HydroxyPropyyl methylcellose (HPMC) yog lub cellulose ether feem ntau siv nyob rau hauv ntau yam kev lag luam, suav nrog gypsum hauv kev tsim kho kev tsim kho. Qhov kev sib xyaw ua ke no tau ua tiav lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo thiab cov yam ntxwv ntawm Gypsum Plaster.
1. Taw qhia HPMC:
HydroxyPropyyl methylulose yog hluavtaws derivative ntawm lub ntuj polymer cellulose. Nws yog tsim los ntawm kev kho cellulose nrog cov tshuaj pleev cov arelene oxide thiab methyl chloride. Qhov tshwm sim yog dej-soluble polymer nrog cov khoom muaj txiaj ntsig uas tuaj yeem pom cov ntawv thov hauv ntau yam kev lag luam.
2. Kev ua haujlwm ntawm HPMC:
Dej solubility: HPMC yog yooj yim soluble hauv dej, ua ib pob tshab thiab tsis muaj kob.
Zaj duab xis-ua cov khoom: Zaj duab xis ua cov khoom pab tau ua daim duab tiv thaiv ntawm cov npoo.
Thermal Gelation: HPMC Undergoes Reversible Thermal fermal gelation, uas txhais tau tias nws tuaj yeem tsim cov gel thaum kub siab thiab rov qab los daws qhov txias.
Viscosity: viscos ntawm HPMC kev daws teeb meem tuaj yeem hloov kho raws cov degree hloov chaw thiab hnyav hnyav.
3. Daim Ntawv Thov HPMC hauv Gypsum:
Dej khaws cia: HPMC ua raws li dej tswj kav dej hauv Gypsum, tiv thaiv kom tsis txhob dej sai sai thaum lub sijhawm teeb tsa. Qhov no ua kom tau txais kev ua kom tau txais txiaj ntsig thiab muab cov ntawv thov ntev dua.
Txhim kho adhesion: kev ua yeeb yaj kiab ua yeeb yaj kiab ntawm HPMC pab txhim kho stucco nplaum rau ntau yam ntawm cov substrates, tsim kom muaj zog sib haum.
Kev tswj sib xws: los ntawm kev tswj lub viscosity ntawm gypsum sib tov, hpmc pab tswj cov ntawv thov kom sib xws, kom muaj kev sib xws.
Nthuav tawm tiv thaiv: Siv hpmc hauv plaster pab txhim kho kom haum thiab txo cov kev sib tsoo ntawm cov khoom tiav hauv cov khoom tiav.
Lub sijhawm teem sijhawm: HPMC tuaj yeem cuam tshuam lub sijhawm teeb tsa ntawm Gypsum yog li nws tuaj yeem hloov kho kom tau raws li cov cai thov.
4. Qosage thiab sib xyaw:
Tus nqi HPMC siv hauv Gypsum nyob ntawm ntau yam ntawm cov khoom xav tau xws li cov khoom xav tau, Gypsum tsim thiab cov cai yuav tsum tau ua. Feem ntau, nws yog ntxiv rau cov sib tov qhuav thaum lub sij hawm sib xyaw. Kev sib xyaw ua ke yog qhov tseem ceeb kom ntseeg tau tias kev sib cais thiab kev ua tau zoo tshaj plaws.
5.puility thiab kev nyab xeeb:
HPMC tau sib txuam nrog ntau yam ntxiv uas siv hauv plaster formated. Ntxiv rau, nws yog suav tias yog muaj kev nyab xeeb rau siv hauv cov ntaub ntawv tsim tsev thiab ua raws li cov qauv kev tswj hwm muaj feem xyuam.
6. Xaus:
HydroxyPropyyl methylcellulose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm Gypsum Plaster. Nws cov khoom tshwj xeeb tau pab txhim kho kev ua haujlwm, adhesion thiab txhua yam zoo ntawm plaster. Ib qho kev siv dav ntxiv hauv kev tsim kho kev tsim kho, HPMC tseem yog ib qho tseem ceeb ntawm cov qauv zoo ntawm plaster.
Lub Sijhawm Post: Jan-19-2024