Hydroxyethyl Cellulose (HEC) Nws muaj ntau txoj haujlwm, suav nrog: thickening, suspending, binding, emulsifying, film-forming, stabilizing, dispersing, retaining water, and forming protective colloids.Nws yog ib qho yooj yim heev soluble nyob rau hauv dej kub los yog txias, tuaj yeem tsim rau hauv cov kev daws teeb meem hauv ntau qhov viscosities, thiab muaj kev tiv thaiv zoo heev rau yaj electrolytes.
method ib)
Ntxiv ncaj qha thaum sib tsoo cov xim:
1. Ntxiv cov dej huv uas tsim nyog rau lub thoob loj uas muaj lub tshuab txiav siab siab (feem ntau, ethylene glycol, tus neeg sawv cev ntub dej thiab tus neeg ua yeeb yaj kiab tau ntxiv rau hauv cov kauj ruam no).
2. Pib stirring tsis tu ncua ntawm qhov ceev thiab maj mam sieve lub hydroxyethyl cellulose tusyees rau hauv cov tshuaj.
3. Txuas ntxiv stirring kom txog thaum tag nrho cov khoom yog soaked los ntawm.
4. Tom qab ntawd ntxiv cov tshuaj tua kab mob, alkaline additives xws li pigment dispersing aids, dej ammonia.
5. Sib tov kom txog thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj nce ntau heev) ua ntej ntxiv lwm yam khoom nyob rau hauv cov mis, thiab grind kom txog thaum nws yog xim av.
Txoj Kev Ob)
Nruab nrog niam cawv rau siv:
Txoj kev no yog thawj zaug npaj cov cawv niam nrog ntau dua concentration, thiab tom qab ntawd ntxiv rau cov xim latex.Qhov kom zoo dua ntawm txoj kev no yog tias nws muaj qhov yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov xim tiav, tab sis yuav tsum tau khaws cia kom zoo.Cov kauj ruam zoo ib yam li cov kauj ruam 1-4 nyob rau hauv txoj kev (1), qhov sib txawv yog tias tsis tas yuav muaj lub siab shear agitator, thiab tsuas yog qee cov agitators uas muaj lub zog txaus los ua kom cov hydroxyethyl cellulose tsis sib haum xeeb hauv cov tshuaj tuaj yeem siv. .Ntxiv mus tas li stirring kom txog thaum tag nrho yaj mus rau hauv ib tug viscous tov.Nws yuav tsum tau muab sau tseg tias tus neeg sawv cev antifungal yuav tsum tau ntxiv rau niam cawv kom sai li sai tau.
Txoj kev (3)
Rau porridge zoo li phenology:
Txij li cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo rau hydroxyethyl cellulose, cov kuab tshuaj organic no tuaj yeem siv los npaj porridge.Feem ntau siv cov kuab tshuaj organic yog cov kua organic xws li ethylene glycol, propylene glycol, thiab zaj duab xis qub (xws li, hexanediol lossis Butyl CARBITOL acetate) hauv cov xim pleev xim.Cov dej khov nab kuab kuj yog cov kuab tshuaj tsis zoo, yog li dej khov feem ntau siv nrog cov kua organic los npaj porridge.
Cov porridge zoo li hydroxyethyl cellulose tuaj yeem ncaj qha ntxiv rau cov xim.Cov hydroxyethyl cellulose tau txaus o nyob rau hauv lub xeev porridge.Thaum ntxiv rau cov xim, nws dissolves tam sim ntawd thiab thickens.Tom qab ntxiv, nws tseem yuav tsum tau stirring kom txog thaum lub hydroxyethyl cellulose yog tag yaj thiab uniform.
Feem ntau, porridge yog tov nrog rau 6 feem ntawm cov organic hnyav los yog dej khov thiab ib feem ntawm hydroxyethyl cellulose.Tom qab li 5-30 feeb, hydroxyethyl cellulose yuav hydrolyzed thiab o pom tseeb.Nyob rau lub caij ntuj sov, qhov kub ntawm cov dej yog siab dhau, thiab nws tsis haum rau porridge.
Cov teeb meem xav tau kev saib xyuas thaum npaj hydroxyethyl cellulose niam cawv:
Hydroxyethyl cellulose feem ntau yog cov hmoov ua tiav thiab cov khoom siv granular.Ntev npaum li cov teeb meem hauv qab no tau sau tseg, nws yooj yim los lis thiab yaj hauv dej.
1. Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, stirring tas li kom txog thaum cov tshuaj yog pob tshab thiab meej.
2. Nws yuav tsum tau sieved mus rau hauv lub sib tov chim maj mam.Tsis txhob ncaj qha ntxiv cov hydroxyethyl cellulose uas tau tsim rau hauv cov pob lossis cov pob rau hauv cov khoom sib xyaw.
3. Cov dej kub thiab pH tus nqi ntawm cov dej muaj ib qho kev sib raug zoo nrog kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them nyiaj tshwj xeeb rau nws.
4. Tsis txhob ntxiv qee cov tshuaj alkaline rau qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose yog soaked nrog dej.Kev nce cov pH tsuas yog tom qab ntub dej yuav pab kom tawg.
5. Raws li qhov ua tau, ntxiv cov tshuaj tua kab mob kom ntxov li sai tau.
6. Thaum siv high-viscosity hydroxyethyl cellulose, qhov concentration ntawm niam cawv yuav tsum tsis txhob siab tshaj 2.5-3% (los ntawm qhov hnyav), txwv tsis pub leej niam cawv yuav nyuaj.
Post lub sij hawm: Nov-15-2022