Raws li cov khoom siv ua haujlwm tseem ceeb, hydroxypropylulose (HPMC) yog dav siv nyob rau hauv cov nplaum ntawm kev tsim kho, tshuaj, thiab lwm yam kev ua tau zoo pab tau ua haujlwm ntawm cov nplaum.
Tshuaj lom neeg cov khoom thiab cov haujlwm yooj yim ntawm HPMC
HPMC yog qhov sib txuas ua los ntawm methylcellulose tom qab ib nrab hydroxyprore, uas muaj hydrophilicity thiab zaj duab xis-ua cov khoom. Nws tuaj yeem txhim kho kev ua tau zoo ntawm cov txheej txheem ntawm lub cev thiab cov kev cuam tshuam ntawm lub cev xws li cov kev cuam tshuam hydrolysis thiab o. HPMC lwg me me muaj cov pab pawg hydrophilic, uas tuaj yeem tsim kua viscous hauv dej, yog li cov nplaum muaj cov nplaum zoo thiab cov khoom lag luam zoo. Cov cuab yeej siv tshuaj lom no ua rau nws ua tau zoo hauv cov nplaum thiab tuaj yeem txhim kho lub zog uas muaj zog thiab cov nplaum ua kom ntev.
Lub zog ntawm lub cev ntawm HPMC txhim kho cov nplaum
Lub zog ntawm lub cev ntawm HPMC suav nrog kev hloov kho, ua yeeb yaj kiab, zaj duab xis muaj cov yam ntxwv ncaj qha rau kev ua kom zoo ntawm cov nplaum.
Viscosity Hloov: Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC hauv cov nplaum nplaum yog los kho cov viscosity ntawm lub system. Ntawm ntau qhov kub thiab txias, lub viscos hloov tsawg dua, uas ua rau txheej txheej ntawm cov nplaum ntau yam zoo nkauj thiab haum rau kev siv nyob rau hauv ntau yam ntawm kev tsim kho cov mob. Ib qho ntxiv, los ntawm xaiv HPMC nrog cov hnyav molecular, cov rheology ntawm cov nplaum tuaj yeem ua kom tau raws li kev tsim kho cov kev tsim kho.
Dej khaws cia: HPMC muaj cov khoom siv dej ua kom muaj zog ua kom muaj zog, tshwj xeeb tshaj yog nyob hauv cov nplaum dej. Nws tuaj yeem qeeb ntawm cov dej evaporation thiab ua kom ntev lub sij hawm qhib ntawm cov nplaum, yog li txhim kho qhov yooj yim ntawm kev tsim kho. Nyob rau tib lub sijhawm, nws tuaj yeem tiv thaiv cov txheej txheem ntawm ziab kom qhuav thaum ntxov thiab ua kom muaj kev ruaj ntseg ntawm lub zog ua kom muaj zog.
Zaj duab xis-ua cov cuab yeej: HPMC tuaj yeem tsim qhov hloov tau thiab muaj zog zaj duab xis nyob rau saum npoo ntawm substrate. Zaj yeeb yaj kiab no tsis tuaj yeem tsuas txhim kho kev kho tshuab zog ntawm cov nplaum, tab sis kuj tseem muab cov kua nplaum zoo, tab sis kuj tau hnav tsis kam, ua cov nplaum kom ruaj khov rau hauv daim ntawv thov.
Thickening thiab ruaj khov: hauv cov txheej txheem nplaum, HPMC tuaj yeem siv los ua cov tuab. Nws cov nyhuv tuab kom zoo dua cov khoom siv kev tsim kho thiab ua kom zoo ntawm cov nplaum. Tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov cov xwm txheej nrog cov viscosity siab tau txhim kho qhov ruaj khov ntawm cov nplaum ntawm cov nplaum thiab tsis muaj kev lom zem thiab dripping thaum tsim kho.
Daim ntawv thov HPMC nyob rau ntau hom nplaum
HPMC tuaj yeem siv tau dav hauv ntau hom nplaum, xws li cov nplaum dej, thiab cov nplaum tsim kho kom zoo nkauj yog pom tseeb.
Daim ntawv thov nyob rau hauv dej-nyob rau cov nplaum nplaum: Cov nplaum muaj cov nplaum, cov nplaum ntawm HPMC ua rau nws yaj sai thiab ua ib qho kev daws teeb meem. Qhov no pab txhawm rau txhim kho kev hnav ris tsho ntawm cov nplaum dej thiab tiv thaiv tsis ua haujlwm vim theem sib cais lossis ua kom tiav. Tsis tas li ntawd, cov dej khaws cia ntawm HPMC tuaj yeem pab txuas ntxiv lub neej ntawm cov nplaum dej thiab zam rau kev sib raug zoo vim tias ua kom nrawm nrawm thaum kev tsim kho.
Daim ntawv thov hauv cov nplaum polymer-raws li cov nplaum, HPMC muaj peev xwm ua tau zoo, thaum tseem ua tau lub luag haujlwm ntxiv, txhim kho qhov yooj yim thiab ua kom zoo dua qub ntawm cov nplaum. Tshwj xeeb tshaj yog nyob rau qee cov ntawv qhia nplaum uas yuav tsum tau tiv thaiv kev ntxhov siab lossis ib puag ncig HPMC tuaj yeem txhim kho nws cov kev laus tiv thaiv thiab txuas ntxiv lub neej pabcuam.
Daim ntawv thov nyob rau hauv cov nplaum nplaum: HPMC tau siv dav hauv cov nplaum nplaum, feem ntau hauv cov khoom lag luam xws li cov hmoov av nplaum, muab cov hmoov sib xyaw qhuav. Nyob rau hauv cov nplais nplaum, cov dej khaws cia thiab viscososity kev hloov kho ntawm cov vuas uas ua tau zoo, thiab txo qhov kev pheej hmoo ntawm hollowing thiab poob tawm. Nyob rau hauv putty hmoov thiab qhuav-mix cug, zaj duab xis-ua khoom ntiag tug ntawm HPMC tuaj yeem txhim kho cov txheej txheem thiab lub zog ntawm cov txheej thiab tiv thaiv kev tawg thiab tev.
Cov nyhuv tshwj xeeb ntawm HPMC ntawm Kev Txhim Kho Cov Khoom Siv Adhesive
Los ntawm kev tsom xam ntawm HPMC hauv cov nplaum hauv cov nplaum, nws tuaj yeem pom tias nws muaj qhov txhim kho tseem ceeb ntawm ntau cov nplaum ntawm cov nplaum:
Txhim kho txoj hlua khi nyiaj: HPMC tuaj yeem txhim kho txoj hlua khi ntawm nws cov nplaum ua yeeb yaj kiab thiab cohesion, tshwj xeeb tshaj yog hauv qee cov nplaum kom muaj zog.
Txhim kho kev tsim kho kev tsim kho: HPMC cov kev tsim kho kev tsim kho thiab rawv cov txheej txheem yooj yim rau kev tsim kho, tshwj xeeb yog kev txhim kho nws cov txheej txheem txheej sib dhos thiab kev zam tsis txhob txav mus thiab tsis txaus ntshai. Tsis tas li ntawd, nws cov dej khaws cov cuab yeej ntev lub sijhawm qhib ntawm cov nplaum, ua rau nws yooj yim rau cov neeg tsim kho cov neeg tsim kho kom haum lub sijhawm ntev.
Txhim kho cov durability: lub siab-zog zaj duab xis txheej tsim los ntawm HPMC nyob rau hauv cov nplaum ntawm cov khoom noj khoom haus ntawm noo noo, tshuaj lom neeg tiv taus thiab lwm yam khoom.
Kev ua phooj ywg ib puag ncig: raws li lub ntuj cellulose derivative, HPMC tau zoo tshaj plaws hauv kev ua phooj ywg ib puag ncig. Nws yog cov tsis muaj tshuaj lom thiab tsis muaj mob, thiab ua tau raws li qhov yuav tsum tau muaj kev tiv thaiv ntsuab. Tshwj xeeb hauv kev tsim kho thiab ntaub ntawv lag luam nrog kev tiv thaiv kev tiv thaiv siab, daim ntawv thov HPMC muaj kev cia siab.
Raws li kev sib ntxiv ntau ntxiv, HydroxyPropyyl methylcellose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm cov nplaum. Nws yog dav siv hauv kev tsim kho, polymer-based-based cov nplaum los ntawm kev txhim kho lub zog ntawm cov nplaum, txhim kho kev tsim kho thiab txhim kho lub siab. Tsis tas li ntawd, raws li ib puag ncig cov khoom siv nyob ib puag ncig, HPMC muaj cov ntawv thov siab thiab cov kev cia siab. Nyob rau hauv txoj kev txhim kho yav tom ntej, nrog kev nce qib nruam ntawm cov ntaub ntawv tshiab thiab thev naus laus zis, daim ntawv thov ntawm HPMC hauv thaj chaw nplaum nplaum yuav txuas ntxiv thiab sib sib zog nqus.
Lub Sijhawm Post: Feb-17-2025