Methyl hydrotyl cellulose (MHEC) yog ib qho kev hloov ntawm cellulose ether. Nws cov qauv theem pib yog lub cellulose saw, thiab cov khoom tshwj xeeb tau los ntawm kev qhia methyl thiab hydroxyethyl hloov chaw. MHEC tau dav siv hauv cov ntaub ntawv hauv tsev, cov tsho tiv no, tshuaj txhua hnub, cov tshuaj thiab khoom noj.
1. Lub luag haujlwm hauv cov ntaub ntawv tsim
1.1. Dej ceev
Hauv cov paj ntaub ntawv sib xyaw thiab cov khoom siv gypsum, lub luag haujlwm tseem ceeb ntawm MHEC yog muab dej kom zoo zoo. MHEC tuaj yeem ua kom dej los ntawm volatilizing yooj yim, kom muaj cov khoom siv kom txaus, yog li kev txhim kho cov dej khov kho ntawm cov cement thiab cov crystallization degree ntawm gypsum. Qhov kev ua yeeb yam khaws cia ua kom muaj lub luag haujlwm tseem ceeb hauv kev tiv thaiv kev tawg ua kom nrawm nrawm, txhim kho kev tsim kho thiab cov khoom zoo.
1.2. Thickening thiab txhim kho cov haujlwm ua haujlwm
MHEC kuj tau ua lub luag haujlwm tuab hauv cov cug qhuav, cov vuas nplaum, putty thiab lwm yam khoom, txhim kho cov viscosity thiab cov viscosity thiab viscosity ntawm cov khoom. Qhov no cov nyhuv tuab no pab txhim kho kev ua tau zoo, ua kom cov khoom siv tau yooj yim dua thiab kho cov txheej txheem ua tau zoo thiab txo qis qis. Tsis tas li ntawd, cov nyhuv tuab ntawm MHEC tuaj yeem zam kev sedimentation thiab sagging thaum lub sijhawm tsim kho, thiab txhim kho qhov zoo ntawm kev tsim kho.
1.3. Ua kom muaj zog ntxiv
Los ntawm kev ntxiv MHEC rau cov mis, cov nyiaj sib zog ntawm cov khoom siv xws li cug thiab cov nplaum muaj peev xwm txhim kho. Thaum lub sij hawm cov txheej txheem tawv tawv, MHEC tuaj yeem tsim cov qauv mesh zoo li, uas txhim kho cov qauv khoom ntawm cov khoom thiab yog li txhim kho kev ua tau zoo. Qhov no yog qhov tseem ceeb heev rau kom ntseeg tau cov nyhuv bonding ntawm cov ntaub ntawv xws li txheej thiab vuas nrog lub substrate.
1.4. Txhim kho kev tiv thaiv tawm tsam
Thaum lub sijhawm plaster txheej txheem, MHEC tuaj yeem tiv thaiv txoj kab khib los ntawm sagging, ua cov plastering txheej thickness niaj hnub zoo li qub thiab lub ntsej muag du. Nyob rau hauv cov nplais nplaum, nws tseem tuaj yeem txhim kho cov kev ua tau zoo los ntawm cov nplaum, ua kom cov vuas tsis muaj peev xwm hloov pauv thaum lub sijhawm paving.
2. Lub luag haujlwm hauv cov txheej txheem txheej txheem
2.1. Thickening thiab rheological hloov kho
MHEC yog siv los ua cov tuab tuab hauv cov xim looj kua yas, cov roj pleev xim thiab lwm cov txheej txheej los kho cov khoom sib dhos ntawm cov txheej. Nws tuaj yeem khaws cov xim ntawm qhov tsim nyog viscosity, yog li ntawd nws muaj kev vam meej zoo thaum lub sijhawm kev tsim kho thiab zam kev sagging thiab txhuam cov cim. Ib qho ntxiv, cov nyhuv tuab ntawm MHEC tuaj yeem ua kom cov xim muaj qhov chaw cia khoom ruaj khov thaum zoo li qub.
2.2. Emulsification thiab Ruaj Khov
MHEC muaj ib qho emulsification thiab cov nyhuv ruaj khov. Nws tuaj yeem ua rau cov pigments thiab fillers nyob rau hauv cov xim, tiv thaiv cov xim los ntawm kev sib tw thiab kev sib txawv ntawm cov xim, thiab yog li txhim kho qhov zoo ntawm txheej.
2.3. Dej tuav thiab ua yeeb yaj duab sib sau
Nyob rau hauv cov xim, cov dej khaws cia ntawm MHEC tuaj yeem ncua kev ua yeeb yaj kiab ntawm cov dej, thiab txhim kho cov nyhuv durabilation thiab zoo nkauj ntawm zaj duab xis.
3. Lub Luag Haujlwm Hauv Cov Khoom Siv Tshuaj Txhua Hnub
3.1. Sam xim
Hauv cov khoom lag luam txhua hnub xws li cov tshuaj ntxuav tes, cov tshuaj ntxuav tes, thiab cov khoom siv kom huv, tuaj yeem txhim kho cov kev siv thiab cov nyhuv thov.
3.2. Lub stababilizer
MHEC kuj ua raws li cov khoom siv stabilizer nyob rau hauv cov khoom siv tshuaj txhua hnub, tuaj yeem sib cav los nag, thiab ua kom cov khoom lag luam zoo thaum lub sijhawm ntev cia.
3.3. Moisturizing thiab tiv thaiv
Vim tias cov dej zoo ua tau zoo ntawm MHEC, nws tseem tuaj yeem muab cov khoom siv noo noo xws li cov tawv nqaij ua kom txhua hnub kom tiv thaiv cov tshuaj tua cov tawv nqaij kom zoo nkauj thiab kev tiv thaiv kev ua haujlwm ntawm cov khoom.
4. Lub luag haujlwm hauv cov tshuaj thiab khoom noj
4.1. Kev Tso Tawm Tso Tawm Thiab Txheej
MHEC feem ntau siv los ua cov khoom siv txheej thiab tswj cov neeg sawv cev tso tawm rau cov ntsiav tshuaj hauv cov tshuaj hauv tsev kws tshuaj. Nws tuaj yeem tswj cov tshuaj tso tawm, txhim kho lub durability thiab muaj kev ruaj ntseg ntawm kev noj tshuaj muaj txiaj ntsig, thiab txhim kho cov tshuaj thiab cov ntsiav tshuaj zoo li qub.
4.2. Thickening thiab ruaj khov
Hauv kev lag luam khoom noj khoom haus, MHEC tau siv ua cov ntaub tuab thiab cov khoom noj, tiv thaiv cov khoom noj khoom haus, dej nag thiab nag lossis daus, thiab dej nag lossis dej nag.
4.3. Cov Khoom Noj Ntxiv
Raws li cov zaub mov ntxiv, mHEC tau siv los txhim kho kev ua kom muaj zog, tso dej ua kom zoo nkauj thiab ruaj khov ntawm cov khoom ci thiab cov ncuav qab zib thiab saj zoo dua.
5. Lub cev thiab tshuaj lom neeg
5.1. Dej solubility
MHEC tuaj yeem yaj hauv ob qho dej txias thiab dej kub kom tsim lub pob tshab, daws tau. Qhov dej solubility no ua rau nws yooj yim rau disperse thiab siv nyob rau ntau yam kev siv.
5.2. Tshuaj Muaj Peev Xwm
MHEC muaj tshuaj lom neeg zoo, muaj zog rau cov acids, alkalis thiab ntsev, thiab tsis yooj yim rau nws muaj ntau yam kev cia siab hauv cov khoom siv ntau yam.
5.3. Biocompatibility
Txij li MHEC yog cov tsis-ionic cellulose ether, nws muaj zoo biocompatibility thiab tsis yog-khaus rau ntawm daim tawv nqaij thiab tib neeg lub cev, yog li nws tau siv dav hauv cov tshuaj txhua hnub thiab tshuaj kho.
Raws li lub cellulose cellulose ether, MHEC ua lub luag haujlwm tseem ceeb hauv ntau cov teb, khaws cov khoom noj, thiav ua txhua hnub, thickesen thiab tshuaj lom neeg ruaj khov. Nws cov ntawv thov dav tsis yog txhim kho kev ua tau zoo thiab cov khoom lag luam zoo, tab sis kuj tseem muab kev txhawb nqa cov khoom siv ua haujlwm thiab kev tsim kho tshiab hauv kev lag luam ntau yam lag luam.
Lub Sijhawm Post: Feb-17-2025