1. Hydroxypropyl methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic ua los ntawm cov paj rwb ntuj lossis cov ntoo pulp los ntawm ntau cov txheej txheem ua tshuaj lom neeg xws li alkalization, etherification, thiab refining. Raws li nws cov viscosity, HPMC tuaj yeem muab faib ua cov khoom viscosity siab, viscosity nruab nrab, thiab cov khoom viscosity qis. Ntawm lawv, viscosity qis HPMC yog siv dav hauv ntau qhov chaw vim nws cov dej solubility zoo heev, cov khoom tsim zaj duab xis, lubricity, thiab kev ruaj khov dispersion.
2. Cov yam ntxwv tseem ceeb ntawm cov HPMC uas tsis muaj viscosity
Kev yaj dej: Cov viscosity qis HPMC yooj yim yaj hauv dej txias thiab tuaj yeem tsim cov kua pob tshab lossis pob tshab, tab sis tsis yaj hauv dej kub thiab feem ntau cov kuab tshuaj organic.
viscosity qis: Piv nrog rau nruab nrab thiab siab viscosity HPMC, nws cov tshuaj muaj viscosity qis dua, feem ntau yog 5-100mPa · s (2% aqueous kua, 25 ° C).
Kev Ruaj Ntseg: Nws muaj kev ruaj ntseg tshuaj zoo, nws tiv taus cov kua qaub thiab alkalis, thiab tuaj yeem tswj tau kev ua haujlwm ruaj khov hauv ntau yam pH.
Cov yam ntxwv ua yeeb yaj kiab: Nws tuaj yeem tsim ib zaj duab xis sib xws rau ntawm qhov chaw ntawm ntau yam substrates, nrog rau kev thaiv zoo thiab kev nplaum zoo.
Lubricity: Nws tuaj yeem siv los ua roj nplua nyeem kom txo qhov kev sib txhuam thiab txhim kho kev ua haujlwm ntawm cov khoom siv.
Kev ua haujlwm ntawm qhov chaw: Nws muaj qee yam emulsification thiab dispersing peev xwm thiab tuaj yeem siv rau hauv cov txheej txheem stabilization.
3. Cov teb thov ntawm HPMC uas tsis muaj viscosity
Cov ntaub ntawv siv hauv tsev
Cov tshuaj khib thiab cov khoom siv putty: Hauv cov tshuaj khib qhuav, cov tshuaj khib tus kheej, thiab cov tshuaj khib plastering, cov HPMC uas tsis muaj viscosity tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho, txhim kho kev ua haujlwm thiab kev nplua nuj, txhim kho kev khaws dej ntawm cov tshuaj khib, thiab tiv thaiv kev tawg thiab kev tawg.
Cov nplaum rau pobzeb: Nws yog siv los ua cov khoom nplaum thiab cov khoom sib txuas los txhim kho kev yooj yim ntawm kev tsim kho thiab lub zog sib txuas.
Cov tshuaj pleev xim thiab xim pleev: Ua ib qho thickener thiab suspension stabilizer, nws ua rau cov txheej txheem sib xws, tiv thaiv cov xim av, thiab txhim kho kev txhuam thiab kev sib npaug.
Tshuaj thiab khoom noj
Cov tshuaj ntxiv: HPMC uas tsis muaj viscosity tsawg tuaj yeem siv rau hauv cov tshuaj pleev xim rau ntsiav tshuaj, cov neeg sawv cev tso tawm tas mus li, cov tshuaj ncua, thiab cov tshuaj ntsiav sau hauv kev lag luam tshuaj kom ruaj khov, yaj, thiab tso tawm qeeb.
Cov khoom noj khoom haus ntxiv: siv ua cov khoom ua kom tuab, emulsifiers, stabilizers hauv kev ua zaub mov, xws li kev txhim kho saj thiab kev ntxhib los mos hauv cov khoom ci, cov khoom noj mis nyuj thiab kua txiv hmab txiv ntoo.
Cov tshuaj pleev ib ce thiab cov khoom siv tu tus kheej
Hauv cov khoom siv tu tawv nqaij, cov tshuaj ntxuav ntsej muag, cov tshuaj pleev, cov gels thiab lwm yam khoom, HPMC tuaj yeem siv los ua cov khoom ua kom tuab thiab moisturizer los txhim kho cov qauv khoom, ua kom yooj yim dua rau kev thov thiab txhim kho kev nplij siab ntawm daim tawv nqaij.
Cov khoom siv av nplaum thiab kev ua ntawv
Hauv kev lag luam ceramic, HPMC tuaj yeem siv los ua cov roj nplua nyeem thiab cov khoom pab molding los txhim kho qhov fluidity ntawm cov av nkos thiab txhim kho lub zog ntawm lub cev.
Hauv kev lag luam ua ntawv, nws tuaj yeem siv rau txheej ntawv los txhim kho qhov du thiab luam ntawv hloov pauv tau.
Kev ua liaj ua teb thiab kev tiv thaiv ib puag ncig
HPMC uas tsis muaj viscosity ntau tuaj yeem siv rau hauv cov tshuaj tua kab kom txhim kho kev ruaj khov ntawm cov tshuaj thiab txuas ntxiv lub sijhawm tso tawm.
Hauv cov ntaub ntawv ib puag ncig zoo, xws li cov tshuaj ntxiv rau kev kho dej, cov tshuaj tua plua plav, thiab lwm yam, nws tuaj yeem txhim kho kev ruaj khov ntawm kev sib kis thiab txhim kho cov txiaj ntsig siv.
4. Siv thiab khaws cia cov HPMC uas tsis muaj viscosity
Txoj kev siv
HPMC viscosity qis feem ntau yog muab los ua hmoov lossis granular daim ntawv thiab tuaj yeem ncaj qha mus rau hauv dej rau kev siv.
Txhawm rau tiv thaiv kev sib sau ua ke, nws raug pom zoo kom maj mam ntxiv HPMC rau hauv dej txias, do kom sib npaug thiab tom qab ntawd cua sov kom yaj kom tau txais cov txiaj ntsig zoo dua.
Hauv cov mis hmoov qhuav, nws tuaj yeem sib xyaw nrog lwm cov khoom siv hmoov thiab ntxiv rau hauv dej kom txhim kho kev ua haujlwm ntawm kev yaj.
Cov kev cai cia khoom
HPMC yuav tsum khaws cia rau hauv qhov chaw qhuav, txias, thiab muaj cua nkag tau zoo kom tsis txhob muaj qhov kub thiab txias thiab av noo.
Khaws cia kom deb ntawm cov tshuaj oxidants muaj zog kom tiv thaiv cov tshuaj tiv thaiv kom tsis txhob ua rau muaj kev hloov pauv ntawm kev ua haujlwm.
Qhov kub cia khoom raug pom zoo kom tswj tau ntawm 0-30 ℃ thiab zam kev tshav ntuj ncaj qha kom ntseeg tau tias cov khoom ruaj khov thiab lub neej ua haujlwm ntawm cov khoom.
Cov viscosity qis hydroxypropyl methylcelluloseUa lub luag haujlwm tseem ceeb hauv ntau yam lag luam xws li cov ntaub ntawv siv hauv tsev, tshuaj thiab khoom noj, tshuaj pleev ib ce, ntawv ua los ntawm cov av nplaum, thiab kev tiv thaiv ib puag ncig ua liaj ua teb vim nws cov dej yaj zoo heev, lubricity, khaws dej thiab cov khoom ua zaj duab xis. Nws cov yam ntxwv viscosity qis ua rau nws tsim nyog dua rau cov xwm txheej thov uas xav tau fluidity, dispersibility thiab ruaj khov. Nrog rau kev txhim kho tas mus li ntawm kev siv tshuab kev lag luam, daim ntawv thov ntawm qis viscosity HPMC yuav nthuav dav ntxiv, thiab nws yuav qhia txog kev cia siab dav dua hauv kev txhim kho kev ua haujlwm ntawm cov khoom thiab ua kom zoo dua cov txheej txheem ntau lawm.
Lub sijhawm tshaj tawm: Lub Peb Hlis-25-2025