HPMC cov ntawv thov ua cov txheej txheem thiab cov nplaum

Abstract:

HydroxyPropyyl methylulose (HPMC) yog ib qho kev siv nyiaj polymer hauv ntau yam kev lag luam vim nws cov yam ntxwv muaj peev xwm, thiab cov yam ntxwv nplaum. Hauv cov txheej txheej thiab cov nplaum, HPMC pabcuam ntau lub luag haujlwm ntau, xws li kev txhim kho viscosity thiab ruaj khov los txhim kho adhesion thiab zaj duab xis.
Cov ntsiab lus: HydroxyPropyyl methylcellose (HPMC), cov tshuaj nplaum, cov nplaum, ua yeeb yaj kiab, kos duab, kev tsim qauv, muaj kev ruaj khov.

Taw qhia:

HydroxyPropyyl methylulose (HPMC), lub cellulose derivative synthesized los ntawm ntoo pulp lossis paj rwb, tau tshwm sim los ntawm kev tseem ceeb hauv cov txheej txheem thiab cov nplaum ua kom zoo nkauj. Nws cov qauv tshuaj tshwj xeeb, cim los ntawm cov pab pawg meydroxropyl thiab methyl pawg txuas rau tus pob cellulose, ua kom muaj txiaj ntsig tshwj xeeb ntawm cov ntawv thov no. HPMC cov versatility stems los ntawm nws lub peev xwm los hloov kho rheological tus cwj pwm, thiab txhim kho kev ua yeeb yaj kiab, ua rau nws tsis tseem ceeb hauv cov txheej txheej thiab cov adhesives kev lag luam.

Rheological hloov kho:

Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC hauv cov txheej txheej thiab cov nplaum yog nws lub luag haujlwm hauv kev hloov kho rheological. Los ntawm kev kho cov siab thiab cov qauv hnyav ntawm HPMC, cov kws sau ntawv tuaj yeem tswj pom tseeb xws li cov ntaub ntawv uas yog cov txhuam hniav, tshuaj tsuag, thiab cov menyuam cov txheej txheem. HPMC ua haujlwm ua cov tuab tuab, ua kom muaj pseudoplastic los tsim cov qauv, tso cai yooj yim ntawm kev thov thiab txhim kho txheej txheej sib xyaw ua ke. Ntxiv mus, nws tus cwj pwm shear-thinning kom tsim nyog leveling thiab zaj duab xis tsim raws li daim ntawv thov, ua rau muaj kev ywj pheej, qhov tsis muaj qhov tsis txaus.

Zaj duab xis tsim thiab kev thaiv cov khoom:

Hauv cov tsho tiv no, HPMC pab txhawb ntau yam ua yeeb yaj kiab tsim thiab thaiv cov khoom. Raws li zaj duab xis-ua tus neeg sawv cev, HPMC tsim cov txheej txuas ntxiv mus, kho kom tsis tu ncua, huab cua tsis kam, thiab noo noo kev thaiv cov khoom siv rau txheej. Nws cov kev ua yeeb yaj kiab zoo tshaj plaws ua rau muaj kev txhim kho ntawm cov nplaum uas zoo dua, nrog rau cov hlau, kom zoo nkauj, yog li nthuav tawm txoj haujlwm ntawm kev lag luam ntau haiv neeg thoob plaws kev lag luam ntau yam. Tsis tas li ntawd, HPMC-based txheej txheem nthuav tawm cov teeb meem kev tawm tsam cov roj av, dej vapor, thiab lwm yam kev sim ua kom lub neej ntawm cov chaw coated.

Adhesion txhim kho:

Hauv cov qauv nplaum ua ke, HPMC pabcuam ua cov khoom siv tseem ceeb rau kev txhim kho adhesion mus rau lwm qhov sib txawv. Nws cov teeb meem hydrophilic thiab cov qauv molecular pab txhawb kev sib cuam tshuam nrog cov chaw ntub dej, txhawb kev ntub dej thiab cuam tshuam cov nplaum. Los ntawm kev sib xyaw HPMC rau hauv cov qauv nplaum nplaum, cov chaw tsim khoom tuaj yeem ua tiav kev txhim kho bond zog, tev tsis kam, tseem ceeb rau kev siv nyiaj los ntawm kev tsim kho. Tsis tas li ntawd, HPMC-raws li cov nplaum muaj cov txiaj ntsig zoo xws li txo qis shrinkage, thiab kev ua tiav nrog kev cog qoob loo rau kev daws teeb meem nplaum kom ruaj khov.

Tsim kev txhim kho thiab kev ua kom ruaj khov:

Cov versatility ntawm HPMC txuas rau nws lub luag haujlwm hauv kev tsim qauv kev txhim kho thiab kev txhawb nqa kom ruaj khov rau hauv cov txheej txheej thiab kev lag luam adhesives. Nws cov kev sib raug zoo nrog lwm cov polymers, cov quav roj ntxiv, thiab cov kuab tshuaj rau cov kev ua tau zoo thaum ua kev tswj hwm tus nqi zoo. Tsis tas li ntawd, HPMC pab txhawb kev siv zog los ntawm kev txhim kho cov qauv dej sib xyaw ua ke, thiab kev txhawb nqa hauv eco-incissions ua yeeb yaj kiab. Raws li kev cai nyem thiab kev txhawj xeeb ib puag ncig escalate, HPMC tawm los ua cov cuab yeej muaj txiaj ntsig zoo rau kev ua tiav ob qho kev ua tau zoo thiab cov khoom muaj sia nyob hauv cov txheej txheem.

HydroxyPropyyl methylcellueculose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev hloov pauv thiab cov nplaum ntawm cov txiaj ntsig thiab cov yeeb yaj kiab tsim rau Adhesion txhim kho thiab muaj kev ruaj ntseg. Nws cov vagatility thiab sib haum ua nws tau indispensable khoom muaj nyob rau hauv cov qauv kev loj hlob, ua rau cov chaw tsim khoom kom sib ntsib thaum hais txog kev txhawj xeeb ib puag ncig. Raws li cov pleev xim thiab kev lag luam adhesives tseem txuas ntxiv, HPMC tau poisised kom nyob twj ywm hauv lub pob kws, tsav tsheb hauv kev ua haujlwm hauv cov khoom lag luam, ua haujlwm tau zoo, thiab kev ruaj khov.