Nws yooj yim heev kom tsis meej pem rau ntau hom khoom nyob rau hauv kev ua lag luam rau lub tsev, tag nrho cov muag muag hais tias nws yog cov xim tha xim sab hauv uas zoo tshaj plaws. Tab sis tom qab ntawd nws hloov tawm tias lawv tag tsis sib haum rau cov ntawv sau, txi dej los ntawm dej los yog muaj ib qho tsis hnov qab tsis hnov tsw. Yog li no, ntawm no peb sau cov feem ntau ntawm cov qauv siv dyes rau sab hauv kho kom zoo nkauj, yog li tus neeg yuav khoom tsis poob hauv lub khw thaum mus yuav cov khoom kom zoo rau lub sijhawm ntawm kev kho tsev ntau.
Vim li cas cov xim yog muab faib ua ntau hom?
Thaum peb thov cov lus ntawm cov xim tha xim, peb muab cov thinnest zaj duab xis uas muaj peb yam khoom. Lawv feem ntau cuam tshuam txog cov tseem ceeb ntawm cov xim tha xim sab hauv. Thawj yam khoom uas yog tus neeg tuaj yeem ua tus ntaiv tom qab siv cov khoom siv rau lub qab nthab, rooj tog lossis phab ntsa. Qhov thib ob yog lub pigment lub luag hauj lwm rau cov xim. Tshaj thib peb, uas yog ib txwm muaj nyob rau hauv cov xim, yog ib phau ntawv uas tso cai rau cov nplua nuj ntawm cov xim pleev kom tawm mus rau qhov chaw. Hauv kev txheeb xyuas no, peb yuav muab cov xim pleev xim rau hauv cov tsiaj txhu nyob ntawm seb lub substrate.
Hom xim tha xim sab hauv:
- Roj pleev xim.
- Dej xim raws li PVA.
- Acrylic dej raws cov xim tsev.
- Alkyd Enamel.
- Cov xim tom qab.
Cov khoom zoo li no yog tsim los ntawm cov roj ziab, thaum nws tsis muaj cov neeg sib tw thiab tau nrov heev. Cov xim nrawm ntev heev, qhov txheej "tsis ua pa" thiab ntev mus muab tawm ib qho tsis txaus siab. Yuav tsum muaj qhov ua ntej txhua qhov kev tu vaj tse, yog tias cov duab zoo nkauj tuaj yeem yuav o tuaj. Tus nqi ntawm roj cov ntaub ntawv yog txaus nyiam heev. Tsis tas li ntawd, cov roj carbonyl formulations muaj kev ruaj ntseg rau kev noj qab haus huv, muaj cov khoom noj tsawg tsawg, lawv nkag mus rau hauv ntoo thiab muaj kev tiv thaiv zoo rau chemistry.
Lub hauv paus ntawm tag nrho cov dej-dispersed compounds yog dej huv, uas ua rau lawv txaus nyiam rau kev ua tiav tsev. Polyvinyl acetate formulations yog cov uas pheej yig tshaj plaws. Muaj, ob qho tib si matte thiab glossy sab hauv xim dej. Thov siv cov khoom lag luam no thiab cov khoom lag luam zoo heev rau kev kho ntawm cov phab ntsa uas ua los ntawm cov ntoo plasterboard thiab ntoo, plasters, cov khoom ntxeem tau.
Nws tsis pom zoo kom pleev xim rau cov khoom siv nrog cov khoom hlau thiab lub ntsej muag glossy. Qhov thib ob drawback ntawm no xim tha xim sab nrauv yog cov dej tsis ruaj, vim qhov no nws raug nquahu kom siv rau kev kho cov phab ntsa thiab qab nthab tshwj xeeb tshaj tawm hauv cov chav qhuav.
Dej kuj yog ib qho tsis haum, tab sis polyacrylates (polymers ntawm methyl, ethyl thiab butyl acrylates) tsim ib zaj yeeb yaj kiab. Fresh compounds yog yooj yim tshem tawm, tab sis tom qab ziab, lub zoo nkauj txheej yog tsis ntshai ntawm ntub tu. Tseem, peb nco ntsoov tias chav dej thiab chav ua noj yog tsim nyog nrhiav lwm xim.
Hauv kev tsim cov khoom zoo li no, alkyd varnishes ntawm ob hom yog siv: glyptal thiab pentaphthalic, thiab kuj yog cov organic hnyav. Cov dej sib tov no tso cai rau koj kom tau tom qab tha xim thaij xim zoo nkauj thiab zoo nkauj, nws pom zoo kom siv, ob leeg ua haujlwm sab hauv thiab nyob ntawm txoj kev. Ntxuav tau alkali sab hauv xim tsis muaj kev kub ntxhov, nws tsis hnav, nws yog qhov qub
Cov khoom zoo nkauj yav dhau los yog cov khoom sib txawv. Muaj cov dej-dispersion latex xim tsev thiab cov xim acrylic-yas dej-dispersion. Acrylate cov ntaub ntawv yog me ntsis kim kim, tab sis zoo dua, xws li tha xim tha xim sab nraud rau chav ua mov, kev kho cov phab ntsa thiab ceilings hauv txoj kev hauv tsev los yog chav dej.