1. Ntxiv ncaj qha thaum sib tsoo cov xim: Txoj kev no yog qhov yooj yim tshaj plaws thiab siv sijhawm tsawg. Cov kauj ruam ntxaws yog raws li nram no:
(1) Ntxiv cov dej huv uas tsim nyog rau lub vat ntawm lub siab-txiav agitator (feem ntau, ethylene glycol, wetting agent thiab film-forming agent yog tag nrho ntxiv rau lub sijhawm no)
(2) Pib stirring tsis tu ncua ntawm qhov ceev thiab maj mam ntxiv hydroxyethyl cellulose
(3) Txuas ntxiv stirring kom txog thaum tag nrho cov khoom yog soaked los ntawm
(4) Ntxiv cov tshuaj tua kab mob, PH adjuster, thiab lwm yam.
(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 nyob rau hauv lub mis, thiab grind kom txog thaum nws yog xim av.
2. Npaj cov cawv txiv hmab rau kev siv: Txoj kev no yog npaj cov niam cawv uas muaj concentration siab dua ua ntej, 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 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 1, qhov sib txawv yog tias tsis tas yuav muaj lub tshuab hluav taws xob siab, thiab tsuas yog qee cov agitators uas muaj lub zog txaus los ua kom cov hydroxyethyl fibers tsis sib haum xeeb hauv cov tshuaj 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 niam cawv kom sai li sai tau.
3. Rau porridge phenology: Txij li cov organic solvents yog cov kuab tshuaj tsis zoo rau hydroxyethyl cellulose, cov organic solvents tuaj yeem siv los npaj cov porridge. Feem ntau siv cov kuab tshuaj organic xws li ethylene glycol, propylene glycol, thiab cov neeg ua yeeb yaj kiab (xws li hexylene glycol lossis diethylene glycol butyl acetate), dej khov kuj yog cov kuab tshuaj tsis zoo, yog li dej khov feem ntau siv ua ke nrog cov kua dej organic. Npaj porridge.
Cov porridge zoo li hydroxyethyl cellulose tuaj yeem ncaj qha ntxiv rau cov xim. Cov hydroxyethyl cellulose tau o tag nrho hauv porridge. Thaum ntxiv rau cov xim, nws tam sim ntawd dissolves thiab thickens. Tom qab ntxiv, nws yuav tsum tau nplawm tsis tu ncua kom txog thaum hydroxyethyl cellulose yog yaj tag thiab zoo ib yam. 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, cov av noo ntawm cov dej dav dav yog siab dhau, thiab nws tsis haum rau siv porridge.
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 yog ib qho tsim nyog yuav tsum tau nplawm kom txog thaum cov tshuaj yog pob tshab thiab meej.
2) Nws yuav tsum tau muab tso rau hauv qhov sib tov maj mam, thiab tsis txhob ntxiv cov hydroxyethyl cellulose uas tau tsim rau hauv cov pob lossis cov pob ncaj qha rau hauv qhov sib tov.
3) Dej kub thiab pH tus nqi hauv dej muaj kev sib raug zoo nrog kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them 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