HydroxyPropyyl Metylcellulose (HPMC) yog cov tshuaj yeeb tshuaj siv hauv cov tshuaj, khoom noj, kev lag luam kom zoo nkauj thiab kev tsim kho. Nws yog mas ua los ntawm methylcellulose thiab hydroxyproylrops los ntawm kev siv tshuaj, thiab muaj cov yeeb yaj kiab, zaj duab xis thiab lubrication.
Cov yam ntxwv yooj yim ntawm HPMC
Cov qauv tshuaj: Tus qauv tshuaj ntawm HPMC muaj ob qho chaw hloov, methyl thiab hydroxypropyl, uas txuas nrog lub cellulops molecule los ntawm herherification tiv thaiv. Lub xub ntiag ntawm methyl thiab hydroxypropyl pawg ua rau nws muaj dej zoo solubility thiab kev ua si nto.
Solubility: HPMC tuaj yeem yaj sai nyob rau hauv dej txias los tsim ib pob tshab lossis me ntsis turbid daws, tab sis nws yog insoluble hauv dej kub. Cov cuab yeej no ua rau nws ua kom zoo rau ntau cov ntawv thov, xws li raws li tus neeg sawv cev tawm-tso tawm thiab cov tuab tuab hauv kev npaj tshuaj.
Viscosity: viscosity ntawm HPMC kev daws teeb meem cuam tshuam los ntawm qhov kub thiab kub thiab qib hloov chaw. HPMC cov khoom lag luam nrog cov qib sib txawv ntawm kev hloov pauv tuaj yeem muab cov kuab tshuaj sib txawv ntawm ntau qhov kub kom tau raws li cov ntawv thov sib txawv.
Qhov sib txawv ntawm cov dawb HPMC thiab zoo tib yam HPMC
Hauv qee cov kev siv, tshwj xeeb hauv cov kws tshuaj thiab kev ua zaub mov noj, cov ntsiab lus tsis huv thiab kev tsis sib haum xeeb ntawm cov khoom lag luam yog qhov tseem ceeb heev. Sulfur (s) yuav suav tias yog ib qho impurity nyob rau qee kis, yog li qee cov ntawv thov kev xaiv xav tau kev siv HPMC S-DAWB HPMC.
Ntau dua cov kev coj dawb huv: S-Free HPMC undergoes ntau dua cov kev ua kom nruj dua tshiab thaum lub sijhawm tsim khoom los tshem cov sulphur thiab nws cov tebchaw. Qhov kev txhawb nqa HPM no yog qhov tsim nyog rau cov ntawv thov uas nkag siab txog impurities, xws li cov tshuaj pleev ib ce siab thiab cov tshuaj pleev ib ce siab.
Muaj zog ruaj khov: vim tias cov neeg Sulphur tuaj yeem koom nrog Redebñ Redsations nyob rau hauv qee qhov xwm txheej, uas ua rau kev hloov pauv lossis kev ua haujlwm hauv cov khoom lag luam. S-free HPMC tuaj yeem tswj hwm qhov ruaj khov ntawm nws lub cev thiab tshuaj lom neeg nyob rau hauv ib qho kev mob dav dav thiab txuas lub txee lub neej ntawm cov khoom.
Kev Nyab Xeeb Ntau Dua: Hauv cov zaub mov thiab cov tshuaj uas muag, cov leej txiv leej tub tuaj yeem ua rau muaj kev tsis haum xeeb lossis lwm tus neeg tsis haum tshuaj. Yog li ntawd, S-Free HPMC yog suav tias muaj kev nyab xeeb nyob hauv cov teb no thiab haum rau cov pab pawg dav dav ntawm cov neeg siv khoom.
Kev nthuav dav ntawm cov chaw thov: Vim nws cov ntawv thov kev nyab xeeb, tab sis kuj yog cov tshuaj tshwj xeeb, tab sis cov tshuaj tshwj xeeb, thiab cov tshuaj ntsuab zoo, thiab cov tshuaj ntsuab tshwj xeeb.
Qhov sib txawv hauv cov txheej txheem ntau lawm
Kev tsim cov s-free hpmc feem ntau koom nrog cov kauj ruam hauv qab no:
Xaiv cov khoom siv Raw: Xaiv cov khoom siv raw high-cellulose raw cov ntaub ntawv kom ntseeg tau tias cov ntaub ntawv raw tsis muaj lossis me nyuam roj sulfur.
Refining Txheej Txheem: Thaum lub Ehereification cov tshuaj tiv thaiv, Sulfur-catalysts thiab cov ntxiv yog siv kom tsis txhob pom cov lus ntawm cov leej faj.
Kev Kho Mob Tom Qab: Thaum ntxuav cov txheej txheem ntawm cov khoom lag luam, cov khoom siv ntshiab thiab cov khoom siv tshuaj ntsuab siv tau los txo cov khoom noj los ntawm cov khoom noj.
S-dawb hydroxypropyl methylcellose (HPMC) zoo ib yam li kev ua kom zoo nkauj, solubility thiab viscosity, nws muaj qhov tseem ceeb hauv qee qhov kev thov high-kawg. Los ntawm ntau txoj kev nruj ntau cov txheej txheem thiab kev tswj hwm zoo, S-HPMs dawb muab kev xaiv tau txhim khu kev qha rau cov ntawv thov uas xav tau cov kev ua kom siab thiab qis dua.
Lub Sijhawm Post: Feb-17-2025