Kev ntub dej sib xyaw ua ke yog cov cement, zoo sib xyaw ua ke, admixature, dej thiab ntau yam kev txiav txim siab raws li kev ua tau zoo. Raws li ib qho kev faib ua feem, tom qab ntsuas thiab sib xyaw ua ke hauv lub chaw muag khoom sib xyaw, thiab muab tso rau hauv cov thawv ntub dej sib xyaw ua ke thiab siv nyob rau hauv lub sijhawm teev tseg.
Hydroxypropy yog siv los ua cov dej-tuav cov neeg sawv cev thiab cov neeg siv tshuaj cug ceg ua kom cov tshuaj khib. Siv los ua phau ntawv nyob hauv plastering plaster, nws txhim kho kev sib kis thiab ntev lub sijhawm ua haujlwm. Cov dej ua haujlwm khaws cia ntawm hydroxyprropylulose hpmc txwv tsis pub qeeb tom qab daim ntawv thov, thiab txhim kho lub zog tom qab ua kom tawv. Dej khaws cia yog ib qho kev ua tau tseem ceeb ntawm hydroxypropylulose hpmc, thiab nws kuj yog ib qho kev ua tau zoo ntawm cug tuam tsev manufacturers them sai sai rau. Yam cuam tshuam rau cov dej khaws cov dej khov ntawm cov tshuaj ntub-sib xyaw ua ke muaj xws li HPMC ntxiv, lub hom phiaj ntawm HPMC, lub visceness ntawm cov khoom, thiab qhov kub ntawm kev siv ib puag ncig.
Lub luag haujlwm tseem ceeb ntawm hydroxypropyl methylcellulose hpmc nyob rau hauv ntub-mix cug, lwm yam yog qhov sib xyaw ua ke cug, thiab qhov thib peb yog kev sib cuam tshuam nrog cov cement. Cov dej khaws cov nyhuv ntawm cellulose nyob ntawm cov txheej txheem dej, cov dej phib tawj, cov dej phib tawj, thiab lub sijhawm teeb tsa lub sijhawm teeb tsa. Qhov siab dua ntawm cov pob tshab ntawm hydroxypropylencellulose, qhov zoo dua cov dej khaws cia.
Qhov cuam tshuam rau cov dej khaws cia ntawm ntub dej-mix colle xws li cellulose viscosity, ntxiv cov nyiaj, particle zoo heev thiab siv kub. Qhov ntau dua viscosity ntawm cellulose ether, qhov zoo dua cov dej khaws cia. Viscosity yog qhov tseem ceeb parameter ntawm HPMC kev ua tau zoo. Rau tib cov khoom lag luam, cov viscosity tau ntsuas los ntawm cov qauv sib txawv yog qhov sib txawv heev, thiab qee tus txawm tau muaj ob npaug sib txawv. Yog li ntawd, thaum piv cov viscosity, nws yuav tsum tau nqa tawm ntawm tib txoj kev ntsuas, suav nrog qhov kub thiab lwm yam.
Feem ntau hais lus, ntau dua cov viscosity, qhov zoo dua cov dej khaws cov nyhuv khaws cia. Txawm li cas los xij, qhov ntau dua cov viscosity thiab ntau dua cov molecular hnyav ntawm HPMC, cov kev coj ua tsis zoo rau lub zog thiab kev tsim kho ntawm lub tshuaj khib. Qhov siab tshaj lub viscosity, qhov pom ntau ntxiv rau cov nyhuv tuab rau ntawm lub tshuaj khib, tab sis nws tsis ncaj ncaj ncaj. Qhov siab tshaj lub viscosity, ntau ntau ntau lub cug cug cug yuav ua, uas yog, thaum lub sijhawm tsim, nws yog manifested raws li straper thiab siab adhesion rau lub substrate. Tab sis nws tsis muaj txiaj ntsig zoo rau kev nce cov txheej txheem lub zog ntawm lub txiv ntoo qhuav nws tus kheej. Thaum kev tsim kho, kev ua haujlwm tsis zoo yog tsis pom tseeb. Ntawm qhov tsis sib xws, qee qhov hloov hydroxypropylulose nrog nruab nrab thiab qis viscosity muaj kev ua tau zoo heev hauv kev txhim kho lub zog ntawm cov tshuaj khib nyiab ntub dej.
Qhov ntau dua tus nqi ntawm cellulose ether HPMC ntxiv rau hauv kev sib xyaw ntub dej, qhov zoo dua cov dej kom zoo dua, thiab qib siab dua cov dej kom zoo dua. Fineness tseem yog ib qho kev ua tau tseem ceeb ntsuas ntawm hydroxypropyf methylculose.
Lub fineness ntawm hydroxypropyl methylcellulose kuj muaj qee yam cuam tshuam rau nws cov dej khaws cia. Feem ntau hais lus, rau hydroxypropyl methylcellose nrog tib viscosity tab sis sib txawv tus finess, tus finer qhov finer cov nyhuv retention nyhuv yog qhov zoo dua.
Hauv cov tshuaj ntub-sib xyaw ua ke, ntxiv rau Cellulose ETETHER HEEV, tab sis nws yog lub ntsiab ntxiv uas cuam tshuam rau kev ua haujlwm ntawm cug. Menroxypropy tsim nyog xaiv ntawm HydroxyPropyf methylpcellulose muaj cov cawv zoo rau kev txhim kho ntawm kev ua yeeb yam ntawm cov tshuaj nplaum ntub.
Lub sij hawm ncua: Mar-31-2023