HydroxyPropY Metylcellulose (HPMC) yog qhov siv dav dav dav hauv ntub dej xyaw xyaw ua coll ntau lawm. Lub cellulose ether compacter muaj cov khoom tshwj xeeb uas txhim kho kev ua haujlwm, ruaj khov thiab kev ua haujlwm ntawm cov neeg nplua nuj. Lub luag haujlwm tseem ceeb HPMC yog txhawm rau nce dej khaws cia thiab cov nplaum, yog li txhim kho txoj kev sib sau ntawm cug.
1. Txhim Kho Kev Ua Haujlwm
Qhov ua haujlwm ntawm ntub alpical collh hais txog nws lub peev xwm yuav tau yooj yim thiab nchuav thaum kev tsim kho. Qhov no yog cov cuab yeej tseem ceeb kom ntseeg tau tias cug cug yog yooj yim sib xyaw, ncuav thiab ua. HPMC ua raws li cov yas ua kom muab cov dej khov kho kom ruaj khov thiab viscosity rau cug cug. Nrog rau kev sib xyaw ntawm HPMC, cug txig ntau dua viscous, cia nws ua raws li kev ua raws li kev ua haujlwm zoo dua.
Cov nyhuv ntawm HPMC nyob ntawm cug ua haujlwm tuaj yeem yog ntaus nqi rau nws lub peev xwm los thicken thiab hloov cov rheology ntawm cov sib tov. Los ntawm kev nce viscosity ntawm kev sib tov, HPMC ua rau nws ntws tau zoo dua thiab txo qis ib qho kev nyiam los ntshav lossis ntshav. Txhim kho cov rhineology ntawm cov sib tov kuj tseem pab txo cov viscosity ntawm cov tshuaj khib, ua kom nws yooj yim dua ua haujlwm nrog.
2. Ua kom cov dej ua haujlwm
Dej ceev ceev yog ib qho ntawm cov khoom tseem ceeb tshaj plaws ntawm ntub cov tshuaj khib. Nws yog hais txog kev muaj peev xwm ntawm collch kom khaws dej ntev. Lub tshuaj khib xav tau cov dej tshuaj kom txaus kom nce lub zog thiab tiv thaiv shrinkage thiab tawg thaum ziab.
HPMC txhim kho cov dej ua kom ntub dej cug los ntawm kev tswj kom haum thiab tso dej hauv cov dej sib tov. Nws ua ib zaj duab xis nyias nyias ncig ntawm cov Maas hais tawm, tiv thaiv lawv los ntawm nqus dej ntau dhau thiab ua kom muaj kev sib xyaw sib xyaw. Zaj duab xis kuj tseem pab qeeb ntawm cov dej evaporation hauv kev sib xyaw, yog li txuas lub sijhawm ua haujlwm ntawm lub tshuaj khib.
3. Nce adhesion
Adhesion yog lub peev xwm ntawm cug cug rau kev sib khi thiab ua raws li lub substrate. Qhov no yog qhov tseem ceeb tshaj plaws hauv kev ua kom muaj kev tshuaj khib nyiab nyob rau hauv qhov chaw thiab tsis cais tawm ntawm cov npoo nws tau thov rau. HPMC txhim kho cov nplaum ntawm ntub kev tshuaj khib los ntawm kev loj hlob ntawm cov sib tov, yog li ua kom tau txoj kev sib xyaw nws txoj kev sib raug zoo.
HPMC ua tiav qhov no los ntawm kev sib sau ua yeeb yaj kiab nyias ib ncig ntawm cov Maas hais tawm, uas pab txhim kho cov kev tshuaj khib. Zaj duab xis tseem ua raws li kev thaiv, tiv thaiv kev tshuaj khib los ntawm kev sib cais los ntawm substrate. Txhim kho cov tshuaj cug adhesion txhim kho lub durability thiab kev ntseeg tau ntawm kev tsim kho.
Hauv kev xaus
Qhov kev sib xyaw ntawm HPMC kom ntub cov khoom lag luam muaj ntau cov txiaj ntsig zoo ntawm kev ua yeeb yam, ruaj khov thiab ua haujlwm ntawm kev sib xyaw. Nws txhim kho cov dej ua haujlwm, ua haujlwm thiab cov tshuaj nplaum, ua kom lub tshuaj khib ntau cohesive, yooj yim dua los daws thiab txhim khu kev qha. Cov khoom no ua HPMC ib qho tshuaj lom neeg tseem ceeb hauv ntub dej sib xyaw ua tshuaj cug ntau lawm.
Lub Sijhawm Post: Sep-15-2023