Cov viscosity ntau yam ntawm HPMC hauv kev tsim kho
1 Kev Taw Qhia
Hydroxypropyl Methylcellulose (HPMC) yog ib qho tseem ceeb hauv tsev cov khoom siv ntxiv thiab yog dav siv nyob rau hauv ntau yam khoom nyob rau hauv lub tsev cov ntaub ntawv kev lag luam, xws li qhuav-mix mortar, putty hmoov, pobzeb nplaum, thiab lwm yam HPMC muaj ntau yam functions xws li thickening, dej tuav, thiab txhim kho kev tsim kho kev ua haujlwm. Nws qhov kev ua tau zoo nyob ntawm qhov loj ntawm nws cov viscosity. Tsab ntawv xov xwm no yuav tshawb txog qhov nthuav dav ntawm cov viscosity ntau yam ntawm HPMC hauv cov ntawv thov kev tsim kho sib txawv thiab lawv qhov cuam tshuam rau kev tsim kho.
2. Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog cov dej tsis-ionic-soluble cellulose ether tau los ntawm kev hloov tshuaj lom neeg ntawm cov cellulose ntuj. Nws muaj cov yam ntxwv tseem ceeb hauv qab no:
Thickening: HPMC tuaj yeem ua kom cov viscosity ntawm cov khoom siv hauv tsev thiab muab kev ua haujlwm zoo.
Kev tuav dej: Nws tuaj yeem txo cov evaporation ntawm cov dej thiab txhim kho cov tshuaj tiv thaiv dej ntawm cov cement thiab gypsum.
Lubricity: Ua kom cov khoom smoother thaum lub sij hawm tsim kho thiab yooj yim rau kev thov.
Zaj duab xis-forming zog: Cov zaj duab xis tsim muaj zoo toughness thiab yooj thiab tuaj yeem txhim kho cov khoom nto ntawm cov khoom.
3. Kev siv HPMC hauv cov khoom siv hauv tsev
Pobzeb nplaum: Lub luag haujlwm tseem ceeb ntawm HPMC hauv pobzeb nplaum yog txhawm rau txhim kho kev sib raug zoo thiab lub sijhawm qhib. Qhov viscosity ntau yog feem ntau ntawm 20,000 thiab 60,000 mPa·s muab cov khoom sib txuas zoo thiab lub sijhawm qhib. High viscosity HPMC pab ua kom lub zog sib txuas ntawm cov nplais nplaum thiab txo qis.
Putty hmoov: Ntawm cov hmoov putty, HPMC tsuas yog ua lub luag haujlwm ntawm kev tuav dej, lubrication thiab txhim kho kev ua haujlwm. Lub viscosity feem ntau yog nyob nruab nrab ntawm 40,000 thiab 100,000 mPa·s. Cov viscosity siab dua pab khaws cov dej noo hauv cov hmoov putty, txhim kho nws lub sijhawm ua haujlwm thiab qhov smoothness.
Qhuav mix mortar: HPMC yog siv rau hauv cov khoom sib xyaw qhuav los txhim kho adhesion thiab dej tuav cov khoom. Cov viscosity feem ntau yog nyob nruab nrab ntawm 15,000 thiab 75,000 mPa·s. Hauv cov xwm txheej sib txawv, xaiv HPMC nrog cov viscosity uas tsim nyog tuaj yeem ua kom zoo dua qhov kev sib koom ua ke thiab dej tuav ntawm mortar.
Self-leveling mortar: Yuav kom ua rau tus kheej-leveling mortar muaj fluidity zoo thiab nws tus kheej-leveling nyhuv, lub viscosity ntawm HPMC feem ntau yog nyob nruab nrab ntawm 20,000 thiab 60,000 mPa·s. Qhov viscosity ntau no ua kom ntseeg tau tias cov tshuaj khib nyiab muaj qhov dej txaus tsis cuam tshuam nws lub zog tom qab kho.
Waterproof txheej: Hauv cov dej tsis muaj dej, cov viscosity ntawm HPMC muaj kev cuam tshuam zoo rau cov txheej txheem txheej thiab cov khoom ua yeeb yaj kiab. HPMC nrog viscosity ntawm 10,000 thiab 50,000 mPa·s feem ntau yog siv los xyuas kom meej fluidity zoo thiab zaj duab xis-forming zog ntawm txheej.
4. Kev xaiv ntawm HPMC viscosity
Kev xaiv viscosity ntawm HPMC feem ntau yog nyob ntawm nws lub luag haujlwm hauv cov ntawv thov tshwj xeeb thiab kev tsim kho kev ua haujlwm. Feem ntau, qhov siab dua qhov viscosity ntawm HPMC, qhov zoo dua cov nyhuv thickening thiab tuav dej, tab sis siab dhau heev lawm yuav ua rau muaj teeb meem kev tsim kho. Yog li ntawd, xaiv HPMC nrog cov viscosity tsim nyog yog tus yuam sij kom ntseeg tau qhov kev tsim kho.
Cov nyhuv Thickening: HPMC nrog cov viscosity siab dua muaj cov nyhuv thickening thiab tsim nyog rau cov ntawv thov uas yuav tsum tau muaj kev sib zog, xws li cov nplaum nplaum thiab cov hmoov putty.
Kev tuav dej ua haujlwm: HPMC nrog cov viscosity siab dua yog qhov zoo tshaj plaws hauv kev tswj cov dej noo thiab tsim nyog rau cov ntaub ntawv uas yuav tsum tau khaws cov dej noo kom ntev, xws li cov tshuaj khib nyiab qhuav.
Kev ua haujlwm tau zoo: Txhawm rau txhim kho kev ua haujlwm ntawm cov khoom siv, qhov nruab nrab viscosity pab txhim kho qhov smoothness ntawm kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv tus kheej-leveling mortars.
5. Cov yam ntxwv cuam tshuam rau HPMC viscosity
Degree ntawm polymerization: Qhov siab dua qib ntawm polymerization ntawm HPMC, qhov viscosity ntau dua. 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 daws teeb meem: Qhov concentration ntawm HPMC hauv dej kuj tseem cuam tshuam rau nws cov viscosity. Feem ntau hais lus, qhov siab dua qhov concentration ntawm cov tshuaj, qhov viscosity ntau dua.
Kub: Kub muaj qhov cuam tshuam loj rau cov viscosity ntawm HPMC cov kev daws teeb meem. Feem ntau, cov viscosity ntawm HPMC cov kev daws teeb meem txo qis thaum qhov kub nce.
Raws li ib qho tseem ceeb additive nyob rau hauv lub tsev cov ntaub ntawv, HPMC lub viscosity heev cuam tshuam rau kev tsim kho kev ua tau zoo thiab siv cov nyhuv ntawm cov khoom kawg. Qhov viscosity ntau ntawm HPMC sib txawv ntawm daim ntawv thov, tab sis feem ntau yog nyob nruab nrab ntawm 10,000 thiab 100,000 mPa·s. Thaum xaiv HPMC tsim nyog, nws yuav tsum ua tib zoo xav txog qhov cuam tshuam ntawm viscosity ntawm cov khoom siv raws li kev thov tshwj xeeb thiab kev tsim kho, kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Lub sij hawm xa tuaj: Plaub Hlis-08-2024