Hauv kev tsim khoom thiab cov ntawv siv ntawm cov c tov tov ua ke, hydroxypropyl cellulose (HPMC), ua ib qho tseem ceeb ntxiv, ua ib qho tseem ceeb tshaj plaws. Nws yog cov khoom siv tshuaj lom neeg nrog kev ua tau zoo thiab dav kev hloov kho tau tias tuaj yeem txhim kho kev ua tau zoo ntawm kev sib xyaw ua kom qhuav, ua rau nws muaj kev sib tw ntau hauv kev tsim kho.
1. Dej Tuav Kev Ua Haujlwm
Ib qho ntawm qhov tseem ceeb tshaj plaws ntawm HPMC yog nws cov khoom siv dej zoo. Nyob rau hauv qhuav-mix cug, noo noo khaws yog ib qho ntawm cov ntsiab lus tseem ceeb. Kev poob dej ntau dhau yuav ua rau muaj teeb meem xws li kev tawg thiab tsis muaj zog ntawm lub tshuaj khib. Los ntawm nws cov dej ua haujlwm zoo, HPMC tuaj yeem ua cov dej ua si ruaj khov sab hauv lub tshuaj khib, yog li tiv thaiv dej los ntawm kev tiv thaiv kom sai. Qhov no tsis yog txuas ntxiv lub sijhawm ua haujlwm ntawm lub cug, tab sis kuj tseem ua kom muaj zog txaus ntawm cov cement, txhim kho lub zog thiab tsev ua haujlwm ntawm cov qoob loo tiav.
2. Txhim kho kev tsim kho kev tsim kho
HPMC muaj peev xwm txhim kho kev tsim kho cov tshuaj khib nyiab uas qhuav, tshwj xeeb tshaj yog cov txwv ntawm fluidity thiab lubricity. Rau cov neeg ua haujlwm thaum lub sijhawm tsim kho, cov nqaij thiab lub cev ntawm cultad txiav txim siab kom yooj yim thiab ua haujlwm zoo ntawm kev tsim kho. Qhov kev sib txuas ntawm HPMC ua rau cov tshuaj khib yooj yim rau do thiab smoother thaum thov thiab pw, txo cov neeg ua haujlwm tiv thaiv lub sijhawm ua haujlwm. Cov yam ntxwv no tshwj xeeb yog tsim nyog rau cov plastering phab ntsa, npuas pob zeb thiab lwm yam kev siv uas xav tau kev tsim kho kev tsim kho kom tsim nyog.
3. Txhim kho Sag Kuj
HPMC tau zoo heev ntawm kev txhim kho cov sag kam ntawm cug. Thaum qhuav-mixed collation yog thov mus rau ntsug phab ntsa lossis qab, nws yog feem ntau yuav tsum daws qhov teeb meem ntawm sagging lossis swb vim txoj kev sib tsoo ntawm lub cug lwv nws tus kheej. Los ntawm nws viscosity tshwj xeeb muaj nuj nqi, HPMC tuaj yeem nce viscosity ntawm cug tshuaj tua, yog li ua kom tau zoo nws adcesion thiab zoo tsis txhob sagging. Qhov no yog qhov tseem ceeb tshaj plaws kom ntseeg tau tias lub tshuaj khib yog qhovyees tau thov thiab ua kom muaj kev tsim kho zoo kawg.
4. Txhim Kho Lub Zog Bonding
Lwm qhov tseem ceeb ntawm HPMC hauv kev sib txig sib xyaw qhuav yog txhawm rau txhim kho lub zog bonding. Hauv kev tsim kho, txoj kev sib txuas ua haujlwm ntawm cap ncaj ncaj cuam tshuam rau qhov kev ruaj ntseg thiab kev tsim kho ntawm kev tsim kho. HPMC tuaj yeem txhim kho txoj hlua khi ntawm cug thiab substrate los ntawm nws cov qauv molecular, tshwj xeeb tshaj yog nyob rau hauv cov khoom nplaum thiab cov tshuab rwb thaiv tsev. Qhov kev txhim kho no muaj txiaj ntsig ntawm HPMC tshwj xeeb yog pom tseeb. Qhov txiaj ntsig no ua kom pom tseeb tias lub tshuaj khib yog ua ke rau ntau cov khoom siv tom qab kev tsim kho, txo cov teeb meem xws li kev ua haujlwm thiab tawg.
5. Txhim kho khov-thaw tsis kam
Nyob rau hauv huab cua txias heev, tshuaj khib ntsej muag qhov kev sib tw ntawm khov thiab yaj tau mus. Rov ua kom khov thiab yaj hauv qhov chaw ib puag ncig no yuav ua rau lub cug ua kom tawg thiab tev, yog li cuam tshuam lub tsev ua haujlwm ruaj khov. Los ntawm nws cov dej zoo kom ua tau zoo thiab cov nyhuv txhawb, HPMC tuaj yeem txo cov roj cug, thiab txuas ntxiv lub neej pabcuam ntawm lub tsev.
6. Txhim kho kev tawg thiab shrinkage khoom
Qhuav-mix cug yog nquag mus tawg thiab shrinkage thaum lub sij hawm kho cov txheej txheem ntawm dej lossis kev ntxhov siab sab hauv tau tsim thaum lub sij hawm kho. HPMC muaj peev xwm zam tau cov teeb meem no. Nws tsis tuaj yeem tsuas yog qeeb qeeb poob los ntawm nws cov dej khaws cia, tab sis kuj ua ib qho txheej txheem dab neeg los txo cov kev ntxhov siab sab hauv thiab txo qhov tshwm sim ntawm kev tawg. Qhov no ua rau HPMC ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv cov tshuaj khib tawg hauv cov theem tom qab kev tsim kho thiab tswj cov khoom siv ua tau zoo.
7. Txhim kho lub compressive compressive thiab tensile lub zog
HPMC kuj tseem tuaj yeem txhim kho cov khoom siv cov khoom siv ntawm cov khoom sib xyaw qhuav, tshwj xeeb tshaj yog lub zog compressive thiab tensile lub zog. Nws txhim kho lub zog tag nrho ntawm cov khoom los ntawm kev txhim kho cov cohesion ntawm lub cug kom muaj lub zog siab yam tsis muaj kev cuam tshuam thaum cuam tshuam los ntawm cov rog sab nraud. Qhov kev txhim kho no hauv kev ua tau zoo yog tshwj xeeb yog qhov tshwj xeeb rau kev tsim tsev lossis cov chaw tsim kho nrog cov kev xav tau siab.
8. Dav yooj yim
Cov tshuaj lom neeg ruaj khov thiab huab cua tiv thaiv ntawm HPMC ua kom nws ua tau zoo nyob hauv ntau yam ib puag ncig. Txawm hais tias nws yog siab lossis qis dua lossis qis dua kub, noo lossis qhuav huab cua kev nyab xeeb, HPMC tuaj yeem tswj hwm nws cov kev ua tau zoo. Qhov no ua rau nws dav siv hauv kev tsim kho hauv kev sib txawv huab cua thoob ntiaj teb. Tsis tas li ntawd, HPMC tau sib xws nrog ntau lwm cov ntaub ntawv muaj lwm yam tshuaj, ntxiv rau cov ntaub ntawv rwb thaiv tsev, riddard, thiab lwm yam.
9. Kev tiv thaiv ib puag ncig thiab kev noj qab haus huv
Raws li cov tsis muaj tshuaj lom thiab tsis muaj mob cellulose derivative, HPMC ua raws li cov qauv ib puag ncig thiab tsis muaj kev cuam tshuam rau tib neeg kev noj qab haus huv. Piv nrog tsoos tshuaj cais cov tshuaj sib xyaw, HPMC tsis tsim cov teeb meem roj lossis cov khib nyiab thaum kev tsim khoom, kev tsim kho thiab siv, txo cov pa phem ib puag ncig. Yog li ntawd, HPMC tsis yog ua tau raws li cov kev xav tau ntawm cov tsev tshiab tshiab, tab sis kuj tseem yoog raws li cov kev tiv thaiv niaj hnub ntawm kev txhawj xeeb rau kev tiv thaiv ib puag ncig thiab kev noj qab haus huv.
10. Kev Lag Luam
Txawm hais tias tus nqi HPMC nws tus kheej ntxiv rau qhuav-sib nphua cug me me, nws ho txhim kho qhov kev ua tau zoo ntawm lub tshuaj khib. Los ntawm kev ntxiv HPMC, tus nqi ntawm lwm cov tshuaj muaj dej ntau dua tuaj yeem raug kho kom zoo, thiab cov khoom siv tau zoo dua qub tuaj yeem hloov kho, thiab rov ua haujlwm dua. Xav txog cov nqi tsim thiab siv cov txiaj ntsig kev nkag siab, HPMC muaj qhov tseeb kev lag luam zoo.
Txoj kev thov thoob plaws HPMC hauv cov tshuaj cug qhuav los ntawm nws cov dej ua kom zoo, cov nplaum, kev ua haujlwm thiab tawg ua haujlwm tsis kam. Cov khoom siv no tsis tuaj yeem tsim kho cov khoom siv lub cev ntawm cov khoom siv qhuav, tab sis kuj txhim kho cov khoom tsim kho thiab siv tau txo kev tsim kho thiab tus nqi. Yog li ntawd, raws li ntau-ua haujlwm ntxiv, HPMC tau dhau los ua qhov tsis tseem ceeb thiab cov khoom tseem ceeb hauv kev txhim kho thiab kev tsim kho tshiab ntawm cov tsev tsim tsev tshiab. Nyob rau hauv lub neej yav tom ntej, nrog kev txhim kho txuas ntxiv ntawm cov kev tsim nyog ntawm cov kev tsim nyog, daim ntawv thov kev cia siab ntawm HPMC hauv cov collhle qhuav-sib xyaw.
Lub Sijhawm Post: Feb-17-2025