HPMC (HydroxyPropyyl methylcellulose) yog ib qho tseem ceeb ntxiv siv nyob rau hauv cov ntaub ntawv hauv tsev xws li ua hmoov txhuas, thiab lwm yam khoom noj, dej tuav, thiab txhim kho kev tsim kho. Hauv kev tsim cov hmoov nplej, ntxiv rau HPMC tsis tuaj yeem txhim kho nws cov khoom tsim kho, tiv thaiv kom tau zoo ntev dhau thaum kev tsim kho, thiab cuam tshuam rau cov nyhuv kev tsim kho.
1. Xaiv tus qauv HPMC yog
Kev ua tau zoo ntawm HPMC yog ze ze rau nws cov molecular hnyav, hydroxypropal hloov, methyl hloov chaw thiab lwm yam. Txhawm rau txhim kho cov dej khaws cia ntawm putty hmoov, thawj xaiv ib tus qauv HPMC tsim nyog.
Siab viscosity HPMC: HPMC nrog cov qauv roj ntau dua tuaj yeem ua tus qauv siv hluav taws xob muaj zog ntawm cov khoom siv ua kom muaj zog. Feem ntau, HPMC nrog cov viscosity ntau dua yuav muaj qhov cuam tshuam zoo rau kev ua kom muaj peev xwm ua kom muaj peev xwm.
Cov qib kev ua kom tsim nyog hloov chaw: Tus hydroxypropny hloov chaw thiab methyl hloov ntawm HPMC cuam tshuam rau nws cov solubility thiab dej retiving muaj peev xwm. A higher degree of hydroxypropyl substitution helps to improve the hydrophilicity of HPMC, thereby enhancing its water retention performance.
Raws li cov cai ntawm cov hmoov putty, xaiv cov qauv HPMC muaj peev xwm txhim kho cov dej khaws cia hauv cov khoom lag luam.
2. Nce tus nqi HPMC ntxiv
Txhawm rau txhawm rau txhim kho cov dej khaws cia ntawm cov hmoov putty, tus nqi HPMC ntxiv tuaj yeem nce ntxiv. Los ntawm kev nce qib ntawm HPMC, nws faib tawm hauv Putty tuaj yeem txhim kho thiab nws lub peev xwm hauv dej yuav ua tau zoo.
Qhov nce nyob rau hauv tus nqi ntawm ntxiv kuj tseem yuav ua rau muaj kev nce ntxiv hauv viscosity ntawm putty hmoov. Yog li ntawd, nws yog ib qho tsim nyog yuav kom ntseeg tau tias cov dej zoo khaws cia thaum tsis txhob muaj viscosity ntau heev los cuam tshuam kev ua haujlwm.
3. Tsim Tsim Tsim Tsim Tsim
Cov qauv tsim qauv ntawm kev ua hmoov rau static ncaj qha cuam tshuam nws cov dej khaws cia. Ntxiv rau HPMC, kev xaiv ntawm lwm yam hauv cov mis (xws li fillers, cov nplaum, thiab lwm yam).
Fineeness thiab thaj chaw tshwj xeeb: qhov loj me thiab thaj chaw tshwj xeeb ntawmTus muab tub lim rau hauv cov hmoov puTty yuav cuam tshuam rau kev kos cov dej. Cov hmoov zoo thiab cov fillers nrog thaj chaw muaj peev xwm tshwj xeeb tuaj yeem ua tau dej zoo dua thiab txo qis dej. Yog li ntawd, kev xaiv tsim nyog ntawm cov neeg ua haujlwm particle loj yog qhov tseem ceeb hauv kev txhim kho cov dej khaws cia.
Kev xaiv cov hmoov xis mas muaj cov cement thiab lwm yam khoom xyaw, cov dej cawv ntawm cov cement yuav noj ib co dej. Yog li ntawd, nws yog qhov tsim nyog los ua kom zoo rau cov dej khaws cia ntawm putty ntawm kev kho cov piv ntawm cov cement muab tub lim.
4. Tswj cov txheej txheem sib xyaw
Cov txheej txheem sib xyaw kuj tseem muaj qee qhov cuam tshuam rau cov dej khaws cia ntawm cov hmoov putty. Kev sib xyaw ua ke tsim nyog tuaj yeem pab HPMC tag nrho thiab sib tov tusyees nrog lwm cov khoom xyaw kom tsis txhob muaj kev sib txawv hauv kev sib tw hauv kev sib tw.
Tsim nyog sib xyaw ua ke thiab nrawm: yog lub sijhawm sib xyaw ua luv heev, HPMC yuav cuam tshuam nws cov dej kom ua tau zoo. Yog tias kev sib xyaw ua ke dhau heev, huab cua ntau dhau yuav tuaj yeem qhia, cuam tshuam rau qhov zoo ntawm cov hmoov muaj zaub mov. Yog li ntawd, kev tswj kom tsim nyog
5. Tswj ib puag ncig cov av noo thiab kub
Cov dej khaws cia ntawm cov hmoov putty tsis tsuas yog cuam tshuam nrog cov ntaub ntawv raw thiab cov mis, tab sis kuj tseem muaj feem cuam tshuam nrog cov av noo thiab qhov kub ntawm cov chaw tsim kho. Nyob rau hauv ib puag ncig nrog kub kub thiab qis avity, noo noo ntawm putty hmoov yog ib qho yooj yim dhau mus sai thiab cuam tshuam rau cov nyhuv kev tsim kho.
Thaum lub sij hawm tsim qauv, tsim nyog kub thiab vaum mob yuav tsum tau tswj kom ntau li ntau tau los tiv thaiv cov hmoov puty los ntawm kev poob dej sai heev. Kev tswj kom zoo ntawm qhov kub cua sov thiab cov av noo kuj tseem tuaj yeem txhim kho cov dej khaws cia ntawm cov hmoov putty.
6. Ntxiv Dej Tuav Tus Neeg Sawv Cev
Ntxiv rau HPMC, lwm cov dej tswjfwm ntxiv kuj tseem tuaj yeem ua ntxiv rau cov hmoov av, txuas ntxiv rau lub sijhawm tsim kho, thiab tiv thaiv kom tsis txhob muaj qhov ziab thiab tawg sai sai.
Txawm li cas los xij, thaum ntxiv dej los tuav cov neeg sawv cev, nws yog ib qho tsim nyog los ua tib zoo saib xyuas lawv li kev sib raug zoo nrog HPMC kom paub meej tias tsis muaj kev cuam tshuam nrog kev tsim kho ntawm putty.
7. Siv cov av noo tswj tshuab
Hauv qee lub sijhawm tshwj xeeb, cov huab cua huab cua huab cua siv tau los txhim kho cov dej khaws cia ntawm cov hmoov putty. Piv txwv li, kev siv dej raws li kev siv cov hmoov av lossis cov khoom ntub ntawm cov khoom siv ntub dej, ua kom muaj kev sib zog ua ke, yog li txuas nws lub sijhawm tsim kho thiab txhim kho dej rov qab.
Dej khaws cia ntawm putty hmoov tuaj yeem hloov kho kom zoo los ntawm xaiv hom kev cai ntawmHPMC, Ua kom cov nyiaj ntxiv, txhim kho cov qauv, txhim kho cov txheej txheem sib xyaw, tswj cov av noo thiab kub ntawm kev tsim kho kom zoo, thiab lwm yam kev ntsuas. Raws li ib qho tseem ceeb ntawm cov hmoov putty, kev txhim kho ntawm cov dej tuav tseg ntawm HPMC tsis tuaj yeem txhim kho qhov kev tsim kho zaum kawg thiab txo qhov tsis xws luag thiab teeb meem hauv kev tsim kho. Yog li, kev nkag siab thiab fastering cov hau kev no los txhim kho cov dej rov qab yog qhov tseem ceeb ua rau cov lag luam uas tsim thiab siv cov hmoov ua kom zoo.
Lub sij hawm ncua: Lub sijhawm 20-2025