1. Hydroxypropyl methylcellulose (HPMC)yog ib qho non-ionic cellulose ether ua los ntawm ntuj paj rwb fiber ntau los yog ntoo pulp los ntawm cov txheej txheem tshuaj lom neeg xws li alkalization, etherification, thiab refining. Raws li nws cov viscosity, HPMC tuaj yeem muab faib ua cov viscosity siab, nruab nrab viscosity, thiab cov khoom muaj viscosity tsawg. Ntawm lawv, tsis tshua muaj viscosity HPMC yog dav siv nyob rau hauv ntau qhov chaw vim nws cov dej solubility zoo heev, cov cuab yeej ua yeeb yaj kiab, lubricity, thiab dispersion stability.
2. Cov yam ntxwv tseem ceeb ntawm cov viscosity tsawg HPMC
Dej solubility: Tsawg viscosity HPMC yog yooj yim soluble nyob rau hauv dej txias thiab muaj peev xwm tsim ib tug pob tshab los yog translucent viscous kua, tab sis yog insoluble nyob rau hauv dej kub thiab feem ntau organic solvents.
Tsawg viscosity: Piv nrog rau nruab nrab thiab siab viscosity HPMC, nws cov tshuaj muaj viscosity qis dua, feem ntau yog 5-100mPa·s (2% aqueous tov, 25 ° C).
Kev ruaj ntseg: Nws muaj cov tshuaj lom neeg ruaj khov zoo, kuj ua rau cov kua qaub thiab alkalis, thiab tuaj yeem tswj xyuas kev ua haujlwm ruaj khov hauv ntau qhov pH.
Cov cuab yeej ua yeeb yaj kiab: Nws tuaj yeem tsim cov yeeb yaj kiab tsis sib xws ntawm qhov sib txawv ntawm cov substrates, nrog cov khoom thaiv zoo thiab adhesion.
Lubricity: Nws tuaj yeem siv los ua cov roj nplua nyeem kom txo kev sib txhuam thiab txhim kho kev ua haujlwm ntawm cov khoom.
Kev ua haujlwm saum npoo: Nws muaj qee yam emulsification thiab dispersing peev xwm thiab tuaj yeem siv rau hauv kev ncua kev ruaj ntseg.
3. Daim ntawv thov teb uas tsis muaj viscosity HPMC
Cov khoom siv hauv tsev
mortar thiab putty: Hauv mortar qhuav, self-leveling mortar, thiab plastering mortar, low-viscosity HPMC tuaj yeem txhim kho kev tsim kho, txhim kho fluidity thiab lubrication, txhim khu cov dej tuav ntawm mortar, thiab tiv thaiv kev tawg thiab delamination.
Pobzeb nplaum: Nws yog siv los ua cov thickener thiab binder los txhim kho kev tsim kho yooj yim thiab kev sib txuas lub zog.
Coatings thiab xim: Raws li cov thickener thiab ncua kev kawm ntawv stabilizer, nws ua rau cov txheej txheem sib xws, tiv thaiv cov xim sedimentation, thiab txhim kho kev txhuam hniav thiab kev sib tw.
Tshuaj thiab zaub mov
Pharmaceutical excipients: Tsawg-viscosity HPMC tuaj yeem siv rau hauv cov ntsiav tshuaj txheej, cov tshuaj tiv thaiv kev tso tawm, kev ncua, thiab cov tshuaj ntsiav tshuaj hauv kev lag luam tshuaj kom ruaj khov, solubilize, thiab tso tawm qeeb.
Khoom noj khoom haus additives: siv los ua thickeners, emulsifiers, stabilizers nyob rau hauv cov khoom noj, xws li kev txhim kho saj thiab kev ntxhib los mos nyob rau hauv ci khoom, khoom noj siv mis thiab kua txiv hmab txiv ntoo.
Tshuaj pleev ib ce thiab khoom tu tus kheej
Hauv cov khoom siv tu tawv nqaij, tshuaj ntxuav lub ntsej muag, tshuaj kho mob, gels thiab lwm yam khoom, HPMC tuaj yeem siv los ua cov thickener thiab moisturizer los txhim kho cov khoom zoo nkauj, ua kom yooj yim rau kev thov thiab txhim kho cov tawv nqaij.
Ceramics thiab papermaking
Hauv kev lag luam ceramic, HPMC tuaj yeem siv los ua cov roj nplua nyeem thiab cov khoom siv molding los txhim kho cov dej ntws ntawm cov av nkos thiab txhim kho lub zog ntawm lub cev.
Hauv kev lag luam papermaking, nws tuaj yeem siv rau cov ntawv txheej txhawm rau txhim kho qhov smoothness thiab luam ntawv hloov pauv ntawm daim ntawv.
Kev ua liaj ua teb thiab kev tiv thaiv ib puag ncig
Tsawg viscosity HPMC tuaj yeem siv rau hauv kev tshem tawm cov tshuaj tua kab los txhim kho cov tshuaj ruaj khov thiab ncua sij hawm tso tawm.
Nyob rau hauv ib puag ncig cov ntaub ntawv, xws li dej kho additives, plua plav suppressants, thiab lwm yam, nws muaj peev xwm txhim khu kev ruaj ntseg dispersion thiab txhim kho kev siv.
4. Siv thiab cia cov viscosity tsawg HPMC
Txoj kev siv
Tsawg viscosity HPMC feem ntau yog muab rau hauv cov hmoov lossis granular daim ntawv thiab tuaj yeem faib ncaj qha rau hauv dej rau kev siv.
Txhawm rau tiv thaiv agglomeration, nws raug nquahu kom maj mam ntxiv HPMC rau cov dej txias, do sib npaug thiab tom qab ntawd kub kom yaj kom tau txais txiaj ntsig zoo dua.
Nyob rau hauv cov hmoov qhuav qhuav, nws tuaj yeem sib tov sib npaug nrog lwm cov ntaub ntawv hmoov thiab ntxiv rau hauv dej los txhim kho kev ua kom tiav.
Cov cai cia khoom
HPMC yuav tsum muab cia rau hauv qhov chaw qhuav, txias, qhov cua zoo kom tsis txhob kub thiab av noo.
Khaws kom deb ntawm cov oxidants muaj zog los tiv thaiv cov tshuaj lom neeg los ntawm kev ua haujlwm hloov pauv.
Qhov ntsuas kub tau pom zoo kom tswj tau ntawm 0-30 ℃ thiab tsis txhob tshav ntuj ncaj qha kom ntseeg tau tias kev ruaj ntseg thiab kev pabcuam lub neej ntawm cov khoom.
Tsawg viscosity hydroxypropyl methylcelluloseplays lub luag haujlwm tseem ceeb hauv ntau qhov kev lag luam xws li cov khoom siv hauv tsev, tshuaj thiab khoom noj, tshuaj pleev ib ce, ceramic papermaking, thiab kev tiv thaiv kev ua liaj ua teb ib puag ncig vim nws cov dej solubility zoo, lubricity, dej tuav thiab cov khoom ua yeeb yaj kiab. Nws cov yam ntxwv viscosity tsawg ua rau nws tsim nyog rau daim ntawv thov scenarios uas xav tau fluidity, dispersibility thiab stability. Nrog rau kev txhim kho txuas ntxiv ntawm kev lag luam thev naus laus zis, daim ntawv thov kev lag luam ntawm cov viscosity tsawg HPMC yuav raug nthuav dav ntxiv, thiab nws yuav nthuav tawm qhov kev cia siab ntau dua hauv kev txhim kho cov khoom lag luam thiab ua kom cov txheej txheem ntau lawm.
Lub sij hawm xa tuaj: Mar-25-2025