HydroxyPropyyl methylulose (HPMC) yog ib feem siv dej-soluble polymer sib xyaw ua ke, siv ntau yam li kev tsim kho, tsho loj thiab khoom noj. Nws yog cov khoom lag luam tau los ntawm kev siv tshuaj lom neeg (xws li methylation thiab hydroxyproper) ntawm ntuj cog solubulation, thiab muaj cov dej solubility, thiab muaj cov khoom siv viscosification, emulsification thiab zaj duab xis-tsim cov khoom. Hauv Gypsum tshuaj khib, hpmc feem ntau ua lub luag haujlwm ntawm thickening, uas tuaj yeem txhim kho kev ua haujlwm thiab lub zog kawg ntawm lub tshuaj khib.
1. Thickening nyhuv
Hauv Gypsum tshuaj khib, hpmc, ua cov tuab dua, tuaj yeem ua pa viscosity ntawm cov tshuaj khib. Lub fluidity ntawm gypsum tshuaj yog ib qho tseem ceeb cuam tshuam rau cov khoom siv ua tau zoo. Tsawg dhau ntawm cov nplaim dej tsawg yuav ua rau nws nyuaj rau kev siv tshuaj khib tusyees, tuaj yeem ua rau cov kev sib khib gypsum kom ntws tsis ruaj khov lossis tsis ruaj khov thaum lub sijhawm ua ntawv thov. Lub thickening nyhuv ntawm HPMC tuaj yeem hloov kho kom zoo ntawm lub tshuaj khib, yog li ntawd cov tshuaj khib nyiab yuav tsis dhau los yog tuab heev thaum txhim kho kev txhim kho ntawm kev tsim kho.
2. Dej khaws cia
Cov dej khaws cov nyhuv ceev ntawm HPMC hauv Gypsum tshuaj khib yog qhov tseem ceeb tshaj. Gypsum tshuaj khib muaj qee qhov nqi ntawm cov dej. Dej nrawm nrawm yuav ua teeb meem xws li kev tawg thiab shrinkage nyob rau saum npoo ntawm cug tshuaj, yog li cuam tshuam cov kev tsim kho thiab cov nyhuv kawg. Raws li cov polymer compound, HPMC muaj muaj zog hydrophilicity. Nws tuaj yeem khi dej hauv cov tshuaj khib nyiab hauv kev sib txuas lus ntawm cov dej hauv kev sib txuam, ua kom lub xeev tsim nyog thaum lub sijhawm tsim kho. Cov nyhuv tswj kav cov dej no yuav tsis tsuas yog tiv thaiv kev tsim cov kab nrib pleb, tab sis kuj txhawb kom cov kev sib tsoo ntawm lub zog ntawm lub cug.
3. Txhim Kho Kev Ua Haujlwm
Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho qhov ua haujlwm ntawm kev ua haujlwm ntawm gypsum tshuaj khib. Kev ua haujlwm zoo txhais tau tias lub tshuaj khib yog yooj yim los thov thiab du thaum lub sijhawm tsim kho, thiab tuaj yeem tswj tau lub siab ntev. HPMC tuaj yeem hloov kho kom qhuav ntawm lub tshuaj khib nyiab los ntawm cov dej khov thiab ua haujlwm kom ntev li tsis txaus siab viscosity thiab tawg thaum lub sijhawm tsim kho. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho cov cinoindness, ua rau nws smoother rau cov neeg ua haujlwm hloov cug thiab txo kev siv cug thiab txo kev siv cug
4. Txhim kho txoj kev sib sau ntawm cug
HPMC tseem tuaj yeem txhim kho txoj kev ua tau zoo ntawm gypsum tshuaj khib. Thaum lub sij hawm tsim kho, gypsum tshuaj ntsiav yuav tsum tau ua ib daim ntawv cog lus zoo nrog lub substrate saum npoo los xyuas kom meej nws cov nplaum ruaj. HPMC tuaj yeem tsim ib qho kev sib txuas nrog lwm yam hauv cov qauv mydroxy, thiab yog li txhawb txoj kev sib khi ntawm lub tshuaj khib. Tshwj xeeb tshaj yog qee cov ntaub ntawv tshwj xeeb (xws li iav, ceramics, hlau, thiab lwm yam), HPMC tuaj yeem txhim kho txoj kev tshuaj khib gypsum thiab tiv thaiv kom tsis txhob poob.
5. Txhim kho kev tawg
Qhov tawg tsis kam ntawm gypsum tshuaj khib nyiab yog qhov tseem ceeb thaum nws siv, tshwj xeeb hauv teeb meem loj ntawm nws lub neej thiab tsos. Qhov kev sib txuas ntawm HPMC tuaj yeem txo qis cov cua sov ntawm cov dej thiab txo cov qhov tshuaj khib nyiab hauv gypsum hauv kev pheej hmoo ntawm cov kev pheej hmoo ntawm cov kab nrib pleb nrawm heev. Tsis tas li ntawd, HPMC molecule nws tus kheej muaj qee yam elasticity thiab yas, uas tuaj yeem txhim kho cov kab cug ua paug ntawm cov capt.
6. Txhim kho cov dej tsis kam ntawm gypsum tshuaj khib
Hauv qee qhov chaw noo noo lossis dej ntws-hnyav, gypsum tshuaj yuav tsum muaj cov dej tsis kam. Qhov kev sib txuas ntawm HPMC tuaj yeem txhim kho lub cug lub peev xwm tiv taus dej raus thiab txo qis kev puas tsuaj rau ntawm cov qauv tshuaj khib. HPMC muaj cov dej khov kho thiab zoo hydrophobicity, uas txhim kho cov dej tsis kam ntawm cug cug rau ib qho thiab txo cov khoom nthuav dav thiab nws los ntawm cov dej intrusion.
7. Txhim kho lub zog kawg ntawm lub tshuaj khib
Lub zog kawg ntawm Gypsum tshuaj khib feem ntau yog feem ntau cuam tshuam nrog cov khoom noj coaszent thiab cov dej evaporation. HPMC txhawb nqa cov kev tawm tsam hydr Nyob rau tib lub sijhawm, cov qauv molecular ntawm HPMC kuj tseem tuaj yeem ntxiv dag zog rau cov qauv tshuaj khib, thiab yog li txhim kho cov qauv kev sib xyaw ua ke xws li compression thiab khoov.
8. Kev tiv thaiv ib puag ncig thiab kev lag luam
Txij li thaum HPMC yog lub ntuj cog cellulose derivative, nws cov khoom siv ru khoom noj yog muaj ntau thiab txuas ntxiv dua, uas tau raws li kev tiv thaiv ntawm kev tiv thaiv niaj hnub thiab kev txhim kho kom ruaj khov. Ib qho ntxiv, raws li kev ua haujlwm ntxiv, HPMC feem ntau yog siv rau hauv cov nyiaj tsawg, tab sis nws tuaj yeem txhim kho cov tshuaj khib. Yog li ntawd, ntxiv hpmc mus rau gypsum tshuaj khib yog kev lag luam thiab siv tau zoo los txhim kho kev ua tshuaj cug.
Lub luag haujlwm ntawm HPMC hauv Gypsum kev sib khib tsis tuaj yeem tsis quav ntsej. HPMC tuaj yeem txhim kho kev ua tau zoo thiab siv cov nyhuv ntawm gypsum tshuaj khib nyiab los ntawm thickening, txhim kho kev ua haujlwm, txhim kho kev ua haujlwm, tawg tawm thiab dej tsis kam. Tshwj xeeb tshaj yog nyob rau hauv kev ntsuas loj thiab ib puag ncig tshwj xeeb, qhov sib ntxiv ntawm HPMC muaj qhov tseem ceeb ua tau siv tseem ceeb. Nrog rau kev txhim kho txuas ntxiv ntawm kev ua tau zoo ntawm cov ntaub ntawv, HPMC, raws li kev ua haujlwm tseem ceeb ntxiv, yuav yog siv ntau dua hauv kev sib khib gypsum.
Lub Sijhawm Post: Feb-19-2025