Hmoov putty yog ib yam khoom siv hauv tsev uas siv ntau, feem ntau yog ua los ntawm gypsum thiab lwm yam khoom ntxiv. Nws yog siv los sau cov qhov sib txawv, cov seams thiab cov kab nrib pleb hauv phab ntsa thiab qab nthab. Hydroxypropylmethylcellulose (HPMC) yog ib qho ntawm cov khoom ntxiv uas siv ntau tshaj plaws hauv hmoov putty. Nws muaj kev ua tau zoo heev ntawm kev khaws dej thiab kev nplaum zoo, 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 sib xyaw thiab kev dilution.
Kev sib xyaw yog ib kauj ruam tseem ceeb hauv kev npaj cov hmoov putty. Nws ua kom ntseeg tau tias txhua yam khoom xyaw tau faib sib npaug thiab cov khoom kawg tsis muaj pob thiab lwm yam tsis sib xws. Txawm li cas los xij, kev sib xyaw ntau dhau tuaj yeem ua rau HPMC cellulose tsis zoo. Kev sib xyaw ntau dhau tuaj yeem ua rau cellulose tawg, txo nws cov dej khaws cia thiab cov khoom nplaum. Yog li ntawd, cov putty yuav tsis lo rau ntawm phab ntsa thiab yuav tawg lossis tev tom qab siv.
Yuav kom tsis txhob muaj teeb meem no, nws yog ib qho tseem ceeb heev uas yuav tsum ua raws li cov lus qhia ntawm cov chaw tsim khoom rau kev sib tov cov hmoov putty. Feem ntau, cov lus qhia yuav qhia meej txog qhov ntau npaum li cas ntawm cov dej thiab lub sijhawm ntawm kev sib tov. Qhov zoo tshaj plaws, cov putty yuav tsum tau sib tov zoo kom tau txais cov qauv du thiab sib xws yam tsis muaj kev rhuav tshem cov cellulose.
Kev nyias nyias yog lwm yam tseem ceeb uas cuam tshuam rau qhov zoo ntawm HPMC cellulose hauv cov hmoov putty. Kev dilution txhais tau tias ntxiv dej lossis lwm yam tshuaj rau hauv putty kom yooj yim rau kev nthuav dav thiab tsim. Txawm li cas los xij, kev ntxiv dej ntau dhau yuav ua rau cov cellulose dilute thiab txo nws cov khoom khaws cia dej. Qhov no tuaj yeem ua rau putty qhuav sai dhau, ua rau tawg thiab ntsws.
Yuav kom tsis txhob muaj teeb meem no, nws yog ib qho tseem ceeb uas yuav tsum ua raws li cov lus qhia ntawm cov chaw tsim khoom rau kev dilute cov hmoov putty. Feem ntau, cov lus qhia yuav qhia meej txog qhov ntau npaum li cas ntawm cov dej lossis cov tshuaj yaj uas yuav tsum tau siv thiab lub sijhawm sib tov. Nws raug pom zoo kom ntxiv me ntsis dej maj mam thiab sib tov kom zoo ua ntej ntxiv. Qhov no yuav ua kom ntseeg tau tias cov cellulose tau tawg zoo hauv cov putty thiab khaws nws cov khoom khaws dej.
Hauv kev xaus lus, kev do thiab dilution yuav cuam tshuam rau qhov zoo ntawm HPMC cellulose hauv hmoov putty. Nws yog ib qho tseem ceeb kom ua raws li cov lus qhia ntawm cov chaw tsim khoom kom zoo zoo kom ntseeg tau tias cov cellulose khaws nws cov dej-tuav thiab clinging zog. Los ntawm kev ua qhov no, ib tug tuaj yeem tau txais cov putty zoo uas yuav muab cov txiaj ntsig zoo heev thiab xyuas kom meej tias ntev adhesion thiab durability.
Lub sijhawm tshaj tawm: Lub Yim Hli-03-2023