HPMC feem ntau ua lub luag haujlwm ntawm kev khaws dej thiab thickening hauv cov cement mortar thiab gypsum-based slurry, uas tuaj yeem txhim kho qhov cohesion thiab sag tsis kam ntawm cov slurry.
Cov yam xws li qhov kub thiab txias ntawm huab cua, qhov kub thiab txias thiab cua siab yuav cuam tshuam rau qhov dej evaporation ntawm cov dej hauv cov cement mortar thiab gypsum-based khoom. Yog li ntawd, nyob rau hauv ntau lub caij sib txawv, ntxiv tib tus nqi ntawm HPMC, cov dej khaws cia ntawm cov khoom muaj qee qhov sib txawv. Kev khaws cia dej ntawm methyl cellulose ether ntawm qhov kub thiab txias yog ib qho cim tseem ceeb los qhia qhov txawv ntawm qhov zoo ntawm methyl cellulose ether. HPMC zoo heev tuaj yeem daws qhov teeb meem ntawm kev khaws cia dej hauv qab qhov kub thiab txias. Hauv lub caij kub thiab txias, tshwj xeeb tshaj yog nyob rau hauv thaj chaw kub thiab qhuav thiab kev tsim kho nyias nyias ntawm sab hnub ci, HPMC zoo yog qhov yuav tsum tau ua kom zoo dua kev khaws cia dej ntawm cov slurry. HPMC zoo, nrog kev sib xws zoo heev, nws cov pab pawg methoxy thiab hydroxypropoxy tau faib sib npaug zos raws li cov saw hlau molecular cellulose, uas tuaj yeem txhim kho lub peev xwm ntawm cov pa oxygen ntawm cov hydroxyl thiab ether bonds los koom nrog dej los tsim cov hydrogen bonds, yog li cov dej dawb dhau los ua dej khi, yog li kom tswj tau qhov dej evaporation los ntawm huab cua kub thiab ua tiav kev khaws cia dej siab.
Cov cellulose HPMC zoo tuaj yeem sib xyaw thiab sib kis tau zoo hauv cov cement mortar thiab gypsum-based cov khoom, thiab encapsulates tag nrho cov khoom khov, thiab tsim cov zaj duab xis ntub dej, thiab cov dej noo hauv lub hauv paus maj mam tso tawm dhau lub sijhawm ntev. Cov tshuaj tiv thaiv hydration ntawm cov khoom coagulating tshwm sim, yog li ua kom muaj zog sib txuas thiab lub zog compressive ntawm cov khoom. Yog li ntawd, hauv kev tsim kho lub caij ntuj sov kub siab, txhawm rau kom ua tiav cov txiaj ntsig ntawm kev khaws dej, nws yog qhov tsim nyog los ntxiv cov khoom lag luam HPMC zoo raws li cov mis, txwv tsis pub, yuav muaj dej tsis txaus, txo lub zog, tawg, hollowing thiab poob tawm los ntawm kev qhuav sai dhau. Nws kuj ua rau muaj kev nyuaj ntawm kev tsim kho rau cov neeg ua haujlwm. Thaum qhov kub txo qis, qhov ntxiv ntawm HPMC tuaj yeem maj mam txo qis, thiab tib yam dej khaws cia tuaj yeem ua tiav.
Lub sijhawm tshaj tawm: Lub Peb Hlis-26-2022