Yuav siv cov tshuaj fluorescent whitening li cas hauv cov yas (1):
qhuav whitening thiab ntub whitening
1. Qhuav ntxuav hniav dawb
Qhuav whitening ntawm plastics yog ntxiv ib co ntawm cov qhuav fluorescent whitening neeg sawv cev hmoov ncaj qha mus rau lub hauv paus cov ntaub ntawv ua ntej molding, ua ntej sib tov nrog cov yas puag cov ntaub ntawv, thiab thaum lub extruder ncav cuag lub yas melting kub, nyem qhov sib tov rau hauv lub hau. yog melted kom tusyees faib cov fluorescent whitening tus neeg sawv cev nyob rau hauv lub yaj, thiab thaum kawg granulated los yog nias.
Qhuav whitening yog tsuas yog siv rau kev txhaj tshuaj molding whitening ntawm nruj polyvinyl chloride, polyethylene, polypropylene, ABS thiab lwm yam thermoplastic resins. Fluorescent whitening agents siv rau qhuav whitening kuj pheej yig, tab sis muaj qhov tsis zoo ntawm cov plua plav loj loj thiab ib puag ncig muaj kuab lom.
2. ntub dej dawb
Txhawm rau txhim kho cov nyhuv dispersion, qee zaum (xws li polycarbonate) nws yog ib qho tsim nyog yuav tsum tau ntxiv ib qho nyiaj (kwv yees li 500mg / kg resin) ntawm binder, xws li butyl stearate, mus rau fluorescent whitening agent kom cov fluorescent whitening agent zoo dua. mus rau saum npoo ntawm cov ntaub ntawv los txo cov plua plav ya thiab kis kab mob. Tus neeg sawv cev fluorescent whitening kuj tuaj yeem raug faib rau hauv cov tshuaj ntxiv thiab ntxiv rau hauv cov khoom hauv daim ntawv ntawm additive dispersion. Piv txwv li, yog tias siv hauv cov mos polyvinyl chloride (PVC), nws tuaj yeem ua thawj zaug hauv 10% phthalate. Tom qab ntxiv cov tshuaj dioctyl formate plasticizer, ntxiv rau hauv cov khoom siv.
Nyob rau hauv ntub ntub dej, tus neeg sawv cev fluorescent whitening yog nyob rau hauv daim ntawv ntawm ib tug finely dispersed slurry. Txij li cov organic solvents uas tsis yog-volatile yog tov rau hauv plasticizer, nws muaj qhov tsis zoo ntawm kev nplaum. Txoj kev no feem ntau yog siv los ua kom tawv nqaij mos polyvinyl chloride.
3. Daim ntawv thov piv txwv
Daim ntawv thov piv txwv 1:
Yas fluorescent whitening tus neeg sawv cev FP muaj cov nyhuv ua kom zoo nkauj ntawm polyester zaj duab xis, PVC, PP, ABS, organic iav thiab lwm yam ntaub ntawv raw.
Yas hauv daim ntawv thov qhuav: FP=10000: 2 ~ 10000: 5 (mass ratio). Sib tov cov khoom siv raw ua ntej, tom qab ntawd ntxiv cov fluorescent whitening agent FP, do tusyees ntawm 160 degree rau li 5 feeb, thiab tom qab ntawd yob rau hauv ib daim ntawv.
Cov kuab tshuaj nyob rau hauv daim ntawv thov ntub: FP {{{0}}}: 1 ~ 3: 1 (mass ratio). Tus neeg sawv cev fluorescent whitening FP yog thawj zaug yaj nrog cov yas yas, thiab tom qab ntawd hauv av rau hauv qhov kev ncua los tsim ib tus niam cawv los ntawm peb lub tshuab sib tsoo. Tom qab ntawd, tus neeg sawv cev ntxuav hniav dawb yog sib xyaw ua ke rau hauv niam cawv thaum lub sijhawm ua haujlwm, thiab tsim ntawm qhov kub thiab txias, feem ntau ntawm 120 thiab 160 Nws yuav siv sijhawm li 0.5 teev, thiab tsuas yog siv li 1min ntawm 180 txog 190 los tsim cov nyhuv whitening. .
Daim ntawv thov piv txwv 2:
Fluorescent whitening agent OB-1 yog siv los ua kom dawb dawb polyvinyl chloride (PVC) cov nplooj ntawv nyuaj.
Formula (mass feem):
Octyl tin mercaptide 2. 8% ~ 3. 0%
Epoxy soybean roj octyl ester 1. 0% ~ 1. 5%
Glyceryl fatty acid ester 1.2%
Butyl stearate 1% ~ 1.3%
Kev hloov pauv cuam tshuam MBS 5% ~ 6%
Kev hloov kho K-120N 1. 8% ~ 2. 5%
Fluorescent whitening agent OB {{0}}. 01% ~ 0.05%
Calcium carbonate 20% ~ 30%
Txheej txheem whitening:
PVC cob, additives → Kneading → Cooling thiab mixing → Screening → Extrusion → Tuag shaping → Traction → Cooling thiab shaping → Trimming → Winding → tiav cov khoom
Txheej txheem whitening:Raws li cov qauv saum toj no, thawj zaug muab PVC resin thiab calcium carbonate rau hauv lub tshuab kneader, knead ntawm qhov kub thiab txias qis, thaum kub nce mus txog 60, ntxiv stabilizer, do rau 1 mus rau 2 feeb, thiab tom qab ntawd knead ntawm kev kub ceev. Ntxiv cov kev hloov kho thaum kub nce mus txog 80 degree, ntxiv lwm yam khoom ntxiv thaum kub nce mus txog 100 degree, kawg kneading thaum kub nce mus txog 110 degree, thiab hloov lub kneader los ntawm kev kub ceev mus rau qis ceev. Tshem tawm cov ntaub ntawv kneaded rau hauv lub tshuab cua txias thiab do ntawm qis ceev kom txias.
Pub cov khoom txias txias rau hauv ntxaib-ntsia hlau extruder, tswj cov ntsia hlau kub mus rau 110 degree, lub fuselage kub yuav tsum tau tswj ntawm 190 mus rau 160 degree, tuag kub yuav tsum tau tswj ntawm 180 mus rau 175 degree, thiab traction kub los ntawm 120 degree, 100 degree, 85 degree, 45 maj mam txo. Qhov ntsuas kub ntawm cov menyuam txias yog 20 ~ 25. Cov khoom siv extruded yog zoo li cov nplooj ntawv nyias los ntawm lub taub hau kov, thiab tom qab ntawd rub los ntawm lub raj los ntawm ntug trimming thav duab thiab nkag mus rau hauv lub tshuab winding kom tau cov khoom dov.
Daim ntawv thov piv txwv 3: Sib tov 0.01 qhov chaw ntawm stilbene fluorescent whitening agent nrog 70 qhov chaw ntawm PVC, 30 qhov chaw ntawm plasticizer thiab 2 qhov chaw ntawm stabilizer. Qhov sib tov tuaj yeem hauv av ntawm 150 rau 5 feeb los ua ib zaj duab xis. Yog tias yuav tsum tau npaj cov ntaub npog dawb, 2.5 feem ntawm TiO2 yuav tsum tau ntxiv rau cov khoom ua ntej grind.hauv.
