Dab tsi yog kev siv ntawm hydroxypropy kas methylcellose?
Siv dav hauv cov ntaub ntawv hauv tsev, cov khoom siv hluavtaws, cov tshuaj, khoom noj, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb. HPMC tuaj yeem faib ua: Qib Kev Tsim Kho Qib, Khoom Noj Qib Qib thiab Tshuaj Khoom raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom lag luam yog cov qib kev tsim kho. Nyob rau qib kev tsim kho, tus nqi ntawm cov hmoov putty yog qhov loj heev, txog 90% yog siv rau cov hmoov putty, thiab tus so yog siv rau cug cug thiab kua nplaum.
Dab tsi yog cov hau kev ntawm dissolving hydroxypropyl fiberyl fiber ntau?
1. Dej kub yaj txoj kev: Txij li HPMC tsis yaj hauv dej kub, HPMC tuaj yeem sib xyaw ua ke hauv dej kub, thiab tom qab ntawd ua rau txias thaum txias.
2. Hmoov sib xyaw txoj kev: sib tov HPMC hmoov nrog ntau cov hmoov txhuv nplej, thiab nws yuav yaj tag nrho, thiab nws yuav yaj tam sim ntawd thaum nws ua tau dej.
Yuav ua li cas xaiv cov viscosity ntawm hydroxypropyyl methylulose?
Xaiv cov vencosities txawv raws li cov ntawv thov sib txawv, koj tuaj yeem xaiv lub viscosity ntawm 100,000, qhov tseem ceeb yog kom dej zoo dua. Daim ntawv thov ntawm cug: qhov yuav tsum tau ua, viscosity siab, xaiv xaiv viscosity 150,000. Daim ntawv thov ntawm cov nplaum: xav tau cov khoom lag luam tamsis no, siab viscosity, xaiv xaiv viscosity 200,000.
Yuav ua li cas txheeb xyuas qhov zoo ntawm hydroxyprropyyl methylculose?
Dawb: Txawm tias whiteness tsis txiav txim siab seb HPMC yooj yim siv, thiab yog tias tus neeg ntxuav hniav dawb tau ntxiv rau hauv cov txheej txheem ntau lawm, nws yuav cuam tshuam nws cov kev zoo. Txawm li cas los xij, feem ntau ntawm cov khoom lag luam zoo muaj zoo dawb.
Fineness: lub txiaj ntsig ntawm HPMC feem ntau 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua. Feem ntau HPMC tsim hauv Hebei yog 80 mesh. Tus finer lub fineness, qhov zoo dua.
Kev hloov pauv: Muab hydroxypropyl methylcellueculose (HPMC) hauv dej los ua ib qho kev hloov pauv colloid, thiab tshuaj xyuas nws cov kev hloov pauv. Lub permeability ntawm txoj kev ntsug yog feem ntau zoo, tab sis nws tsis tuaj yeem hais tau zoo dua li tias ntawm cov kab rov tav reactor, thiab muaj ntau yam khoom siv ua tau zoo.
Cov ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov sib tsoo tshwj xeeb, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb nqus tau loj, feem ntau vim tias cov ntsiab lus hydroxypropyl hauv nws siab, thiab cov dej ua ke yog qhov zoo dua.
Kev sib raug zoo ntawm viscosity thiab qhov kub ntawm hydroxypropyl methylcelulose
Lub viscosity coefficient of hpmc yog inversely proportional rau qhov kub, qhov ntawd yog qhov ntsuas kub, thiab ntsuas kub ntawm 20 degrees Celsius. Hauv cov kev siv tswv yim, hauv cov cheeb tsam uas muaj qhov sib txawv loj ntawm lub caij ntuj sov thiab lub caij ntuj no, nws yuav tsum tau sau tseg hauv lub caij ntuj no, uas yog qhov tseem ceeb rau kev tsim kho.
Lub luag haujlwm ntawm HPMC yog dab tsi?
Hauv cov hmoov putty, hpmc ua si peb lub zog: thickening, dej tuav thiab tsim kho.
Thickening: cellulose tuaj yeem ua tuab rau ncua, ua kom cov kev daws teeb meem thiab xwm yeem, thiab tiv taus sagging.
Dej khaws cia: Ua kom cov hmoov noj kom qhuav, thiab pab cov tshuaj tiv thaiv hmoov tshauv hauv qab dej.
Kev tsim kho: Cellulose muaj cov nyhuv muaj lubricating nyhuv, uas tuaj yeem ua rau cov hmoov puty muaj cov haujlwm zoo. HPMC tsis koom nrog kev tshuaj tiv thaiv tshuaj thiab tsuas yog ua lub luag haujlwm ntawm lub luag haujlwm. Ntxiv cov dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog tshuaj lom neeg. Vim tias tsim ntawm cov tshuaj tshiab, nqa cov hmoov nplej rau ntawm phab ntsa tawm ntawm phab ntsa, zom nws mus rau hauv cov hmoov, thiab siv nws dua. Nws yuav tsis ua haujlwm, vim tias cov tshuaj tshiab (calcium carbonate) tau tsim. .
Lub ntsiab Cheebtsam ntawm cov hmoov tshauv calcium hmoov yog: sib xyaw ntawm Ca (Oho thiab tus mob H2O, CA (OH) 2 + CA (OH)
Lub Sijhawm Post: Feb-20-2025