Kev pleev xim yog ib txoj hauv kev thoob ntiaj teb los tiv thaiv cov tuam tsev thiab cov qauv ntawm cov huab cua cuam tshuam xws li lub hnub, cua, kub hloov pauv, nag lossis daus. Cov txheej pleev xim rau muaj kev thauj khoom loj heev los ntawm cov xwm txheej teev tseg. Txhawm rau xav txog qhov ntsuas ntawm qhov cuam tshuam ntawm huab cua puag ncig, nws yog qhov txaus kom nco qab cov laj thawj ntawm kev puas tsuaj ntawm roob thiab tsim cov qhov tsua. Qhov no kuj muaj pov thawj los ntawm qhov tseeb tias lub hnub yog qhov ua rau swaying ntawm Eiffel Ntauwd…
Kev xaiv xim yog ib kauj ruam tseem ceeb hauv kev pleev xim. Tom qab tag nrho, ntau yam nyob ntawm nws qhov zoo. Nws tseem ceeb heev uas yuav tsum nco ntsoov tias txawm tias koj xaiv xim dab tsi, koj yuav tsis tau txais 100% kev tiv thaiv. Thiab yog tus tswv hais tias lwm yam, ces koj yuav zoo dua nrhiav lwm tus tswv. Txawm li cas los xij, qhov zoo dua ntawm cov txheej txheej, cov xim pleev xim yuav ntev dua. Nws yog qhov zoo tshaj plaws los yuav cov xim hauv ib lub khw tshwj xeeb. Txawm tias tus nqi siab dua, koj yuav pov hwm koj tus kheej tawm tsam tus cuav.
Yog li koj tab tom pleev xim tsev. Yuav xaiv xim dab tsi? Yog tias koj lub tsev tsis yog ntoo, ces qhov kev xaiv zoo tshaj plaws yogxim av. Nws qhov sib txawv ntawm cov tshuaj ib txwm muaj yog tias cov khoom tiav no muaj ob lub ntsiab lus tsis sib xws: globules (cov xim me tshaj plaws) thiab cov emulsifier (cov kua uas cov globules yaj). Ntawd yog, hauv cov ntsiab lus, cov xim dej dispersion yog ib qho emulsion, cov khoom uas, tom qab sib tov, dhau mus rau hauv lub xeev tshem tawm. Yog li ntawd, cov xim yuav tsum tau shaken ua ntej siv thiab nplawm ib ntus thaum ua haujlwm. Lub hauv paus ntsiab lus ntawm kev ua haujlwm yog tias thaum siv rau saum npoo, emulsifier nkag mus rau hauv cov tshuaj tiv thaiv nrog huab cua; Yog li ntawd, cov dej tso tawm tuaj rau saum npoo thiab evaporates; Lub resulting pob tshab zaj duab xis ntawm lub emulsifier tseem nyob rau ntawm qhov chaw, nyob rau hauv uas xim hais tias tusyees nyob. Nyob ntawm cov xim ntawm cov khoom, cov xim pleev xim rau ntawm cov xim sib xws tau txais.
Dej-dispersion xim muaj ob hom:
1) Polyvinyl acetate - qhov xav tau tshaj plaws. Ntxiv nrog rau cov khoom siv dej tsis zoo, cov xim dej-dispersion no muaj qhov zoo adhesion rau cov pob zeb thiab cov cement. Koj tuaj yeem npog nws nrog tsob ntoo, tab sis nws tsis xav tau (vim li cas - saib hauv qab).
2) Acrylate dej-dispersion - cov xim no yog tus cwj pwm los ntawm huab cua tsis kam. Raws li txoj cai, nws yog siv rau tha xim lub facades ntawm lub tsev, nrog rau cov chaw nrog high humidity. Nws siv tso cai rau kev ua tiav cov tsev zoo heev. Tsis haum rau qhov chaw ntoo.
Dej-dispersion, dej-raws li cov xim muaj tib lub hom phiaj. Nws tuaj yeem npog cov pob zeb thiab cov cement. Tab sis nws yog qhov zoo dua tsis txhob npog cov hlau thiab ntoo nrog nws. Thaum pleev xim rau cov qauv ntoo, cov xim daj tuaj yeem tshwm sim - qhov tseeb vim yog qhov adhesion zoo heev rau tsob ntoo. Nyob rau hauv cov hlau, dej-dispersion xim, tus nqi ntawm uas yog heev tsawg, tsis tuav zoo heev, peels tawm thiab crumbles nyob rau hauv ib tug luv luv lub sij hawm.
