HydroxyPropyyl methylulose, feem ntau hu ua HPMC, muaj ntau yam, muaj ntau yam ntawm cov kev siv hauv kev lag luam nrog kev siv nrog kev tsim tawm, chaw muag tshuaj thiab khoom noj. HPMC yog lub cellulose ether, uas txhais tau tias nws yog muab los ntawm cellulose, lub ntuj polymer pom hauv cov nroj tsuag. Nws yog feem ntau siv cellulose ether vim nws cov khoom tshwj xeeb thiab cov nqi qis.
Dissolving HPMC tuaj yeem yog cov txheej txheem tsis yooj yim, tshwj xeeb tshaj yog thaum sim tau txais homogeneous thiab zoo sib xws. Hauv tsab xov xwm no, peb yuav tham txog qee yam tseem ceeb kom nco ntsoov thaum ua HPMC kom paub tseeb tias ua tiav kev sib dhos thiab xav tau.
1.Progrity ntawm HPMC
Lub purity hpmc tuaj yeem cuam tshuam nws solubility hauv dej thiab lwm yam kuab tshuaj. Yog li ntawd, nws yog ib qho tseem ceeb kom ntseeg tau tias HPMC siv yog qhov ua tau zoo thiab muaj kev nyab xeeb. HPMC tsis muaj paug nrog lwm cov tshuaj yuav tsis tawg kom zoo, ua rau muaj clumps lossis lumps nyob rau hauv kev daws. Qhov no tuaj yeem cuam tshuam tag nrho cov khoom lag luam uas muaj HPMC thiab tuaj yeem tsim teeb meem thaum lub sijhawm ua haujlwm.
2. HPMC hom tooj
HPMC muaj nyob rau hauv cov qhab nia sib txawv thiab qib viscosity, nrog rau txhua qib tsim rau ib daim ntawv thov. Cov qhab-nees ntawm HPMC siv yuav txiav txim siab ntawm HPMC yuav tsum tau thiab nws qhov kev sib cuam tshuam kub. Nyob ntawm cov qhab nia ntawm HPMC, kev sib cais kub thiab sijhawm yuav sib txawv. Yog li ntawd, nws yog ib qho tseem ceeb kom ua tib zoo nyeem thiab ua raws li cov chaw tsim khoom cov lus qhia txog HPMC siv thiab qhov ntsuas kub uas yuav tsum tau ua kom tau zoo.
3. Hnyav thiab Kub
Qhov kev xaiv ntawm cov kuab tshuaj siv thiab HPMC kev sib cais kub yog qhov tseem ceeb cuam tshuam rau cov txheej txheem sib cais. Dej yog cov kuab tshuaj uas feem ntau siv rau HPMC, thiab nws yog ib qho tseem ceeb kom ntseeg tau tias cov dej siv yog qhov ua tau zoo thiab tsis muaj kev tsis zoo. Cov dej tsis huv yuav muaj cov paug uas tuaj yeem cuam tshuam HPMC solubility thiab tag nrho cov khoom lag luam zoo.
Qhov kub ntawm HPMC yws kuj ua lub luag haujlwm tseem ceeb. HPMC yws tau zoo tshaj plaws hauv dej sov, nyiam dua ntawm 80-90 degrees Celsius. Txawm li cas los xij, nws yuav tsum raug sau tseg tias qhov kub yuav tsum tsis dhau hwv, txwv tsis pub HPMC yuav raug txwv thiab poob qis, ua rau muaj kev txo qis hauv viscosity thiab kev ua tsis zoo. Yog li ntawd, nws yog ib qho tseem ceeb kom ua tib zoo tswj qhov ntsuas kub ntawm cov kuab tshuaj kom ntseeg tau tias muaj kev ua tau zoo thiab kev ua tau zoo.
4. Sib tov thiab do
Kev sib xyaw ua ke thiab kev ntxhov siab yog qhov tseem ceeb kom ntseeg tau tias muaj txiaj ntsig zoo ntawm HPMC. Txhim kho kev txawj ntse thiab kev ntxhov siab yuav pab rhuav tshem HPMC hais thiab tsim homogeneous thiab zoo sib xws. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau siv txoj kev sib xyaw tsim nyog, xws li cov tshuaj sib xyaw high-shear gixers, uas pab kom muaj kev sib xyaw ua ke thiab cua hlob nyob hauv txoj kev daws teeb meem.
5. Kev Pom Kev HPMC
Cov concentration ntawm HPMC hauv kev daws teeb meem yog qhov tseem ceeb tshaj plaws kom xav txog thaum tus HPMC. Yog tias HPMC kev pom zoo dhau lawm, nws tuaj yeem ua rau pob txha caj dab lossis agglomerates los ua hauv kev daws teeb meem, ua rau nws nyuaj kom tau txais ib qho kev daws teeb meem. Ntawm qhov tod tes, yog hais tias kev xav tau tsawg dhau, nws yuav ua rau muaj kev daws teeb meem uas ?? dilute thiab muaj kev ua tsis zoo.
Hauv kev xaus
HPMC yog qhov ntau yam thiab ntau yam polymer nrog ntau cov kev siv hauv kev lag luam xws li kev tsim kho, chaw muag tshuaj thiab khoom noj. Kev rhuav tshem ntawm HPMC tuaj yeem yog cov txheej txheem tsis yooj yim, thiab nws yog ib qho tseem ceeb kom ua tib zoo saib xyuas qee yam xws li kev coj dawb huv, kev ntxhov siab, thiab kev ntxhov siab ntawm HPMC tov. Muaj kev vam meej xaus thiab xav tau cov txiaj ntsig tuaj yeem ua tiav los ntawm cov neeg tsim cov lus qhia thiab tswj hwm cov lus qhia no.
Lub sij hawm Post: Sep-22-2023