1. HPMC tau 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 nrawm dua hom hpmc ".
2. Nrog lossis tsis muaj s, tus yam ntxwv sib txawv
Rapidly dispersed HPMC disperses quickly when it encounters cold water and disappears into the water. 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. Nrog 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 tau HPMC muaj ntau cov ntawv thov thiab tuaj yeem siv rau hauv hmoov putty, tshuaj khib, pleev xim, thiab cov khoom ntxuav, thiab cov khoom ntxuav tsis muaj contrainment.
Dissolving txoj kev
1. Coj cov dej kub uas yuav tsum tau ntawm dej kub, muab tso rau hauv lub thawv thiab tshav kub nws 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.
2. Lwm qhov, tshav kub 1/3 lossis 2/3 ntawm cov dej kub kom tau txais dej txias dua 85 °
3. Lub ntxig ntawm cellulose yog qhov zoo li qub, thiab nws muaj raws li cov hmoov me me hauv lub puabyEly stirred hmoov, thiab nws yaj sai sai thaum nws ntsib dej kom tsim viscosity.
4. Maj mam thiab tusyees ntxiv cellulose ntawm chav tsev kub, nplawm tsis tu ncua kom txog rau thaum muaj kev daws teeb meem.
Yam dab tsi cuam tshuam rau cov dej tuav ntawm hydroxypropyyl methylulose?
Cov dej tuav tseg ntawm hydroxypropyl methylcellose HPMC khoom nws tus kheej feem ntau cuam tshuam los ntawm cov hauv qab no:
1. Kev sib xyaw ntawm cellulose ether HPMC
Tusyees cuam tshuam HPMC, methoxyl thiab hydroxyproppoxyl yog tusyees faib tawm, thiab cov dej khaws cia siab yog siab.
Qhov siab dua cov thermal gel kub, ntau dua cov dej rov qab tswj; Txwv tsis pub, qis dua cov dej khaws cia.
3. Cellulose ether HPMC viscosity
Thaum lub viscos ntawm HPMC nce, cov dej tswj kav ntxiv kuj nce ntxiv; when the viscosity reaches a certain level, the increase in water retention rate tends to be flat.
Ntxiv qhov nyiaj ntawm Cellulose ether HPMC
Qhov ntau dua tus nqi ntawm cellulose ether HPMP ntxiv, ntau dua cov dej khaws cia thiab qhov zoo dua cov txiaj ntsig khaws cia.
Nyob rau hauv cov thaj tsam ntawm 0.25-0.6% ntxiv, dej khaws nyiaj khaws cia nce nrawm nrog kev nce ntxiv; Thaum qhov kev ntxiv ntxiv nce ntxiv, nce ntxiv ntawm cov dej khaws cov nqi rov qab qeeb qeeb.
Lub Sijhawm Post: Feb-21-2025