Hauv putty, cementum-raws li slurry, hpmc hydroxyproylcenty feem ntau yog cov nplaum thiab sag tsis kam ntawm cov slurry. Yam khoom xws li cua kub, ntsuas kub thiab cua kub yuav cuam tshuam tus nqi volatilization uas muaj kev phom sij, cementum-based khoom. Yog li ntawd, nyob rau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej ua kom ruaj khov ntawm cov khoom lag luam nrog tib tus nqi HPMC ntxiv. Hauv kev tsim kho tshwj xeeb, cov dej khaws cov nyhuv khaws cia ntawm cov slurry tuaj yeem hloov kho los ntawm nce lossis txo tus HPMC ntxiv.
Cov dej tuav tseg ntawm methyl cellulose hauv qab cov kev mob siab yog qhov ntsuas tau qhov ua tau zoo ntawm methyl cellulose ether. Cov khoom lag luam HPMC zoo dua tuaj yeem daws qhov teeb meem ntawm dej rov qab nyob hauv qab kub. Hauv cov caij nyoog kub, tshwj xeeb tshaj yog nyob rau hauv cov chaw kub thiab qhuav thiab nyias txheej HPMC yuav tsum txhim kho cov dej khaws cia ntawm cov slurry. Kev ua haujlwm siab HPMC tuaj yeem tig cov dej dawb rau hauv cov dej sib tov, yog li tswj tau cov dej evaporation los ntawm kev kub siab thiab ua tiav cov dej siab.
Kev zoo methyl cellulose tuaj yeem yog tusyees thiab cov khoom ntub dej, thiab cov dej ntub dej, thiab cov dej yuav raug tso tawm maj mam dhau lub sijhawm ntev. Cov kev txwv dej ntawm cov dej cawv muaj tshwm sim, yog li ua kom muaj zog ntawm lub zog thiab lub zog compressive ntawm cov khoom. Yog li ntawd, nyob rau hauv high-kub lub caij ntuj sov, nyob rau hauv thiaj li yuav ua tiav cov khoom siv rov qab los, nws yog ib qho tsim nyog los ntxiv cov khoom lag luam zoo HPMC zoo raws li cov qauv. Yog tias ib qho compound HPMC yog siv, dej tsis txaus, txo lub zog, tawg, thiab voids yuav tshwm sim vim qhuav. Cov teeb meem zoo xws li cov nruas thiab cov ntug dej kuj tseem nce teeb meem ntawm kev tsim kho rau cov neeg ua haujlwm. Raws li cov tee ntsuas kub, tus nqi HPMC ntxiv tuaj yeem txo qis qis, thiab tib cov nyhuv retentely yuav ua tiav.
Cov txheej txheem kev tiv thaiv kev tswj hwm tau tag nrho HPMC, thiab nws cov khoom hloov tau ua tiav thiab nws cov kev sib tw tau zoo heev. Nws cov kua aqueous yog qhov tseeb thiab pob tshab, nrog ob peb cov fibers dawb. Qhov sib xyaw nrog roj hmab hmoov, cov txiv qaub, txiv qaub thiab lwm cov ntaub ntawv tseem ceeb yog muaj zog, uas tuaj yeem ua rau cov khoom tseem ceeb ua si qhov kev ua tau zoo tshaj plaws. Txawm li cas los xij, HPMC nrog cov tshuaj tsis zoo muaj ntau cov neeg pub dawb, tsis sib npaug ntawm cov dej, ua rau muaj cov dej tsis zoo rau hauv huab cua siab. Txawm li cas los xij, hu ua HPMC (cov khoom sib xyaw ua ke) nrog cov nyiaj tsis yooj yim rau kev sib koom tes nrog txhua lwm yam, yog li cov dej khaws cia thiab lwm yam khoom muaj ntau yam. Thaum cov neeg txom nyem HPMC tsis zoo, muaj teeb meem tsawg dua li kev tsim kho, uas yuav ua rau muaj kev tsim kho luv, uas yuav txo tau qhov zoo ntawm lub tsev.
Lub Sijhawm Post: Dec-17-2022