UV curing (UV) txheej yog ib hom tshiab ntawm ib puag ncig tus phooj ywg 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 curing coatings yog tsim los ntawm oligomers, nquag diluents, photoinitiators thiab additives.
1. Oligomer
Cov khoom siv ua yeeb yaj kiab yog cov khoom tseem ceeb ntawm txheej, uas yog cov kua dej ntawm txheej txheej.Kev ua yeeb yaj kiab, kev tsim kho thiab lwm yam tshwj xeeb ntawm cov txheej txheem yog nyob ntawm cov khoom siv ua yeeb yaj kiab.Cov khoom siv ua yeeb yaj kiab ntawm UV txheej yog oligomer, thiab nws qhov kev ua tau zoo yog txiav txim siab qhov kev tsim kho thiab lub teeb kho tus nqi ntawm cov txheej ua ntej kho, cov yeeb yaj kiab ua haujlwm tom qab kho thiab lwm yam khoom tshwj xeeb.
UV txheej yog feem ntau dawb radical lub teeb kho tshuab, yog li cov oligomers siv yog txhua yam ntawm acrylic resins.Cationic UV txheej oligomers yog epoxy resin thiab vinyl ether compounds.
2. Active diluent
Active diluent yog lwm yam tseem ceeb ntawm UV txheej.Nws tuaj yeem dilute thiab txo viscosity, thiab tseem muaj cov cuab yeej kho 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.Hauv cov qauv tiag tiag, mono -, bifunctional thiab multi-functional acrylates yuav siv ua ke los ua kom lawv cov khoom sib ntxiv thiab ua tiav lub hom phiaj ntawm 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 xim UV coatings, 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 reactive amine feem ntau ntxiv rau hauv UV txheej.
4. Cov tshuaj ntxiv
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 cia khoom thiab kev tsim kho ntawm cov txheej txheem, txhim kho cov yeeb yaj kiab kev ua tau zoo thiab muab cov yeeb yaj kiab rau qee qhov 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.
Lub sij hawm xa tuaj: Plaub Hlis-05-2022