Hydroxypropyl Methyl Cellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic nrog kev siv dav thiab tseem ceeb hauv kev lag luam kev tsim kho. Vim nws khaws dej zoo, ua kom tuab, nplaum, tsim zaj duab xis thiab ua tau zoo, HPMC siv dav hauv cov cement mortar, cov ntaub ntawv gypsum, cov nplaum pobzeb, cov plag tsev uas nws tus kheej leveling, cov tshuaj pleev xim tsis muaj dej thiab lwm yam khoom siv hauv kev tsim kho, thiab tau dhau los ua ib qho khoom siv tseem ceeb hauv cov mortar qhuav sib xyaw niaj hnub.
1. Cov chaw thov tseem ceeb ntawm HPMC hauv kev tsim kho
1.1. Cov tshuaj cement thiab cov tshuaj qhuav sib xyaw
Lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC hauv cov cement mortar yog los txhim kho kev khaws dej thiab kev ua haujlwm ntawm kev tsim kho. Thaum lub sijhawm tsim cov cement mortar, HPMC tuaj yeem tiv thaiv dej kom tsis txhob nqus sai dhau los ntawm lub hauv paus lossis huab cua, yog li ua kom ntseeg tau tias cov cement tau hydrated tag nrho thiab txhim kho lub zog ntawm cov mortar. Tib lub sijhawm, nws kuj tseem tuaj yeem txhim kho qhov fluidity thiab kev ua haujlwm ntawm cov mortar, thiab zam cov teeb meem xws li kev tawg thiab kev tawg.
Hauv cov tshuaj khib qhuav, HPMC ua lub luag haujlwm tseem ceeb hauv qab no:
Txhim kho kev khaws dej thiab txhim kho lub zog thiab kev ruaj khov hauv theem tom qab ntawm kev tsim kho;
Txhim kho lubricity thiab workability, ua rau mortar yooj yim dua rau scrape;
Txhim kho kev tiv thaiv kev sagging, uas yog qhov tseem ceeb rau cov mortar siv rau kev tsim kho facade.
1.2. Cov nplaum rau pobzeb thiab cov grout rau pobzeb
Ntxiv HPMC rau cov nplaum pobzeb tuaj yeem ua rau muaj kev tiv thaiv zoo rau kev swb thiab kev nplaum thawj zaug, xyuas kom meej tias cov pobzeb raug txuas yam tsis swb, thiab txhim kho qhov zoo ntawm kev paving. Tib lub sijhawm, HPMC muab cov nplaum pobzeb zoo heev rau lub sijhawm qhib qeeb thiab kev ywj pheej, ua rau nws haum rau cov pobzeb loj thiab cov chaw tsim kho kub siab.
Ntxiv HPMC rau hauv cov vuas vov tuaj yeem txhim kho nws qhov kev ruaj khov ntawm kev khaws cia, kev ua haujlwm tau zoo thiab kev tiv thaiv dej, thiab tiv thaiv kom cov grout tsis txhob ntsws lossis ua hmoov thaum lub sijhawm ziab.
1.3. Cov khoom siv ua los ntawm gypsum
HPMC yog ib qho khoom siv zoo tshaj plaws rau gypsum plaster, gypsum board, thiab gypsum putty. Nws cov dej tuav tau tuaj yeem ua rau qeeb qeeb ntawm cov dej noo ntawm gypsum, pab txhawb kev ua haujlwm tsim kho, thiab tiv thaiv cov kab nrib pleb los ntawm kev qhuav sai dhau. Rau cov tshuab txau gypsum, HPMC kuj tseem tuaj yeem muab kev nqus dej zoo thiab kev nplaum ntsug.
1.4. Pem teb uas nws tus kheej leveled
Cov tshuaj mortar uas nws tus kheej leveling xav tau qhov fluidity thiab stability siab. HPMC tuaj yeem tswj tau qhov rheology, tiv thaiv dej seepage thiab sedimentation, thiab tswj tau qhov flowability zoo, ua rau hauv av leveling du thiab ua haujlwm tau zoo dua.
1.5. Lub Tshuab Rwb Thaiv Sab Nraud (EIFS)
Hauv lub tshuab rwb thaiv tsev phab ntsa sab nraud, HPMC feem ntau siv rau hauv kev sib txuas mortar thiab plastering mortar kom txhim kho nws txoj kev tiv thaiv tawg, kev ywj pheej thiab kev tiv thaiv huab cua. HPMC kuj tseem tuaj yeem ua kom muaj kev sib txuas zoo ntawm lub rooj tsavxwm rwb thaiv tsev thiab txheej hauv paus, txuas ntxiv lub neej tag nrho ntawm lub kaw lus.
1.6. Txheej tiv dej
Ntxiv HPMC rau hauv cov txheej txheem dej tsis tsuas yog txhim kho qhov ruaj khov thiab cov khoom ua zaj duab xis ntawm cov txheej txheem, tab sis kuj txhim kho qhov du thiab sib xws ntawm kev tsim kho. Tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv dej tsis muaj cement, HPMC tuaj yeem txhim kho qhov yooj ywm tag nrho thiab lub zog sib txuas thiab tiv thaiv dej ntws los ntawm cov kab nrib pleb me me.
2. Lub ntsiab mechanism ntawm kev ua haujlwm ntawm HPMC
2.1.Kev khaws dej:
HPMC muaj kev nqus dej zoo heev thiab muaj peev xwm xauv dej, uas tuaj yeem khaws cov dej uas xav tau rau cov cement lossis gypsum hydration ntawm cov qhov chaw porous lossis nyob rau hauv qhov kub thiab txias thiab qhuav, uas pab txhim kho lub zog kawg thiab kev tiv thaiv tawg.
2.2. Cov nyhuv ua kom tuab:
HPMC tuaj yeem txhim kho qhov viscosity thiab kev ruaj khov ntawm cov slurry hauv tsev, yog li txhim kho kev ua haujlwm ntawm kev tsim kho, ua rau cov khoom siv tsis yooj yim rau sagging thiab yooj yim rau kev khiav lag luam.
2.3Txhim kho kev ua tau zoo ntawm kev tsim kho:
HPMC muab cov khoom siv hauv tsev zoo lubricity thiab operability, ua rau scraping thiab smearing yooj yim dua thiab du.
2.4Kev ua tau zoo dua ntawm kev sib txuas:
Los ntawm kev txhim kho lub zog sib txuas ntawm cov khoom sib txuas, HPMC tuaj yeem txhim kho lub zog lo ntawm cov mortar rau cov ntaub ntawv xws li lub hauv paus lossis cov vuas.
2.5Lub sijhawm qhib ntev dua:
Hauv qhov kub thiab txias lossis qhov chaw qhuav cua, HPMC tuaj yeem ncua qhov dej evaporation, muab sijhawm ntev dua rau cov neeg ua haujlwm thiab txhim kho kev ua haujlwm engineering.
2.6Cov khoom ua yeeb yaj kiab:
HPMC tuaj yeem tsim cov zaj duab xis tiv thaiv sib xws thiab ntom tom qab ziab, txhim kho kev hnav tsis kam, dej tsis kam thiab huab cua tsis kam ntawm cov txheej lossis cov mortars. Ua ib qho tseem ceeb ua haujlwm additive hauv cov ntaub ntawv niaj hnub,
hydroxypropyl methylcellulose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm kev tsim kho, txhim kho kev ua haujlwm ntawm cov khoom thiab txuas ntxiv lub neej kev pabcuam. Txawm hais tias nyob rau hauv cov txheej txheem mortar ib txwm muaj lossis hauv cov khoom siv niaj hnub sib xyaw ua ke qhuav, kev tswj tus kheej, kev tiv thaiv dej thiab lwm yam khoom siv hauv tsev ua haujlwm siab, HPMC qhia tau tias muaj kev hloov pauv tau zoo thiab muaj peev xwm ua kom zoo dua. Nrog rau kev txhim kho cov ntaub ntawv hauv tsev ntsuab thiab kev lag luam hauv kev tsim kho, cov xwm txheej thov thiab tus nqi ntawm HPMC yuav txuas ntxiv nthuav dav.
Lub sijhawm tshaj tawm: Lub Xya Hli-05-2025