1. HPMC muab faib ua hom tam sim ntawd thiab hom tawg sai.
HPMC hom kev sib kis sai muaj tsab ntawv S ua tom qab. Glyoxal yuav tsum tau ntxiv thaum lub sijhawm tsim khoom.
HPMC hom ceev-dispersing tsis ntxiv cov ntawv, xws li "100000" txhais tau tias "100000 viscosity ceev-dispersing HPMC".
2. Nrog lossis tsis muaj S, cov yam ntxwv txawv
HPMC tawg sai sai hauv dej txias thiab ploj mus hauv dej. Cov kua tsis muaj viscosity lub sijhawm no vim tias HPMC tsuas yog tawg hauv dej thiab tsis yaj tiag tiag. Tom qab li ob feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov kua viscous pob tshab. Cov colloid tuab.
HPMC tam sim ntawd tuaj yeem tawg sai sai hauv dej kub ntawm ib puag ncig 70 ° C. Thaum qhov kub poob rau qee qhov kub, qhov viscosity maj mam tshwm sim kom txog thaum lub colloid viscous pob tshab tau tsim.
3. Muaj lossis tsis muaj S, lub hom phiaj txawv
HPMC tam sim ntawd tsuas yog siv tau rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum, xim thiab cov khoom siv ntxuav, tej zaum yuav muaj cov pawg thiab siv tsis tau.
HPMC uas tawg sai sai muaj ntau yam kev siv. Nws siv tau rau hmoov putty, mortar, kua nplaum, xim, thiab cov khoom siv ntxuav yam tsis muaj kev txwv.
txoj kev yaj
1. Muab dej kub raws li qhov koj xav tau, muab tso rau hauv lub thawv thiab ua kom sov txog li 80 ℃, tom qab ntawd maj mam ntxiv cov khoom no nrog kev sib xyaw qeeb qeeb. Thaum xub thawj, cov cellulose ntab rau ntawm qhov dej, tab sis maj mam tawg ua cov slurry sib xws. Txias cov tshuaj thaum sib xyaw.
2. Los yog ua kom 1/3 lossis 2/3 ntawm cov dej kub kub txog li 85°C, ntxiv cov cellulose kom tau cov dej kub, tom qab ntawd ntxiv cov dej txias seem, do tas li, thiab txias cov khoom sib tov.
3. Cellulose muaj qhov loj me me thiab nyob ua ib qho me me hauv cov hmoov sib xyaw ua ke. Nws yaj sai sai thaum raug dej kom ua rau nws muaj viscosity raws li qhov xav tau.
4. Maj mam ntxiv cov cellulose rau hauv qhov kub thiab txias, thiab do tas li kom txog thaum cov kua ntshiab.
Cov yam dab tsi cuam tshuam rau qhov khaws cia dej ntawm hydroxypropyl methylcellulose?
Qhov kev khaws cia dej ntawm hydroxypropyl methylcellulose HPMC cov khoom nws tus kheej feem ntau cuam tshuam los ntawm cov hauv qab no:
1. Kev sib npaug ntawm cellulose ether HPMC
Cov pab pawg HPMC methoxy thiab hydroxypropoxy uas muaj cov tshuaj sib xyaw ua ke tau faib sib npaug thiab muaj cov dej khaws cia siab.
2. Cellulose ether HPMC thermal gel kub
Qhov kub ntawm cov thermal conductive gel siab dua, qhov ceev ntawm kev khaws dej siab dua; ntawm qhov tod tes, qhov ceev ntawm kev khaws dej qis dua.
3. Viscosity ntawm cellulose ether HPMC
Thaum qhov viscosity ntawm HPMC nce ntxiv, qhov ceev ntawm kev khaws dej kuj nce ntxiv; thaum qhov viscosity nce mus txog qee qib, qhov nce ntawm qhov ceev ntawm kev khaws dej feem ntau maj mam.
Cellulose ether HPMC ntxiv tus nqi
Qhov ntau dua ntawm cov cellulose ether HPMC ntxiv, qhov siab dua ntawm kev khaws dej thiab qhov zoo dua ntawm cov dej khaws cia.
Hauv qhov ntau ntawm 0.25-0.6%, qhov ceev ntawm kev khaws dej nce ntxiv sai sai thaum qhov ntxiv ntau ntxiv; thaum qhov ntxiv ntau ntxiv, qhov sib txawv ntawm qhov nce ntawm qhov ceev ntawm kev khaws dej qeeb qeeb.
Lub sijhawm tshaj tawm: Lub Ob Hlis-06-2024