HydroxyPropyyl methylcellueculose (HPMC) yog qhov ntau ntxiv siv dav siv hauv kev tsim kho kev tsim kho, tshwj xeeb hauv plaster formated. Gypsum plaster, tseem hu ua plaster ntawm Paris, yog cov khoom siv nrov tau siv los ua cov tsho tiv thaiv phab ntsa thiab nthab. HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov kev ua tau zoo thiab kev ua tau zoo ntawm gypsum plaster.
HPMC yog cov neeg tsis-ionic cellulose ether tau los ntawm cov polymer cellulose los ntawm cov tshuaj lom neeg cov tshuaj lom neeg. Nws yog tsim los ntawm kev kho cellulose nrog cov tshuaj pleev cov tshuaj pleev thiab methyl chloride. Cov khoom ua tau zoo yog cov hmoov dawb uas yog soluble hauv dej thiab ua cov tshuaj pleev pob tshab.
Nov yog qee qhov tseem ceeb ntawm HPMC rau plaster:
1. Dej khaws cia:
Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC hauv Gypsum yog nws cov dej-tuav peev. Nws pab tiv thaiv kom tsis txhob noo noo thaum lub txheej txheem ua kom qhuav, tso cai rau kev tswj hwm ntau thiab txawm tias kev teeb tsa plaster. Qhov no yog qhov tseem ceeb kom ua tiav qhov xav tau lub zog thiab sib xws ntawm plaster.
2. Txhim kho cov txheej txheem:
HPMC txhim kho kev ua haujlwm ntawm gypsum plaster los ntawm kev muab lub sijhawm qhib zoo dua thiab nce ntxiv ntawm daim ntaub tsis kam. Qhov no ua rau nws yooj yim rau kev thov thiab tshaj tawm cov stucco hla saum npoo, ua rau hauv smoother, ntau dua.
3. Adhesion thiab Cohesion:
HPMC AIDS hauv cov nplaum ntawm gypsum plaster mus rau ntau substrates. Nws txhim kho cov nplaum ntawm stucco thiab pib hauv qab npoo, kom ua tiav qhov ntev-ntev thiab ruaj. Ib qho ntxiv, HPMC txhim kho cov cohesion ntawm plaster nws tus kheej, yog li nce lub zog thiab txo kev tawg.
4. Thickening nyhuv:
Hauv Gypsum cov qauv, HPMC ua raws li cov tuab tuab, cuam tshuam cov viscosity ntawm gypsum sib xyaw. Qhov no thickening nyhuv yog qhov tseem ceeb rau kev ua tiav qhov xav tau yam thiab kev ntxhib los mos thaum thov. Nws kuj tseem pab tiv thaiv kom txhob muaj qhov txawv txav ntawm sagging lossis tsaus muag ntawm qhov chaw ntsug.
5. Teeb sijhawm tswj:
Tswj lub sijhawm teeb tsa ntawm Gypsum plaster yog qhov tseem ceeb hauv kev ua vajtsev kos duab. HPMC tuaj yeem kho lub sijhawm teem caij kom muab qhov hloov kom haum kom tau raws li kev xav tau tshwj xeeb. Qhov no yog qhov tshwj xeeb tshaj yog rau cov haujlwm loj uas yuav xav tau chaw teeb tsa chaw sib txawv.
6. Nyeg rau Porosity:
Lub xub ntiag ntawm HPMC cuam tshuam lub porosity ntawm gypsum. Tsim kom zoo plaster nrog HPMC tuaj yeem nce ntxiv rau cov dej nkag mus thiab txo cov porosity, yog li ua kom muaj zog nyob rau ib puag ncig.
7. Kev sib xyaw nrog lwm cov khoom sib ntxiv:
HPMC tau sib txuam nrog ntau yam ntawm lwm yam ntxiv siv hauv gypsum tsim qauv. Cov versatility no tso cai plaster sib xyaw ua kom tau customized kom tau raws li tau raws li cov qauv kev kawm thiab cov cai thov.
8. Kev txiav txim siab ib puag ncig:
HPMC yog feem ntau suav hais tias muaj kev nyab xeeb thiab ib puag ncig phooj ywg. Nws tsis yog-lom thiab tsis tso cov tshuaj ua kom muaj kev phom sij thaum lossis tom qab plastering. Qhov no yeej ua tau nrog kev loj hlob tseem ceeb ntawm kev ua haujlwm ruaj khov thiab hauv eco hauv tsev.
HydroxyPropyyl methylcellose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm Gypsum hauv kev siv kev siv. Nws cov dej khaws cia, kev txhim kho kev ua haujlwm, kev txiav txim siab rau lub porosity, kev tswj hwm lub sijhawm ua rau nws muaj txiaj ntsig zoo ntxiv rau hauv cov zoo gypsum. Raws li kev tsim kho cov kev tsim kho txuas ntxiv zuj zus, HPMC tseem yog cov khoom xyaw cuam tshuam rau hauv kev txhim kho cov kev ua tau zoo thiab ruaj khov ntawm ntau yam ntawm lub tsev thiab cov haujlwm tsim kho.
Lub Sijhawm Post: Jan-22-2024