Dab tsi yog hypromellose tsim los ntawm?

Hypromellose, tseem hu ua HydroxyPropyyl methylulose (HPMC), yog semisynthetic polymer muab tau los ntawm cellulose polymer pom nyob rau hauv lub xovtooj ntawm cov nroj tsuag. Ntawm no yog qhov Hypromellose yog tsim tau:

1. Cellulose hauv qab daus: Cov txheej txheem pib nrog cov cellulose hauv cellulose, uas tuaj yeem tau txais los ntawm ntau cov nroj tsuag, paj rwb fibers, lossis lwm yam nroj tsuag. Cellulose feem ntau tau muab rho tawm los ntawm cov peev txheej los ntawm cov txheej txheem thiab cov txheej txheem tshuab kom tau txais cov khoom siv ua kom huv.
2. Ethetification: cellule cellulose undergoes cov txheej txheem tshuaj lom neeg hu ua ethermalation, uas hydroxypropsyl thiab methyl pawg tau qhia rau lub cellulose caj qaum. Qhov kev hloov kho no tau ua tiav los ntawm kev rov ua haujlwm cellulose nrog propylene oxide (los qhia hydroxypropal (los qhia cov methyl pawg) nyob rau hauv cov xwm txheej.
3. Kev ua kom huv thiab kev ua tiav: tom qab etherification, cov khoom lag luam undergoes purification kom tshem tawm impurities thiab cov khoom lag luam los ntawm cov tshuaj tiv thaiv. Lub lim hwv huv si yog tom qab ntawd ua tiav rau ntau hom ntawv xws li hmoov, granules, lossis cov kev daws teeb meem, nyob ntawm nws cov ntawv thov.
4. Kev tswj kom zoo: thoob plaws hauv kev tsim khoom, kev tswj hwm zoo yog siv los xyuas kom meej meej, xwm yeem, thiab kev ua haujlwm ntawm hypromellose khoom. Qhov no suav nrog kev sim rau cov tsis muaj molecular hnyav, viscosity, solubility, thiab lwm lub cev thiab tshuaj lom neeg.
5. Ntim thiab faib khoom: Thaum Hypromellose cov khoom tau raws li cov thawv ntim tau zoo, nws tau ntim rau hauv cov chaw tsim khoom, khoom lag luam, tshuaj pleev ib ce, thiab lwm yam kev siv.

Zuag qhia tag nrho, Hypromellose yog tsim los ntawm kev tswj cov tshuaj lom neeg thiab cov kauj ruam lim dej ntau thiab dav siv cov ntawv thov sib txawv hauv ntau yam kev lag luam.