i-UV-eyelaphekayo. Ukususwa kwamafutha angaphezulu nokunye ukungcola kukhuthaza ukunamathela okulandelayo kwengubo esetshenzisiwe endaweni yokhuni.
3. Iluphi uhlobo lwamabala oluhambisana nezingubo ze-UV?
Noma yimaphi amabala achazwe lapha angavalwa kahle futhi agcotshwe phezulu ngamasistimu empushana alaphekayo e-UV ancishiswe ngo-100%, ancishiswe yi-UV-encishisiwe, ahlanjululwe ngamanzi e-UV, noma e-UV. Ngakho-ke, kunenqwaba yezinhlanganisela ezisebenzayo okwenza iningi lanoma yiliphi ibala emakethe lifanele noma yikuphi ukunamathela kwe-UV. Kukhona, nokho, ukucatshangelwa okuthile okuphawulekayo ukuze kuqinisekiswe ukuhambisana kukhona ukuze kuqedwe ikhwalithi yokhuni.
Amabala Aphuma emanzini kanye namabala aphuma emanzini-UV-Elaphekayo:Uma ufaka ama-100% ama-UV-curable, ehliswe ukuncibilika kwe-UV-elulaphekayo noma amajazi empushana ayelapheka nge-UV phezu kwamabala aphuma emanzini, kubalulekile ukuthi ibala lome ngokuphelele ukuze kuvinjelwe amaphutha ekuhlanganiseni okufanayo, okuhlanganisa ikhasi lewolintshi, amehlo ezinhlanzi, i-cratering. , ukuhlanganisa nokugida. Amaphutha anjalo avela ngenxa yokungaguquguquki kwendawo okuphansi kwezimbotshana ezisetshenzisiwe ngokuhlobene nokushuba okuphezulu kwendawo yamanzi eyinsalela evela ebaleni elisetshenzisiwe.
Nokho, ukusetshenziswa koqweqwe lwamanzi olukwazi ukwelashwa nge-UV, ngokuvamile kuthethelela kakhulu. Ibala elisetshenzisiwe lingabonisa umswakama ngaphandle kwemiphumela emibi lapho kusetshenziswa izitywini/amajazi angaphezulu eselaphekayo atholakala emanzini-UV. Umswakama oyinsalela noma amanzi asuka ohlelweni lwamabala azosakazeka kalula ngesivalo/ingubo yangaphezulu ye-UV esetshenziswa emanzini phakathi nenqubo yokomisa. Kuyalulekwa kakhulu, nokho, ukuthi uhlole noma iyiphi inhlanganisela ye-stain nesealer/topcoat esibonelweni sokuhlola esimele ngaphambi kokuzibophezela endaweni yangempela ukuthi iqedelwe.
Amabala Asuselwa Kuwoyela kanye Ne-Solvent-Borne:Nakuba kungase kube khona isistimu engasetshenziswa kumabala anganele asekelwe kuwoyela omisiwe noma athwala i-solvent, ngokuvamile kuyadingeka, futhi kunconywe kakhulu, ukomisa ngokuphelele lawa mabala ngaphambi kokusetshenziswa kwanoma iyiphi i-sealer/topcoat. Ukomisa kancane amabala alezi zinhlobo kungase kudinge kufikela kumahora angu-24 kuya kwangu-48 (noma ngaphezulu) ukuze kuzuzwe ukoma okugcwele. Futhi, kunconywa ukuhlola uhlelo endaweni emele izinkuni.
100% Amabala Elaphekayo e-UV:Ngokuvamile, i-100% yezingubo ezilaphekayo ze-UV zibonisa ukumelana namakhemikhali aphezulu namanzi lapho selaphekile ngokuphelele. Lokhu kumelana kwenza kube nzima ukuthi izimbotshana ezisetshenziswayo zibambelele kahle ngaphandle uma indawo engaphansi ephulukiswe yi-UV ihujwa ngokwanele ukuze kuvunyelwe ukubopha ngomshini. Nakuba kunikezwa amabala angu-100% alapheka nge-UV aklanyelwe ukuthi amukele izimbotshana ezisetshenziswayo kamuva, amabala amaningi alapheka nge-UV angu-100% adinga ukuhuqwa noma zelashwe kancane (okubizwa ngesiteji “B” noma ukuphulukiswa kwamaqhuqhuva) ukuze kuthuthukiswe ukunamathela kwe-intercoat. Isiteji esithi “B” siphumela ezingosini ezisasele ezisebenzayo kusendlalelo samabala ezosabela ngokuhlanganyela ne-UV esetshenziswayo eyelaphekayo njengoba ingaphansi kwezimo zokwelashwa okuphelele. Isiteji esithi “B” siphinde sivumele ukuhuqeka okuncane ukuze kukhanye noma kusikwe noma yikuphi ukukhuphuka okusanhlamvu okungase kwenzeke ngenxa yokufakwa kwamabala. Ukufaka uphawu olubushelelezi noma ijazi lejazi kuzophumela ngokunamathela okuhle kwe-intercoat.
Okunye okukhathazayo okunamabala ayelaphekayo e-UV angu-100% kuphathelene nemibala emnyama. Amabala anombala obala kakhulu (kanye nama-pigmented coating ngokuvamile) enza kangcono uma usebenzisa amalambu e-UV aletha amandla eduzane ne-spectrum yokukhanya ebonakalayo. Amalambu e-UV ajwayelekile ahlanganiswe ne-gallium ahlanganiswe namalambu e-mercury ajwayelekile ayisinqumo esihle kakhulu. Amalambu e-UV LED akhipha u-395 nm kanye/noma angu-405 nm asebenza kangcono ngamasistimu ane-pigmented ahlobene no-365 nm kanye no-385 nm afanayo. Ngaphezu kwalokho, izinhlelo zezibani ze-UV eziletha amandla amakhulu e-UV (mW/cm2) kanye nokuminyana kwamandla (mJ/cm2) thuthukisa ukwelashwa okungcono ngebala elisetshenzisiwe noma ungqimba olunama-pigmented coating.
Okokugcina, njengakwamanye amasistimu amabala ashiwo ngenhla, ukuhlolwa kuyelulekwa ngaphambi kokusebenza nendawo yangempela ukuthi ibe namabala futhi iqedwe. Qiniseka ngaphambi kokwelashwa!
4. Ingakanani ifilimu ephezulu/encane eyakhiwe ngezimbotshana ze-UV ezingu-100%?
Izingubo zempushana ezilapheka nge-UV ngokobuchwepheshe ziyi-100% eyelapheka yi-UV, futhi ukujiya kwazo okusetshenzisiwe kukhawulelwe amandla okukhanga e-electrostatic abopha impushana phezulu lapho iqedwa. Kungcono ukufuna iseluleko somkhiqizi we-UV powder coatings.
Mayelana noketshezi oluyi-100% lwezingubo ezilapheka nge-UV, ukujiya kwefilimu emanzi esetshenziswayo kuzoholela cishe ekushubeni okufanayo kwefilimu eyomile ngemva kokwelashwa kwe-UV. Okunye ukuncipha akunakugwenywa kodwa ngokuvamile kuba nomphumela omncane. Kukhona, nokho, izinhlelo zokusebenza zobuchwepheshe ezicacisa ukubekezelelwa kokuqina kwefilimu okuqinile kakhulu noma emincane. Kulezi zimo, ukukalwa kwefilimu elashwe ngokuqondile kungenziwa ukuze kuhlotshaniswe ukuqina kwefilimu emanzi nokoma.
Ukuqina kokugcina okuphulukisiwe okungafinyelelwa kuzoncika kukhemikhali ye-UV eyelaphekayo nokuthi yenziwa kanjani. Kukhona amasistimu atholakalayo aklanyelwe ukunikeza amadiphozithi efilimu azacile kakhulu phakathi kuka-0.2 mil – 0.5 mil (5µ – 15µ) namanye anganikeza ukujiya okungaphezu kwamayintshi angu-0.5 (12 mm). Ngokuvamile, ama-UV-cured coating ane-high link-link density, njengamanye ama-urethane acrylate formulations, awakwazi ukujiya okuphezulu kwefilimu kungqimba olulodwa olusetshenzisiwe. Izinga lokuncipha lapho zelashwa lizodala ukuqhekeka okukhulu kwentolo efakwe ngokujiyile. Ukujiya okuphezulu kokwakheka noma kokuqedwa kusengafinyelelwa kusetshenziswa izimbotshana ezilapheka yi-UV zokuminyana okuphezulu kwe-cross-link ngokusebenzisa izendlalelo ezincane eziningi kanye nokufaka isihlabathi kanye/noma u-“B” phakathi kongqimba ngalunye ukuze kuthuthukiswe ukunamathela kwe-intercoat.
Indlela yokwelapha esebenzayo yezingubo eziningi ezilapheka nge-UV ibizwa ngokuthi “i-free radical initiated.” Le ndlela yokwelapha esebenzayo ingangenwa umoya-mpilo osemoyeni obambezela noma ovimbela ijubane lokwelapha. Lokhu kuncipha kuvame ukubizwa ngokuthi ukuvinjelwa komoyampilo futhi kubaluleke kakhulu lapho uzama ukuthola ukushuba kwefilimu emincane kakhulu. Emafilimini amancane, indawo engaphezulu kumthamo ophelele wento esetshenziswayo iphakeme uma iqhathaniswa nogqinsi lwefilimu. Ngakho-ke, ukuqina kwefilimu emincane kusengozini kakhulu ekuvinjweni komoya-mpilo futhi zelapheka kancane kakhulu. Imvamisa, ingaphezulu lesiphetho lihlala lingelapheki ngokwanele futhi libonisa umuzwa onamafutha/onamafutha. Ukuze kuvinjwe ukuvinjelwa komoya-mpilo, amagesi angasebenzi njenge-nitrogen ne-carbon dioxide angadluliswa phezu komhlaba phakathi nokwelashwa ukuze kukhishwe ukugcwala komoya-mpilo, ngaleyo ndlela kuvumele ukwelashwa okugcwele, nokusheshayo.
5. Kucace kangakanani ukunameka kwe-UV okucacile?
I-100% yezingubo ezilapheka nge-UV zingabonisa ukucaca okuhle kakhulu futhi zizoncintisana namajazi acacile angcono kakhulu embonini. Ukwengeza, uma zifakwa okhunini, ziveza ubuhle nokujula kwesithombe. Okuthakazelisa kakhulu izinhlelo ezihlukahlukene ze-aliphatic urethane acrylate ezicace ngokuphawulekayo futhi ezingenambala uma zisetshenziswa ezindaweni ezihlukahlukene, kuhlanganise nokhuni. Ngaphezu kwalokho, i-aliphatic polyurethane acrylate coatings izinzile futhi imelana nokuguquka kombala ngokuya ngeminyaka. Kubalulekile ukuveza ukuthi izigqoko ezicwebezelayo eziphansi zisakaza ukukhanya kakhulu kunezingubo ezicwebezelayo futhi ngaleyo ndlela zizoba nokucaca okuphansi. Ngokuphathelene namanye amakhemikhali okugcoba, nokho, i-100% ye-UV-curable coatings iyalingana uma ingekho phezulu.
Izingubo ezilapheka ezibangelwa amanzi-UV ezitholakalayo ngalesi sikhathi zingakhiwa ukuze zinikeze ukucaciseleka okukhethekile, ukufudumala kwezinkuni kanye nokusabela okuqhudelana nezinhlelo zokuqeda ezivamile ezingcono kakhulu. Ukucaca, ukucwebezela, ukuphendula ngokhuni kanye nezinye izici ezisebenzayo zezingubo ezilaphekayo ze-UV ezitholakala emakethe namuhla zinhle kakhulu uma zitholwa kubakhiqizi bekhwalithi.
6. Ingabe akhona ama-UV anombala noma anemibala eyelaphekayo?
Yebo, izimbotshana ezinombala noma ezinombala zitholakala kalula kuzo zonke izinhlobo zezingubo ezilapheka nge-UV kodwa kunezici okufanele zicatshangelwe ukuze uthole imiphumela emihle. Isici sokuqala nesibaluleke kakhulu iqiniso lokuthi imibala ethile iphazamisa ikhono lamandla e-UV ukudlulisa, noma ukungena, kumajikijolo asetshenziswayo alapheka yi-UV. I-spectrum ye-electromagnetic ikhonjisiwe ku-Image 1, futhi kungabonakala ukuthi i-spectrum yokukhanya ebonakalayo iseduze ne-UV spectrum. I-spectrum iwukuqhubeka ngaphandle kwemigqa ecacile (ama-wavelengths) yokuhlukanisa imingcele. Ngakho-ke, isifunda esisodwa sihlangana kancane kancane sibe isifunda esiseduze. Uma kubhekwa indawo yokukhanya ebonakalayo, kunezinsolo zesayensi zokuthi isuka ku-400 nm iye ku-780 nm, kanti ezinye izimangalo zithi isuka ku-350 nm iye ku-800 nm. Kule ngxoxo, kubalulekile kuphela ukuthi siqaphele ukuthi imibala ethile ingavimba ngempumelelo ukudluliswa kwamaza wamaza athile e-UV noma imisebe.
Njengoba kugxilwe kubude beza be-UV noma isifunda semisebe, ake sihlole leyo ndawo ngokuningiliziwe. Isithombe sesi-2 sibonisa ubudlelwano phakathi kwe-wavelength yokukhanya okubonakalayo nombala ohambisanayo osebenza ngempumelelo ekukuvimbeni. Kubalulekile futhi ukwazi ukuthi imibala emibalabala ivamise ukunwebeka ebangeni lamaza amaza ukuze umbala obomvu udlulele kububanzi obuningi kangangokuthi ungamunca kancane endaweni ye-UVA. Ngakho-ke, imibala ekhathazayo kakhulu izokwengeza uhla oluphuzi - osawolintshi - olubomvu futhi le mibala ingaphazamisa ukwelapha okusebenzayo.
Akukhona nje ukuthi ama-colorants aphazamisa ukuphulukiswa kwe-UV, aphinde abe nokucatshangelwa uma usebenzisa izimbotshana ezinombala omhlophe, njengama-primer alaphekayo e-UV kanye nopende bejazi eliphezulu. Cabangela i-spectrum yokumunca kwe-white pigment titanium dioxide (TiO2), njengoba kukhonjisiwe kusithombe 3. I-TiO2 ibonisa ukumunca okunamandla kakhulu endaweni yonke ye-UV kodwa nokho, okumhlophe, okulapheka kwe-UV kwelapheka ngokuphumelelayo. Kanjani? Impendulo itholakala ekwakhiweni okucophelelayo komthuthukisi kanye nomkhiqizi wokumboza ngekhonsathi nokusetshenziswa kwezibani ezifanele ze-UV ukuze zelashwe. Amalambu e-UV ajwayelekile, ajwayelekile asetshenziswayo akhipha amandla njengoba kuboniswe kusithombe sesi-4.
Isibani ngasinye esibonisiwe sisekelwe ku-mercury, kodwa ngokufaka i-mercury ngenye into eyinsimbi, ukukhishwa kungashintshela kwezinye izifunda zobude beza. Endabeni yama-TiO2 asekelwe, amhlophe, ayelapheka e-UV, amandla alethwa yisibani esijwayelekile se-mercury azovinjelwa ngempumelelo. Amanye amaza amaza aphakeme alethwayo anganikeza ikhambi kodwa ubude besikhathi obudingekayo ukuze zelashwe ngokugcwele kungenzeka bungasebenzi. Ngokusebenzisa i-doping isibani se-mercury nge-gallium, nokho, kukhona insada yamandla awusizo endaweni engavinjwanga ngempumelelo yi-TiO2. Ukusebenzisa inhlanganisela yazo zombili izinhlobo zezibani, kokubili ngokwelapha (ukusebenzisa i-gallium doped) kanye nokwelapha okungaphezulu (ukusebenzisa i-mercury evamile) kungenziwa (Isithombe 5).
Okokugcina, okunamathelayo okunombala noma okunemibala ekwelaphekayo kwe-UV kudinga ukwakhiwa kusetshenziswa izithwebuli zezithombe ezifanele ukuze amandla e-UV - ububanzi obubonakalayo bobude beza lokukhanya obulethwa amalambu - busetshenziswe ngendlela efanele ukuze zelashwe ngempumelelo.
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U-Lawrence (Larry) Van Iseghem ungumongameli/i-CEO ye-Van Technologies, Inc. I-Van Technologies inesipiliyoni seminyaka engaphezu kwengu-30 kwezingubo ezilapheka nge-UV, eqale njengenkampani ye-R&D kodwa yashintsha ngokushesha yaba umkhiqizi we-Application Specific Advanced Coatings™ enikezela ngezingubo zezimboni. izinsiza emhlabeni jikelele. Izembatho ezelapheka nge-UV bezilokhu zigxile kakhulu, kanye nobunye ubuchwepheshe bokumboza "Okuhlaza", kugcizelelwa ekusebenzeni okulingana noma ukwedlula ubuchwepheshe obujwayelekile. I-Van Technologies yenza uhlobo lwe-GreenLight Coatings™ lwezingubo zezimboni ngokuvumelana ne-ISO-9001:2015 uhlelo lokuphatha ikhwalithi eqinisekisiwe. Ukuze uthole ulwazi olwengeziwe, vakashelawww.greenlightcoatings.com.
Isikhathi sokuthumela: Jul-22-2023
