1.HPMCtau muab faib ua cov hom tseem ceeb thiab nrawm dua hom.
HPMC nrawm dispersion hom yog ua tiav nrog tsab ntawv s, thiab glyoxal yuav tsum tau ntxiv thaum lub sijhawm ua khoom.
HPMC tam sim no tsis ntxiv ib tsab ntawv, xws li "100000" txhais tau tias "100000 viscosity.
2. Nrog lossis tsis muaj s, tus yam ntxwv sib txawv
Sai dispersing HPMC disperses sai sai thaum nws ntsib dej txias thiab ploj mus rau hauv dej. Nyob rau lub sijhawm no, cov kua tsis muaj viscosity, vim HPMC tsuas yog dispersed hauv dej yam tsis muaj kev sib cais tiag. Tom qab txog ob feeb, lub viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab viscous tuab tuab.
Tam sim no HPMC tau sai sai rau hauv dej kub txog li 70 ° C. Thaum qhov kub thiab txias rau qhov kub thiab txias, qhov chaw nres tsheb yuav tshwm sim kom txog thaum muaj kev sib tw ua kom khov khov yog tsim.
3.Ywith lossis tsis muaj s, lub hom phiaj sib txawv
Tam sim no HPMC tsuas yog siv tau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib. Hauv cov kua nplaum ua kua, xim thiab cov khoom ntxhua khaub ncaws, yuav tau muaj cov xwm txheej zoo thiab tsis tuaj yeem siv.
Sai sai dispersedHPMCMuaj ntau cov ntawv thov thiab tuaj yeem siv rau hauv cov hmoov ua kom muaj hmoov, tshuaj khib, kua nplaum ua kua, thiab ntxuav cov khoom lag luam yam tsis muaj contrainment.
4.Dissolting txoj kev
4-1. Noj cov dej kub uas yuav tsum tau ntawm cov dej kub, muab tso rau hauv ib lub thawv thiab ua kom sov rau siab dua 80 ° C, thiab maj mam ntxiv cov khoom no nyob rau qeeb qeeb. Lub cellulose floats nyob rau hauv dej saum npoo thaum xub thawj, tab sis yog maj dispersed los ua ib tug uniform slurry. Cov kev daws teeb meem tau txias thaum ua kom nplawm.
4-2. Hloov chaw, kub 1/3/3 lossis 2/3 ntawm cov dej kub kom tau ntau dua ntawm dej txias, tom qab ntawd stirring, thiab txias lub txiaj ntsig.
4-3. Lub ntxig ntawm cellulose yog qhov zoo li qub, thiab nws muaj raws li cov hmoov me me hauv lub puab tusyees ua kom sai thaum nws ntsib dej kom tau viscosity.
4-4. Maj mam thiab tusyees ntxiv cellulose ntawm chav tsev kub, thiab ua kom muaj kev daws teeb meem kom txog thaum muaj kev daws teeb meem.
5.Whatures qhov cuam tshuam rau cov dej khaws cia ntawm hydroxypropyl methyl cellulose?
5-1. Cellulose ether HPMC homogeneity
Tusyees cuam tshuam HPMC, methoxyl thiab hydroxyproppoxyl yog tusyees faib tawm, thiab cov dej khaws cia siab yog siab.
5-2. Cellulose ether HPMC thermal gel kub
Qhov siab dua cov thermal gel kub, ntau dua cov dej rov qab tswj; Txwv tsis pub, qis dua cov dej khaws cia.
5-3. Cellulose ether hpmc viscosity
Thaum lub viscos ntawm HPMC nce, cov dej tswj kav ntxiv kuj nce ntxiv; Thaum lub viscosity mus txog ib theem, kev nce hauv dej khaws cia hauv tus nqi khaws cia kom maj mam ua.
6.Ddition nyiaj ntawm cellulose ether HPMC
Qhov ntau dua tus nqi ntawm cellulose etherHPMCntxiv, ntau dua cov dej rov qab tswj hwm thiab qhov zoo dua cov txiaj ntsig khaws cia.
Nyob rau hauv thaj tsam ntawm 0.25-0.6%, dej tswj kav dej nce nrawm nrog kev nce ntxiv; Thaum qhov kev ntxiv ntxiv nce ntxiv, nce ntxiv ntawm cov dej khaws cia kom qeeb.
Lub sijhawm Post: Plaub-26-2024