UV curing yog ultraviolet curing, UV yog lub ntsiab lus ntawm ultraviolet UV rays ultraviolet, kho yog hais txog cov txheej txheem ntawm kev hloov cov tshuaj los ntawm cov molecules tsawg rau polymers.UV curing feem ntau yog hais txog kev kho mob lossis cov kev xav tau ntawm cov txheej txheem (xim), inks, adhesives (glues) los yog lwm yam potting sealants uas yuav tsum tau kho nrog ultraviolet lub teeb, uas txawv ntawm cua sov curing, curing ntawm adhesives (curing agents), natural curing, thiab lwm yam.
Nyob rau hauv lub tshav pob ntawm cov tshuaj polymers, UV kuj yog siv raws li lub ntsiab lus ntawm hluav taws xob curing, UV, uas yog, UV ultraviolet curing, yog siv UV ultraviolet lub teeb nruab nrab thiab luv yoj (300-800 nm) nyob rau hauv UV hluav taws xob, kua UV Cov ntaub ntawv hauv photoinitiator txhawb rau hauv cov dawb radicals lossis cations, yog li ua rau cov khoom siv polymer (resin) uas muaj cov pab pawg ua haujlwm zoo polymerization rau hauv cov txheej txheem uas tsis muaj dej thiab tsis yaj, yog cov cuab yeej tshiab ntawm kev tiv thaiv ib puag ncig thiab qis VOC emissions tawm hauv 60s. ntawm lub xyoo pua 20th.Tom qab 80s ntawm lub xyoo pua 20th, Tuam Tshoj tau tsim kho sai heev.
Cov oligomers muaj cov viscosity siab, thiab txhawm rau txhim kho kev tsim kho thiab txhim kho kev kho ceev ntawm crosslinking, nws yog ib qho tsim nyog yuav tau ntxiv monomers li reactive diluents los kho cov rheology ntawm cov resin.Cov qauv ntawm cov reactive diluent muaj ib qho tseem ceeb ntawm cov khoom ntawm cov txheej txheem kawg xws li flowability, plam, wettability, o, shrinkage, adhesion thiab tsiv teb tsaws nyob rau hauv lub txheej zaj duab xis.Reactive diluents tuaj yeem yog monofunctional lossis multifunctional, tom kawg yog qhov zoo dua vim nws txhim kho crosslinking ntawm kev kho.Cov kev ua tau zoo ntawm cov reactive diluent yog, dilution muaj peev xwm, solubility, tsw, muaj peev xwm txo qhov viscosity ntawm nruab nrab, volatility, functionality, nto nro, shrinkage thaum lub sij hawm polymerization, iav hloov kub (Tg) ntawm homopolymer, cuam tshuam rau tag nrho. kho ceev thiab toxicity.Cov monomer siv yuav tsum yog ib qho monomer uas khaus tawv nqaij thiab nws tus nqi tsis tshaj 3 raws li kev txiav txim los ntawm Draize.Ib tug raug monomer siv raws li reactive diluent yog tripropylene glycol diacrylate (TPGDA).
Fast polymerization thim rov qab daim ntaub ntawv nyob rau hauv cov tshuaj mechanism ntawm UV curing yog ua tiav los ntawm kev tsim cov dawb radical tshua nyob rau hauv haum photoinitiators thiab / los yog photosensitizers thiab high-kev ua tau zoo teeb pom kev zoo tej yam kev mob.Photoinitiators uas tsim cov dawb radicals thiab cationic intermediates tuaj yeem siv.Txawm li cas los xij, hauv kev lag luam niaj hnub no, cov qub qub feem ntau yog xim (uas yog, photoinitiator uas tuaj yeem tsim cov dawb radicals).
Tam sim no, feem ntau siv ultraviolet wavelengths yog 365nm, 253.7nm, 185nm, thiab lwm yam nta xws li ziab tam sim ntawd, tsis tshua muaj nqi khiav lag luam, txhim kho zoo, txo qhov chaw cia, huv si thiab siv tau zoo.Lub teeb lub zog siv feem ntau yog ntau tshaj 1000W, siv ultraviolet UVA UVC, thiab lwm yam, uas UVC siv ntau lub teeb amalgam.
Post lub sij hawm: Oct-19-2022