UV curing thev naus laus zis tau hloov pauv kev lag luam luam ntawv, muab sijhawm kho sai dua, nce kev tsim khoom thiab txo kev siv zog.Txawm li cas los xij, muaj cov pa oxygen thaum lub sijhawm kho tuaj yeem muaj kev cuam tshuam loj rau kev ua haujlwm ntawm UV curing ntawm inks.
Oxygen inhibition tshwm sim thaum cov pa oxygen molecules cuam tshuam nrog dawb radical polymerization, uas ua rau kev kho tsis tiav thiab kev ua haujlwm tsis zoo ntawm tus number case.Qhov no tshwm sim tshwj xeeb tshaj yog nyob rau hauv inks uas nyias thiab muaj ib tug siab deg cheeb tsam rau ntim piv.
Thaum UV curable inks raug rau ambient huab cua, oxygen molecules yaj nyob rau hauv tus number case formulation thiab oxygen diffused los ntawm huab cua tuaj yeem cuam tshuam nrog cov txheej txheem polymerization.Qhov qis qis ntawm cov pa oxygen yaj tau yooj yim noj los ntawm cov thawj reactive dawb radicals, uas ua rau lub sij hawm polymerization induction.Ntawm qhov tod tes, oxygen tas li diffusing rau hauv tus cwj mem los ntawm ib puag ncig sab nraud dhau los ua qhov tseem ceeb ntawm inhibition.
Cov txiaj ntsig ntawm oxygen inhibition tuaj yeem suav nrog lub sijhawm kho ntev dua, qhov nplaum nplaum thiab tsim cov qauv oxidized ntawm tus number case.Cov teebmeem no tuaj yeem txo qhov hardness, gloss thiab khawb tsis kam ntawm tus number case kho thiab cuam tshuam rau nws lub sijhawm ntev.
Kom kov yeej cov kev cov nyom no, cov kws tshawb fawb thiabUV LED manufacturerstau tshawb nrhiav ntau yam tswv yim.
Thawj yog los hloov cov tshuaj tiv thaiv mechanism.Los ntawm kev txhim kho cov txheej txheem photoinitiator, qhov chaw oxygen inhibition ntawm tus cwj mem kho tuaj yeem ua kom zoo.
Ua kom cov concentration ntawm photoinitiators yog lwm txoj hauv kev los txo cov teebmeem ntawm oxygen inhibition.Los ntawm kev ntxiv ntau cov photoinitiators, tus number case formulation ua ntau resistant rau oxygen inhibition.Qhov no ua rau ntau dua number case hardness, zoo adhesion thiab siab dua gloss tom qab kho.
Tsis tas li ntawd, nce kev siv ntawm UV kho cov cuab yeej hauv cov cuab yeej kho mob pab txo qis qhov tsis zoo ntawm oxygen inhibition.Los ntawm kev ua kom lub zog ntawm UV teeb qhov chaw, cov txheej txheem kho tau zoo dua thiab them nyiaj rau qhov txo qis los ntawm kev cuam tshuam cov pa oxygen.Cov kauj ruam no yuav tsum tau ua tib zoo calibrated los xyuas kom meej kev kho kom zoo yam tsis muaj kev puas tsuaj rau lub substrate los yog ua rau lwm yam kev phiv.
Thaum kawg, oxygen inhibition tuaj yeem txo tau los ntawm kev ntxiv ib lossis ntau dua oxygen scavengers rau cov khoom luam ntawv.Cov scavengers no hnov mob nrog oxygen kom txo nws cov concentration, thiab ua ke ntawm kev siv siabLED UV curing systemthiab cov pa oxygen scavenger tuaj yeem txo qhov cuam tshuam ntawm cov pa oxygen ntawm cov txheej txheem kho.Nrog cov kev txhim kho no, cov tuam ntxhab tuaj yeem ua tiav kev kho kom zoo dua qub thiab kov yeej cov teeb meem ntawm oxygen inhibition.
Post lub sij hawm: Jan-19-2024