Cov Hom Vas ntawm HPMC hauv kev siv kev siv
1 Taw qhia
HydroxyPropyyl Metylcellulose (HPMC) yog cov khoom siv hluav taws xob ntxiv thiab siv ntau lub zog, thiab lwm yam kev ua kom huv, thiab cov dej sib luag, thiab txhim kho kev tsim kho. Nws cov kev ua tau zoo nyob ntawm seb muaj ntau nyob rau ntawm nws viscosity. Kab lus no yuav tshawb txog cov kev nthuav dav ntawm HPMC hauv kev siv cov kev siv thiab kev cuam tshuam rau kev tsim kho kev ua haujlwm.
2. Cov yam ntxwv yooj yim ntawm HPMC
HPMC yog cov dej tsis-ionic-soluble cellulose ether tau los ntawm kev hloov tshuaj lom neeg ntawm ntuj cellulose. Nws muaj cov nta hauv qab no:
Thickening: HPMC tuaj yeem nce viscosity ntawm cov ntaub ntawv hauv tsev thiab muab cov haujlwm ua haujlwm zoo.
Dej khaws cia: Nws tuaj yeem txo cov cua ntawm dej thiab txhim kho cov dej ntws tawm ntawm cov cement thiab gypsum.
Lubricity: ua rau cov khoom lag luam smoother thaum kev tsim kho thiab yooj yim rau kev thov.
Zaj duab xis ua yeeb yam: cov yeeb yaj kiab tsim tau zoo heev thiab yoog raws thiab tuaj yeem txhim kho cov khoom ntiag tug ntawm cov khoom.
3. Daim ntawv thov ntawm HPMC hauv cov ntaub ntawv tsim tsev
Pobzeb nplaum: Lub luag haujlwm tseem ceeb ntawm HPMC hauv cov nplais nplaum yog txhawm rau txhim kho lub zog sib luag thiab qhib lub sijhawm. Cov viscosity ntau yog feem ntau yog ntawm 20,000 txog 60,000 tus neeg MpAngy muab cov khoom sib raug zoo thiab qhib lub sijhawm. Siab viscosity HPMC pab kom muaj lub zog sib txuam ntawm cov nplais nplaum thiab txo qis qis.
Putty Hmoov: Ntawm cov hmoov zaub, HPMC feem ntau ua lub luag haujlwm ntawm dej ceev ceev, lubrication thiab kev txhim kho ua haujlwm. Lub viscosity yog feem ntau ntawm 40,000 thiab 100,000 mpa a. Viscosity ntau dua pab khaws cov dej noo hauv cov hmoov putty, txhim kho nws lub sijhawm kev tsim kho lub sijhawm thiab nto smoothness.
Kev sib xyaw qhuav tshiab: HPMC yog siv rau hauv kev sib xyaw qhuav qhuav los txhim kho adhesion thiab dej khaws cia. Cov voscosity ranges yog nyob nruab nrab ntawm 15,000 thiab 75,000 mpa a. Hauv kev thov sib txawv ntawm cov xwm txheej HPMC nrog cov viscosity tsim nyog tuaj yeem ua kom zoo ua haujlwm thiab dej ceev ceev ntawm cug.
Kev ua tus kheej txoj kab sib nraus: kom ua rau tus kheej-tricking lawb tawm thiab cov nyhuv zoo, lub viscosity ntawm 20,000 thiab 60,000 mpa a. Qhov viscosity ntau yam uas cug txug tau muaj kua txaus tsis muaj kev cuam tshuam nws lub zog tom qab kho tau.
Waterproof txheej: hauv cov txheej txheej tiv thaiv dej, lub viscosity ntawm HPMC muaj ib qho kev cuam tshuam zoo ntawm cov khoom siv txheej thiab zaj duab xis-ua yeeb yam. HPMC nrog lub visccity ntawm 10,000 thiab 50,000 tus MPA puas yog siv los xyuas kom zoo nkauj thiab ua yeeb yaj kiab ua yeeb yam ntawm txheej.
4. Xaiv HPMC viscosity
Qhov viscosive xaiv 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, cov viscc ntau dua ntawm HPMC, ua kom zoo dua cov nyhuv tuab thiab ywg dej, tab sis ntau lub viscosity yuav ua rau teeb meem nyuaj. Yog li, xaiv HPMC nrog viscosity tsim nyog yog tus yuam sij los ua kom ua kom tiav cov txiaj ntsig kev tsim kho.
Thickening cov nyhuv: HPMC nrog cov txiaj ntsig ntau dua muaj zog ua kom muaj zog ua rau cov ntaub ntawv uas xav tau cov kua nplaum siab thiab cov hmoov ua kom tawv.
Dej ceev ceev kev ua tau zoo: HPMC nrog cov viscos ntau dua tau zoo heev hauv kev tswj hwm noo noo thiab yog qhov tsim nyog rau cov khoom siv noo noo ntev, xws li muab tshuaj khib kom qhuav.
Kev ua haujlwm: Txhawm rau txhim kho cov haujlwm ntawm cov khoom siv, tswj viscirecosity puas pab txhawm rau txhim kho qhov kev ua haujlwm smoothness, tshwj xeeb tshaj yog nyob rau hauv kev siv nyiaj yuav tus kheej.
5. Qhov ntau yam cuam tshuam HPMC viscosity
Qib ntawm polymerization: qib siab dua ntawm polymerization ntawm HPMC, cov viscosity ntau dua. Cov ntawv thov sib txawv xav tau kev xaiv HPMC nrog cov qib sib txawv ntawm polymerization kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Kev daws teeb meem: kev xav ntawm HPMC hauv dej yuav tseem cuam tshuam nws cov viscosity. Feem ntau hais lus, qhov siab dua ntawm kev daws teeb meem, ntau hom viscosity.
Qhov kub: Qhov kub thiab txias: Qhov cuam tshuam tseem ceeb rau kev viscosity ntawm HPMC cov kev daws teeb meem. Feem ntau, lub viscosity ntawm HPMC cov kev daws teeb meem txo qis raws li qhov kub nce ntxiv.
Raws li ib qho tseem ceeb uas tseem ceeb hauv tsev, HPMC cov viscosity zoo heev cuam tshuam rau kev tsim kho kev ua haujlwm thiab siv cov nyhuv ntawm cov khoom kawg. Lub viscosity ntau ntawm HPMC sib txawv ntawm cov ntawv thov, tab sis feem ntau yog ntawm 10,000 thiab 100,000 leej Mpa-as. Thaum xaiv HPMC haum, nws yog ib qho tsim nyog yuav tsum tau nkag siab txog qhov cuam tshuam ntawm cov khoom siv raws li cov ntaub ntawv kev tsim kho raws li kev thov kev thov thiab yog li ua kom tiav cov nyhuv zoo tshaj plaws.
Lub Sijhawm Post: Jul-08-2024