1. HPMC muab faib ua hom instant thiab ceev dispersion hom
HPMC ceev dispersion hom yog suffixed nrog tsab ntawv S, thiab glyoxal yuav tsum tau ntxiv thaum lub sij hawm ntau lawm txheej txheem.
HPMC hom instant tsis ntxiv cov ntawv, xws li "100000" txhais tau tias "100000 viscosity ceev dispersion hom HPMC".
2. Nrog lossis tsis muaj S, cov yam ntxwv sib txawv
HPMC dispersed sai sai sai thaum nws ntsib dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua dej tsis muaj viscosity, vim tias HPMC tsuas yog tawg mus rau hauv dej yam tsis muaj kev sib cais tiag tiag. Tom qab li ob feeb, cov viscosity ntawm cov kua maj mam nce, tsim ib pob tshab viscous Thick colloid.
Instant HPMC tuaj yeem tawg sai sai hauv dej kub ntawm li 70 ° C. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity yuav tshwm sim maj mam 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 nplaum, cov xim pleev xim thiab cov khoom siv ntxuav, yuav muaj kev sib koom ua ke thiab siv tsis tau.
HPMC dispersed sai sai muaj ntau yam kev siv thiab tuaj yeem siv rau hauv cov hmoov putty, mortar, kua nplaum, xim, thiab cov khoom siv ntxhua khaub ncaws yam tsis muaj contraindications.
Txoj kev daws teeb meem
1. Siv cov dej kub uas xav tau, muab tso rau hauv ib lub thawv thiab ua kom kub siab tshaj 80 ° C, thiab maj mam ntxiv cov khoom no nyob rau hauv qeeb stirring. Cov cellulose ntab saum npoo dej thaum xub thawj, tab sis maj mam dispersed los ua ib qho slurry. Cov tshuaj tau txias thaum stirring.
2. Xwb, ua kom sov 1/3 lossis 2/3 ntawm cov dej kub kom siab tshaj 85 ° C, ntxiv cellulose kom tau cov dej kub slurry, ces ntxiv cov dej txias ntxiv, kom nplawm, thiab txias qhov sib tov.
3. Lub mesh ntawm cellulose kuj zoo, thiab nws tshwm sim raws li ib tug neeg me me nyob rau hauv tusyees stirred hmoov, thiab nws dissolves sai sai thaum nws tau raws li dej los tsim viscosity yuav tsum tau.
4. Maj mam thiab sib npaug ntxiv cellulose nyob rau hauv chav tsev kub, stirring tas li kom txog thaum lub pob tshab tov yog tsim.
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. Uniformity ntawm cellulose ether HPMC
Cov tshuaj tiv thaiv HPMC, methoxyl thiab hydroxypropoxyl sib npaug sib npaug, thiab cov dej tuav tau siab.
2. Thermal gelation kub ntawm cellulose ether HPMC
Qhov siab dua cov thermal gel, qhov siab dua cov dej tuav tus nqi; txwv tsis pub, qhov qis dua cov dej tuav tus nqi.
3. Cellulose ether HPMC viscosity
Thaum lub viscosity ntawm HPMC nce, cov dej tuav tus nqi kuj nce; Thaum cov viscosity nce mus txog ib theem, qhov nce hauv cov dej tuav tus nqi zoo li tiaj tus.
Ntxiv tus nqi ntawm cellulose ether HPMC
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% ntxiv, cov dej tuav tus nqi nce sai nrog qhov nce ntawm qhov sib ntxiv; thaum cov nyiaj ntxiv ntxiv, qhov kev nce ntawm cov dej tuav tus nqi qeeb.
Lub sij hawm xa tuaj: Nov-17-2022