HydroxyPropyyl methylulose (HPMC) yog ib feem siv dej-soluble polymer dav siv hauv cov kws tshuaj, cov tshuaj pleev ib ce, khoom noj khoom haus thiab kev tsim kho. HPMC muaj cov haujlwm ntawm kev xaiv viscosity, txhim kho emulsological, txhim kho, yog viscosity yog tus tseem ceeb ntsuas hauv nws cov ntawv thov.
1. Viscosity Cov yam ntxwv ntawm HPMC
Lub viscos ntawm HPMC yog ze ze rau nws txoj kev ua molecular, qib degree hloov chaw ntawm hydroxypropsyl thiab methyl pawg), kev daws teeb meem thiab lwm yam. Feem ntau hais lus, qhov hnyav dua ntawm cov molecular phaus, cov viscc ntau dua ntawm HPMC. Tsis tas li ntawd, HPMC cov kev daws teeb meem nrog qib siab dua ntawm cov qauv viscosity vim tias qhov kev ua yeeb yam cuam tshuam rau nws solubility thiab viscosity kev ua tau zoo.
Lub viscosity ntawm HPMC feem ntau ntsuas ntawm qee tus nqi shear tus nqi siv cov visi npe sib hloov. Nyob ntawm daim ntawv thov ntawm HPMC, cov nqi viscosity yuav tsum tau sib txawv.
2. Xav tau rau HPMC viscosity hauv cov ntawv thov sib txawv
Kws Tshuaj
Hauv kev lag luam kws tshuaj, HPMC feem ntau siv los npaj cov ntsiav tshuaj, tsiav tshuaj, tso quav thiab tshuaj tawm-tso tawm. Rau kev npaj ntawm cov ntsiav tshuaj thiab cov ntsiav tshuaj, HPMC ua si tseem ceeb ntawm cov kev cai tshuaj tawm los ntawm kev ua yeeb yaj kiab qub thiab thickener.
Kev Tso Tawm Tso Tawm: Tshuaj Tso Tawm Tso Tawm Kev Npaj Tso Tshuaj Siv HPMC kom muaj viscirecosity. Feem ntau hais lus, lub viscosity ntawm HPMC kev daws teeb meem yuav tsum tau tswj hwm ntawm 300 thiab 2000 Mpais Tim, uas pab txhawb nqa cov tshuaj. Yog lub viscososity yog qhov siab dhau, cov tshuaj yuav raug tso tawm qeeb; Thaum lub viscosity yog tsawg dhau, kev tswj hwm kev cuam tshuam ntawm cov tshuaj yuav tsis ruaj khov.
Tabletdression: thaum lub ntsiav tshuaj compression processions, viscosity ntawm HPMC muaj qhov tseem ceeb ntawm cov ntsiav tshuaj muaj thiab ua kom tsis tu ncua. Nyob rau lub sijhawm no, qhov viscosity yuav tsum nyob nruab nrab ntawm 500 thiab 1500 mpaischa los kom ntseeg tau zoo adhesion thiab kev ua txhaum cai kom zoo.
Khoom Noj Khoom Haus
Hauv kev lag luam khoom noj khoom haus, HPMC feem ntau siv los ua cov tuab thiab emulsifier hauv cov khoom lag luam xws li seasonings, mis nyuj khov, thiab kua txiv txiv hmab txiv ntoo. Cov khoom sib txawv muaj cov sib txawv yuav tsum tau ua rau lub visccosity ntawm HPMC:
Cov kua txiv ntoo haus: hauv cov kua txiv ntoo, lub viscosity ntawm HPMC yuav tsum tau tswj hwm ntawm 50 thiab 300 mpa-mpa a. Cov viscosity ntau dhau yuav ua rau cov dej haus kom saj dhau tuab heev, uas tsis muaj txiaj ntsig rau cov neeg siv khoom txais.
Mis nyuj khov: rau dej khov, HPMC yog siv los txhim kho nws cov qauv thiab smoothness. Nyob rau lub sijhawm no, tus nqi viscosity feem ntau yuav tsum tau tswj hwm ntawm 150 thiab 1000 mpa · S kom ntseeg tau tias cov mis nyuj khov muaj ib tus nplaig zoo ib yam.
Siv teb
Hauv kev tsim kho kev tsim kho, HPMC feem ntau siv nyob rau hauv cov ntaub ntawv hauv tsev xws li cement, gypsum thiab tshuaj khib. Lub luag haujlwm ntawm HPMC hauv cov ntaub ntawv no feem ntau yog ua kom tuab thiab txhim kho kev nyab xeeb. Nws viscosity ntau yog feem ntau dav, feem ntau 2000 rau 10000 mpa a. HPMC nyob rau hauv cov khoom no yuav ua tau zoo txhim kho kev tsim kho cov ntaub ntawv tsim kho tsev, xws li txhim kho cov kev ua haujlwm thiab lub sijhawm qhib.
Daim teb kom hniav zoo nkauj
Nyob rau hauv lub cosmetic teb, HPMC feem ntau siv nyob rau hauv cov qauv ntawm cov khoom lag luam, cov tshuaj pleev xim, feem ntau yog yuav tsum muaj kev ruaj khov, feem ntau yuav tsum tau ua kom zoo nkauj heev, li 1000 mpa. Cov viscosity siab dhau yuav ua rau cov ntawv thov tsis sib xws ntawm cov khoom lag luam, cuam tshuam rau cov neeg siv kev paub.
3. Cov yam cuam tshuam rau cov viscosity ntawm HPMC
Molecular qhov hnyav: qhov loj dua cov molecular hnyav ntawm HPMC, ntev dua cov molecular, thiab ntau dua viscosity ntawm kev daws. Rau HPMC nrog lub cev hnyav loj, lub viscosity ntawm nws cov kev daws teeb meem ntawm tib lub ntsiab lus yuav ua rau siab dua ntawm HPMC nrog qhov hnyav molecular. Yog li, xaiv HPMC nrog qhov hnyav molecular hnyav yog tus yuam sij rau kev tswj hwm viscosity.
Degree ntawm hloov chaw: Kev kawm qib siab hloov chaw ntawm HPMC, uas yog, qib degree hloov chaw ntawm hydroxyployl thiab methyl, yuav cuam tshuam nws viscosity. Qib siab dua ntawm kev hloov pauv ntau zaus ua rau HPMC lwg me me, thiab kev sib cuam tshuam ntawm molecules nce, ua rau muaj viscosity ntau ntxiv.
Kev daws teeb meem: kev xav ntawm HPMC kev daws teeb meem muaj ntau yam cawv ntawm viscosposity. Thaum tsis tshua muaj siab, lub viscosity ntawm HPMC daws yog tsawg; Ntawm cov kev muaj zog, kev sib cuam tshuam ntawm cov saw molecular yog txhim kho, thiab viscosity nce siab. Yog li ntawd, hauv cov ntawv thov siv, lub viscosity ntawm cov khoom kawg tuaj yeem tswj hwm los ntawm kev kho cov concentration ntawm HPMC.
Cov kuab tshuaj thiab ib puag ncig cov xwm txheej: lub solubility thiab viscosity ntawm HPMC kuj muaj feem cuam tshuam nrog hom kuab tshuaj thiab ib puag ncig (xws li Ph, ntsuas dej. Cov kuab tshuaj sib txawv thiab cov ntsuas hluav taws xob sib txawv thiab Ph Mob yuav hloov pauv cov solubility ntawm HPMC, yog li cuam tshuam lub viscosity ntawm nws cov tshuaj.
Lub viscosity ntawm HPMC yog ib qho ntawm cov tsis tseem ceeb hauv nws cov ntawv thov hauv ntau thaj teb. Nyob rau hauv cov tshuaj paus, kev tsim kho, tsim kho, tshuaj pleev ib ce, kev lag luam, lub viscosity ntawm HPMC yuav tsum tau tswj tsis pub dhau cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam sib txawv raws li cov khoom lag luam txawv. Los ntawm kev kho cov ntsiab lus xws li qhov hnyav molecular, cov qib ntawm HPMC, nws cov viscosity tuaj yeem tswj hwm tau raws li cov kev xav tau ntawm cov ntawv thov sib txawv. Nyob rau hauv cov txheej txheem ntau lawm, ua kom zoo rau lub piscosity rau cov kev xav tau yog tus yuam sij los xyuas kom cov khoom zoo thiab ua tau zoo.
Lub Sijhawm Post: Feb-19-2025