Cov viscosity ntau ntawm HPMC hauv kev siv hauv kev tsim kho
1 Kev Taw Qhia
Hydroxypropyl Methylcellulose (HPMC) yog ib qho khoom siv tseem ceeb hauv kev tsim kho thiab siv dav hauv ntau yam khoom hauv kev lag luam khoom siv hauv kev tsim kho, xws li cov tshuaj sib tov qhuav, hmoov putty, nplaum pobzeb, thiab lwm yam. HPMC muaj ntau yam haujlwm xws li ua kom tuab, khaws dej, thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Nws qhov kev ua tau zoo nyob ntawm nws qhov viscosity. Tsab xov xwm no yuav tshawb nrhiav kom meej txog cov viscosity ntau ntawm HPMC hauv ntau daim ntawv thov kev tsim kho thiab lawv qhov cuam tshuam rau kev ua haujlwm ntawm kev tsim kho.
2. Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog cov cellulose ether uas tsis yog ionic uas yaj tau hauv dej los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj. Nws muaj cov yam ntxwv tseem ceeb hauv qab no:
Thickening: HPMC tuaj yeem ua rau kom cov khoom siv hauv tsev viscosity thiab muab kev ua haujlwm zoo.
Kev khaws dej: Nws tuaj yeem txo qhov evaporation ntawm dej thiab txhim kho cov tshuaj tiv thaiv hydration ntawm cement thiab gypsum.
Lubricity: Ua rau cov khoom du thaum lub sijhawm tsim kho thiab yooj yim dua rau kev thov.
Cov yam ntxwv ntawm zaj duab xis: Cov zaj duab xis uas tsim tau muaj qhov tawv thiab yooj ywm zoo thiab tuaj yeem txhim kho cov yam ntxwv ntawm cov khoom siv.
3. Daim ntawv thov ntawm HPMC hauv cov ntaub ntawv tsim kho
Cov nplaum rau pobzeb: Lub luag haujlwm tseem ceeb ntawm HPMC hauv cov nplaum rau pobzeb yog los txhim kho lub zog sib txuas thiab lub sijhawm qhib. Qhov ntau ntawm viscosity feem ntau yog ntawm 20,000 thiab 60,000 mPa · s los muab cov khoom sib txuas zoo thiab lub sijhawm qhib. HPMC viscosity siab pab ua kom lub zog sib txuas ntawm cov nplaum rau pobzeb nce ntxiv thiab txo qhov slippage.
Hmoov Putty: Ntawm cov hmoov putty, HPMC feem ntau ua lub luag haujlwm ntawm kev khaws dej, lubrication thiab txhim kho kev ua haujlwm. Qhov viscosity feem ntau yog ntawm 40,000 thiab 100,000 mPa · s. Viscosity siab dua pab khaws cov dej noo hauv cov hmoov putty, txhim kho nws lub sijhawm ua haujlwm tsim kho thiab qhov chaw du.
Cov tshuaj khib qhuav: HPMC siv rau hauv cov tshuaj khib qhuav los txhim kho kev nplaum thiab kev khaws dej. Cov viscosity feem ntau yog nyob nruab nrab ntawm 15,000 thiab 75,000 mPa·s. Hauv cov xwm txheej siv sib txawv, kev xaiv HPMC nrog viscosity tsim nyog tuaj yeem ua kom zoo dua qhov kev ua tau zoo ntawm kev sib txuas thiab kev khaws dej ntawm cov tshuaj khib.
Cov tshuaj khib nyiab uas nws tus kheej ua kom tiaj tus: Yuav kom cov tshuaj khib nyiab uas nws tus kheej ua kom tiaj tus muaj qhov dej ntws zoo thiab qhov dej ntws zoo, qhov viscosity ntawm HPMC feem ntau yog nruab nrab ntawm 20,000 thiab 60,000 mPa · s. Qhov viscosity ntau no ua kom cov tshuaj khib nyiab muaj qhov dej ntws txaus yam tsis cuam tshuam rau nws lub zog tom qab kho.
Txheej tiv dej: Hauv cov txheej tiv dej, qhov viscosity ntawm HPMC muaj feem cuam tshuam loj heev rau cov khoom txheej thiab cov khoom tsim zaj duab xis. HPMC nrog viscosity ntawm 10,000 thiab 50,000 mPa · s feem ntau yog siv los xyuas kom meej tias cov kua zoo thiab cov khoom tsim zaj duab xis ntawm cov txheej.
4. Kev xaiv ntawm HPMC viscosity
Qhov kev xaiv viscosity ntawm HPMC feem ntau nyob ntawm nws lub luag haujlwm hauv cov ntawv thov tshwj xeeb thiab cov kev cai ua haujlwm ntawm kev tsim kho. Feem ntau, qhov viscosity ntawm HPMC siab dua, qhov zoo dua qhov thickening effect thiab dej khaws cia, tab sis viscosity siab dhau yuav ua rau muaj teeb meem hauv kev tsim kho. Yog li ntawd, kev xaiv HPMC nrog viscosity tsim nyog yog qhov tseem ceeb rau kev ua kom ntseeg tau cov txiaj ntsig ntawm kev tsim kho.
Cov nyhuv ua kom tuab: HPMC nrog viscosity siab dua muaj cov nyhuv ua kom tuab dua thiab tsim nyog rau cov ntawv thov uas xav tau kev nplaum siab, xws li cov kua nplaum pobzeb thiab hmoov putty.
Kev ua tau zoo ntawm kev khaws dej: HPMC nrog viscosity siab dua zoo heev hauv kev tswj cov dej noo thiab tsim nyog rau cov ntaub ntawv uas xav tau khaws cov dej noo ntev, xws li cov tshuaj sib xyaw qhuav.
Kev Ua Haujlwm Tau: Txhawm rau txhim kho kev ua haujlwm tau ntawm cov khoom siv, qhov viscosity nruab nrab pab txhim kho qhov du ntawm kev ua haujlwm hauv kev tsim kho, tshwj xeeb tshaj yog hauv cov mortars uas tus kheej leveling.
5. Cov yam ntxwv cuam tshuam rau HPMC viscosity
Qib ntawm polymerization: Qhov siab dua ntawm qib polymerization ntawm HPMC, qhov ntau dua qhov viscosity. Cov ntawv thov sib txawv xav tau kev xaiv ntawm HPMC nrog ntau qib ntawm polymerization kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Kev sib xyaw ua ke ntawm cov tshuaj: Qhov sib xyaw ua ke ntawm HPMC hauv dej kuj tseem yuav cuam tshuam rau nws cov viscosity. Feem ntau hais lus, qhov siab dua qhov kev sib xyaw ua ke ntawm cov tshuaj, qhov ntau dua qhov viscosity.
Kub: Kub muaj feem cuam tshuam loj rau qhov viscosity ntawm HPMC cov kev daws teeb meem. Feem ntau, qhov viscosity ntawm HPMC cov kev daws teeb meem txo qis thaum qhov kub nce ntxiv.
Ua ib qho khoom siv tseem ceeb hauv cov ntaub ntawv tsim kho, HPMC's viscosity cuam tshuam loj heev rau kev ua haujlwm ntawm kev tsim kho thiab kev siv cov txiaj ntsig ntawm cov khoom kawg. Qhov ntau ntawm viscosity ntawm HPMC sib txawv ntawm cov ntawv thov, tab sis feem ntau yog ntawm 10,000 thiab 100,000 mPa · s. Thaum xaiv HPMC tsim nyog, nws yog ib qho tsim nyog los xav txog qhov cuam tshuam ntawm viscosity rau cov khoom siv raws li cov kev xav tau tshwj xeeb ntawm daim ntawv thov thiab cov xwm txheej tsim kho, kom ua tiav qhov zoo tshaj plaws siv cov txiaj ntsig.
Lub sijhawm tshaj tawm: Lub Xya Hli-08-2024