1. Dab tsi yog lub ntsiab ntawv thov ntawm hydroxypropyl methylulose (HPMC)?
HydroxyPropyyl methylcellulose yog dav siv nyob rau hauv cov khoom siv tsim kho, cov khoom siv hluavtaws, cov khoom noj, cov ntawv ua liaj ua teb, tshuaj pleev ib ce, luam yeeb. HydroxyPropyyl methylcellulose tuaj yeem faib ua qib kev tsim kho, cov khoom noj thiab cov khoom noj khoom haus raws li nws daim ntawv thov. Tam sim no, feem ntau ntawm cov khoom lag luam yog cov qib kev tsim kho. Hauv cov hmoov tsim kho, ua kom muaj hmoov rau hauv cov nyiaj ntau, kwv yees li 90% yog siv rau cov hmoov ua kom muaj hmoov, thiab cov so yog siv rau cov txiv kab ntxwv xis thiab lo kua nplaum.
2. Muaj ob peb hom ntawm hydroxypropyl methylcellose (HPMC), thiab dab tsi yog qhov sib txawv hauv lawv cov kev siv?
HPMC tuaj yeem faib ua cov hom khoom lag luam tseem ceeb thiab kev kub. Cov khoom lag luam tam sim ntawd nrawm nrawm thaum lawv 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 2 feeb, lub viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab viscous colloid. Cov khoom kub kub yaj, thaum ntsib nrog dej txias, tuaj yeem tawg nrawm nrawm hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias rau qhov kub thiab txias, qhov dav dav yuav maj mam tshwm sim kom txog thaum nws tsim lub pob tshab viscous colloid. Qhov kub-melt hom tsuas yog siv rau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib. Hauv cov kua nplaum kua thiab pleev xim, yuav muaj pab pawg tshwm sim thiab tsis tuaj yeem siv. Cov hom tseem ceeb muaj cov kev siv dav dav. Nws tuaj yeem siv tau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib, nrog rau kua nplaum ua kua thiab pleev xim, tsis muaj cov contraindications.
3. Dab tsi yog cov kev sib cais ntawm hydroxypropyl methylcelulose (HPMC)?
Cov Dej Dej Kub Kawg Ob txoj hauv kev tau piav raws li nram qab no:
1) Muab cov dej kub uas yuav tsum muaj dej kub rau hauv lub thawv thiab cua sov nws txog 70 ° C. Lub HydroxyPropyyl nrho methylcellulose tau maj mam ntxiv nyob rau hauv qeeb stirring, thiab tom qab ntawd maj mam tsim ib tug slurry, uas tau txias nyob rau hauv nplawm.
2) Ntxiv 1/3 lossis 2/3 ntawm qhov yuav tsum tau dej rau hauv lub thawv, thiab ua kom sov rau ntawm lub sijhawm 1), Disperse HPMC los npaj dej kub slurry; Tom qab ntawd ntxiv qhov seem ntawm dej txias rau cov dej kub slurry, cov sib tov tau txias tom qab nplawm.
Hmoov sib xyaw txujci: sib tov HPMC hmoov nrog cov tshuaj muaj ntau, thiab tom qab ntawd HPMC tuaj yeem yaj, thiab tom qab ntawd HPMC tuaj yeem yaj tag nrho cov hmoov me me, yuav yaj tam sim ntawd thaum muaj kev sib cuag nrog dej. --Puterty hmoov thiab coll tuam ntxhab yog siv hom no. [Hydroxypropyl methylcellose (HPMC) yog siv los ua cov tuab thiab dej rov ua kom huv.]
4. Yuav ua li cas thiaj li txiav txim siab qhov zoo ntawm hydroxyprropal methylcellose (HPMC) tsuas yog thiab intuitively?
(1) whiteness: tsis tuaj yeem tiv thaiv kom HPMC yooj yim siv, thiab yog cov neeg sawv cev kom huv, nws yuav cuam tshuam nws cov kev zoo. Txawm li cas los xij, feem ntau ntawm cov khoom lag luam zoo muaj zoo dawb.
(2) Fineness: lub txiaj ntsig ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, 120 mesh yog tsawg dua, thiab feem ntau HPMC ua rau hauv Hebei yog 80 mesh. Tus finer lub fineness, feem ntau hais lus, zoo dua.
(3) Kev Hloov Chaw) Tso rau hauv HydroxyPropyl methylcellose (HPMC) rau hauv dej los ua ib qho kev hloov pauv colloid, thiab tshuaj xyuas nws cov kev hloov pauv. Qhov siab dua qhov kev hloov pauv, zoo dua, qhia tias muaj tsawg insoluble hauv nws. Lub permeability ntawm cov neeg ntsug feem ntau zoo, thiab nws tsis txhais tau tias yog qhov zoo dua li tias ntawm kab rov tav reactors, thiab khoom lag luam zoo yog txiav txim siab los ntawm ntau yam.
(4) Qhov Loj Tshaj Plaws: Qhov loj dua qhov sib tsoo tshwj xeeb, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb yog qhov loj, feem ntau vim tias cov ntsiab lus ntawm hydroxypropyl group hauv nws yog siab, thiab cov ntsiab lus ntawm hydroxyproproutyl yog qhov siab, cov dej khaws cia zoo dua.
5. Dab tsi yog qhov nyiaj ntawm hydroxypropy kasthylcellose (HPMC) hauv cov hmoov putty?
Tus nqi HPMC siv hauv cov ntawv thov kev sib txawv raws li cov huab cua, qhov zoo ntawm cov txiv ntoo tshauv, cov tshuaj muaj hmoov thiab "zoo uas yuav tsum tau los ntawm cov neeg siv khoom". Feem ntau hais lus, nruab nrab ntawm 4 kg thiab 5 kg. Piv txwv li: Feem ntau ntawm cov hmoov putty hauv Beijing yog 5 kg; Feem ntau ntawm cov hmoov putty hauv Guizhou yog 5 kg nyob rau lub caij ntuj sov thiab 4.5 kg thaum lub caij ntuj no; Tus nqi ntawm putty hmoov nyob rau hauv Yunnan yog qhov me me, feem ntau 3 kg mus rau 4 kg, thiab lwm yam.
6. Dab tsi yog qhov tsim nyog viscosity ntawm hydroxypropyl methylulose (HPMC)?
Putty hmoov feem ntau txaus rau 100,000 yuan, thiab cov cai rau tshuaj khib tau ntau dua, thiab Yuan yuav tsum tau siv yooj yim. Ntxiv mus, cov haujlwm tseem ceeb tshaj plaws ntawm HPMC yog dej tuav, ua raws li thickening. Nyob rau hauv cov hmoov putty, tsuav li lub taub dej ceev yog qhov zoo thiab lub viscosity yog tsawg (70,000-80,000), nws tseem ua tau. Ntawm chav kawm, qib siab dua viscosity, zoo dua cov txheeb ze cov dej rov qab khaws cia. Thaum lub viscosity tshaj 100,000, lub viscosity yuav cuam tshuam rau cov dej tuav tseg. Tsis ntau ntxiv lawm.
7. Dab tsi yog cov ntsuas ntsuas tseem ceeb ntawm hydroxypropylropeny (HPMC)?
Hydroxypropyl cov ntsiab lus thiab viscosity, feem ntau cov neeg siv tau txhawj xeeb txog ob yam ntsuas no. Cov uas muaj cov ntsiab lus hydroxyproprots feem ntau muaj cov dej ua kom zoo dua. Ib qho nrog cov viscosity siab muaj cov dej siab zoo dua, tsis yog), thiab ib qho uas muaj viscosity siab yog siv tau zoo dua hauv cov xis.
8. Dab tsi yog cov ntaub ntawv nyoos ntawm hydroxypropyl methylcelulose (HPMC)?
Cov ntaub ntawv raw loj ntawm hydroxypropylulose (HPMC): Cov zaub mov ua kom zoo nkauj, cov tshuaj txhuam me, acid, isopropanol, thiab lwm yam.
9. Dab tsi yog qhov ua haujlwm tseem ceeb ntawm daim ntawv thov
Hauv cov hmoov putty, HPMC ua si peb lub luag haujlwm ntawm thickening, dej tuav thiab tsim kho. Thickening: cellulose tuaj yeem ua tuab rau ncua thiab ua kom cov tshuaj daws teeb meem nce thiab nqis, thiab tiv taus sagging. Dej khaws cia: Ua cov hmoov ua kom qhuav maj mam, thiab pab cov ntug dej tshauv kom muaj kev cuam tshuam hauv kev ua dej. Kev tsim kho: Cellulose muaj cov nyhuv muaj lubricating nyhuv, uas tuaj yeem ua rau cov hmoov puty muaj kev tsim kho zoo. HPMC tsis koom nrog kev siv tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm pab pawg. Ntxiv cov dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog tshuaj lom neeg cov tshuaj tiv thaiv, vim tias cov tshuaj tshiab tau tsim. Yog tias koj tshem tawm cov hmoov putty ntawm phab ntsa los ntawm phab ntsa, thiab siv nws dua, nws yuav tsis ua haujlwm vim tias cov khoom siv hluav taws xob (calcium carbonate) tau tsim.) Ib yam nkaus. Lub ntsiab ntawm cov hmoov tshauv calcium hmoov yog: sib xyaw ntawm Ca (OHE ON hauv qhov kev txiav txim siab ntawm CO2, CA (OH (OH) 2 + CA (H2O) nws tus kheej.
10. HPMC yog cov tsis-ionic cellulose ether, yog li dab tsi tsis-ionic?
Nyob rau hauv Layman cov lus, tsis muaj i ions cov tshuaj uas tsis ionize hauv dej. Ionization hais txog cov txheej txheem uas ib qho electrolyte rau hauv kev them nyiaj rau hauv kev them nyiaj rau hauv cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (nacl), ntsev peb noj txhua hnub, yaj nyob rau hauv dej thiab chloride ions (cl) uas yog tsis zoo. Uas yog hais, thaum HPMC tau muab tso rau hauv dej, nws yuav tsis cais tawm rau hauv cov pej xeem, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.
Lub Sijhawm Post: Apr-03-2023