HydroxyPropyyl methylcellueculose (HPMC) yog ib feem ntxiv dav siv siv hauv kev tsim kho, chaw muag tshuaj, khoom noj thiab lwm thaj teb. Nws muaj cov thickening zoo, zaj duab xis-tsim, ruaj khov thiab emulsifying cov khoom. Txoj kev sib xyaw kom yog yog qhov tseem ceeb kom ntseeg tau nws cov kev ua tau zoo thiab cov khoom lag luam zoo.
1. Kev npaj
Khoom npaj: nco ntsoov siv HPMC hmoov zoo HPMC. Xaiv cov viscosity tsim nyog thiab specifications tshwj xeeb raws li cov ntawv thov tshwj xeeb.
Cov Khoom Siv Khoom Siv Khoom Siv: Cov Khoom Siv Ceev, Disperser lossis cov khoom siv tib yam yog siv. Cov cuab yeej yuav tsum yog huv thiab tsis muaj kuab paug.
Kev xaiv kev xaiv: HPMC feem ntau yog soluble hauv dej txias, tab sis cov kuab tshuaj organic lossis lwm yam xov xwm kuj tuaj yeem siv qee kis. Xaiv cov kuab tshuaj yog qhov tseem ceeb rau cov nyhuv sib xyaw thiab kev ua tau zoo ntawm cov khoom kawg.
2. Cov kauj ruam sib xyaw
Pretreatment: HPMC hmoov yuav tsum tau tshuaj xyuas kom tshem cov lumps thiab impurities los xyuas kom ntseeg tau cov kev sib cais ua ke.
Solvent ntxiv:
Cov Dej Txias Txhaws: Tso cov dej txias ntawm cov dej txias rau hauv cov tov khoom, pib plhaw, thiab maj mam ntxiv HPMC hmoov. Zam kev ntxiv ntau dhau ib zaug los tiv thaiv agglomeration. Txuas ntxiv nplawm kom txog thaum cov hmoov yog tag nrho cov dispersed.
Cov dej dej kub dispersion: Sib tov HPMC hmoov nrog qee qhov dej txias los ua kev ncua, thiab tom qab ntawd muab nws tso rau hauv dej kub kom sov rau 70-90 ° C. Do ntawm kev kub ceev kom yaj, tom qab ntawd ntxiv dej txias kom txias rau chav sov kom tau txais cov tshuaj kawg.
Kev rhuav tshem thiab thickening:
Thaum HPMC yog yaj hauv dej, ib qho kev ncua ntawv yog pib tsim. Raws li lub sijhawm stiringing nce thiab qhov ntsuas kub tsawg dua, qhov viscosity elastas nce kom txog thaum nws yog yaj tag. Lub sijhawm sib cais feem ntau yuav siv sijhawm 30 feeb txog ob peb teev, nyob ntawm cov viscosity thiab concentration ntawm HPMC.
Txhawm rau kom ua tiav kev sib cais, cov tshuaj yuav raug tso cai sawv ntsug rau ib lub sijhawm (xws li thaum hmo ntuj) kom ua tiav qhov kev pom zoo ntawm lub viscosity.
Hloov kho thiab kho kom haum:
Yog tias tsim nyog, cov khoom ntawm kev daws yuav tuaj yeem hloov kho los ntawm kev ntxiv lwm cov khoom xyaw (xws li cov tshuaj tiv thaiv, cov tuab, thiab lwm yam). Ntxiv ntxiv yuav tsum tau ua kom qeeb thiab ua kom muaj kev faib tawm cov kev faib tawm.
Pom kev thiab defoaming:
Txhawm rau tshem tawm undissolted hais thiab huab cua npuas, lub lim lossis degasser yuav siv tau. Pom kev tuaj yeem tshem tawm impurities, thaum degassing pab kom tau txais kev daws teeb meem ntau dua.
3. Kev ceev faj
Dej ua kom zoo thiab kub: Dej zoo muaj qhov cuam tshuam tseem ceeb ntawm HPMC. Nws raug nquahu kom siv dej muag lossis dej deionized kom tsis txhob muaj gelation los ntawm cov gelation los ntawm calcium thiab magnesium ions hauv dej nyuaj. Qhov kub dhau los lossis qis dhau qhov kub yuav cuam tshuam rau solubility thiab thickening nyhuv ntawm HPMC thiab yuav tsum tau tswj hwm hauv cov khoom tsim nyog.
Stirring ceev thiab lub sijhawm: dhau lub nrawm browring yuav qhia kom muaj huab cua loj thiab tsim npuas; Tsawg dhau qhov kev ua kom nruj yuav ua rau sib xyaw tsis sib xyaw. Lub stirring cov lus yuav tsum tau hloov kho raws li cov cuab yeej tshwj xeeb thiab cov mis.
Tiv thaiv agglomeration: Thaum ntxiv HPMC hmoov, nws yuav tsum tau ntxiv maj mam thiab tusyees, thiab khaws cia stirring los tiv thaiv kom muaj kev tsim ntawm agglomerates. Cov hmoov tuaj yeem ua tiav nrog qee cov dej txias lossis dej hiav txwv los tiv thaiv kev cog lus tuaj yeem siv.
Kev ntim khoom thiab siv: Kev daws HPMC yuav tsum muab cia rau hauv lub thawv kaw kom tsis txhob muaj lub teeb thiab kub. Thaum khaws cia ntev, lub xeev kev daws yuav tsum kuaj xyuas kom tsis txhob muaj nag lossis tsis zoo.
Sib tov hydroxypropyl methylcellose yuav tsum tau tswj cov txheej txheem nruj thiab cov txheej txheem kev ua haujlwm kom ntseeg tau tias nws cov khoom lag luam thiab cuam tshuam rau cov khoom kawg. Los ntawm kev xaiv cov cuab yeej raug, kev siv cov kev siv thiab cov kev daws teeb meem hpmc tuaj yeem npaj tau raws li cov chaw thov sib txawv. Hauv kev ua haujlwm tiag, kev hloov kho thiab kev xaiv yuav tsum tau ua raws li cov xwm txheej tshwj xeeb kom tau txais cov txiaj ntsig zoo tshaj plaws.
Lub Sijhawm Post: Feb-17-2025