Yuav siv hydroxyethyl cellulose li cas hauv cov xim latex
1. Hydroxyethyl cellulose yog siv los npaj 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 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 latex.Cov hydroxyethyl cellulose tau o tag nrho hauv porridge.Thaum ntxiv rau cov xim, nws dissolves sai thiab plays lub luag hauj lwm thickening.Tom qab ntxiv, nws tseem yuav tsum tau ua kom stirring kom txog thaum hydroxyethyl cellulose yog tag nrho dispersed thiab yaj.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.(Nws tau pom tias cov av noo ntawm cov dej dav dav yog siab dhau rau lub caij ntuj sov, yog li nws tsis tsim nyog siv rau porridge.)
2. Ntxiv hydroxyethyl cellulose ncaj qha thaum sib tsoo cov xim: Txoj kev no yooj yim thiab siv sij hawm tsawg.Cov txheej txheem ntxaws yog raws li hauv qab no:
(1) Ntxiv cov dej ntshiab uas tsim nyog rau lub vat ntawm lub siab-txiav agitator (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 stirring kom txog thaum tag nrho cov khoom yog dispersed tusyees thiab soaked
(4) Ntxiv cov tshuaj tua kab mob los kho tus nqi PH
(5) Do kom txog rau thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj nce ntau), ces ntxiv lwm yam nyob rau hauv lub mis, thiab grind kom txog thaum nws yog xim av.
3. Npaj hydroxyethyl cellulose nrog niam cawv rau kev siv: Txoj kev no yog npaj niam cawv nrog ntau dua concentration ua ntej, thiab tom qab ntawd ntxiv rau cov xim latex.Qhov kom zoo dua ntawm txoj kev no yog tias nws 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) hauv txoj kev 2, qhov sib txawv yog tias tsis tas yuav muaj lub tshuab hluav taws xob siab, thiab tsuas yog qee cov agitators uas muaj hwj chim txaus los ua kom cov hydroxyethyl fibers tsis sib haum xeeb hauv cov agitator. kev daws yog siv.Ua tau.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 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 yog ib qho yooj yim los lis thiab yaj hauv dej ntev npaum li cov teeb meem hauv qab no tau sau tseg.
(1) Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau stirring kom txog thaum cov tshuaj yog pob tshab thiab meej.
(2) Nws yuav tsum tau sieved rau hauv lub thawv sib tov maj mam.Tsis txhob ncaj qha ntxiv cov hydroxyethyl cellulose uas tau tsim rau hauv cov pob thiab cov pob rau hauv cov khoom sib xyaw hauv cov khoom loj lossis ncaj qha.
(3) Dej kub thiab pH tus nqi hauv dej muaj kev sib raug zoo rau kev tawg 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.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.
Cov yam ntxwv cuam tshuam rau viscosity ntawm latex xim:
(1) Cov av noo yog overheated thaum lub sij hawm dispersion vim ntau stirring.
(2) Qhov ntau npaum li cas ntawm lwm yam ntuj thickeners thiab ntau npaum li cas ntawm hydroxyethyl cellulose nyob rau hauv cov xim xim.)
(3) Seb tus nqi ntawm cov surfactant thiab cov dej hauv cov xim pleev xim yog qhov tsim nyog.
(4 Thaum synthesizing latex, tus nqi ntawm residual catalyst thiab lwm yam oxides.
5 Microbial erosion ntawm thickeners.
6 Thaum lub sijhawm ua cov xim pleev xim, cov txheej txheem ntawm kev ntxiv cov thickeners puas tsim nyog?
7 Qhov siab dua cov ntsiab lus ntawm cov npuas npuas nyob hauv cov xim, qhov viscosity siab dua
Post lub sij hawm: Nov-02-2022