Okokuqala nokubaluleke kakhulu, izembozo ze-Aqueous (ezisekelwe emanzini) kanye ne-UV ziye zasetshenziswa kabanzi embonini yezobuciko bezithombe njengezembozo eziphezulu ezincintisanayo. Zombili zinikeza ukuthuthukiswa kobuhle kanye nokuvikelwa, okwengeza inani emikhiqizweni eyahlukahlukene ephrintiwe.
Umehluko Ezindleleni Zokwelapha
Ngokuyisisekelo, izindlela zokomisa noma zokupholisa zalezi zinto ezimbili zihlukile. Ukwembozwa kwamanzi kuyoma lapho izingxenye zekwembozwa eziguquguqukayo (cishe amanzi angu-60%) ziphoqeleka ukuba zihwamuke noma zimuncwe ingxenye ethile kwi-substrate enezimbobo. Lokhu kuvumela ukuthi izinto eziqinile zekwembozwa zihlangane ukuze zakhe ifilimu encane, eyomile uma uyithinta.
Umehluko ukuthi izembozo ze-UV zakhiwe kusetshenziswa izingxenye zoketshezi eziyi-100% eziqinile (azikho izinto eziguquguqukayo) eziphilisa noma ezi-photopolymerize ekusabeleni kwe-photochemical cross-linking okunamandla aphansi lapho kuvezwa ekukhanyeni okukhulu kwe-ultraviolet (UV) yamaza amafushane. Inqubo yokwelapha ibangela ushintsho olusheshayo, iguqula uketshezi lube izinto eziqinile ngokushesha (cross-linking) yakha ifilimu eyomile eqinile.
Umehluko Emishinini Yokufaka Isicelo
Ngokuphathelene nemishini yokusebenzisa, kokubili izembozo zamanzi ezi-viscosity eziphansi kanye ne-UV zingasetshenziswa ngempumelelo kusetshenziswa i-inker yokugcina ezinqubweni zokuphrinta i-flexo & gravure liquid. Ngokuphambene nalokho, izinqubo zokuphrinta i-inki ezifakwe i-web kanye ne-sheet-fed offset litho paste zidinga ukuthi kufakwe i-press-end coater ukuze kufakwe izembozo zamanzi noma ze-UV ezi-viscosity eziphansi. Izinqubo zesikrini nazo zisetshenziselwa ukufaka izembozo ze-UV.
Imishini yokunyathelisa ye-Flexo ne-gravure inamandla okomisa ayinki adingekayo kanye ne-solvent aquious kakade afakiwe ukuze kome kahle i-aqueous coatings. Izinqubo zokunyathelisa ze-Web offset heat set nazo ziboniswe ukuthi zinamandla okomisa aquious coatings. Kodwa-ke, kuyinto ehlukile uma ucabangela inqubo yokunyathelisa ye-offset litho efakwe amashidi. Lapha ukusetshenziswa kwe-aqueous coatings kudinga ukufakwa kwemishini ekhethekile yokomisa equkethe ama-infrared emitters, imimese yomoya oshisayo, kanye namadivayisi okukhipha umoya.
Umehluko Esikhathini Sokomisa
Ukulethwa isikhathi eside kuyanconywa futhi ukuze kunikezwe isikhathi esengeziwe sokomisa. Uma ucabangela ukomisa (ukwelapha) kwezembozo ze-UV noma uyinki, umehluko usehlotsheni lwemishini ekhethekile yokomisa (ukwelapha) edingekayo. Izinhlelo zokomisa ze-UV zihlinzeka kakhulu ngokukhanya kwe-UV okunikezwa izibani ze-mercury arc ezicindezelwe kahle, noma imithombo ye-LED enamandla anele okwelapha ngempumelelo ngesivinini esidingekayo somugqa.
Izimbozo zamanzi zoma ngokushesha futhi kufanele kuqashelwe ukuhlanza ngesikhathi sokuma kokucindezela. Umehluko ukuthi izimbozo ze-UV zihlala zivulekile uma zicindezelwa inqobo nje uma kungekho ukukhanya kwe-UV. Uyinki we-UV, izimbozo, nama-varnish awomisi noma avale amaseli e-anilox. Asikho isidingo sokuhlanza phakathi kokusebenzisa ukucindezela noma ngempelasonto, okunciphisa isikhathi sokungasebenzi kanye nokuchitha.
Zombili izembozo zamanzi neze-UV zinganikeza ukukhanya okuphezulu, kanye nobubanzi bokuqedwa kusukela ekukhanyeni okuphezulu, kuya ku-satin kuya ku-matte. Umehluko ukuthi izembozo ze-UV zinganikeza ukuqedwa okuphezulu kakhulu okukhazimulayo okunobubanzi obubonakalayo.
Umehluko Ekugqokeni
Izembozo zamanzi ngokuvamile zinikeza ukumelana okuhle kokuhlikihla, ukubola, kanye nokuvimba. Imikhiqizo yezembozo zamanzi eklanywe ngokukhethekile inganikeza nokumelana namafutha, utshwala, i-alkali, kanye nomswakama. Umehluko ukuthi izembozo ze-UV ngokuvamile ziya phambili, zinikeza ukumelana okungcono kakhulu kokuklwebheka, ukubola, ukuvimba, amakhemikhali, kanye nomkhiqizo.
Izimbozo zamanzi ze-thermoplastic ze-litho ezifakwe amashidi zakhiwe ukuze zibe yi-inline wet trap phezu kwe-inki ye-paste eyomisa kancane, okunciphisa noma kuqede isidingo se-spray powder esetshenziselwa ukuvimbela i-inki offset. Izinga lokushisa lenqwaba lidinga ukugcinwa liphakathi kuka-85-95®F ukuze kugwenywe ukuthamba kwe-coating eyomile emazingeni okushisa aphezulu, kanye nethuba lokuphuma nokuvinjelwa. Ngokunenzuzo, umkhiqizo uyathuthuka njengoba amashidi amboziwe engacutshungulwa ngokushesha.
Umehluko ukuthi izembozo ze-UV ezisetshenziswa emgqeni wokubamba okumanzi phezu kwe-inki ye-UV zombili ziyaphola lapho zicindezelwa, futhi amashidi angase acutshungulwe ngokushesha. Uma izembozo ze-UV phezu kwe-inki ye-litho evamile kubhekwa njenge-primer yamanzi, kunconywa ukuthi zivale futhi zinamathele ku-inki ukuze zinikeze isisekelo sezembozo ze-UV. Uyinki we-UV/ojwayelekile ohlanganisiwe ungasetshenziswa ukucisha isidingo se-primer.
Ithonya Kubantu, Ukudla, kanye Nemvelo
Izembozo zamanzi zinikeza umoya ohlanzekile, i-VOC ephansi, akukho utshwala, iphunga eliphansi, ukungashi, ukungabi nobuthi, kanye nezakhiwo ezingangcolisi. Ngokufanayo, izembozo ze-UV eziqinile eziyi-100% azikhiphi ukukhishwa kwe-solvent, akukho VOC, futhi azishisi. Umehluko ukuthi izembozo ze-UV ezimanzi ezingalapheki ziqukethe izingxenye ezisebenzayo ezingaba nephunga elibukhali, futhi zingaba zimbi kakhulu njengezicasulayo, ezingabangela ukusabela kokungezwani komzimba kwabanye abantu. Ukuxhumana kwesikhumba namehlo kufanele kugwenywe. Ngendlela enhle, izinto zokwelapha ze-UV zibizwa ngokuthi “Ubuchwepheshe Bokulawula Obutholakala Kakhulu” (BACT) yi-EPA, okunciphisa ama-VOC, ukukhishwa kwe-CO2, kanye nezidingo zamandla.
Izembozo zamanzi zingase zishintshe ukuhambisana phakathi nokucindezela ngenxa yokuhwamuka kwe-volatiles, kanye nethonya le-Ph. Umehluko uwukuthi i-UV eqinile engu-100% igcina ukuhambisana ekucindezelweni uma nje kungekho ukuchayeka ekukhanyeni kwe-UV.
Izembozo zamanzi ezomile zingasetshenziswa kabusha, zibola futhi ziphinde zisetshenziswe. Umehluko uwukuthi yize izembozo ze-UV ezilungisiwe ziphinde zisetshenziswe futhi ziphinde zisetshenziswe, ziphuza ukubola. Lokhu kungenxa yokuthi izingxenye zezembozo ze-curing cross-links,
okukhiqiza kokubili izakhiwo eziphakeme zomzimba kanye namakhemikhali.
Izembozo zamanzi zomile ngokucwebezela kwamanzi ngaphandle kokushintshashintsha okuhlobene nokuguga. Umehluko ukuthi izembozo ze-UV ezivuvukile nazo zingabonisa ukucaca okuphezulu, kodwa kufanele kuqashelwe lapho kwenziwa ngoba ezinye izinto zokusetshenziswa zingadala ukuphenduka okuphuzi.
Izembozo zamanzi ziyakwazi ukuhambisana nemithetho ye-FDA kokubili ukuthintana kokudla okomile kanye/noma okumanzi okunamafutha. Umehluko ukuthi izembozo ze-UV, ngaphandle kwezakhi ezithile ezilinganiselwe kakhulu, azikwazi ukuhambisana nemithetho ye-FDA yokuthintana ngqo kokudla okomile noma okumanzi/okunamafutha.
Izinzuzo
Ngaphandle kokwehluka, izembozo zamanzi ne-UV zihlanganyela izinzuzo eziningi ngamazinga ahlukahlukene. Isibonelo, amafomula athile anganikeza ukumelana nokushisa, amafutha, utshwala, i-alkali, kanye nomswakama. Ngaphezu kwalokho, anganikeza ukumelana nokunamathela noma i-glue, ububanzi be-COF, ikhono lokunyathelisa, ukwamukelwa kwe-foil eshisayo noma ebandayo, ikhono lokuvikela uyinki wensimbi, umkhiqizo owandisiwe, ukucubungula okusemgqeni, ikhono lokusebenza nokujika, ukonga amandla, akukho ukusetha kabusha, kanye nokususa i-spray powder efakwe ephepheni.
Ibhizinisi lethu eCork Industries liwukuthuthukiswa kanye nokwakheka kwezembozo ezikhethekile ze-Aqueous, energy-curing Ultraviolet (UV), kanye ne-Electron Beam (EB). I-Cork iyachuma ngekhono layo lokwakha imikhiqizo ekhethekile emisha newusizo enikeza iphrinta/i-coater embonini yobuciko bezithombe inzuzo yokuncintisana.
Isikhathi sokuthunyelwe: Mashi-21-2025
