Hydroxypropyl methylcellulose feem ntau yog siv los ua ib qho dispersant hauv kev tsim cov polyvinyl chloride, thiab yog tus neeg sawv cev tseem ceeb rau kev npaj PVC los ntawm kev ncua polymerization. Nyob rau hauv cov txheej txheem ntawm kev tsim kho kev lag luam, nws yog tsuas yog siv nyob rau hauv mechanized kev tsim kho xws li phab ntsa tsev, plastering, caulking, thiab lwm yam .; tshwj xeeb tshaj yog nyob rau hauv kev tsim kho kom zoo nkauj, nws yog siv los paste ceramic vuas, marble, thiab yas decorations. Nws muaj kev sib raug zoo siab thiab tuaj yeem txo cov cement. . Nws yog siv los ua cov thickener hauv kev lag luam xim, uas tuaj yeem ua rau cov txheej txheem ci ntsa iab thiab muag heev, tiv thaiv cov hmoov tshem tawm, txhim kho qib kev ua tau zoo, thiab lwm yam.
Hauv cov cement mortar thiab gypsum-raws li slurry, hydroxypropyl methylcellulose tsuas yog ua lub luag haujlwm ntawm dej tuav thiab thickening, uas tuaj yeem txhim kho lub zog cohesive thiab sag resistance ntawm slurry. Cov yam ntxwv xws li huab cua kub, kub thiab cua siab ceev yuav cuam tshuam rau cov volatilization tus nqi ntawm cov dej hauv cement mortar thiab gypsum-based khoom. Yog li ntawd, nyob rau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej tuav cov khoom nrog tib tus nqi ntawm hydroxypropyl methylcellulose ntxiv. Hauv kev tsim kho tshwj xeeb, cov dej tuav cov nyhuv ntawm cov slurry tuaj yeem hloov kho los ntawm kev nce lossis txo tus nqi ntawm HPMC ntxiv. Kev tuav dej ntawm methyl cellulose ether nyob rau hauv qhov kub thiab txias yog ib qho tseem ceeb qhia kom paub qhov zoo ntawm hydroxypropyl methyl cellulose ether. Cov khoom lag luam zoo heev hydroxypropyl methylcellulose 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, high-zoo HPMC yuav tsum tau los txhim kho cov dej tuav ntawm slurry.
High-zoo hydroxypropyl methylcellulose (HPMC) muaj qhov zoo sib xws. Nws cov methoxy thiab hydroxypropoxy pawg sib npaug sib npaug ntawm cov saw cellulose molecular, uas tuaj yeem ua rau cov pa oxygen atoms ntawm hydroxyl thiab ether bonds. Lub peev xwm los koom nrog cov dej los tsim cov ntawv cog lus hydrogen hloov dej dawb rau hauv cov dej khi, yog li tswj tau cov dej evaporation los ntawm huab cua kub thiab ua tiav cov dej khaws cia. Cov dej yuav tsum tau ua kom muaj dej txhawm rau txhawm rau tsim cov khoom siv cementitious xws li cement thiab gypsum. Qhov tseeb ntawm HPMC tuaj yeem khaws cov dej noo hauv cov mortar rau lub sijhawm ntev txaus kom cov txheej txheem kev teeb tsa thiab tawv tawv tuaj yeem txuas ntxiv mus.
Tus nqi ntawm hydroxypropyl methylcellulose (HPMC) yuav tsum tau kom tau txais cov dej tuav kom txaus nyob ntawm:
Absorbency ntawm lub hauv paus txheej
Kev sib xyaw ntawm Mortar
Mortar txheej thickness
Mortar dej xav tau
Lub sijhawm teeb tsa ntawm cov khoom siv cementitious
Hydroxypropyl methylcellulose tuaj yeem ua tau zoo sib xws thiab muaj txiaj ntsig zoo hauv cov cement mortar thiab gypsum-raws li cov khoom, thiab qhwv tag nrho cov khoom siv, thiab tsim cov yeeb yaj kiab ntub dej, cov dej noo hauv lub hauv paus maj mam tso tawm rau lub sijhawm ntev, thiab nws yog sib xws nrog inorganic. Cov tshuaj tiv thaiv hydration ntawm cov khoom siv gelled ua kom lub zog ntawm daim ntawv cog lus thiab compressive zog ntawm cov khoom.
Yog li ntawd, nyob rau hauv high-temperature lub caij ntuj sov tsim, thiaj li yuav ua tau cov dej tuav nyhuv, nws yog tsim nyog los ntxiv high-zoo HPMC cov khoom nyob rau hauv txaus kom muaj nuj nqis raws li lub mis, txwv tsis pub, yuav muaj tsis txaus hydration, txo lub zog, tawg, hollowing. thiab shedding tshwm sim los ntawm over drying. teeb meem, tab sis kuj nce kev tsim kho nyuaj ntawm cov neeg ua haujlwm. Raws li qhov kub thiab txias, cov dej HPMC ntxiv tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Lub sij hawm xa tuaj: Plaub Hlis-10-2023