Yuav siv hydroxyethyl cellulose li cas hauv cov xim latex
1. Hydroxyethyl cellulose yog siv los ua porridge: Vim hydroxyethyl cellulose tsis yooj yim rau yaj hauv cov kuab tshuaj organic, qee cov kuab tshuaj organic tuaj yeem siv los npaj porridge. Cov dej khov kuj yog cov kuab tshuaj tsis zoo, yog li dej khov feem ntau siv ua ke nrog cov kua dej organic los npaj porridge. Porridge zoo li hydroxyethyl cellulose tuaj yeem raug ntxiv rau cov xim latex. Hydroxyethyl cellulose tau tag nrho soaked nyob rau hauv porridge. Thaum ntxiv rau cov xim, nws dissolves sai thiab ua raws li ib tug thickener. Tom qab ntxiv, stirring kom txog thaum hydroxyethyl cellulose yog dispersed thiab yaj. Feem ntau, porridge yog tsim los ntawm kev sib xyaw rau 6 feem ntawm cov kuab tshuaj organic lossis dej khov nrog ib feem ntawm hydroxyethyl cellulose. Tom qab li 5-30 feeb, hydroxyethyl cellulose yuav hydrolyzed thiab o pom tseeb. (Nco ntsoov tias cov av noo ntawm cov dej dav dav yog siab dhau rau lub caij ntuj sov, yog li nws yuav tsum tsis txhob siv los ua porridge.)
2. Ntxiv hydroxyethyl cellulose ncaj qha thaum sib tsoo cov xim: Txoj kev no yooj yim thiab siv sij hawm luv luv. Cov txheej txheem ntxaws yog raws li hauv qab no:
(1) Ntxiv qhov tsim nyog ntawm cov dej lim dej rau hauv lub thoob loj ntawm cov khoom sib tov siab (feem ntau, cov khoom siv ua yeeb yaj kiab thiab cov dej ntub dej ntxiv rau lub sijhawm no)
(2) Pib nplawm tsis tu ncua ntawm qhov ceev thiab maj mam thiab sib npaug ntxiv hydroxyethyl cellulose
(3) Txuas ntxiv do kom txog thaum tag nrho cov khoom sib npaug sib npaug thiab tsau
(4) Ntxiv cov tshuaj tiv thaiv kab mob los kho tus nqi PH
(5) Sib tov kom txog thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj nce ntau), ces ntxiv lwm yam khoom nyob rau hauv lub mis, thiab grind kom txog thaum cov xim yog tsim.
3. Npaj hydroxyethyl cellulose nrog niam cawv rau kev siv tom qab: Txoj kev no yog npaj niam cawv nrog siab dua ua ntej, thiab tom qab ntawd ntxiv rau cov xim latex. Qhov zoo ntawm txoj kev no yog tias nws hloov tau yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov xim tiav, tab sis nws yuav tsum tau khaws cia kom zoo. . Cov kauj ruam thiab txoj kev zoo ib yam li cov kauj ruam (1)-(4) nyob rau hauv txoj kev 2, qhov txawv yog tias tsis muaj high-shear agitator yog xav tau, thiab tsuas yog ib co agitators uas muaj hwj chim txaus los ua kom cov hydroxyethyl fiber ntau dispersed tusyees nyob rau hauv cov kev daws. . Txuas ntxiv mus kom tsis tu ncua kom txog thaum yaj tag rau hauv cov kua nplaum. Nws yuav tsum tau muab sau tseg tias tus neeg sawv cev antifungal yuav tsum tau ntxiv rau cov xim niam cawv kom sai li sai tau.
4 Cov teeb meem xav tau kev saib xyuas thaum npaj hydroxyethyl cellulose niam cawv
Txij li thaum hydroxyethyl cellulose yog cov hmoov ua tiav, nws yooj yim los lis thiab yaj hauv dej ntev npaum li cov khoom hauv qab no tau them rau.
(1) Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau nplawm tsis tu ncua kom txog thaum cov tshuaj yog pob tshab thiab meej.
(2) Nws yuav tsum tau maj mam sifted rau hauv lub tank tov, thiab tsis txhob ncaj qha ntxiv ib tug loj npaum li cas ntawm hydroxyethyl cellulose uas tau tsim lumps los yog pob rau hauv lub mixing tank.
(3) Cov dej kub thiab tus nqi pH hauv dej muaj kev sib raug zoo nrog kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them nyiaj tshwj xeeb.
(4) Tsis txhob ntxiv qee cov tshuaj alkaline rau qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose yog soaked nrog dej. Txhim kho pH tom qab ntub dej pab tshem tawm.
(5) Raws li qhov ua tau, ntxiv cov tshuaj tiv thaiv kab mob thaum ntxov.
(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.
Cov yam ntxwv cuam tshuam rau viscosity ntawm latex xim:
(1) Vim yog kev nplawm ntau dhau, cov av noo yog overheated thaum dispersion.
(2) Tus nqi ntawm lwm yam ntuj thickeners nyob rau hauv cov xim formulation thiab qhov piv ntawm tus nqi rau hydroxyethyl cellulose.
(3) Seb tus nqi ntawm cov surfactant thiab cov dej siv hauv cov xim pleev xim yog qhov tsim nyog.
(4) Thaum ua ke cov latex, cov ntsiab lus oxide xws li residual catalyst.
(5) Corrosion ntawm thickener los ntawm cov kab mob.
(6) Hauv cov txheej txheem xim, seb cov kauj ruam ntawm kev ntxiv cov thickener puas tsim nyog.
7 Cov npuas cua ntau nyob hauv cov xim, qhov viscosity siab dua
Post lub sij hawm: Mar-04-2023