Hydroxypropyl methylcellulose (HPMC) yog ib qho cellulose ether feem ntau siv los ua ib qho ntxiv hauv cov khoom siv cement. Nws cov khoom siv ntau yam ua rau nws muaj txiaj ntsig hauv ntau yam kev siv hauv kev tsim kho kev lag luam. Kev siv tseem ceeb ntawm HPMC hauv cement muaj xws li:
1. Kev tuav dej:
Kev Ua Haujlwm: HPMC ua tus neeg saib xyuas dej.
Qhov tseem ceeb: Nws tiv thaiv cov evaporation sai ntawm cov dej hauv cov cement sib tov, kom ntseeg tau tias muaj dej txaus rau hydration ntawm cov cement hais. Qhov no pab txhim kho kev ua haujlwm thiab tsim kom muaj zog thiab ruaj khov zaum kawg pob zeb lossis mortar.
2. Thickening thiab rheology tswj:
Muaj nuj nqi: HPMC ua raws li lub thickener thiab pab nyob rau hauv rheology tswj.
Qhov tseem ceeb: Los ntawm kev tswj cov viscosity ntawm cov cement sib tov, HPMC pab tiv thaiv kev sib cais thiab kev daws ntawm cov khoom siv. Nws txhim kho kev ua haujlwm thiab kev siv cov khoom ntawm cov khoom siv cement, ua rau lawv yooj yim dua.
3. Txhim kho adhesion:
Muaj nuj nqi: HPMC txhim kho adhesion.
Qhov tseem ceeb: Qhov sib ntxiv ntawm HPMC txhim kho qhov adhesion ntawm cov ntaub ntawv cementitious thiab ntau yam substrates. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov xws li pobzeb adhesives, qhov twg muaj zog adhesion yog ib qho tseem ceeb rau lub neej ntev thiab kev ua tau zoo ntawm cov pobzeb nto.
4. Teem sijhawm tswj:
Muaj nuj nqi: HPMC pab tswj lub sijhawm ua ntshav.
Qhov tseem ceeb: Nws yog ib qho tseem ceeb hauv kev tsim kho cov phiaj xwm los kho lub sijhawm teeb tsa kom tau raws li cov kev xav tau tshwj xeeb. HPMC tuaj yeem kho lub sijhawm teem sijhawm ntawm cov khoom siv cement, muab kev yooj yim rau ntau yam kev siv.
5. Txuas sijhawm qhib:
Muaj nuj nqi: HPMC txuas ntxiv cov sijhawm qhib.
Qhov tseem ceeb: Lub sijhawm qhib yog lub sijhawm uas cov khoom siv cement tseem siv tau tom qab kev tsim kho. HPMC tau txuas ntxiv lub sijhawm no los ua daim ntawv thov thiab hloov kho cov khoom siv yooj yim dua.
6. Kev ua haujlwm tawg:
Muaj nuj nqi: HPMC txhim khu kev tiv thaiv tawg.
Qhov tseem ceeb: Los ntawm kev ua kom yooj yim thiab adhesion ntawm cov cementitious matrix, HPMC pab txo qis qhov tshwm sim ntawm cov kab nrib pleb hauv cov khoom kho. Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo nyob rau hauv ib puag ncig qhov kub hloov pauv lossis kev txav ntawm cov qauv yuav tshwm sim.
7. Txo shrinkage:
Nws ua li cas: HPMC pab txo qis qis.
Qhov tseem ceeb: Shrinkage tuaj yeem ua rau tawg ntawm cov khoom siv cement. HPMC pab ua kom lub ntim ruaj khov dua thaum kho, txo qhov kev pheej hmoo ntawm cov teeb meem cuam tshuam txog kev poob qis.
8. Cement-raws li pobzeb nplaum:
Muaj nuj nqi: HPMC yog dav siv nyob rau hauv ceramic pobzeb adhesives.
Vim li cas nws tseem ceeb: Hauv cov ntawv nplaum nplaum nplaum, HPMC muab qhov tsim nyog adhesion, ua haujlwm tau thiab qhib lub sijhawm xav tau rau kev teeb tsa kom raug. Nws ua kom muaj kev sib raug zoo ntawm cov pobzeb thiab cov substrate.
9.Self-leveling underlayment:
Muaj nuj nqi: HPMC yog siv rau tus kheej-leveling underlayment.
Vim li cas nws tseem ceeb: Hauv kev tsim tus kheej-leveling, HPMC pab ua tiav cov yam ntxwv txaus nyiam thiab tiv thaiv kev sib cais thiab kev daws teeb meem. Nws pab tsim ib tug du thiab txawm nto.
10. Mortar thiab Plaster:
Lub hom phiaj: HPMC feem ntau ntxiv rau mortars thiab plasters.
Qhov tseem ceeb: HPMC txhim kho kev ua haujlwm, adhesion thiab tag nrho kev ua haujlwm ntawm mortars thiab plasters hauv plastering thiab tiav daim ntawv thov.
Kev siv hydroxypropyl methylcellulose hauv cov khoom siv cement yog manifold. Nws hais txog ntau yam teeb meem cuam tshuam nrog kev tsim, kev siv thiab kev ua haujlwm ntawm cov ntaub ntawv no, ua rau lawv hloov tau yooj yim dua thiab txhim khu kev qha hauv ntau hom kev tsim kho.
Post lub sij hawm: Dec-18-2023