Nrog rau kev paub txog kev noj qab haus huv thiab kev tiv thaiv cov khoom siv, UV-cov ntaub ntawv pov thawj tau siv ntau dua hauv kev tsim vaj tsev, tsheb, hluav taws xob, thiab lwm yam. Lawv lub luag haujlwm tseem ceeb yog txhawm rau thaiv lossis txo qhov teeb meem ntawm ultraviolet (UV) rays ntawm cov khoom thiab tib neeg lub cev, thaum tswj qhov siab tshaj plaws ntawm cov teeb pom kev zoo kom tau raws li cov neeg siv khoom xav tau. Cov qauv tsim ntawm UV- cov yeeb yaj kiab pov thawj muaj ntau yam kev qhuab qhia, suav nrog cov khoom siv kho qhov muag, cov tshuaj polymer, thiab cov txheej txheem txheej txheem. Qhov tseem ceeb nyob rau hauv kev ua tiav kev xaiv UV lim los ntawm cov khoom siv sib xyaw ua ke thiab kev ua kom zoo dua qub.
Los ntawm kev pom qhov muag pom, UV rays tuaj yeem muab faib ua UVA (315-400nm), UVB (280-315nm), thiab UVC (100-280nm) raws li lawv cov wavelengths. UVA thiab UVB tuaj yeem nkag mus rau hauv huab cua thiab ua rau muaj kev laus thiab tsis muaj xim rau tib neeg cov tawv nqaij, qhov muag, thiab cov ntaub ntawv saum npoo. Lub hom phiaj tsim ntawm UV-pov thawj zaj duab xis yog nqus los yog cuam tshuam txog UV wavelengths tshwj xeeb los ntawm cov qauv molecular lossis additives, thaum tso cai rau pom lub teeb kom dhau los ntawm qhov tsis muaj kev cuam tshuam.
Tam sim no, tseem ceeb UV- cov yeeb yaj kiab pov thawj siv ob txoj hauv kev tseem ceeb. Ib txoj hauv kev suav nrog cov khoom siv ua haujlwm raws li UV absorbers. Cov ntaub ntawv no tau txhim kho los ntawm kev sib ntxiv ntawm cov organic lossis inorganic tebchaw, xws li zinc oxide, titanium dioxide, lossis tshwj xeeb organic UV absorbers, los ua kom muaj zog nqus hauv UV ntau. Cov absorbers no hloov UV zog rau hauv tshav kub lossis lwm yam tsawg- cov ntaub ntawv hluav taws xob, yog li tiv thaiv UV nkag mus. Lwm txoj hauv kev siv zog siv txoj hauv kev cuam tshuam ntawm multilayer optical films. Los ntawm kev hloov cov ntaub ntawv nrog cov ntsuas ntsuas sib txawv, lawv tsim cov kev xav txog qhov siab tshaj plaws nyob rau hauv qhov tshwj xeeb wavelength ranges, yog li xav txog lossis tawg lub teeb UV.
Tsis tas li ntawd, kev tsim ntawm UV- thaiv cov yeeb yaj kiab yuav tsum sib npaug ntawm lub teeb xa hluav taws xob, huab cua tsis kam, thiab lub zog txhua yam. Piv txwv li, nyob rau hauv lub iav vaj tse los yog lub qhov rais automotive films, zaj duab xis yuav tsum muaj kev ruaj ntseg nyob rau hauv ntev - lub sij hawm raug UV teeb, kub kub, thiab fluctuating av noo kom tsis txhob yellowing los yog kev ua tau zoo degradation. Yog li ntawd, kev ua kom zoo xaiv cov khoom siv thiab zaj duab xis- txheej txheem tsim yog qhov tseem ceeb, suav nrog kev siv cov huab cua zoo heev- cov substrates resistant, txhim kho txheej txheej txheej, thiab kev qhia txog cov txheej txheem nanoscale.
Yav tom ntej, nrog kev nce qib hauv cov ntaub ntawv tshawb fawb, UV- thaiv cov yeeb yaj kiab yuav txhim kho mus rau kev ua tau zoo dua, cov ntaub ntawv nyias nyias, thiab kev ua haujlwm ntau dua kom tau raws li cov kev xav tau ntawm ntau hom kev siv.
