MHEC (Methyl Hydroxyethyl Cellulose) yog lwm cov cellulose-raws li polymer uas feem ntau siv los ua ib qho ntxiv hauv kev siv cement-based rendering. Nws muaj qhov zoo sib xws rau HPMC, tab sis muaj qee qhov sib txawv ntawm cov khoom. Cov hauv qab no yog cov ntawv thov ntawm MHEC hauv cementitious plasters:
Kev tuav dej: MHEC ua kom cov dej khaws cia hauv plastering sib tov, yog li ua kom lub sijhawm ua haujlwm ntev. Nws pab tiv thaiv qhov sib tov los ntawm kev ziab ntxov ntxov, cia sijhawm txaus rau daim ntawv thov thiab ua tiav.
Kev ua haujlwm tau zoo: MHEC txhim kho kev ua haujlwm thiab kev sib kis ntawm cov ntaub ntawv plastering. Nws txhim kho cohesion thiab ntws cov khoom, ua kom yooj yim rau kev thov thiab ua tiav qhov tiav ntawm qhov chaw.
Adhesion: MHEC txhawb nqa zoo adhesion ntawm plaster rau substrate. Nws pab kom muaj kev sib raug zoo ntawm plaster thiab hauv qab, txo qhov kev pheej hmoo ntawm delamination lossis sib cais.
Sag Resistance: MHEC imparts thixotropy rau cov plaster sib tov, txhim kho nws cov kev tiv thaiv rau sag los yog slump thaum thov vertically los yog overhead. Nws pab tswj cov thickness thiab cov duab ntawm lub plaster thaum thov.
Crack resistance: Los ntawm kev ntxiv MHEC, cov khoom siv plastering tau yooj yim dua thiab yog li txhim kho kev tawg. Nws pab txo qhov tshwm sim ntawm cov kab nrib pleb tshwm sim los ntawm kev ziab shrinkage lossis thermal expansion / contraction.
Durability: MHEC pab txhawb rau lub zog ntawm lub plastering system. Nws tsim cov yeeb yaj kiab tiv thaiv thaum qhuav, ua rau muaj kev tiv thaiv dej nkag, huab cua thiab lwm yam hauv ib puag ncig.
Rheology Control: MHEC ua raws li kev hloov kho rheology, cuam tshuam rau kev khiav thiab kev ua haujlwm ntawm kev sib xyaw ua ke. Nws pab tswj cov viscosity, txhim kho cov twj tso kua mis lossis txau cov yam ntxwv, thiab tiv thaiv kev sib cais lossis sib cais ntawm cov khoom sib cais.
Nws yuav tsum raug sau tseg tias qhov tshwj xeeb thiab kev xaiv ntawm MHEC tuaj yeem sib txawv raws li cov kev cai tshwj xeeb ntawm cov txheej txheem plastering, xws li cov thickness yuav tsum tau, kho cov mob thiab lwm yam. Cov neeg tsim khoom feem ntau muab cov lus qhia thiab cov ntaub ntawv qhia txog kev pom zoo rau qib kev siv thiab cov lus qhia rau kev koom ua ke MHEC rau hauv cementitious gypsum formulations.
Post lub sij hawm: Jun-08-2023