Advanced Facilities Efficient ProductionCov tshuaj pleev xim rau lub ntsej muag yog cov khoom uas hloov cov kua dej qub mus rau hauv cov khoom siv los ntawm cov tshuaj lom neeg los ntawm lub teeb ci ci ultraviolet, thiab cov kua roj vanish thiab kua cwj mem siv rau cov ntim zaub mov tsis muaj qhov tshwj xeeb. Daim duab-cov khoom tsim cov qauv no feem ntau yog ua los ntawm oligomers (resins), cov tshuaj tiv thaiv monomers, photoinitiators, pigments thiab cov pabcuam, thiab ib qho ntawm cov khoom siv no tsis tuaj yeem siv tshuaj rau hauv polymer network. Muaj cov peev xwm khiav mus los rau cov khoom siv ua kua.
Photoinitiators tuaj yeem faib ua ob hom, ib qho yog hom I photoinitiator uas nthawv los ua kom dawb radicals, thiab lwm qhov yog hom II photoinitiator uas yuav tsum tau siv tus neeg sib koom ua ke lossis tus tsim.
Benzophenone derivatives, tshwj xeeb ketones ntawm α-hydroxy thiab α-amino pawg, thiab acylphosphine oxides feem ntau yog siv hom I kev pib ua. Thaum cov c-hydroxybenzophenone lwg me me tsis sib haum nrog UV lub teeb, nws daim ntawv cog lus ua ntej cov pab pawg hydroxyl thiab cov rog α-carbon tawg. Piv txwv, cov duab sib txuas 1173 photoinitiator 2-hydroxy-2-methylpropiophenone yuav tsim cov benzoyl radical thiab 2-hydroxy-2-propyl radical tom qab cleavage, raws li pom hauv daim duab hauv qab no. Ob qho ntawm cov dawb radicals muaj siab reactivity thiab tuaj yeem pib ua polymerization. Yog li ntawd, nyob rau qhov xwm txheej ntawm qhov zoo tagnrho 100% hloov dua siab tshiab, txhua tus ntawm cov photoinitiators tuaj yeem hnov mob rau hauv lub network polymer.
Cov sawv cev tseem ceeb ntawm hom II photoinitiators yog benzophenones, zoo li thioxanthone derivatives. Noj cov benzophenone ua piv txwv, piv txwv li, UV teeb, cov lwg me me tau qhib thiab nyob twj ywm hauv lub xeev triplet. Nyob rau hauv muaj cov pa roj carbon monoxide coine xws li amine, cov xaim hluav taws xob tau hloov los ntawm tus txheej txheem sib koom ua ke mus rau benzophenone, tom qab ntawd cov kua qaub ua kom hloov pauv los ua ib qho amino radical thiab hydroxyl radical. Cov kev ua ntawm lub txiaj ntsig alpha-aminoalkyl tshaj dhau yog qhov txaus siab los pib dawb radical polymerization. Lub hydroxyl radicals yog qhov ruaj khov thiab tsis pib ua polymerization, tab sis muaj ntau dua los ntawm kev yws rov qab lossis hydrogen tawm cov kev tsis haum.
Txawm hais tias kev hloov dua siab tshiab tiav tshwm sim, Hom II tus kws yees duab yuav khaws cov nyhav me me uas lwg me me uas yuav mus nyob rau.
Txawm li cas los xij, qhov tseeb UV kho cov tshuaj tiv thaiv hauv LED EV cov cuab yeej tseem txawv heev ntawm lub xeev zoo tagnrho, uas yog, lwm qhov kev cuam tshuam yuav tsum tau muab coj los txiav txim. Hauv lwm lo lus, cov ntaub ntawv siv tau yog tias yuav tsum muaj qee qhov seem ntawm cov seem ntawm tus neeg soj ntsuam tsis thaij duab. Hauv hom I photoinitiators, yog vim muaj kev rov ua kom ncaj qha lossis txeem ntawm cov neeg hauv hom kab nyob hauv hom II photoinitiators, lwm qhov tshwm sim rau hom I photoinitiators yuav rov ua kom muaj cov tshuaj dawb. Los yog cov tshuaj tiv thaiv hydrogen tawm.
Txhawm rau kom txo qhov tsiv teb tsaws, nws yog qhov yuav tsum tau kho tus kws yees duab thaij duab. Ib txoj kev yog ua kom qhov hnyav ntawm lub cev ntawm tus kws kho hluav taws xob. Nws tau pom tias thaum lub phaus molecular tsawg dua 300, qhov sib txawv ntawm qhov sib txawv yog nce, thiab thaum cov phaus molecular hnyav tshaj 1000, qhov kev tsiv teb tsaws pom tias yog me me. Yog li, raws li cov kev cai muaj feem ntawm European Khoom Noj Khoom Haus Kev Nyab Xeeb Kev Nyab Xeeb, tsuas yog cov paub lub cev nyhav tsis paub yuav suav tau tias yog tshuaj lom. Rau hom I photoinitiators, ib qho tuaj yeem muaj ntau hom oligomeric photoinitiators nrog ntau dua ib qho kev ua kom tau qhov kev coj tus kheej tau hais los saud, zoo heev ua rau lawv muaj peev xwm koom nrog qhov tshuaj tiv thaiv. Qhov kev cuam tshuam tsis zoo ntawm oligomerized photoinitiators, txawm li cas los xij, yog tias viscosity yog siab dua thiab viscosity ntawm cov qauv kawg tau siab dua, nrog cov txiaj ntsig tias qhov kho qhov rais ntawm cov qauv tsim kom tsawg. Yog tias tus monomer raug siv los txo qis viscosity, nws yuav qhia qhov tshiab rau kev tsiv teb tsaws vim qhov ua haujlwm qis ntawm qis viscosity monomer siv.
Rau hom II photoinitiators, ib txoj hauv kev los txo qhov tsis zoo cuam tshuam rau viscosity thaum tib lub sij hawm txo qhov ntxim nyiam ntawm kev tsiv teb tsaws yog kom qis lub cev nyhav thiab qhia cov photoinitiator ncaj qha rau hauv cov khoom siv system. Qhov no tuaj yeem ua tiav los ntawm kev qhia txog kev ua ib pawg acrylate ua haujlwm rau hauv cov txheej txheem molecular ntawm tus kws yees duab tau qhia hauv daim duab 6, siv tus piv txwv ntawm no yog HBEOAc.
Gravure UV khoom Vev tswv yim: Cov xwm txheej ntxiv, yog tias cov tshuaj ntxiv nws tus kheej tsis-nti, muaj kev pheej hmoo rau kev tsiv teb tsaws. Qhov zoo, feem ntau ntawm cov tshuab ntxiv ntxiv tam sim no muaj cov tshuaj ntxiv los tiv thaiv zoo kom tsis txhob muaj qhov txawv txav ntxiv ntawm kev ntxiv tsiaj txhu.
Ntxiv rau qhov kev tsim qauv nws tus kheej, lwm yam, nrog rau kev kho kom zoo, ib puag ncig cov khoom siv, yuav ua teeb meem rau zaub mov kev nyab xeeb. Yog li, nws yuav tsum tau them sai sai rau qhov teeb meem no hauv txhua qhov txuas hauv txhua tus nqi saw, txhawm rau kom zam kev nyab xeeb rau zaub mov kev nyab xeeb los ntawm cov khoom tsiv teb tsaws rau hauv cov zaub mov ntim.