xov xwm

Ultraviolet absorber (UV absorber) yog ib yam khoom siv los tswj lub teeb uas nqus tau cov teeb ultraviolet ntawm lub hnub thiab cov teeb fluorescent yam tsis hloov nws tus kheej. Ultraviolet absorber feem ntau yog cov hmoov dawb crystalline, zoo thermal stability, zoo chemical stability, tsis muaj xim, tsis muaj tshuaj lom, tsis muaj ntxhiab, feem ntau siv rau hauv polymers (plastics, thiab lwm yam), coatings thiab lwm yam.

Feem ntau cov xim, tshwj xeeb tshaj yog cov xim tsis muaj zog, tuaj yeem ua si qee qib ntawm kev ruaj khov lub teeb thaum siv ib leeg hauv cov khoom yas. Rau cov khoom yas xim rau kev siv sab nraum zoov ntev, kev ruaj khov lub teeb ntawm cov khoom tsis tuaj yeem txhim kho los ntawm cov xim ib leeg. Tsuas yog siv cov khoom ruaj khov teeb pom kev zoo tuaj yeem tiv thaiv lossis qeeb qeeb qhov kev laus ntawm cov khoom yas xim rau lub sijhawm ntev. Txhim kho qhov ruaj khov lub teeb ntawm cov khoom yas xim. Hindered amine teeb stabilizer (HALS) yog ib chav kawm ntawm cov organic amine sib xyaw nrog steric hindrance effect. Vim nws cov haujlwm ntawm kev rhuav tshem hydroperoxide, quenching radical oxygen, ntes cov dawb radicals, thiab rov ua dua ntawm cov pab pawg zoo, HALS yog cov yas teeb stabilizer nrog kev ua haujlwm tiv thaiv kev laus duab siab thiab ntau tshaj plaws hauv tsev thiab txawv teb chaws. Cov ntaub ntawv qhia tau hais tias lub teeb stabilizer tsim nyog lossis kev sib xyaw ua ke ntawm cov antioxidant thiab lub teeb stabilizer tsim nyog tuaj yeem txhim kho lub teeb thiab oxygen ruaj khov ntawm cov khoom yas xim sab nraum zoov ntau zaus. Rau cov khoom yas uas muaj xim los ntawm cov xim photoactive thiab cov xim photosensitive (xws li cadmium daj, uncored rutile, thiab lwm yam), xav txog qhov cuam tshuam ntawm catalytic photoaging ntawm cov xim, qhov ntau ntawm cov stabilizer teeb yuav tsum tau nce ntxiv raws li.

Cov khoom nqus Uv feem ntau tuaj yeem muab faib ua pawg raws li cov qauv tshuaj lom neeg, feem ua haujlwm thiab kev siv, uas tau piav qhia hauv qab no:

1. Kev faib tawm raws li cov qauv tshuaj lom neeg: cov khoom nqus ultraviolet tuaj yeem muab faib ua cov khoom nqus ultraviolet organic thiab cov khoom nqus ultraviolet inorganic. Cov khoom nqus ultraviolet organic feem ntau suav nrog benzoates, benzotriazole, cyanoacrylate, thiab lwm yam, thaum cov khoom nqus ultraviolet inorganic feem ntau suav nrog zinc oxide, hlau oxide, titanium dioxide thiab lwm yam.

2. Kev faib tawm raws li hom kev ua haujlwm: cov khoom nqus ultraviolet tuaj yeem muab faib ua hom tiv thaiv thiab hom nqus. Cov khoom nqus UV uas tiv thaiv tuaj yeem cuam tshuam lub teeb UV thiab yog li tiv thaiv nws kom tsis txhob nkag mus rau hauv lub cev, thaum nqus cov khoom nqus UV tuaj yeem nqus lub teeb UV thiab hloov nws mus ua cua sov lossis lub teeb pom kev.

3. Kev faib tawm raws li kev siv: cov khoom nqus ultraviolet tuaj yeem muab faib ua qib zoo nkauj, qib zaub mov, qib tshuaj, thiab lwm yam. Cov khoom nqus UV qib zoo nkauj feem ntau yog siv rau hauv tshuaj pleev thaiv hnub, cov khoom tu tawv nqaij thiab lwm yam tshuaj pleev thaiv hnub, cov khoom nqus UV qib zaub mov feem ntau yog siv rau hauv cov ntaub ntawv ntim khoom noj, thiab cov khoom nqus UV qib tshuaj feem ntau yog siv rau hauv cov tshuaj.

Unilong Kev Lag Luam yog ib tus kws tshaj lijChaw tsim khoom UV, peb tuaj yeem muab cov hauv qab noUV-seriesntawm cov khoom, yog tias koj xav tau, thov koj xav tiv tauj peb