UV LED teeb ua lub teeb pom kev zoo, nws txoj hauv kev kho yog hais txog UV inks tom qab UV irradiation tshwm sim los ntawm photoinitiator, yog li tsim cov dawb radicals lossis ions. Cov dawb radicals los yog ions thiab pre-polymers los yog unsaturated monomers nyob rau hauv ob daim ntawv cog lus cross-linking cov tshuaj tiv thaiv, tsim ntawm monomer genes, cov monomer noob pib saws cov tshuaj tiv thaiv los tsim cov khoom polymer deb ntawm lub molecule.
Muaj ntau yam tseem ceeb uas cuam tshuam rau UV LED kho:
Curing cov yam ntxwv
Lub curing ceev thiab efficiency ntawmUV LED curing khoomfeem ntau nyob ntawm qhov nyuaj ntawm lub teeb kom ua rau cov molecules hauv cov ntaub ntawv kho. UV curing yog txiav txim los ntawm kev sib tsoo ntawm photons thiab molecules. Lub teeb ua rau cov molecules diffuse uniformly los ntawm cov khoom. Ntxiv nrog rau cov yam ntxwv ntawm cov cuab yeej kho, cov khoom kho qhov muag thiab cov thermodynamic ntawm cov ntaub ntawv kho thiab lawv cov kev cuam tshuam nrog lub zog hluav taws xob muaj qhov cuam tshuam loj rau cov txheej txheem kho.
Spectral Absorption Rate
Tus nqi ntawm lub teeb lub zog absorbed los ntawm UV txheej thaum lawv nce nyob rau hauv thickness yog hu ua spectral absorption tus nqi. Lub zog ntau absorbed nyob ze ntawm qhov chaw, lub zog tsawg dua yog khaws cia rau hauv cov txheej sib sib zog nqus. Txawm li cas los xij, qhov xwm txheej no txawv ntawm qhov sib txawv wavelengths. Tag nrho cov spectral absorption tus nqi suav nrog cov teebmeem ntawm lub teeb ua, cov tshuaj monomolecular, oligomers, additives thiab pigments.
Reflection thiab tawg
Tsis yog kev nqus, lub teeb lub zog cuam tshuam los ntawm kev hloov pauv ntawm tus cwj mem, ua rau muaj kev cuam tshuam thiab tawg. Qhov no feem ntau yog tshwm sim los ntawm cov khoom siv matrix lossis pigments hauv cov khoom kho tau. Cov yam tseem ceeb no txo cov nqi ntawm UV zog mus txog qhov tob tob, tab sis txhim kho kev kho kom zoo ntawm qhov chaw tshuaj tiv thaiv.
Infrared absorption tus nqi thiab tsim nyog UV wavelength
Qhov kub thiab txias muaj qhov cuam tshuam loj rau qhov ceev ntawm cov tshuaj tiv thaiv kab mob, thiab qhov kub thiab txias thaum lub sij hawm cov tshuaj tiv thaiv kuj plays lub luag hauj lwm. Txawv UV inks xav tau UV wavelength sib txawv rau kev kho. Thaum xaiv ib chav tsev kho mob, nws yog ib qho tseem ceeb uas yuav tau xaiv ib qho uas haum rau lub wavelength xav tau los ntawm UV txheej. Siv aUV LED curing unitnrog qhov tseeb wavelength yuav muab kev kho kom zoo dua.
Post lub sij hawm: Jan-17-2024