Ultraviolet curing (UV) txheej yog ib hom tshiab ntawm kev tiv thaiv ib puag ncig txheej.Nws tus nqi ziab yog ceev heev.Nws tuaj yeem kho tau los ntawm UV teeb nyob rau hauv ob peb vib nas this, thiab cov khoom siv tau zoo heev.
UV curable coatings yog tsim los ntawm oligomers, nquag diluents, photoinitiators thiab additives.
1. oligomer
Zaj duab xis tsim cov khoom yog cov khoom tseem ceeb ntawm txheej, thiab nws yog cov kua dej ntawm txheej.Kev ua yeeb yaj kiab, kev ua haujlwm thiab lwm yam tshwj xeeb ntawm cov txheej txheem feem ntau yog nyob ntawm cov khoom siv ua yeeb yaj kiab.Cov khoom siv ua yeeb yaj kiab ntawm UV txheej yog oligomer.Nws qhov kev ua tau zoo yog txiav txim siab txog daim ntawv thov kev ua tau zoo, lub teeb kho tus nqi, kev ua yeeb yaj kiab thiab lwm yam khoom tshwj xeeb ntawm txheej ua ntej kho.
UV txheej yog feem ntau dawb radical lub teeb kho tshuab, yog li cov oligomers siv yog ntau yam acrylic resins.Cationic UV txheej oligomers yog epoxy resin thiab vinyl ether compounds.
2. nquag diluent
Active diluent yog lwm yam tseem ceeb ntawm UV txheej.Nws tuaj yeem dilute thiab txo viscosity, thiab tuaj yeem kho qhov ua tau zoo ntawm cov yeeb yaj kiab kho.Acrylate functional monomers muaj siab reactivity thiab tsawg volatility, yog li lawv tau dav siv nyob rau hauv UV txheej.Acrylic esters feem ntau yog siv los ua active diluents rau UV txheej.Nyob rau hauv qhov tseeb formulation, mono -, Bi -, thiab multi-functional acrylates yuav siv ua ke los ua kom lawv cov khoom ntxiv thiab ua tiav cov txiaj ntsig zoo.
3. photoinitiator
Photoinitiator yog ib qho tshwj xeeb catalyst hauv UV txheej.Nws yog ib qho tseem ceeb ntawm UV txheej thiab txiav txim siab txog UV kho tus nqi ntawm UV txheej.
Rau cov xim tsis muaj kua roj vanish UV txheej, 1173, 184, 651 thiab bp / tertiary amine feem ntau yog siv los ua photoinitiators.184 nrog kev ua haujlwm siab, tsis muaj ntxhiab tsw thiab yellowing kuj, nws yog qhov nyiam photoinitiator rau yellowing resistant UV txheej.Txhawm rau txhim kho lub teeb pom kev zoo, nws feem ntau siv ua ke nrog TPO.
Rau cov uas tsis yog-ferrous UV txheej, photoinitiators yuav tsum yog itx, 907, 369, TPO, 819, thiab lwm yam. Qee zaum, txhawm rau txo cov pa oxygen polymerization inhibition thiab txhim kho UV curing tus nqi, me me ntawm active amine feem ntau ntxiv rau hauv UV. txheej txheej.
4. additives
Cov additives yog cov khoom pab cuam ntawm UV txheej.Lub luag haujlwm ntawm cov khoom siv ntxiv yog txhawm rau txhim kho kev ua haujlwm, kev ua haujlwm khaws cia thiab kev ua haujlwm ntawm cov txheej txheem, txhim kho cov yeeb yaj kiab kev ua tau zoo thiab tso cai rau cov yeeb yaj kiab nrog qee qhov haujlwm tshwj xeeb.Feem ntau siv additives rau UV txheej muaj xws li defoamer, leveling agent, wetting dispersant, adhesion promoter, matting agent, polymerization inhibitor, thiab lwm yam, uas plays lub luag hauj lwm sib txawv hauv UV txheej.
Post lub sij hawm: Aug-02-2022