Lub hauv paus ua haujlwm thiab kev txhawb nqa ntawm UV txheej

Cov haujlwm sib txawv ntawm UV txheej hauv cov txheej txheej niaj hnub no yog los ntawm lawv cov kev tsim kho kev tshawb fawb nyob rau hauv cov txheej txheem photocuring thiab kev sib koom ua ke ntawm ntau yam khoom. Lawv cov kev ua haujlwm tsis yog txiav txim siab los ntawm ib tus cwj pwm, tab sis yog los ntawm kev sib xyaw ua ke ntawm cov yeeb yaj kiab hauv cov yeeb yaj kiab - kev tsim cov txheej txheem, kho cov txheej txheem, thiab cov khoom siv pabcuam, tsim cov txheej txheem dav dav uas suav nrog cov khoom siv kho tshuab, kav ntev, kev hloov pauv ib puag ncig, thiab kev nthuav qhia zoo nkauj.

Cov tshuaj tiv thaiv photocuring yog lub hauv paus tseem ceeb rau kev ua haujlwm ntawm UV txheej. Nyob rau hauv ultraviolet lub teeb irradiation, photoinitiators nqus cov wavelengths ntawm lub zog thiab decompose los tsim dawb radicals los yog cations, sai pib saw polymerization ntawm resins uas muaj unsaturated ob daim ntawv cog lus thiab reactive diluents, ua kom tiav cov transformation ntawm cov kua rau cov khoom nyob rau hauv vib nas this. Qhov kev sib txuas tam sim no ua rau siab - qhov ceev peb- qhov sib txuas network, nteg lub hauv paus rau txheej txheej siab hardness, muaj zog adhesion, thiab ceev ceev, ua UV coatings superior rau ib txwm chav tsev- kub los yog cua sov- kho tshuab nyob rau hauv cov nqe lus ntawm efficiency thiab molding zoo.

Cov qauv tshuaj ntawm cov yeeb yaj kiab- tsim cov tshuaj yog qhov tseem ceeb rau nws txoj kev ua haujlwm ntau yam. Acrylic oligomers nthuav tawm cov khoom sib txawv raws li lawv cov qauv pob txha: epoxy acrylates muab siab hardness thiab tshuaj tiv thaiv, polyurethane acrylates txhim khu kev yooj yim thiab puas ua hauj lwm, thaum polyester acrylates zoo nyob rau hauv gloss thiab nto leveling. Los ntawm kev sib xyaw ntau hom oligomers, lub zog txhua yam, huab cua tsis kam, thiab kev xav ntawm cov txheej tuaj yeem raug tswj kom ua tau raws li ntau yam kev xav tau ntawm rooj tog, hluav taws xob, thiab cov khoom siv hauv tsev.

Reactive diluents ua si ob qho tib si khiav - tswj thiab kev ua haujlwm hauv cov tshuab ua haujlwm. Multifunctional monomers tuaj yeem nce crosslinking ceev, txhim kho qhov khawb thiab hnyav tsis kam ntawm zaj duab xis; monofunctional monomers muaj txiaj ntsig zoo rau kev txhim kho qhov yooj yim thiab du nto, tiv thaiv zaj duab xis brittleness. Kev xaiv thiab qhov sib piv ntawm photoinitiators txiav txim siab qhov tob tob thiab tus nqi, thiab tseem cuam tshuam rau kev ua haujlwm ruaj khov nyob rau hauv cov xim lossis tuab txheej.

Cov txheej txheem ntxiv ntxiv txhim kho lub hauv paus ua haujlwm: cov neeg ua haujlwm qib tshem tawm cov txheej txheem tsis xws luag, cov defoamers inhibits npuas tsim, thiab lub teeb stabilizers thiab antioxidants ncua kev daj thiab kev laus, ua rau cov xim pleev xim kom muaj sijhawm ntev - kev ua haujlwm nyob rau hauv ib puag ncig nyuaj.

Nws yog pov thawj tias lub hauv paus ua haujlwm ntawm UV txheej yog tsim los ntawm kev sib koom ua ke ntawm cov duab- pib ua cov polymerization sai, cov qauv tsim tau zoo, ua tiav cov haujlwm monomer, thiab kev tswj xyuas meej ntawm cov khoom ntxiv. Qhov kev tsim qauv zoo no muab kev txhawb nqa txhim khu kev qha rau kev ua tiav kev ua haujlwm siab thiab ntau lub zog hauv ntau qhov kev thov.