Cov hmoov txhuv nplej siab ether feem ntau yog siv rau hauv cov tshuaj khib nyiab, uas tuaj yeem cuam tshuam rau qhov sib xws ntawm cov tshuaj khib nyiab raws li gypsum, cement thiab lime, thiab hloov pauv kev tsim kho thiab kev tiv thaiv sag ntawm cov tshuaj khib nyiab. Cov hmoov txhuv nplej siab ethers feem ntau yog siv ua ke nrog cov cellulose ethers uas tsis hloov kho thiab hloov kho. Nws yog qhov tsim nyog rau ob qho tib si nruab nrab thiab alkaline systems, thiab sib xws nrog feem ntau cov khoom ntxiv hauv gypsum thiab cov khoom cement (xws li surfactants, MC, hmoov txhuv nplej siab thiab polyvinyl acetate thiab lwm yam polymers uas yaj hauv dej).
Cov yam ntxwv tseem ceeb:
(1) Starch ether feem ntau yog siv ua ke nrog methyl cellulose ether, uas qhia tau tias muaj kev sib koom tes zoo ntawm ob qho tib si. Ntxiv cov starch ether kom tsim nyog rau methyl cellulose ether tuaj yeem txhim kho qhov kev tiv thaiv sag thiab kev tiv thaiv plam ntawm cov mortar, nrog rau cov txiaj ntsig zoo.
(2) Ntxiv cov hmoov txhuv nplej siab ether rau hauv cov mortar uas muaj methyl cellulose ether tuaj yeem ua rau kom cov mortar sib xws thiab txhim kho qhov fluidity, ua rau kev tsim kho du thiab khawb du.
(3) Ntxiv cov hmoov txhuv nplej siab ether rau hauv cov mortar uas muaj methyl cellulose ether tuaj yeem ua rau cov dej khaws cia ntawm cov mortar thiab ua kom lub sijhawm qhib ntev dua.
(4) Starch ether yog cov tshuaj hloov pauv starch ether uas yaj hauv dej, sib xws nrog lwm cov khoom ntxiv hauv cov hmoov qhuav mortar, siv dav hauv cov nplaum pobzeb, kho mortar, plaster plaster, sab hauv thiab sab nraud phab ntsa putty, gypsum-based embedded Joints thiab cov ntaub ntawv sau, cov neeg sawv cev interface, masonry mortar.
Cov yam ntxwv ntawm cov hmoov txhuv nplej siab feem ntau yog nyob rau hauv: (a) txhim kho kev tiv thaiv sag; (b) txhim kho kev ua haujlwm; (c) txhim kho tus nqi khaws dej ntawm cov mortar.
Ntau yam kev siv:
Cov hmoov txhuv nplej siab ether yog qhov tsim nyog rau txhua yam (cement, gypsum, lime-calcium) sab hauv thiab sab nraud phab ntsa putty, thiab txhua yam ntawm lub ntsej muag mortar thiab plastering mortar.
Nws siv tau ua cov tshuaj sib xyaw rau cov khoom siv cement, cov khoom siv gypsum thiab cov khoom siv lime-calcium. Starch ether muaj kev sib raug zoo nrog lwm yam kev tsim kho thiab cov tshuaj sib xyaw; nws yog qhov tshwj xeeb tshaj yog rau kev tsim kho qhuav sib xyaw xws li mortar, adhesives, plastering thiab dov cov ntaub ntawv. Starch ethers thiab methyl cellulose ethers (Tylose MC qib) siv ua ke hauv kev tsim kho qhuav sib xyaw kom muab cov tuab dua, cov qauv muaj zog dua, tiv taus sag thiab yooj yim ntawm kev tuav. Lub viscosity ntawm mortars, adhesives, plasters thiab yob renders uas muaj cov methyl cellulose ethers siab dua tuaj yeem txo los ntawm kev ntxiv cov starch ethers.
Lub sijhawm tshaj tawm: Lub Rau Hli-13-2023