HPMC, los yog Hydroxypropyl Methyl Cellulose, yog ntau yam khoom siv hauv tsev uas tau loj hlob nyob rau xyoo tas los no. Raws li cov cellulose derivative, HPMC muaj cov ntawv thov xws li tshuaj pleev ib ce rau cov nplaum, thiab qhov tshwj xeeb tshaj plaws, nws tau pom nws txoj hauv kev rau kev tsim kho kev lag luam ua cov thickener, nplaum, tiv thaiv colloid, emulsifier thiab stabilizer.
Kev tsim kho-qib HPMC yog cov khoom zoo, dej-soluble polymer siv nyob rau hauv ntau yam khoom cementitious nrog rau cov nplais nplaum, mortars, plasters, grouts, thiab sab nrauv rwb thaiv tsev thiab xov tshuab (EIFS). Nws cov khoom siv ntau yam ua rau nws yog qhov kev daws teeb meem zoo tshaj plaws rau ob qho kev tsim kho tshiab thiab kho dua tshiab, vim nws txhim kho kev sib raug zoo thiab kev sib koom ua ke ntawm ntau yam khoom siv.
Ib qho txiaj ntsig tseem ceeb ntawm HPMC yog nws cov khoom tuav dej zoo heev. Qhov no txhais tau hais tias nws tuaj yeem pab txo cov dej uas xav tau rau cov khoom siv cement uas tsis muaj kev cuam tshuam cov khoom lossis kev ua haujlwm ntawm kev sib xyaw. Los ntawm kev khaws cov dej noo, nws tiv thaiv qhov sib xyaw kom qhuav, pab txhim kho cov adhesion thiab lub zog ntawm cov khoom kawg.
Tsis tas li ntawd, HPMC ua raws li kev tiv thaiv colloid, pab txo qhov kev pheej hmoo ntawm kev sib cais, tawg thiab shrinkage hauv cov ntaub ntawv cementitious. Qhov no ua rau nws yog ib qho khoom siv zoo tshaj plaws rau cov khoom uas raug huab cua hnyav los yog xav tau los tiv thaiv kev ntxhov siab.
Ntxiv nrog rau cov khoom txhawb nqa kev ua tau zoo no, HPMC tau lees paub dav tias yog cov khoom siv ruaj khov heev. Ua los ntawm cov khoom siv txuas ntxiv dua tshiab, nws yog biodegradable thiab tsis muaj tshuaj lom, uas ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov neeg tsim khoom thiab cov tuam txhab tsim kho.
Raws li cov ntaub ntawv pov thawj ntawm nws cov kev ua tau zoo, HPMC kuj tseem siv rau hauv kev tsim cov khoom siv gypsum xws li stucco thiab sib koom ua ke. Nyob rau hauv rooj plaub no, HPMC pab txhim kho kev ua hauj lwm thiab sib xws ntawm cov khoom sib tov, thaum tseem ua kom muaj zog ntawm cov stucco thiab substrate.
Architectural qib HPMC muaj nyob rau hauv ntau yam viscosities thiab particle qhov ntau thiab tsawg, tso cai rau cov khoom kom haum raws li cov khoom yuav tsum tau. Qhov no ua rau nws yog cov khoom siv hloov tau yooj yim uas tuaj yeem siv rau ntau yam kev siv thiab ib puag ncig.
Hauv kev xaus, HPMC yog cov khoom tseem ceeb rau kev tsim kho kev lag luam thiab nws qhov zoo yog ntau yam. Nrog nws cov dej tuav zoo, kev tiv thaiv colloid thiab sustainability, nws yog ib qho khoom siv ntau yam thiab muaj txiaj ntsig ntxiv rau txhua yam khoom siv hauv tsev. Nws txhim kho kev ua tau zoo, txo cov khoom pov tseg thiab yog qhov zoo tshaj plaws rau cov neeg tsim khoom thiab cov tuam txhab tsim kho ib puag ncig. Kev siv HPMC yog qhov ci ntsa iab rau yav tom ntej ntawm kev tsim kho kev lag luam.
Post lub sij hawm: Lub Xya hli ntuj-11-2023