Iyini impushana ye-latex ehlakazeka kabusha?

Isinyathelo sokuqala sokukhiqiza impushana ye-polymer ehlakazeka kabusha ukukhiqiza i-polymer dispersion, eyaziwa nangokuthi i-emulsion noma i-latex. Kule nqubo, ama-monomers afakwe emanzini (aqiniswe ama-emulsifiers noma ama-macromolecular protective colloids) asabela nabaqalisi ukuze baqalise i-emulsion polymerization. Ngalokhu kusabela, ama-monomers axhunyaniswa ukuze akhe ama-molecule amaketanga amade (ama-macromolecules), Okungukuthi ama-polymers. Phakathi nalokhu kusabela, amaconsi e-emulsion e-monomer ashintsha abe yizinhlayiya ze-polymer "eziqinile". Kulawo ma-emulsions e-polymer, iziqinisi endaweni yezinhlayiyana kufanele zivimbele i-latex nganoma iyiphi indlela ukuhlangana futhi ngaleyo ndlela iphazamise. Ingxube ibe isilungiselelwa ukomiswa ngokufutha ngokungeza izithasiselo ezihlukene, futhi ukwengezwa kwama-colloid avikelayo kanye nama-anti-caking agents kuvumela i-polymer ukuba yakhe impushana egelezayo engasakazwa kabusha emanzini ngemva kokumiswa kwesifutho.

Impushana ye-latex ehlakazeka kabusha isatshalaliswa odakeni lwempushana eyomile exutshwe kahle. Ngemva kokuba udaka luxutshwe namanzi, i-polymer powder iphinde ihlakazwe ku-slurry esanda kuxutshwa futhi ifakwe emulsified futhi; ngenxa ye-hydration ye-cement, i-evaporation ebusweni kanye / noma ukumuncwa kwe-base layer, ama-pores angaphakathi akhululekile Ukusetshenziswa kwamanzi okuqhubekayo kwenza izinhlayiya ze-latex zome ukuze zenze ifilimu eqhubekayo engenamanzi emanzini. Le filimu eqhubekayo yakhiwa ukuhlanganiswa kwezinhlayiya ezihlakazekile ezilodwa ku-emulsion zibe umzimba ofanayo. Ukuze unike amandla impushana ye-latex ehlakazeka kabusha ukuze yakhe ifilimu odakeni oluqinile, kufanele kuqinisekiswe ukuthi izinga lokushisa elincane lokwakhiwa kwefilimu liphansi kunezinga lokushisa lokuphulukisa likadaka oluguquliwe.

Ukuma kwezinhlayiyana zempushana ye-polymer ehlakazeka kabusha kanye nezakhiwo zayo zokwenza ifilimu ngemva kokuhlakazeka kabusha kwenza kube nokwenzeka ukuba nemiphumela elandelayo ekusebenzeni kodaka esimweni esisha nesiqinile:

1. Ukusebenza odakeni olusha

◆ “Umphumela wokugcoba” wezinhlayiya wenza ingxube yodaka ibe noketshezi oluhle, ukuze kutholwe ukusebenza okungcono kokwakhiwa.

◆ Umphumela wokungenisa umoya wenza udaka lucindezeleke, kwenze ukudonsa kube lula.

◆ Ukwengeza izinhlobo ezahlukene zempushana ye-latex ehlakazeka kabusha kungathola udaka oluguquliwe ngepulasitiki engcono noma i-viscous eyengeziwe.

2. Ukusebenza odakeni oluqinile

◆ Ifilimu ye-latex ingakwazi ukuvala imifantu encipha ku-base-mortar interface futhi ipholise imifantu eshwabene.

◆ Thuthukisa ukuvaleleka kodaka.

◆ Thuthukisa amandla okubumbana odaka: ukuba khona kwezifunda ze-polymer eziguquguquka kakhulu nezinwebeka kakhulu kuthuthukisa ukuguquguquka nokunwebeka kodaka,

Ihlinzeka ngokuziphatha okuhambisanayo nokushintshayo kwamathambo aqinile. Lapho kusetshenziswa amandla, ngenxa yokuguquguquka okuthuthukisiwe nokunwebeka kwe

Ama-Microcracks abambezeleka kuze kufinyelelwe ukucindezeleka okuphezulu.

◆ Izizinda ze-polymer ezihlanganisiwe ziphinde zivimbele ukuhlangana kwama-microcracks emifantwini engena. Ngakho-ke, i-polymer powder ehlakazeka kabusha ithuthukisa ukucindezelwa kokuhluleka kanye nokwehluleka kokusebenza kwezinto.

Kuyadingeka ukwengeza impushana ye-latex ehlakazeka kabusha ekomeni usimende, ngoba i-latex powder ehlakazeka kabusha inezinzuzo eziyisithupha ezilandelayo, futhi okulandelayo yisingeniso sakho.

1. Thuthukisa amandla okubopha nokubumbana

Impushana ye-latex ehlakazeka kabusha idlala indima enkulu ekuthuthukiseni amandla okubopha nokuhlangana kwezinto. Ngenxa yokungena kwezinhlayiya ze-polymer kuma-pores kanye nama-capillaries we-samente matrix, ukubumbana okuhle kwakhiwa ngemuva kokufakwa kwe-hydration ne-cement. I-polymer resin ngokwayo inezici ezinhle kakhulu. Isebenza kangcono ekuthuthukiseni ukunamathela kwemikhiqizo yodaka lukasimende kuma-substrates, ikakhulukazi ukunamathela okungalungile kwezibophezelo ze-inorganic ezifana usimende kuma-organic substrates afana nokhuni, i-fiber, i-PVC, ne-EPS.

2. Thuthukisa ukuzinza kweqhwa futhi uvimbele ngempumelelo ukuqhekeka kwezinto

Impushana ye-latex ehlakazeka kabusha, ipulasitiki yeresin yayo ye-thermoplastic ingawunqoba umonakalo odalwe ukwanda okushisayo kanye nokufinyela kwempahla yodaka lukasimende okubangelwa umehluko wokushisa. Ukunqoba izici ze-shrinkage enkulu eyomile kanye nokuqhekeka kalula kodaka olulula lukasimende, kungenza izinto eziguquguqukayo, ngaleyo ndlela kuthuthukiswe ukuzinza kwesikhathi eside kwezinto.

3. Thuthukisa ukugoba nokumelana nokuqina

Kuhlaka lwamathambo oluqinile olwakhiwe ngemva kokuba udaka lukasimende lufakwe amanzi, ulwelwesi lwe-polymer luyanwebeka futhi luqinile, futhi lusebenza njengelunga elinyakazayo phakathi kwezinhlayiya zodaka lukasimende, ezingamelana nemithwalo ephezulu yokuguquguquka futhi inciphise ukucindezeleka. Ukwenyuka kokuqina nokugoba.

4. Thuthukisa ukumelana nomthelela

I-latex powder ehlakazeka kabusha iyinhlaka ye-thermoplastic. Ifilimu ethambile eboshwe phezu kwezinhlayiya zodaka ingakwazi ukumunca umthelela wamandla angaphandle futhi iphumule ngaphandle kokuphuka, ngaleyo ndlela ithuthukise ukumelana komthelela wodaka.

5. Thuthukisa i-hydrophobicity futhi unciphise ukumuncwa kwamanzi

Ukwengeza i-cocoa redispersible polymer powder kungathuthukisa i-microstructure yodaka lukasimende. I-polymer yayo yakha inethiwekhi engenakuhlehliswa phakathi nenqubo ye-cement hydration, ivala i-capillary kujeli ye-cement, ivimbele ukungena kwamanzi, futhi ithuthukise ukungakwazi ukungena.

6. Thuthukisa ukumelana nokugqoka kanye nokuqina

Ukwengeza impushana ye-latex ehlakazeka kabusha kungakhuphula ukuhlangana phakathi kwezinhlayiya zodaka lukasimende nefilimu ye-polymer. Ukuthuthukiswa kwamandla ahlangene ngokufanayo kuthuthukisa ikhono ledaka ukuze limelane nengcindezi yokugunda, kunciphisa izinga lokuguga, kuthuthukisa ukumelana nokuguga, futhi kwandise impilo yesevisi yodaka.