HydroxyPropyyl methylcellose (HPMC) yog cov khoom siv polymer ntau yam siv, kev tsim khoom noj, kev lag luam, thiab ntau yam kev lag luam. Nws cov khoom tshwj xeeb ua rau nws muaj txiaj ntsig zoo hauv cov ntawv thov los ntawm kev siv tshuaj tsis zoo rau cov neeg sawv cev hauv cov khoom noj. To taub cov txheej txheem tsim khoom thiab ntws ntawm HPMC yog qhov tseem ceeb rau kev ua kom cov khoom lag luam zoo thiab muaj txiaj ntsig.
1.Raw khoom siv:
a. Cellulose Source: HPMC yog muab tau los ntawm cellulose, feem ntau yog los ntawm ntoo pulp lossis cov paj rwb.
b. Yuav tsum muaj kev yuav huv: cellule cellulose tseem ceeb los xyuas kom meej HPMC. Kev impurities tuaj yeem cuam tshuam rau kev ua tau zoo thiab cov khoom ntawm cov khoom kawg.
c. Qib ntawm kev hloov pauv (DS): DS ntawm HPMC txiav txim siab nws solubility thiab gelation khoom. Cov neeg tsim khoom xaiv cellulose nrog DS theem li ntawm daim ntawv thov xav tau.
2. Cov tshuaj tiv thaiv:
a. Etherification tus neeg sawv cev: Proporsification oxide thiab methyl chloride feem ntau siv etherification tus sawv cev hauv HPMC ntau lawm.
b. Cov kev mob tshwm sim: Qhov kev tawm tsam tiv thaiv kab mob tshwm sim tshwm sim nyob rau hauv kev tswj kub, thiab Ph Mob kom ua tiav DS.
c. Catalysts: Alkali catalysts xws li sodium hydroxide lossis potassium hydrochoide feem ntau ua haujlwm los pab txhawb qhov kev tiv thaiv kab mob herherification.
d. Kev Ntsuam Xyuas: Kev saib xyuas txuas ntxiv ntawm cov tshuaj tiv thaiv yog qhov tseem ceeb kom paub meej DS thiab cov khoom lag luam zoo.
3.purification thiab ntxuav:
a. Kev tshem tawm ntawm impurities: cov crude hpmc undergoes purification purification cov txheej txheem kom tshem tawm reagents reagents, los ntawm cov khoom lag luam, thiab impurities.
b. Ntxuav cov kauj ruam: ntau cov kauj ruam ntxuav nrog dej lossis cov kuab tshuaj organic yog nqa tawm kom huv lub HPMC thiab ua tiav txoj kev xav tau qib siab.
c. Kev txiav tawm thiab kom qhuav: Cov tswv yim lim tau ua haujlwm cais HPMC los ntawm kev ntxuav cov tshuaj, ua raws los ntawm kev ziab kom tau txais cov khoom kawg hauv cov hmoov lossis cov ntawv sib dhos.
4.Particle loj tswj:
a. Sib tsoo thiab milling: hpmc hais yog feem ntau raug rau kev sib tsoo thiab siv cov txheej txheem kev faib tawm kom tswj tau cov particle loj.
b. Cov txheej txheem: Sieving tau ua haujlwm los xyuas kom meej cov txheej txheem faib tawm thiab tshem tawm cov khoom loj me.
c. Cov cim particle: particle kev tshawb xyuas me me xws li laser diffraction lossis metascopy yog siv los ua kom HPMC hais thiab ua kom paub meej tias yog cov lus qhia tshwj xeeb.
5.Lending thiab Tsim:
a. Kev sib xyaw ua ke: HPMC yuav tau sib xyaw nrog lwm cov kev zam lossis kev ntxiv rau txiav nws cov khoom ntiag tug rau cov ntawv thov tshwj xeeb.
b. Homogenization: Kev sib tshuam cov txheej txheem kom ua kom muaj kev faib tawm ntawm HPMC nyob rau hauv kev tsim kom ua tiav cov yam ntxwv xav ua kev xav tau.
c. Tsim kom zoo: Tsim qauv xws li HPMC concentration, particle loj, thiab sib xyaw ua tau zoo los ntawm kev sim tsim thiab kev sim.
6.Qhov tswj:
a. Kev Ntsuam Xyuas Kev Ntsuas: Ntau yam kev ntsuas tshuaj ntxiv xws li infrared specroscopy, chromatography, thiab rhelology tau ua haujlwm rau kev tswj hwm HPMC.
b. DS kev txiav txim siab: DS ntawm HPMC yog cov kev ntsuas kom ua kom muaj xwm yeem thiab kev yoog raws li cov lus qhia tshwj xeeb.
c. Kev tsom xam ntawm kev tsis sib haum xeeb: Cov qib kev sib cav sib ceg, cov ntsiab lus hlau hnyav tau raug saib xyuas kom ntseeg tau tias cov qauv kev nyab xeeb thiab ua raws li cov qauv kev cai lij choj.
7.Packaging thiab cia:
a. Ntim khoom: HPMC feem ntau ntim rau hauv cov dej noo-tiv thaiv kom tiv thaiv kev ua tsis raws cai thiab muaj cov khoom muaj kev ncaj ncees.
b. Kev Cia Siab: HPMC ib puag ncig kom deb ntawm lub hnub ci kom deb ntawm kev ua tshav ntuj kom tsis txhob muaj kev nqus dej noo thiab kev tsis yeem.
c. Txee lub neej: zoo ntim thiab khaws cia HPMC muaj peev xwm muaj lub txee lub neej muaj ntau lub hlis mus rau xyoo, nyob ntawm cov qauv thiab kev cia.
Cov txheej txheem tsim khoom ntawm HPMC suav nrog cov kauj ruam zoo-txhais tau zoo, los ntawm raw khoom xaiv rau ntim khoom kawg. Txhua theem yuav tsum tau ua tib zoo tswj thiab saib xyuas kom ntseeg tau tias cov khoom lag luam zoo, xwm yeem, thiab ua raws li cov qauv kev cai lij choj. Los ntawm kev nkag siab cov txheej txheem tsim khoom thiab ntws ntawm HPMC, cov tuam txhab tsim tau tuaj yeem ua kom tau zoo tshaj plaws ntawm kev lag luam ntau yam.
Lub Sijhawm Post: Feb-18-2025