Fluorescent whitening agent ndi mtundu wa organic pawiri womwe ukhoza kusintha kuyera kwa nsalu za ulusi ndi mapepala, omwe amadziwikanso kuti optical whitening agent ndi fluorescent whitening agent.Nsalu, ndi zina zotero nthawi zambiri zimakhala zachikasu chifukwa cha kuphatikizika kwa zonyansa zamitundu, ndipo bleaching yamankhwala idagwiritsidwa ntchito kuzichotsa m'mbuyomu.Njira yowonjezerera chopangira choyera kuzinthuzo tsopano yatengedwa, ndipo ntchito yake ndikutembenuza ma radiation osawoneka a ultraviolet omwe amatengedwa ndi mankhwalawa kukhala ma radiation a buluu-violet fluorescent, omwe amaphatikizana ndi kuwala kwachikasu koyambirira ndikukhala kuwala koyera, komwe kumapangitsa kuti mankhwalawa azitha kupirira kuwala kwa dzuwa.wa kuyera.Zowunikira zakhala zikugwiritsidwa ntchito kwambiri mu nsalu, mapepala, ufa wochapira, sopo, labala, mapulasitiki, utoto ndi utoto.
Brighteners onse ali ndi ma cyclic conjugated system pamapangidwe amankhwala, monga: zotumphukira za stilbene, zotumphukira za phenylpyrazoline, zotumphukira za benzothiazole, zotumphukira za benzimidazole, zotumphukira za coumarin ndi zotumphukira za Naphthalimide, ndi zina zambiri.Gwiritsani ntchito njira ndi katundu kugawa zowunikira zitha kugawidwa m'mitundu inayi:
Mndandanda umatchula zinthu zoyera za fluorescent zomwe zimatha kupanga ma cations mu njira yamadzi.Oyenera whitening wa acrylic ulusi.B series optical lighteners ndi oyenera kuwunikira ulusi wa cellulose.C mndandanda amatanthauza mtundu wa fulorosenti whitening wothandizira omwazika mu osamba utoto pamaso dispersant, oyenera whitening poliyesitala ndi ulusi wina hydrophobic.D mndandanda amatanthauza fulorosenti whitening wothandizira oyenera mapuloteni CHIKWANGWANI ndi nayiloni.Malinga ndi kapangidwe ka mankhwala, zoyera zoyera zitha kugawidwa m'magulu asanu: ① mtundu wa stilbene, womwe umagwiritsidwa ntchito mu ulusi wa thonje ndi ulusi wina wopangidwa, kupanga mapepala, kupanga sopo ndi mafakitale ena, okhala ndi fluorescence ya buluu;② mtundu wa coumarin, wokhala ndi kununkhira Mapangidwe a nyemba ketone, omwe amagwiritsidwa ntchito mu mapulasitiki a polyvinyl chloride, etc., ali ndi fluorescence yolimba ya buluu;③ mtundu wa pyrazoline, womwe umagwiritsidwa ntchito ngati ubweya, polyamide, ulusi wa akiliriki ndi ulusi wina, wokhala ndi fluorescence wobiriwira;④ mtundu wa benzoxazine, wokhala ndi ulusi wa acrylic ndi mapulasitiki ena monga polyvinyl kolorayidi ndi polystyrene, ali ndi fluorescence yofiira;Mtundu wa ⑤phthalimide, wa poliyesitala, acrylic, nayiloni ndi ulusi wina, wokhala ndi fulorosenti ya buluu.Pamwambapa ndi gulu la whitening agents.Makasitomala akamasankha zinthu zoyera, amayenera kumvetsetsa kaye zinthu zawo, kuti athe kusankha njira yoyenera yoyeretsera.Ndipo makasitomala ayenera kudziwanso kuti akamagwiritsa ntchito zoyera, zoyera zimangowoneka zowala komanso zofananira, ndipo sizingalowe m'malo mwa bleaching.Chifukwa chake, zinthu zachikuda zimathandizidwa mwachindunji ndi whitening wothandizira popanda kuyeretsa, ndipo kuyera kwake sikungapezeke kwenikweni.Ndipo whitening wothandizira salinso whitening, koma ali ndi machulukitsidwe ndende.Kuposa mtengo wina wokhazikika wokhazikika, osati kokha kuyera, komanso chikasu.
Nthawi yotumiza: Jan-24-2022