Cov khoom uas fluorescent whitening agents rau cov yas yuav tsum muaj
Fluorescent whitening agent yog ib hom fluorescent dye, thiab qee cov ntaub ntawv hu nws cov xim dawb lossis xim tsis muaj xim. Qee cov ntaub ntawv hu nws cov xim xim tshwj xeeb xim xim raws li nws qhov kev siv tseem ceeb hauv cov yas los hloov cov yam ntxwv ntawm cov yas. Muaj ib hom kev lag luam muaj fluorescent whitening tus neeg sawv cev uas yog insoluble hauv dej tab sis soluble hauv cov kuab tshuaj organic. Hom fluorescent whitening tus neeg sawv cev no yog tsim rau cov yas. Txawm li cas los xij, yog tias nws yuav tsum tau siv rau cov yas ntxuav hniav dawb, tus neeg sawv cev fluorescent xaiv yuav tsum muaj cov khoom nram qab no raws li kev ua tau zoo, ua cov yam ntxwv thiab tshwj xeeb ntawm kev siv cov yas:
(1) Cov nyhuv whitening zoo dua.
High whiteness yog lub ntsiab tshwm sim ntawm cov nyhuv whitening ntawm fluorescent whitening agents. Qhov zoo ntawm qhov siab dawb tsis yog tsuas yog cuam tshuam nrog cov tsos ntawm cov yas, tab sis kuj muaj ntau yam zoo. Piv txwv li, siab dawb tuaj yeem txo qhov kev siv, yog li tiv thaiv cov yas Hloov hauv lub zog tuaj yeem txo cov nqi.
(2) Zoo heev kub stability.
Vim tias qhov kub ntawm cov khoom yas feem ntau yuav tsum nyob nruab nrab ntawm 150 thiab 280 degrees Celsius, nws yuav tsum tau siv cov tshuaj fluorescent whitening tus neeg siv yuav tsis decompose, hloov xim thiab poob cov nyhuv whitening nyob rau hauv qhov kub thiab txias.
(3) Nws muaj sublimation ceev ceev thiab huab cua ceev xws li hnub ci.
Vim tias cov yas dawb tau siv dav hauv cov khoom siv hauv tsev thiab kev tshaj tawm kev lag luam hauv xyoo tas los no, qhov no yuav tsum muaj cov tshuaj fluorescent whitening agents uas muaj kev tiv thaiv zoo heev rau cov cua sov sublimation thiab tshav ntuj raug thiab lwm yam kev nyab xeeb. Cov huab cua ceev ceev ntawm optical brighteners yog cuam tshuam los ntawm cov qauv ntawm cov teeb pom kev zoo thiab muaj feem xyuam rau cov nyiaj ntawm optical brighteners ntxiv.
(4) Nws muaj kev sib raug zoo nrog cov yas thiab zoo dispersion hauv lawv.
Qhov no yog ib qho tsim nyog los xyuas kom meej tias cov yas zoo sib xws. Lub molecular dispersion los yog ua tiav solubility ntawm optical brighteners yog ib qho tseem ceeb heev rau kev ua tiav high-efficiency optical whitening. Yog tias koj siv cov tshuaj fluorescent whitening agent los dyeing cov khoom dawb, koj thawj zaug muab cov tshuaj fluorescent whitening agent rau hauv cov cab cab los ua kom pom tseeb. Qhov kev mloog zoo no feem ntau hu ua xim masterbatch lossis masterbatch, thiab tom qab ntawd siv cov masterbatch xim rau ntau cov polymers. Thiab cov nyhuv kho qhov muag yog qhov zoo dua li kev ntxiv fluorescent whitening tus neeg sawv cev ncaj qha rau hauv cov resin. Lwm qhov piv txwv yog tias tom qab cov dej-insoluble fluorescent whitening agents uas tsis tshua muaj concentration yog dispersed nyob rau hauv dej, lawv yuav pom zoo optical teebmeem nyob rau hauv nylon thiab polyester fibers; thiab tus neeg sawv cev fluorescent whitening no yog ntxiv ncaj qha rau lub melted polymer npaj rau spinning. Hauv vivo, nws tsis pom muaj qhov cuam tshuam kho qhov muag. Qhov no yog vim hais tias nqus los ntawm cov dej dispersion dissolves tus neeg sawv cev fluorescent whitening nyob rau hauv daim ntawv ntawm molecules nyob rau hauv lub polymer matrix, thiab fluorescent whitening tus neeg sawv cev tov rau hauv lub polymer yaj tsuas yog dispersed nyob rau hauv daim ntawv ntawm aggregates nyob rau hauv zoo tshaj plaws. Qhuav hauv lub cev.
Rau cov xim xws li fluorescent whitening agents uas tsis zoo dispersion nyob rau hauv plastics, thiaj li yuav zoo disperse lawv, lawv feem ntau yuav tsum tau ua tiav ob zaug, uas yog, ib tug tej yam npaum li cas ntawm tus neeg ua hauj lwm los yog dispersant yog ntxiv rau cov xim kom nws ua ib tug Colorant. nrog zoo dispersing zog. Ntxiv nrog rau kev txhim kho cov dispersibility ntawm fluorescent whitening agent, kev xaiv ntawm kev ua los yog dispersing pab yuav tsum tau ceev faj kom tsis txhob ua rau ib tug txo nyob rau hauv lub cev lub zog ntawm cov yas.
(5) Nws muaj cov kuab tshuaj zoo, kev tsiv teb tsaws chaw thiab tshuaj lom neeg ruaj khov, thiab tsis muaj dej los yog rho tawm.
Nws yuav tsis tsiv teb tsaws vim kev tawg thaum nyob rau hauv kev sib cuag nrog cov kuab tshuaj los yog cov khoom uas muaj plasticizers. Nws muaj cov kua qaub zoo thiab alkali tsis kam thiab tsis ua rau muaj teeb meem tshuaj lom neeg nrog rau lwm cov khoom ntxiv hauv cov yas.
(6) Nws tsis muaj kev cuam tshuam rau kev ua haujlwm (xws li fluidity, lubrication, luam ntawv, txheej) thiab kev ua tau zoo (xws li hluav taws xob khoom, lub cev thiab cov khoom siv hluav taws xob, kev laus ua haujlwm, thiab lwm yam) ntawm cov yas.
(7) Nws yuav tsum muaj tshuaj tiv thaiv, hluav taws xob rwb thaiv tsev, thiab lwm yam.
(8) Nws yuav tsum tsis muaj tshuaj lom thiab tsis qab.
Qhov kev xav tau no tseem ceeb tshwj xeeb rau cov tshuaj fluorescent whitening agents siv hauv cov khoom noj thiab cov khoom ua si. Nws muaj feem xyuam rau tib neeg txoj kev noj qab haus huv thiab kev nyab xeeb ntawm lub neej. Hauv qee lub tebchaws, muaj cov kev cai nruj ntawm cov khoom siv kho qhov muag siv hauv cov khoom noj thiab cov khoom ua si.
Cov ntsiab lus saum toj no yog cov kev cai dav dav rau fluorescent whitening agents rau plastics. Feem ntau, muaj tsawg heev ntau yam uas ua tau raws li tag nrho cov kev cai no. Yog li ntawd, thaum siv, kev xaiv yuav tsum yog raws li lub hom phiaj ntawm kev siv, ib puag ncig yam thiab lwm yam xwm txheej.
