HPMC Hydroxypropyl methyl cellulose nyob rau hauv cov cement mortar thiab gypsum slurry, feem ntau ua si lub luag haujlwm ntawm dej tuav thiab thickening, tuaj yeem txhim kho qhov adhesion thiab sag kuj ntawm slurry.
Cov huab cua kub, qhov kub thiab cua siab npaum li cas tuaj yeem cuam tshuam tus nqi evaporation ntawm cov dej hauv cov cement mortar thiab gypsum raws li cov khoom.Yog li nyob rau lub caij sib txawv, ntxiv hydroxypropyl methyl cellulose tib tus nqi ntawm cov khoom tuav dej muaj qee qhov sib txawv.Hauv kev tsim kho vaj tse, cov dej tuav cov nyhuv ntawm slurry tuaj yeem hloov kho los ntawm kev nce lossis txo tus nqi ntawm HPMC.Cov dej tuav ntawm methyl cellulose ether ntawm qhov kub thiab txias yog ib qho tseem ceeb qhia kom paub qhov zoo ntawm methyl cellulose ether.
Cov khoom siv zoo heev hydroxypropyl methyl cellulose series tuaj yeem daws qhov teeb meem ntawm dej tuav hauv qhov kub thiab txias.Nyob rau hauv lub caij kub kub, tshwj xeeb tshaj yog nyob rau hauv kub thiab qhuav thiab nyias txheej tsim nyob rau hauv tshav ntuj sab, yuav tsum tau zoo HPMC los txhim kho cov dej tuav ntawm slurry;hydroxypropyl methyl cellulose (HPMC), uniformity yog zoo heev, nws yog ib tug oxygen thiab oxygen hydroxypropyl pawg tusyees faib nyob rau hauv lub cellulose saw, muaj peev xwm txhim kho cov hydroxyl thiab ether oxygen thiab dej nyob rau hauv lub tseem ceeb associating daim ntawv hydrogen bonding muaj peev xwm, ua dawb dej ntawm hydration, thiaj li ua tau zoo tswj cov huab cua kub los ntawm cov dej noo kom evaporate, Ua tiav cov dej khaws cia siab.
Cov khoom zoo ntawm hydroxypropyl methyl cellulose tuaj yeem sib npaug thiab ua haujlwm zoo hauv cov khoom siv cement mortar thiab plaster, thiab pob tag nrho cov khoom siv, thiab tsim ib txheej ntawm wetting zaj duab xis, cov dej noo nyob rau hauv lub hauv paus rau lub sij hawm ntev maj mam tso tawm, thiab inorganic cementitious khoom hydration tshuaj tiv thaiv. , yog li txhawm rau xyuas kom meej lub zog ntawm daim ntawv cog lus thiab compressive zog ntawm cov ntaub ntawv.
Hauv kev tsim kho, txhawm rau kom ua tiav cov txiaj ntsig ntawm kev txuag dej, yuav tsum tau ntxiv cov khoom zoo HPMC raws li cov qauv, txwv tsis pub, yuav qhuav sai heev los ntawm cov dej tsis txaus, txo lub zog, tawg, hollow nruas thiab shedding zoo. teeb meem, tab sis kuj ua rau kom muaj kev nyuaj ntawm cov neeg ua haujlwm kev tsim kho.Raws li qhov kub thiab txias, cov dej HPMC tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Post lub sij hawm: Dec-21-2021