1. HPMC muab faib ua hom instant thiab ceev dispersing hom.
HPMC ceev dispersion hom muaj tsab ntawv S raws li cov lus tom qab. Glyoxal yuav tsum tau ntxiv thaum lub sijhawm tsim khoom.
HPMC ceev-dispersing hom tsis ntxiv ib tsab ntawv, xws li "100000" txhais tau tias "100000 viscosity fast-dispersing HPMC".
2. Nrog lossis tsis muaj S, cov yam ntxwv sib txawv
HPMC dispersing sai sai disperses nyob rau hauv dej txias thiab disappears nyob rau hauv dej. Cov kua tsis muaj viscosity nyob rau lub sijhawm no vim tias HPMC tsuas yog tawg mus rau hauv dej thiab tsis yaj tiag tiag. Tom qab li ob feeb, lub viscosity ntawm cov kua maj mam nce, tsim ib pob tshab viscous kua. tuab colloid.
Instant HPMC tuaj yeem tawg sai sai hauv dej kub ntawm thaj tsam 70 ° C. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity maj mam tshwm kom txog thaum lub pob tshab viscous colloid tsim.
3. Nrog lossis tsis muaj S, lub hom phiaj sib txawv
Instant HPMC tsuas yog siv tau rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum, cov xim thiab cov khoom siv tu, cov pob zeb yuav tshwm sim thiab siv tsis tau.
Kev tawg sai sai HPMC muaj ntau yam kev siv. Nws tuaj yeem siv rau putty hmoov, mortar, kua kua nplaum, xim, thiab cov khoom siv tu yam tsis muaj contraindications.
txoj kev tawg
1. Siv cov dej kub uas yuav tsum tau, muab tso rau hauv ib lub thawv thiab cua sov kom siab tshaj 80 ℃, ces maj mam ntxiv cov khoom no nrog qeeb stirring. Cov cellulose ntab rau saum npoo dej thaum xub thawj, tab sis maj mam disperses los ua ib qho slurry. Txias cov tshuaj thaum stirring.
2. Los yog cua sov 1/3 los yog 2/3 ntawm cov dej kub kom siab tshaj 85 ° C, ntxiv cellulose kom tau ib tug dej kub slurry, ces ntxiv cov seem ntawm cov dej txias, do tsis tu ncua, thiab txias lub resulting sib tov.
3. Cellulose muaj ib qho mesh zoo mesh thiab tshwm sim raws li ib qho me me hauv cov hmoov sib tov sib xyaw. Nws yaj sai sai thaum raug dej los tsim cov viscosity xav tau.
4. Ntxiv cellulose maj mam thiab sib npaug ntawm chav tsev kub, nplawm tsis tu ncua kom txog thaum cov ntaub ntawv ntshiab.
Dab tsi cuam tshuam rau kev tuav dej ntawm hydroxypropyl methylcellulose?
Kev tuav dej ntawm hydroxypropyl methylcellulose HPMC cov khoom nws tus kheej feem ntau cuam tshuam los ntawm cov hauv qab no:
1. Homogeneity ntawm cellulose ether HPMC
Cov pawg HPMC methoxy thiab hydroxypropoxy reacted sib npaug sib npaug sib npaug thiab muaj kev tuav dej siab.
2. Cellulose ether HPMC thermal gel kub
Qhov siab dua qhov kub ntawm cov thermal conductive gel, qhov siab dua cov dej tuav tus nqi; conversely, qhov qis dua cov dej tuav tus nqi.
3. Viscosity ntawm cellulose ether HPMC
Thaum lub viscosity ntawm HPMC nce, cov dej tuav tus nqi kuj nce; Thaum lub viscosity nce mus txog ib theem, qhov nce hauv dej tuav tus nqi yuav maj mam.
Cellulose ether HPMC tus nqi ntxiv
Qhov ntau dua ntawm cellulose ether HPMC ntxiv, qhov siab dua cov dej tuav thiab cov dej tuav tau zoo dua.
Nyob rau hauv qhov ntau ntawm 0.25-0.6%, cov dej tuav tus nqi nce sai heev raws li cov nyiaj ntxiv nce ntxiv; Thaum cov nyiaj ntxiv ntxiv ntxiv, qhov kev nce ntawm cov dej tuav tus nqi qeeb.
Post lub sij hawm: Feb-06-2024