Putty hmoov yog cov khoom siv hauv tsev, feem ntau yog ua los ntawm gypsum thiab lwm yam khoom siv ntxiv. Nws yog siv los sau qhov khoob, seams thiab tawg ntawm phab ntsa thiab qab nthab. Hydroxypropylmethylcellulose (HPMC) yog ib qho ntawm feem ntau siv additives hauv putty hmoov. Nws muaj cov dej tuav tau zoo heev 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 agitation thiab dilution.
Stirring yog ib kauj ruam tseem ceeb hauv kev npaj cov hmoov putty. Nws xyuas kom meej tias tag nrho cov khoom xyaw sib npaug sib npaug thiab cov khoom kawg yog tsis muaj pob thiab lwm yam tsis zoo. 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 cov cellulose tawg, txo nws cov dej tuav thiab cov khoom nplaum. Yog li ntawd, lub putty yuav tsis ua raws li cov phab ntsa thiab yuav tawg los yog tev tom qab thov.
Txhawm rau zam qhov teeb meem no, nws tseem ceeb heev uas yuav tsum ua raws li cov chaw tsim khoom cov lus qhia rau kev sib xyaw cov hmoov putty. Feem ntau, cov lus qhia yuav qhia txog qhov tsim nyog ntawm cov dej thiab lub sijhawm ntawm kev ntxhov siab. Qhov zoo tshaj plaws, lub putty yuav tsum tau zoo stirred kom tau ib tug du thiab zoo ib yam kev ntxhib los mos tsis ua txhaum ntawm cellulose.
Thinning yog lwm qhov tseem ceeb cuam tshuam rau qhov zoo ntawm HPMC cellulose hauv putty hmoov. Dilution yog hais txog kev ntxiv dej los yog lwm yam kuab tshuaj rau hauv lub putty kom nws yooj yim rau kis thiab tsim. Txawm li cas los xij, ntxiv dej ntau dhau yuav dilute cellulose thiab txo nws cov dej tuav cov khoom. Qhov no tuaj yeem ua rau putty qhuav sai heev, ua rau tawg thiab shrinkage.
Txhawm rau zam qhov teeb meem no, nws yog ib qho tseem ceeb uas yuav tsum ua raws li cov chaw tsim khoom cov lus qhia rau diluting cov hmoov putty. Feem ntau, cov lus qhia yuav qhia txog qhov tsim nyog ntawm cov dej lossis cov kuab tshuaj siv thiab lub sijhawm sib xyaw. Nws raug nquahu kom ntxiv cov dej me me maj mam thiab sib tov zoo ua ntej ntxiv. Qhov no yuav ua kom ntseeg tau tias cov cellulose tau tawg zoo nyob rau hauv putty thiab khaws nws cov dej khaws cia.
Txhawm rau ua kom tiav, nplawm thiab dilution yuav cuam tshuam qhov zoo ntawm HPMC cellulose hauv putty hmoov. Nws yog ib qho tseem ceeb uas yuav tsum tau ua raws li cov chaw tsim khoom cov lus qhia ua tib zoo xyuas kom ntseeg tau tias cov cellulose khaws nws cov dej tuav thiab clinging zog. Los ntawm kev ua qhov no, ib tus tuaj yeem tau txais cov putty zoo uas yuav muab cov txiaj ntsig zoo thiab ua kom cov adhesion ntev thiab kav ntev.
Post lub sij hawm: Aug-03-2023