HPMC (HydroxyPropyyl methylulose) yog lub tsev tseem ceeb ntxiv thiab tau siv dav hauv kev sib nphoo ntawm tus kheej. Kev siv tus kheej txoj kev sib khib yog cov khoom siv nrog cov dej siab thiab muaj peev xwm siv tau rau hauv pem teb tsim kho kom ua kom du thiab tiaj tiaj. Hauv daim ntawv thov no, lub luag haujlwm ntawm HPMC yog qhov cuam tshuam hauv kev txhim kho kom haum rau lub fluent, dej khaws cia, cov nplaum thiab kev tsim kho ntawm lub tshuaj khib.
1. Cov yam ntxwv thiab kev siv hluav taws xob ntawm kev ua ntawm HPMC
HPMC yog cov neeg tsis-ionic cellulose ither nrog pab pawg hydroxyl thiab methoxy nyob rau hauv nws cov qauv molrecular, uas yog tsim los ntawm kev hloov qee yam hydrogen atoms hauv cellulose molecules. Nws cov khoom tseem ceeb suav nrog cov dej solubility zoo, thickening, dej khaws cia, lub peev xwm thiab qee qhov muaj peev xwm ua kom dav hauv cov ntaub ntawv hauv tsev.
Nyob rau hauv tus kheej-leveling cug, qhov cuam tshuam tseem ceeb ntawm HPMC suav nrog:
Thickening cov nyhuv: HPMC nce viscosity ntawm tus kheej-leveling cug los ntawm kev cuam tshuam nrog dej lwg me me los ua cov tshuaj colloidal. Qhov no pab tiv thaiv kev sib cais ntawm cov tshuaj khib nyiab thaum lub sijhawm kev tsim kho thiab ua kom muaj kev sib txawv ntawm cov khoom siv.
Dej khaws cia: HPMC muaj dej zoo heev ua tau zoo, uas tuaj yeem txo cov txheej txheem cug thiab txuas lub sij hawm ua haujlwm ntawm cug. Qhov no yog qhov tshwj xeeb tshaj yog ib qho tseem ceeb rau kev tshuaj khib tus kheej, vim tias cov dej nrawm nrawm yuav ua rau muaj kev sib tov sib xyaw lossis tsis sib thooj.
Flow Cov Kev Cai: HPMC kuj tseem tuaj yeem tswj cov nplaim zoo thiab muaj peev xwm tswj hwm tus kheej los ntawm kev tswj hwm kom zoo ntawm cov rheology ntawm cug. Qhov kev tswj hwm no tuaj yeem tiv thaiv lub tshuaj khib los ntawm kev siv ntshav siab dhau lossis ua kom muaj kev txhim kho kom tau zoo ntawm cov txheej txheem kev tsim kho.
Txhim Kho Kev Ua Haujlwm Zoo: HPMC tuaj yeem ua rau kev sib raug zoo ntawm tus kheej lub zog thiab ua kom muaj kev ua tiav zoo, txhim kho nws cov nplaum nplaum, thiab tsis txhob ua kom zoo, tawg thiab lwm yam teeb meem tom qab kev tsim kho.
2. Cov ntawv thov tshwj xeeb ntawm HPMC hauv kev sib txib ntawm tus kheej
2.1 Txhim kho cov kev tsim kho
Kev ua tus kheej txoj kev tshuaj khib feem ntau yuav tsum tau siv sijhawm ntev ntev thaum lub sijhawm kev tsim kho kom paub tseeb thiab muaj sijhawm. Cov dej khaws cia ntawm HPMC tuaj yeem txuas lub sijhawm pib cug, yog li txhim kho qhov yooj yim ntawm kev tsim kho. Tshwj xeeb tshaj yog nyob rau hauv cov chaw tsim khoom loj-cheeb tsam, cov neeg ua haujlwm tsim kho tuaj yeem muaj sijhawm ntau los kho thiab qib.
2.2 Txhim kho cug kab ke
Cov nyhuv tuab ntawm HPMC tsis tuaj yeem tiv thaiv kev sib cais ntawm cov tshuaj khib nyiab, tab sis kuj tseem txhim kho qhov kev ua tau zoo ntawm lub tshuaj khib. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txo cov khoom ntawm cov npuas ntawm cov npoo ntawm tus kheej txoj kab sib hloov thiab txhim kho saum npoo ntawm lub cug.
2.3 Txhim kho kev tawg
Thaum lub sij hawm tawv ntawm tus kheej txoj kev sib xyaw ua ke, kev nrawm nrawm ntawm cov dej yuav ua rau nws lub ntim rau kev ntsws, yog li ua kom tawg. HPMC tuaj yeem hloov kho kom qhuav ntawm cov ziab khaub ncaws cug thiab txo qhov tshwm sim ntawm shrinkage tawg los ntawm kev ua kom noo noo. Nyob rau tib lub sijhawm, nws qhov hloov tau yooj yim thiab cov nplaum kuj tseem pab txhim kho qhov tawg tawm ntawm cug.
3. Cov nyhuv ntawm HPMC Dosage ntawm Tshuaj Khov Kev Tshuaj Khib
Nyob rau hauv tus kheej-leveling cug, tus nqi HPMC ntxiv yuav tsum tau tswj hwm nruj. Feem ntau, tus nqi HPMC ntxiv yog nruab nrab ntawm 0.1% thiab 0.5%. Tus nqi ntawm HPMC tsim nyog txhim kho kom muaj kev tshuaj khib nyiab thiab dej rov qab ntawm cug, tab sis yog tias cov tshuaj cug, yog tias qhov kev siv tshuaj ntau dhau, nws yuav ua rau muaj cov teeb meem hauv qab no:
Tsawg dhau ntawm lub cev muaj zog: Ntau HPMC yuav txo cov tshuaj khib, cuam tshuam kev tsim kho kev tsim kho, thiab ua rau muaj peev xwm ua haujlwm rau tus kheej.
Kev ncua sij hawm ncua sij hawm: HPMC ntau dhau yuav txuas lub sij hawm cug thiab cuam tshuam rau kev tsim kho tom qab.
Yog li ntawd, hauv kev siv cov ntawv thov, nws yog qhov tsim nyog los kho cov tshuaj ntawm HPMC raws li tus kheej txoj kev sib xyaw ntawm tus kheej, qhov kub thiab lwm yam kev tsim kho zoo tshaj plaws.
4. Tus cawv ntawm txawv HPMC ntau yam nyob rau ntawm cug kev tshuaj khib
HPMC muaj ntau hom specifications. Hom sib txawv ntawm HPMC sib txawv ntawm HPMC sib txawv ntawm kev ua yeeb yam ntawm kev coj ua tus kheej thiab hnyav thiab hnyav dua. Feem ntau hais lus, HPMC nrog qhov hnyav hloov degree thiab lub siab muaj zog dua muaj zog dua thiab cov dej ua kom muaj zog dua thiab ua kom qeeb. HPMC nrog qhov qis qis degree thiab qis molecular hnyav disasterle sai dua thiab haum rau qee lub sijhawm uas yuav tsum muaj kev sib cais nrawm dua thiab lub sijhawm luv luv. Yog li ntawd, thaum xaiv HPMC, nws yog ib qho tsim nyog los xaiv cov uas tsim nyog ntau raws li cov kev tsim tshwj xeeb.
5. Kev cuam tshuam ntawm ib puag ncig ntawm kev ua haujlwm ntawm HPMC
Cov dej tuav thiab ua kom zoo rau HPMC yuav cuam tshuam los ntawm kev tsim kho chaw. Piv txwv li, hauv kev kub siab lossis cov av noo ib puag ncig, dej yaj ua kom sai, thiab cov dej ua kom ceev ceev ntawm HPMC tshwj xeeb tseem ceeb; Nyob rau hauv ib puag ncig huab cua, tus nqi HPMC yuav tsum tau ua kom muaj kev tshuaj khib ib yam nkaus. Yog li ntawd, hauv cov txheej txheem tsim qauv tiag tiag, tus nqi thiab hom HPMC yuav tsum tau hloov kho raws li cov kev mob ib puag ncig kom ntseeg tau tias qhov kev sib hloov tus kheej.
Raws li ib qho tseem ceeb uas tseem ceeb hauv kev sib xyaw ntawm tus kheej, HPMC tseem ceeb txhim kho cov tshuaj khib nyiab thiab cov dej ua kom tiav thiab kev hloov kho kom haum thiab kev hloov kho kom zoo dua. Txawm li cas los xij, hauv cov ntawv thov tiag tiag, yam ntxiv xws li tus nqi, ntau yam thiab kev tsim kho ib puag ncig ntawm HPMC yuav tsum tau nkag siab zoo kom tau txais cov nyhuv zoo tshaj plaws. Nrog kev nce qib nruam ntawm kev siv thev naus laus zis, daim ntawv thov ntawm HPMC hauv kev coj ua tus kheej tus kheej yuav dhau los ua kom muaj ntau thiab paub tab.
Lub Sijhawm Post: Sep-24-2024