HydroxyPropy cellulose (HPMC), tseem paub los ntawm lub npe lag luam Hypromellose, yog cov hluavtaws polymer muab tau los ntawm ntuj cellulose. Thawj qhov chaw ntawm cellulose rau kev tsim HPMC feem ntau yog ntoo pulp lossis paj rwb. Cov txheej txheem tsim khoom lag luam cuam tshuam rau lub cellated kho lub cellulose los ntawm ethermalification, qhia pawg hydroxypropyl thiab methyl pawg mus rau lub cellulose cellebone.

Zus Tau Ntau Lawm HPMC koom nrog ntau kauj ruam:

1. Cellulose tawm:
   • Lub cellulose tau muab los ntawm kev cog cov khoom, feem ntau ntoo pulp lossis paj rwb. Lub cellulose tau muab rho tawm thiab huv si los ua cov cellulose pulp.
2. Alkalization:
   • Lub cellulose colp yog kho nrog ib qho kev daws teeb meem alkaline, feem ntau sodium hydroxide (Naoh), kom qhib cov pab pawg hydroxyl ntawm lub cellulose saw.
3. Eetherification:
   • Ethegation yog cov kauj ruam tseem ceeb hauv kev tsim HPMC. Lub cellulized alkalized yog rearsed nrog propylene oxide (rau hydroxypropylropyl pawg) los qhia cov pab pawg metaws ntxiv rau hauv pob cellulose mus rau lub cellulose pawg.
4. Neutralization Thiab Ntxuav:
   • Lub resulting hloov cellulose, uas yog tam sim no hydroxypropyl cellulose, undergoes ib tug neutralation los tshem tawm ib qho seem uas tshuav. Nws yog tom qab ntawd ua tib zoo ntxuav kom tshem tawm impurities thiab cov khoom lag luam.
5. Kom qhuav thiab milling:
   • Cov cellulose hloov tau qhuav los tshem tawm ntau dhau noo thiab yog tom qab ntawd milled rau hauv ib qho hmoov zoo. Lub particle loj tuaj yeem tswj tau raws li cov ntawv thov.

Lub txiaj ntsig HPMC yog qhov dawb lossis tawv nqaij dawb nrog cov qib sib txawv ntawm cov qib hydroxypropyl thiab methyl dua. Cov khoom tshwj xeeb ntawm HPMC, xws li nws solubility, viscosity, thiab lwm yam kev ua tau zoo, nyob ntawm cov degree ntawm hloov chaw thiab kev tsim khoom.

Nws yog ib qho tseem ceeb kom nco ntsoov tias HPMC yog cov khoom siv hluavtaws ib nrab, thiab thaum nws muaj cov khoom siv tseem ceeb thaum ua kom tiav cov khoom siv tsim nyog rau ntau qhov kev siv khoom.