Okokuqala, ii-Aqueous (ezisekelwe emanzini) kunye nee-UV coatings ziye zasetyenziswa kakhulu kwi-Graphics Arts Industry njengee-top coats ezikhuphisanayo. Zombini zibonelela ngokuphucula ubuhle kunye nokukhusela, zongeza ixabiso kwiintlobo ngeentlobo zeemveliso eziprintiweyo.
Umahluko kwiindlela zokuNyanga
Ngokusisiseko, iindlela zokomisa okanye zokunyanga zezi zimbini zahlukile. Iingubo zamanzi zoma xa izinto ezigudileyo (ezifikelela kwi-60% yamanzi) zinyanzelwa ukuba ziphele okanye zifunxwe ngokuyinxenye kwi-substrate enemingxuma. Oku kuvumela izinto eziqinileyo zeengubo ukuba zihlangane ukuze zenze ifilimu ebhityileyo, eyomileyo xa uyichukumisa.
Umahluko kukuba ii-UV coatings zenziwe kusetyenziswa ii-100% ze-solids liquid components (akukho volatiles) eziphilisa okanye ezi-photopolymer kwi-photochemical cross-linking reaction engenamandla aneleyo xa ibonakaliswa kukukhanya okukhawulezileyo kwe-short wavelength ultraviolet (UV). Inkqubo yokunyanga ibangela utshintsho olukhawulezileyo, iguqula ulwelo lube zi-solids endaweni yoko nangoko (cross-linking) yenze ifilimu eqinileyo neyomileyo.
Umahluko kwiZixhobo zoSetyenziso
Ngokuphathelele izixhobo zokusetyenziswa, zombini ii-aqueous aqueous kunye ne-UV coatings eziphantsi kwe-viscosity zingasetyenziswa ngokufanelekileyo kusetyenziswa i-inker yokugqibela kwiinkqubo zokuprinta i-ink ye-flexo kunye ne-gravure liquid. Ngokwahlukileyo koko, iinkqubo zokuprinta i-inki ye-offset litho paste yewebhu kunye ne-sheet-fed zifuna ukuba kongezwe i-press-end coater ukuze kusetyenziswe ii-aqueous okanye ii-UV low viscosity coatings. Iinkqubo zesikrini nazo zisetyenziselwa ukufaka ii-UV coatings.
Iiprinta zeFlexo kunye negravure zinomthamo wokomisa we-inki ofunekayo kunye nowe-aqueous osele ufakiwe ukuze komiswe kakuhle ii-aqueous coatings. Iinkqubo zokuprinta ze-Web offset heat set nazo zibonakalisiwe ukuba zinamandla okomisa afunekayo ukuze komiswe ii-aqueous coatings. Nangona kunjalo, yinto eyahlukileyo xa ucinga ngenkqubo yokuprinta i-offset litho efakwe amaphepha. Apha ukusetyenziswa kwee-aqueous coatings kufuna ukufakwa kwezixhobo ezizodwa zokomisa eziquka ii-infrared emitters, iimela zomoya oshushu, kunye nezixhobo zokukhupha umoya.
Umahluko kwixesha lokomisa
Ukuhanjiswa okwandisiweyo kuyacetyiswa kwakhona ukuze kubonelelwe ngexesha elongezelelweyo lokomisa. Xa ucinga ngokumisa (ukunyanga) kweengubo ze-UV okanye ii-inki, umahluko ukwihlobo lwezixhobo ezikhethekileyo zokumisa (ukunyanga) ezifunekayo. Iinkqubo zokunyanga ze-UV ngokuyintloko zibonelela ngokukhanya kwe-UV okunikezelwa zizibane ze-mercury arc zoxinzelelo oluphakathi, okanye imithombo ye-LED enomthamo owaneleyo wokunyanga ngokufanelekileyo ngesantya esifunekayo somgca.
Iingubo zamanzi zoma ngokukhawuleza kwaye kufuneka kuqwalaselwe ukucoca ngexesha lokumiswa kwengcinezelo. Umahluko kukuba iingubo ze-UV zihlala zivulekile xa zicinezelwe logama nje kungekho kukhanya kwe-UV. Ii-inki ze-UV, iingubo, kunye neevarnish azizomisi okanye azivale iiseli ze-anilox. Akukho mfuneko yokucoca phakathi kokusetyenziswa kwengcinezelo okanye ngempelaveki, nto leyo enciphisa ixesha lokungasebenzi kunye nenkcitho.
Zombini iingubo zamanzi kunye ne-UV zinokubonelela ngokukhanya okuphezulu, kunye noluhlu lweendlela zokugqiba ukusuka kwi-gloss ephezulu, ukuya kwi-satin ukuya kwi-matte. Umahluko kukuba iingubo ze-UV zinokubonelela ngokugqitywa okuphezulu kakhulu kwe-gloss kunye nobunzulu obubonakalayo.
Umahluko kwiingubo
Iingubo zamanzi zihlala zibonelela ngokumelana okuhle nokugutyulwa, ukubola, kunye nokuthintela iibhloko. Iimveliso zengubo zamanzi ezenziwe ngokukodwa zinokubonelela ngokumelana namafutha, utywala, i-alkali, kunye nokufuma. Umahluko kukuba iingubo ze-UV zihlala zihamba phambili, zibonelela ngokumelana okungcono kakhulu nokukrazuka, ukubola, ukuvaleka, iikhemikhali kunye nokuxhathisa imveliso.
Iingubo zamanzi ze-thermoplastic ze-litho ezifakwe i-sheet-fed offset zenziwe ngendlela yokubamba amanzi kwi-in-line phezu kwee-inki ze-paste ezomisa kancinci, nto leyo enciphisa okanye ephelisa isidingo se-spray powder esetyenziselwa ukuthintela i-inki ukuba ingawi. Ubushushu beenqwaba kufuneka bugcinwe bukwi-85-95®F ukuze kuthintelwe ukuthamba kwengubo eyomileyo kumaqondo obushushu aphezulu, kunye nethuba lokuphuma nokuvaleka. Okuhle kukuba, imveliso iphucukile njengoko amaphepha agqunyiweyo anokucutshungulwa ngakumbi ngokukhawuleza.
Umahluko kukuba ii-UV coatings ezisetyenziswa kwi-line wet trapping phezu kwee-inki ze-UV ziyanyangeka xa zicinezelwa, kwaye amaphepha anokucutshungulwa ngakumbi ngoko nangoko. Xa i-UV coatings ingaphezulu kwee-inki ze-litho zesiqhelo zithathwa njenge-aqueous primers, kuyacetyiswa ukuba zitywinwe kwaye zinamathele kwii-inki ukuze zibe sisiseko se-UV coatings. Ii-inki ze-hybrid UV/zesiqhelo zingasetyenziselwa ukurhoxisa imfuneko ye-primer.
Impembelelo Kubantu, Ukutya, kunye Nendalo Esingqongileyo
Iingubo zamanzi zibonelela ngomoya ococekileyo, i-VOC ephantsi, akukho alcohol, akukho vumba liphantsi, akukho shushu, akukho tyhefu, kwaye akukho bungozi. Ngokufanayo, iingubo ze-UV eziqinileyo eziyi-100% azivelisi kukhutshwa kwe-solvent, akukho VOC, kwaye azitshi. Umahluko kukuba iingubo ze-UV ezimanzi ezinganyangwanga ziqulethe izinto ezisabelayo ezinokuba nevumba elibukhali, kwaye zinokuhluka ukusuka kokuncinci ukuya kokubi njengezinto ezicaphukisayo, ezinokubangela ukusabela kwe-allergy kwabanye abantu. Ukudibana kolusu namehlo kufuneka kuthintelwe. Kwinqaku elihle, izinto ezinyangwa yi-UV zibizwa ngokuba "yiTekhnoloji yoLawulo oluBalaseleyo" (BACT) yi-EPA, ukunciphisa ii-VOC, ukukhutshwa kwe-CO2, kunye neemfuno zamandla.
Iingubo zamanzi zichaphazeleka kukutshintsha kobume ngexesha lokucinezela ngenxa yokuphuma komoya kwiintsholongwane, kunye nefuthe le-Ph. Umahluko yi-100% yezinto eziqinileyo iingubo ze-UV zigcina ubume xa zicinezelwe logama nje kungekho kukhanya kwe-UV.
Iingubo zamanzi ezomileyo ziyaphinda zisetyenziswe, ziyabola kwaye ziyaphinda zisetyenziswe. Umahluko kukuba ngelixa iingubo ze-UV ezicociweyo ziphinda zisetyenziswe kwaye ziyaphinda zisetyenziswe, zicotha ukubola. Oku kungenxa yokuba izinto zokugquma ezidibanisa amakhonkco,
ezivelisa zombini iipropati eziphezulu zokuxhathisa emzimbeni nakwiikhemikhali.
Iingubo zamanzi zomile ngokucwebezela kwamanzi ngaphandle kokutyheli okunxulumene nokuguga. Umahluko kukuba iingubo ze-UV ezicociweyo nazo zinokubonakala zicacile, kodwa kufuneka kuqatshelwe xa kusenziwa kuba ezinye izinto eziluhlaza zinokubangela ukuba tyheli.
Iingubo zamanzi ziyakwazi ukuhambelana nemigaqo ye-FDA yokudibana kokutya okomileyo kunye/okanye okumanzi okunamafutha. Umahluko kukuba iingubo ze-UV, ngaphandle kweendlela ezithile ezimbalwa, azikwazi ukuhambelana nemigaqo ye-FDA yokudibana kokutya okomileyo okanye okumanzi/okunamafutha ngokuthe ngqo.
Iinzuzo
Ngaphandle kokwahluka, ii-coating zamanzi kunye ne-UV zabelana ngeenzuzo ezininzi ngokwamanqanaba ahlukeneyo. Umzekelo, iifomyula ezithile zinokubonelela ngokumelana nobushushu, igrisi, utywala, i-alkali, kunye nokufuma. Ukongeza, zinokubonelela ngokumelana nokunamathela okanye iglu, uluhlu lwe-COF, amandla okushicilela, ukwamkeleka kwefoyile eshushu okanye ebandayo, amandla okukhusela ii-inki zesinyithi, imveliso eyonyukileyo, ukucubungula ngaphakathi, amandla okusebenza nokujika, ukonga amandla, akukho kuseta, kwaye kwi-sheetfed offset ukususwa kwe-spray powder.
Ishishini lethu kwiCork Industries kukuphuhliswa nokwenziwa kwezinto zokugquma kunye nezincamathelisi ezikhethekileyo ze-Aqueous, energy-curing Ultraviolet (UV), kunye ne-Electron Beam (EB). ICork iyaphumelela kubuchule bayo bokwenza iimveliso ezintsha neziluncedo ezikhethekileyo ezibonelela ngeprinta/i-coater kushishino lobugcisa bemizobo inzuzo yokukhuphisana.
Ixesha leposi: Matshi-21-2025
