{"id":3014,"date":"2020-08-24T07:41:55","date_gmt":"2020-08-24T07:41:55","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=3014"},"modified":"2026-04-28T11:19:22","modified_gmt":"2026-04-28T11:19:22","slug":"why-the-fluorescent-whitening-agent-looks-yellow-and-the-solution","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/why-the-fluorescent-whitening-agent-looks-yellow-and-the-solution\/","title":{"rendered":"Mi\u00e9rt t\u0171nik s\u00e1rg\u00e1nak a fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer \u00e9s a megold\u00e1s"},"content":{"rendered":"\n

Quick answer:<\/strong> For fluorescent-whitening and food-contact discussions, buyers usually focus on specification fit, migration risk, regulatory boundaries, and how the additive behaves in the finished plastic system rather than treating it as a simple color question.<\/p>\n\n\n\n

A termel\u00e9s feh\u00e9rs\u00e9g\u00e9nek jav\u00edt\u00e1sa \u00e9rdek\u00e9ben n\u00f6velni akarjuk a feh\u00e9r\u00edt\u0151szer mennyis\u00e9g\u00e9t a c\u00e9l el\u00e9r\u00e9se \u00e9rdek\u00e9ben, de az eredm\u00e9ny nem feh\u00e9r, hanem s\u00e1rgul\u00f3 sz\u00f6vet, az adatok ellen\u0151rz\u00e9se \u00e9s az okok elemz\u00e9se r\u00e9v\u00e9n, sok k\u00eds\u00e9rlet ut\u00e1n megtal\u00e1ltuk a s\u00e1rgul\u00e1si pontot \u00e9s a megold\u00e1st.<\/h4>\n\n\n\n\n

1\u3001 A fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151 szer elve<\/strong><\/h2>\n\n\n\n

Vannak fajt\u00e1k a fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer, feh\u00e9r\u00edt\u00e9se k\u00fcl\u00f6nb\u00f6z\u0151 sz\u00e1lak sz\u00fcks\u00e9g k\u00fcl\u00f6nb\u00f6z\u0151 m\u00e1rk\u00e1j\u00fa feh\u00e9r\u00edt\u0151szer, b\u00e1r a k\u00e9miai szerkezete \u00e9s tulajdons\u00e1gai a k\u00fcl\u00f6nb\u00f6z\u0151 feh\u00e9r\u00edt\u0151szer elt\u00e9r\u0151, de a feh\u00e9r\u00edt\u00e9s elve sz\u00e1l vagy sz\u00f6vet ugyanaz. A feh\u00e9r\u00edt\u00e9s elve els\u0151sorban a feh\u00e9r\u00edt\u0151 molekul\u00e1knak k\u00f6sz\u00f6nhet\u0151, amelyek \u00f6sszesen konjug\u00e1lt kett\u0151s k\u00f6t\u00e9srendszert, j\u00f3 laposs\u00e1got tartalmaznak, a speci\u00e1lis molekulaszerkezet a napf\u00e9ny alatt elnyeli a napf\u00e9nyt, az ultraibolya f\u00e9nyt (300 ~ 400 nm hull\u00e1mhossz\u00fas\u00e1g\u00fa) \u00e9s az ibolya f\u00e9nyt (420 ~ 500 nm hull\u00e1mhossz\u00fas\u00e1g\u00fa), vagy az ibolya f\u00e9nyt \u00e9s a sz\u00e1lakat a s\u00e1rga f\u00e9nnyel keverve a sz\u00f6veten feh\u00e9r f\u00e9nybe keveredik,\u00edgy a sz\u00e1l vagy a sz\u00f6vet \u00e9szrevehet\u0151en feh\u00e9r lesz.<\/h4>\n\n\n\n

2 \u3001 A feh\u00e9rs\u00e9g cs\u00f6kken\u00e9s\u00e9nek oka<\/strong><\/h2>\n\n\n\n

(1) Mivel a s\u00e1rga f\u00e9ny intenzit\u00e1sa a sz\u00f6veten korl\u00e1tozott, az ultraibolya f\u00e9nyt elnyel\u0151 fluoreszcens feh\u00e9r\u00edt\u0151szer \u00e1ltal kibocs\u00e1tott kieg\u00e9sz\u00edt\u0151 sz\u00edn\u0171 f\u00e9ny - k\u00e9k \u00e9s lila f\u00e9ny - szint\u00e9n korl\u00e1tozott, hogy ellens\u00falyozza a s\u00e1rga f\u00e9nyt (a f\u0151 hull\u00e1mhossz k\u00f6r\u00fclbel\u00fcl 570 nm).<\/h4>\n\n\n\n

(2) A fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151 hat\u00e1sa csak optikai feh\u00e9r\u00edt\u00e9s \u00e9s kieg\u00e9sz\u00edt\u00e9s, \u00e9s nem helyettes\u00edtheti a k\u00e9miai feh\u00e9r\u00edt\u00e9st. Ez\u00e9rt a fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151 hat\u00e1sa nem ide\u00e1lis a feh\u00e9r\u00edt\u00e9s n\u00e9lk\u00fcli sz\u00f6vethez.<\/h4>\n\n\n\n

(3) A fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer elve szerint a feh\u00e9r\u00edt\u0151szer feh\u00e9r\u00edt\u0151 hat\u00e1sa els\u0151sorban a napf\u00e9ny UV-tartalm\u00e1t\u00f3l \u00e9s a fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer koncentr\u00e1ci\u00f3j\u00e1t\u00f3l f\u00fcgg a sz\u00e1lakon vagy a sz\u00f6veten.Ha az UV-tartalom elegend\u0151, a fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer koncentr\u00e1ci\u00f3ja a sz\u00f6veten egy bizonyos tartom\u00e1nyon bel\u00fcl v\u00e1ltozik, \u00e9s a feh\u00e9r\u00edt\u0151szer koncentr\u00e1ci\u00f3j\u00e1nak n\u00f6veked\u00e9s\u00e9vel a feh\u00e9r\u00edt\u0151szer feh\u00e9r\u00edt\u0151 hat\u00e1sa n\u0151 a sz\u00f6veten, \u00e9s a k\u00e9k iboly\u00e1nt\u00fali f\u00e9ny intenzit\u00e1sa is n\u0151, hogy ellens\u00falyozza a s\u00e1rga f\u00e9nyt a sz\u00f6veten, \u00e9s a sz\u00f6vet egyre feh\u00e9rebb\u00e9 v\u00e1lik.Amikor a feh\u00e9r\u00edt\u0151szer koncentr\u00e1ci\u00f3ja egy bizonyos megfelel\u0151 koncentr\u00e1ci\u00f3ra n\u0151, az \u00e1ltala kibocs\u00e1tott k\u00e9k iboly\u00e1nt\u00fali f\u00e9ny intenzit\u00e1sa pontosan megegyezik a sz\u00f6veten l\u00e9v\u0151 s\u00e1rga f\u00e9ny intenzit\u00e1s\u00e1val, amelyek pontosan kioltj\u00e1k egym\u00e1st, \u00e9s a feh\u00e9r\u00edt\u0151 hat\u00e1s a legjobb, \u00e9s a feh\u00e9rs\u00e9g \u00e9rt\u00e9ke a legmagasabb.De ha n\u00f6veli a d\u00f3zis feh\u00e9r szer, mint az optim\u00e1lis koncentr\u00e1ci\u00f3, a sz\u00f6vet az abszorpci\u00f3s ibolya f\u00e9ny intenzit\u00e1sa fok t\u00f6bb, mint kompenz\u00e1lja a sz\u00f6vet az erej\u00e9t a s\u00e1rga f\u00e9ny, egy nyilv\u00e1nval\u00f3 feh\u00e9r\u00edt\u0151 szer k\u00e9k ibolya f\u00e9ny t\u00fckr\u00f6z\u0151dik, ugyanakkor miatt a felvetett mindenf\u00e9le feh\u00e9r szer csoport k\u00fcl\u00f6nb\u00f6z\u0151 csoportokba, k\u00fcl\u00f6nb\u00f6z\u0151 \u00e1rnyalatok a renderelt (mint p\u00e9ld\u00e1ul a z\u00f6ld f\u00e9ny lila, piros, k\u00e9k, stb.) vil\u00e1gosan l\u00e1that\u00f3, az eredm\u00e9ny a kombin\u00e1lt fell\u00e9p\u00e9s a fenti t\u00e9nyez\u0151k, a n\u00f6veked\u00e9s a sz\u00fcrke sz\u00f6vet, a feh\u00e9rs\u00e9g k\u00e9s\u0151bb cs\u00f6kken.<\/h4>\n\n\n\n

(4) Ha van sav vagy kl\u00f3rg\u00e1z a feh\u00e9r\u00edtett sz\u00f6vet t\u00e1rol\u00e1si helyein , a nedvess\u00e9gtartalom magas, k\u00f6nnyen felsz\u00edvja a vizet, mivel a v\u00edz foly\u00e9kony, a hidrofil csoportok molekul\u00e1ris vonz\u00e1sa alatt ,Megvan a tendencia, hogy a nedvess\u00e9g visszanyer\u00e9se a sz\u00f6vetbor\u00edt\u00e1s hajlamos az egyens\u00falyra, ez az oka annak, hogy a sz\u00f6vet s\u00e1rgul\u00e1sa \u00e9s darabokra b\u0151v\u00fcl, a sz\u00f6vet helyenk\u00e9nt pont \u00e9s v\u00e9rz\u00e9s a sz\u00f6vetek fels\u0151 \u00e9s als\u00f3 r\u00e9tegeiben.<\/h4>\n\n\n\n

(5) A tiszt\u00e1talan v\u00edzmin\u0151s\u00e9g, a v\u00edz nagy kem\u00e9nys\u00e9ge vagy a neh\u00e9z f\u00e9mek befoly\u00e1solhatj\u00e1k a feh\u00e9r\u00edt\u0151 hat\u00e1st.<\/h4>\n\n\n\n

3\u3001 A feh\u00e9r\u00edt\u0151szer s\u00e1rga foltjai<\/strong><\/h2>\n\n\n\n

A feh\u00e9r\u00edt\u0151szer optim\u00e1lis koncentr\u00e1ci\u00f3j\u00e1t a feh\u00e9r\u00edt\u0151szer s\u00e1rgul\u00e1si pontj\u00e1nak nevezik.A k\u00fcl\u00f6nb\u00f6z\u0151 fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szerek s\u00e1rgul\u00e1si pontjai k\u00fcl\u00f6nb\u00f6z\u0151ek.P\u00e9ld\u00e1ul a DT fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer (poli\u00e9szterhez haszn\u00e1lt) s\u00e1rgul\u00e1si pontja 0,8%, azaz amikor a DT feh\u00e9r\u00edt\u0151szer mennyis\u00e9ge meghaladja a 0,8% \u00e9rt\u00e9ket.8%, a feh\u00e9rs\u00e9g \u00e9rt\u00e9ke a mennyis\u00e9g n\u00f6vel\u00e9s\u00e9vel cs\u00f6kken.A VBL fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer s\u00e1rgul\u00e1si pontja (tiszta pamutsz\u00f6vethez haszn\u00e1lj\u00e1k) 0,5 %.A DCB fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer s\u00e1rgul\u00e1si pontja (akrilsz\u00e1l feh\u00e9r\u00edt\u00e9s\u00e9re haszn\u00e1lj\u00e1k) 0,8%.A CH fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer s\u00e1rgul\u00e1si pontja (akrilsz\u00e1las fonalhoz haszn\u00e1lj\u00e1k) 3,3 %. A BlankophorBBU (foly\u00e9kony, Bayer term\u00e9kek, tiszta pamutsz\u00f6vetekhez) s\u00e1rgul\u00e1si pontja 1,26% volt; az Uvite ERN - P (a CGY c\u00e9g term\u00e9ke, poli\u00e9sztersz\u00f6vetben haszn\u00e1lj\u00e1k) s\u00e1rgul\u00e1si pontja 0,8%; az Uvite EBF 250 %C cellul\u00f3z MCGY term\u00e9kek, poli\u00e9sztersz\u00f6vetben haszn\u00e1lj\u00e1k) s\u00e1rgul\u00e1si pontja 3 %.<\/h4>\n\n\n\n

4\u3001 Megold\u00e1sok<\/strong><\/h2>\n\n\n\n

(1) A gy\u00e1rt\u00e1si folyamatban egy sor megfelel\u0151 int\u00e9zked\u00e9st kell tenni, p\u00e9ld\u00e1ul a forral\u00e1si \u00e9s feh\u00e9r\u00edt\u00e9si folyamatban a p\u00e1col\u00e1s ut\u00e1ni mos\u00e1snak elegend\u0151nek kell lennie; szappanoz\u00e1s a szappanmaradv\u00e1nyok minimaliz\u00e1l\u00e1sa \u00e9rdek\u00e9ben; a feh\u00e9r\u00edt\u00e9shez l\u00e1gy vizet kell haszn\u00e1lni, \u00e9s a pH-\u00e9rt\u00e9knek l\u00fagosnak kell lennie (pH8 ~ 9).A fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szerhez j\u00f3 sav\u00e1ll\u00f3s\u00e1g\u00fa term\u00e9keket kell v\u00e1lasztani, mint p\u00e9ld\u00e1ul Uvitex RT, CF, BT (ciba -jiagi c\u00e9g);Tinopal2B, SP (ciba -jiaggi), Leucophor B (sandex); BlankophorBBU (Bayer, inc.), \u00e9s \u00edgy tov\u00e1bb.<\/h4>\n\n\n\n

(2) A hagyom\u00e1nyos elj\u00e1r\u00e1s: s\u00farol\u00e1s \u00e9s feh\u00e9r\u00edt\u00e9s - forr\u00f3 vizes mos\u00e1s - sav - dezoxid\u00e1l\u00e1s - vizes mos\u00e1s.Jeges ecetsavval mosott forr\u00f3 v\u00edz ut\u00e1n.A jegeces ecetsav ill\u00e9kony sav, rossz \u00e1tereszt\u0151k\u00e9pess\u00e9g\u0171, csak a sz\u00e1lak fel\u00fclet\u00e9n l\u00e9v\u0151 n\u00e1tronl\u00fagot semleges\u00edti, nehezen hatol be a sz\u00e1l belsej\u00e9be.K\u00fcl\u00f6n\u00f6sen vastag sz\u00f6vetek, gyakran hagyja marad\u00e9k marad\u00e9k n\u00e1tronl\u00fagot a bels\u0151 sz\u00e1l .Ez\u00e9rt semleges\u00edt\u0151 sav nem csak semleges\u00edti a n\u00e1tronl\u00fagot a sz\u00e1l fel\u00fclet\u00e9n, hanem semleges\u00edti a n\u00e1tronl\u00fagot a sz\u00e1l belsej\u00e9ben, \u00edgy a teljes semleges\u00edt\u00e9s hat\u00e1sa \u00e9rhet\u0151 el. Ek\u00f6zben a t\u00falsavasod\u00e1s idej\u00e9t \u00e9s h\u0151m\u00e9rs\u00e9klet\u00e9t szigor\u00faan ellen\u0151rizni kell a teljes semleges\u00edt\u00e9s \u00e9rdek\u00e9ben. Ez\u00e9rt a t\u00falsavasod\u00e1s idej\u00e9t 15 percr\u0151l 30 percre kell v\u00e1ltoztatni. ez k\u00fcl\u00f6n\u00f6sen fontos a 190 g\/m2 vagy nagyobb t\u00f6meg\u0171, neh\u00e9z sz\u00f6vetek feh\u00e9r\u00edt\u00e9se eset\u00e9n.<\/h4>\n\n\n\n

(3) A kationos l\u00e1gy\u00edt\u00f3szer, a gyenge kationos l\u00e1gy\u00edt\u00f3szer \u00e9s a k\u00f6z\u00f6ns\u00e9ges szilikonolaj k\u00fcl\u00f6nb\u00f6z\u0151 m\u00e9rt\u00e9kben s\u00e1rg\u00edthatja a feh\u00e9r sz\u00f6veteket.Az anionos l\u00e1gy\u00edt\u00f3szer \u00e1ltal\u00e1ban nem okoz s\u00e1rgul\u00e1st, \u00e9s feh\u00e9r sz\u00f6vetek eset\u00e9ben el\u0151ny\u00f6sebb.<\/h4>\n\n\n\n

(4) A sz\u00f6vetnek ker\u00fclnie kell a savakkal vagy g\u00e1zokkal, p\u00e9ld\u00e1ul kl\u00f3rral val\u00f3 \u00e9rintkez\u00e9st.<\/h4>\n\n\n\n

(5) L\u00e1gy vizet kell haszn\u00e1lni.A magas v\u00edzkem\u00e9nys\u00e9g cs\u00f6kkenti a feh\u00e9r\u00edt\u0151 hat\u00e1st. A v\u00edzben l\u00e9v\u0151 sav, szabad kl\u00f3r \u00e9s neh\u00e9zf\u00e9mionok, mint p\u00e9ld\u00e1ul a r\u00e9z \u00e9s a vas, jelent\u0151sen befoly\u00e1solhatj\u00e1k a feh\u00e9r\u00edt\u0151 hat\u00e1st.<\/h4>\n\n\n\n

(6) Ellen\u0151rizze a fluoreszk\u00e1l\u00f3 feh\u00e9r\u00edt\u0151szer adagol\u00e1s\u00e1t.<\/h4>\n\n\n\n

<\/p>\n\n\n\n

Ezt a cikket a Longchang Chemical R&D Department \u00edrta. Ha m\u00e1solni \u00e9s \u00fajranyomtatni szeretn\u00e9, k\u00e9rj\u00fck, adja meg a forr\u00e1st.<\/h4>\n\n\n\n

A k\u00f6vetkez\u0151k a c\u00e9g\u00fcnk \u00e1ltal \u00e9rt\u00e9kes\u00edtett fluoreszcens vil\u00e1gos\u00edt\u00f3 sorozat term\u00e9kei.<\/h4>\n\n\n\n
Optikai f\u00e9nyes\u00edt\u0151 OB-1<\/a><\/td>1533-45-5<\/td><\/tr>
Fluoreszk\u00e1l\u00f3 vil\u00e1gos\u00edt\u00f3 OB<\/a><\/td>7128-64-5<\/td><\/tr>
Fluoreszk\u00e1l\u00f3 vil\u00e1gos\u00edt\u00f3 ER-II<\/a><\/td>13001-38-2<\/td><\/tr>
CBS-X optikai feh\u00e9r\u00edt\u0151<\/a><\/td>27344-41-8<\/td><\/tr>
Optikai f\u00e9nyes\u00edt\u0151 FP-127<\/a><\/td>40470-68-6<\/td><\/tr>
F\u00e9nystabiliz\u00e1tor-944<\/a><\/td>70624-18-9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

How buyers usually evaluate specialty additives in compliance-sensitive plastics<\/h2>\n

Food-contact and compliance-sensitive additive projects usually need a tighter screen than general industrial formulations. The strongest path usually combines specification review, migration thinking, and validation in the real polymer system.<\/p>\n

    \n
  • Start from the regulatory boundary:<\/strong> customer and market requirements often decide the screening route before formulation optimization begins.<\/li>\n
  • Check the polymer and processing route:<\/strong> the same additive can behave differently across resin systems, temperatures, and contact conditions.<\/li>\n
  • Review appearance together with compliance:<\/strong> visual performance still needs to be balanced against safety and documentation needs.<\/li>\n<\/ul>\n

    FAQ for buyers and formulators<\/h3>\n

    Why do compliance-sensitive plastic additives need more than a basic specification check?<\/strong>
    Because end-use exposure, migration limits, and customer requirements can change whether an additive is commercially acceptable.<\/p>\n

    Is visual effect enough to justify additive selection in food-contact plastics?<\/strong>
    Usually no. Appearance needs to be reviewed together with processing, documentation, and compliance fit.<\/p>\n","protected":false},"excerpt":{"rendered":"

    In order to improve the whiteness of the production, we want to increase the amount of whitening agent to achieve the goal, but the result is not white but yellowing<\/p>","protected":false},"author":1,"featured_media":3016,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3014","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\nWhy the fluorescent whitening agent looks yellow and the solution - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"In order to improve the whiteness of the production, we want to increase the amount of whitening agent to achieve the goal, but the result is not white...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/hu\/why-the-fluorescent-whitening-agent-looks-yellow-and-the-solution\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why the fluorescent whitening agent looks yellow and the solution - 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