HPMC (HydroxyPropyyl methylulose) yog cov khoom siv ntau ntau ntxiv siv hauv chaw muag tshuaj, khoom noj khoom haus, cov ntaub ntawv tsim tsev thiab lwm thaj teb. HPMC cov khoom tuaj yeem faib ua ntau lub koob raws li cov kev thov sib txawv, ntawm cov uas ntau dua yog K series thiab e series. Txawm hais tias ob leeg yog HPMC, lawv muaj qee qhov sib txawv hauv cov qauv tshuaj, cov khoom siv lub cev thiab cov ntawv thov cov ntawv thov.
1. Qhov sib txawv hauv cov qauv tshuaj
Cov ntsiab lus methoxy: qhov sib txawv tseem ceeb ntawm K series thiab E Series HPMC yog lawv cov ntsiab lus methoxy. Cov ntsiab lus methoxy ntawm E Series HPMC yog siab dua (feem ntau 28-30%), Thaum cov ntsiab lus methoxy ntawm K series yog qhov tsawg (txog 19-24%).
HydroxyPropEXY cov ntsiab lus: Hauv kev sib piv, cov ntsiab lus hydroxyprropoxy ntawm K series (7-12%) yog siab dua li ntawm e series (4-7.5%). Qhov sib txawv no hauv kev sib txawv tshuaj lom ua rau sib txawv hauv kev ua tau zoo thiab kev ua ntawv ntawm ob.
2. Qhov sib txawv ntawm cov khoom siv lub cev
Solubility: vim qhov sib txawv hauv methoxy thiab hydroxyprropoxy cov ntsiab lus, solubility ntawm K Series HPMC yog qis dua li ntawm ER koob, tshwj xeeb tshaj yog nyob rau hauv dej txias. Cov e series yog ntau soluble hauv dej txias vim nws cov ntsiab lus metoxy siab dua.
Gel kub kub: lub gel kub ntawm k series yog siab tshaj qhov ntawm e series. Qhov no txhais tau tias nyob rau hauv tib qho kev mob, nws nyuaj dua rau K series hPMC los ua gel. Lub gel kub ntawm e series yog qis dua, thiab hauv qee cov ntawv thov tshwj xeeb, xws li cov khoom siv gelasensitive, cov ntaub ntawv e series yuav ua tau zoo dua.
Viscosity: Txawm hais tias viscosity tsuas yog nyob ntawm cov molecular hnyav ntawm HPMC, nyob rau hauv tib qho kev mob, lub viscosity ntawm ib qho kev mob siab, lub viscosity ntawm ib qho kev mob siab yog siab dua li ntawm K series. Qhov sib txawv hauv viscosity muaj qhov cuam tshuam tseem ceeb ntawm cov khoom siv rheological thaum lub sijhawm npaj npaj, tshwj xeeb tshaj yog thaum siv rau cov txheej txheem thiab raug ncua.
3. Qhov sib txawv hauv cov ntawv thov
Vim tias qhov sib txawv ntawm cov qauv tshuaj thiab cov khoom siv ntawm K series thiab E Series HPMC, lawv cov ntawv thov hauv cov teb sib txawv kuj sib txawv.
Kws Kho Mob Tshuaj: Hauv kev npaj khoom lag luam, E-series HPMC feem ntau siv los ua cov khoom tseem ceeb ntawm kev npaj kom muaj kev npaj kom muaj. Qhov no yog vim nws qhov gelation qis thiab siab viscosity, uas ua rau nws kom tswj tau cov tshuaj tso tawm thaum tsim cov yeeb yaj kiab tso tawm. Cov kab ntawv K series yog siv ntau rau cov ntsiav tshuaj enteric-coated thiab raws li cov tshuaj ntsiav phab ntsa hauv cov pa tawm hauv cov pa tawm hauv cov hnyuv.
Cov Khoom Noj Khoom Haus: Hauv kev lag luam khoom noj khoom haus, E-series HPMC feem ntau siv los ua cov tuab, stabilizer thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier. Vim nws cov solubility siab thiab haum viscosity, nws tuaj yeem zoo dua dispersed thiab yaj hauv cov zaub mov. K series feem ntau siv nyob rau hauv cov zaub mov uas yuav tsum tau tswj ruaj khov raws li cov kev mob siab, xws li cov khoom ci, vim nws lub siab gelation kub.
Lub tsev cov ntaub ntawv teb: hauv cov ntaub ntawv hauv tsev, K series HPMC feem ntau yog siv rau hauv cov hmoov txhuam thiab tuab, tshwj xeeb yog rau kev tsim kho thaum muaj qhov kub. Cov e series yog qhov tsim nyog rau cov ntaub ntawv nrog rheological cov yam ntxwv xws li cov xim av hauv pem teb thiab cov xim ntau dua vim nws cov gelation qis thiab muaj viscosity.
4. Lwm cov yam ntxwv cuam tshuam
Ntxiv rau cov kev sib txawv saum toj no, kev siv sib txawv ntawm HPMC kuj tseem muaj kev cuam tshuam los ntawm kev hnyav xws li molecular hnyav, degree hloov chaw, thiab dispersibility. Ib qho ntxiv, hauv cov ntawv thov siv, xaiv HPMC kuj yuav tsum xav txog nws cov khoom xyaw thiab nws cuam tshuam rau kev ua haujlwm ntawm cov khoom kawg.
Txawm hais tias K series thiab E Series ntawm HPMC yog ob qho tib si Hydroxypropylulose, lawv tau thov sib txawv vim yog methoxy thiab hydroxypropoxy pawg. Nkag siab cov kev sib txawv no yog qhov tseem ceeb los xaiv hom HPMC yog kev siv tau.
Lub sij hawm Post: Lub Yim-13-2024