Putty hmoov yog ib qho siv tau siv cov khoom siv tsev, tsuas yog ua los ntawm gypsum thiab lwm yam ntxiv. Nws yog siv los sau qhov khoob, seams thiab cov kab nrib pleb hauv phab ntsa thiab nthab. Hydroxypropyloostrose (HPMC) yog ib qho ntawm feem ntau cov khoom ntxiv hauv putty hmoov. Nws muaj dej zoo heev ua tau zoo thiab zoo adhesion, uas tuaj yeem txhim kho kev ua haujlwm thiab lub zog ntawm putty. Txawm li cas los xij, qhov zoo ntawm HPMC cellulose tuaj yeem cuam tshuam los ntawm ntau yam, xws li kev ntxhov siab thiab dilution.
Stirring yog ib kauj ruam tseem ceeb hauv kev npaj ntawm hmoov stty. Nws kom ntseeg tau tias tag nrho cov khoom xyaw yog felly faib thiab hais tias cov khoom kawg yog dawb ntawm cov lumps thiab lwm yam xwm txheej tsis xwm yeem. Txawm li cas los xij, kev ntxhov siab ntau dhau tuaj yeem ua rau tsis zoo HPMC cellulose. Kev ntxhov siab ntau dhau tuaj yeem ua rau lub cellulose kom tawg, txo nws cov dej khaws cia thiab cov khoom nplaum. Raws li qhov tshwm sim, lub putty yuav tsis ua raws li ntawm phab ntsa thiab tej zaum yuav tawg lossis tev tom qab daim ntawv thov.
Txhawm rau zam qhov teeb meem no, nws yog ib qho tseem ceeb heev uas yuav ua raws li cov khw cov lus qhia rau kev sib xyaw cov hmoov ua kom muaj mov. Feem ntau, cov lus qhia yuav hais kom muaj cov dej kom haum thiab lub sijhawm thaum muaj kev ntxhov siab. Qhov tsim nyog, lub putty yuav tsum tau ua kom zoo kom tau txais ib tug du thiab xwm txheej tsis muaj zog yam tsis muaj kev rhuav tshem cov cellulose.
Thinning yog lwm qhov tseem ceeb cuam tshuam rau qhov zoo ntawm HPMC cellulose hauv Putty hmoov. Dilution yog hais txog cov dej lossis lwm yam kuab tshuaj rau lub putty kom nws yooj yim dua mus rau lwm tus thiab txua. Txawm li cas los xij, ntxiv cov dej ntau dhau yuav dilute lub cellulose thiab txo nws cov khoom siv dej kom ceev. Qhov no tuaj yeem ua rau lub putty kom qhuav sai dhau, ua rau tawg thiab shrinkage.
Txhawm rau zam cov teeb meem no, nws yog ib qho tseem ceeb kom ua raws li cov chaw tsim khoom cov lus qhia rau diluting cov hmoov puty. Feem ntau, cov lus qhia yuav hais kom muaj dej kom zoo lossis siv cov kuab tshuaj kom siv thiab lub sijhawm sib xyaw. Nws raug nquahu kom ntxiv cov dej me me thiab sib tov zoo ua ntej ntxiv. Qhov no yuav xyuas kom lub cellulose tau muab faib ua kom zoo rau hauv lub putty thiab khaws nws cov dej-khaws cov khoom.
Txhawm rau kom suav, nplawm thiab dilution yuav cuam tshuam rau qhov zoo HPMC cellulose hauv Putty hmoov. Nws yog ib qho tseem ceeb kom ua raws li cov neeg tsim cov lus qhia kom ua tib zoo kom ntseeg tau tias cov cellulose khaws nws cov dej-khaws cia thiab tuav cov khoom. Los ntawm kev ua qhov no, ib qho tuaj yeem tau txais cov txiaj ntsig zoo ntawm cov zaub mov uas yuav muab cov txiaj ntsig zoo thiab ua kom muaj adhesion ntev thiab ntev.
Lub sij hawm Post: Lub Yim Hli 03-2023