HPMC (hydroxypropyl methylcellulose) yog ib hom polymer compound, uas yog dav siv nyob rau hauv ntau yam kev lag luam teb, tshwj xeeb tshaj yog nyob rau hauv formulation txheej txheem. HPMC binder yog suav tias yog cov khoom tseem ceeb hauv kev npaj ntau yam khoom. Nws muaj ntau yam haujlwm, suav nrog thickening, film-forming, bonding, stabilization thiab moisturizing.
1. Thickener thiab rheology hloov kho
Hauv ntau cov txheej txheem tsim, HPMC yog dav siv los ua cov thickener, tshwj xeeb tshaj yog nyob rau hauv txheej, nplaum, zaub mov thiab tshuaj lag luam. HPMC tuaj yeem ua kom cov viscosity ntawm cov kua tshuab ua kom muaj zog, ua rau cov qauv tsim muaj cov khoom zoo rheological. Piv txwv li, nyob rau hauv txheej txheej formulations, nws muaj peev xwm tiv thaiv sedimentation thiab txhim kho cov uniformity thiab kis tau ntawm cov ntaub ntawv. HPMC muaj cov dej solubility zoo heev hauv dej, tuaj yeem nqus dej sai thiab o los ua cov kua nplaum pob tshab. Cov cuab yeej no tso cai rau nws siv los tswj cov fluidity ntawm formulation, yog li txhim kho qhov yooj yim thiab sib xws ntawm kev tsim kho.
2. Binder
Ib qho ntawm lub luag haujlwm tseem ceeb ntawm HPMC yog raws li kev khi. Hauv cov khoom siv hauv tsev, tshuaj, khoom noj, tshuaj pleev ib ce, thiab lwm yam, nws yog feem ntau siv los txhim kho cov adhesion ntawm cov khoom los yog cov khoom. Hauv kev lag luam tshuaj, HPMC feem ntau siv los tsim cov ntsiav tshuaj. Los ntawm kev ntxiv qhov tsim nyog ntawm HPMC rau cov ntsiav tshuaj, cov tshuaj tuaj yeem tswj tau qhov zoo ntawm cov ntsiav tshuaj thiab maj mam tso cov tshuaj tom qab tawg. Hauv kev ua zaub mov, HPMC ua cov ntaub ntawv pab txhim kho cov viscosity ntawm cov khoom, muab cov khoom zoo nkauj zoo nkauj thiab cov qauv ruaj khov. Piv txwv li, hauv kev ua cov nplej zom, khoom qab zib, thiab lwm yam, nws tuaj yeem txhim kho qhov saj thiab zoo li ntawm cov khoom.
3. Film-forming tus neeg sawv cev
HPMC muaj cov cuab yeej ua yeeb yaj kiab zoo thiab yog siv los ua tus neeg ua yeeb yaj kiab ua yeeb yaj kiab hauv ntau cov qauv los tsim cov yeeb yaj kiab tsis sib xws thiab ntom ntom ntawm cov khoom. Piv txwv li, hauv kev lag luam tshuaj, HPMC feem ntau siv rau hauv cov txheej txheem txheej ntawm cov ntsiav tshuaj los tiv thaiv cov ntsiav tshuaj los ntawm kev ntub dej, oxidized lossis cuam tshuam los ntawm lwm yam ib puag ncig. Cov zaj duab xis txheej no tuaj yeem tsis tsuas yog txuas lub txee lub neej ntawm cov tshuaj, tab sis kuj txhim kho kev nqhis dej ntawm cov tshuaj, thaum tswj qhov tso tawm ntawm cov tshuaj. Ib yam li ntawd, hauv cov tshuaj pleev ib ce thiab khoom noj khoom haus, HPMC kuj tseem siv los txhim kho cov tsos thiab kev ntxhib los mos ntawm cov khoom thiab txuas ntxiv lub txee lub neej ntawm cov khoom los ntawm kev tsim cov yeeb yaj kiab tiv thaiv.
4. Stabilizer thiab emulsifier
HPMC kuj tseem ua lub luag haujlwm tseem ceeb hauv kev ruaj ntseg tshem tawm thiab emulsions. Nws tuaj yeem txhim kho kev ruaj ntseg ntawm cov khoom los ntawm kev ua kom cov viscosity thiab adhesion ntawm cov txheej txheem formulation, inhibiting sedimentation ntawm cov khoom thiab cov stratification ntawm cov kua theem. Hauv cov khoom siv hauv tsev, xws li cov cement mortar lossis cov nplais nplaum, HPMC tuaj yeem txhim kho cov dej tuav thiab ua haujlwm ntawm cov slurry, tiv thaiv dej tsis txaus thiab tawg ntawm cov khoom thaum lub sijhawm kho. Hauv cov tshuaj pleev ib ce, HPMC feem ntau siv rau hauv cov khoom xws li tshuaj pleev thiab tshuaj zawv plaub hau. Los ntawm nws cov emulsification thiab stabilization zog, cov roj thiab dej theem hauv cov khoom tuaj yeem sib xyaw ua ke thiab ruaj khov rau lub sijhawm ntev.
5. Moisturizer
HPMC kuj muaj qhov ua kom noo noo thiab feem ntau siv rau hauv cov qauv uas yuav tsum tau khaws cov dej noo. Nws tuaj yeem khaws cov dej noo zoo thiab tiv thaiv cov khoom los ntawm kev poob dej thaum lub sijhawm ziab lossis khaws cia. Piv txwv li, hauv kev lag luam khoom noj khoom haus, HPMC tuaj yeem siv rau hauv cov khoom ci, noodles, cov khoom noj khov-qhuav, thiab lwm yam los tiv thaiv lawv los ntawm ziab, tawv lossis tawg thaum khaws cia. Hauv cov tshuaj pleev ib ce, nws feem ntau yog siv los ua cov khoom siv moisturizing hauv cov khoom tu tawv nqaij los pab cov tawv nqaij nyob hydrated thiab du.
6. Tswj kev tso tshuaj
Hauv kev lag luam tshuaj, HPMC tau siv dav los ua tus neeg sawv cev tso tawm. Nws tuaj yeem tswj hwm tus nqi tso tawm ntawm cov tshuaj hauv lub cev, yog li ua kom lub sijhawm ntev ntawm cov nyhuv tshuaj. Hauv qee cov ntsiav tshuaj los yog tshuaj ntsiav, qhov sib ntxiv ntawm HPMC tso cai rau cov tshuaj maj mam tso tawm hauv tib neeg lub cev, ua kom tsis txhob muaj teeb meem ntawm cov nyhuv tshuaj uas ploj mus sai heev lossis ntau dhau. Tsis tas li ntawd, vim nws cov biocompatibility zoo thiab tsis muaj tshuaj lom, HPMC tau dhau los ua cov khoom siv rau ntau cov tshuaj tswj-tso tawm formulations.
7. Dej tuav thiab tawg tsis kam
Lwm qhov tseem ceeb ntawm kev siv HPMC hauv cov khoom siv hauv tsev yog txhawm rau txhim kho nws cov dej tuav thiab tawg ua haujlwm. Piv txwv li, nyob rau hauv cov cement mortar, gypsum-based khoom lossis mortar qhuav, HPMC tuaj yeem txhim kho cov dej khaws cia ntawm cov khoom sib tov. Cov cuab yeej no tseem ceeb heev los tiv thaiv cov evaporation ntawm cov dej sai heev thaum lub sij hawm ziab, yog li tsis txhob tsim cov kab nrib pleb. Nyob rau tib lub sijhawm, nws tseem tuaj yeem txhim kho kev ua haujlwm thaum lub sijhawm tsim kho, ua kom cov adhesion thiab anti-sagging peev xwm ntawm cov khoom, yog li ua kom cov nyhuv kawg ntawm cov khoom tom qab thov.
Raws li ib tug multifunctional polymer cov ntaub ntawv, HPMC yog dav siv nyob rau hauv formulation txheej txheem. Nws tsis tsuas yog muaj cov haujlwm yooj yim xws li thickening, film-forming, moisturizing, thiab bonding, tab sis kuj tseem siv tau los ua emulsifier, stabilizer, thiab tshuaj tso tawm tus neeg saib xyuas, thiab lwm yam, thiab tsim nyog rau ntau yam kev lag luam. Txawm hais tias nyob rau hauv cov khoom siv hauv tsev, tshuaj, khoom noj khoom haus, lossis kev lag luam tshuaj pleev ib ce, HPMC tuaj yeem muab kev txhim kho kev ua tau zoo, ua kom cov khoom ruaj khov dua, ua kom yooj yim dua, thiab muaj peev xwm ua tau raws li ntau yam kev thov. Los ntawm cov qauv tsim tsim nyog, cov khoom zoo ntawm HPMC tuaj yeem siv tag nrho los pab txhim kho cov khoom zoo thiab kev sib tw ua lag luam.
Post lub sij hawm: Oct-11-2024