Yiziphi izimpushana ze-latex ezihlakazeka kabusha?

I-Redispersible latex powder (RLP), eyaziwa nangokuthi i-redispersible polymer powder (RPP), iyimpushana egeleza mahhala, ehlakazeka emanzini etholwe ngokufafaza-komisa i-polymer latex emulsion. Iqukethe izinhlayiya ze-polymer, ngokuvamile ezinesakhiwo segobolondo eliyinhloko, kanye nezithasiselo ezihlukahlukene ezifana nama-colloid avikelayo, ama-plasticizers, ama-disperants, nama-anti-foaming agents. I-RLP iklanyelwe ukuthuthukisa ukusebenza kanye nezakhiwo zezinto zikasimende, okuhlanganisa izinto zokunamathisela, udaka, ama-renders, nama-coatings, ngokuthuthukisa ukunamathela, ukuguquguquka, ukumelana kwamanzi, ukusebenza, nokuqina.

Inqubo yokukhiqiza i-latex powder ehlakazeka kabusha ibandakanya izinyathelo ezimbalwa:

1. Ukukhiqizwa Kwe-Polymer Emulsion: Inqubo iqala ngokukhiqizwa kwe-emulsion ye-polymer ngokwenza i-polymerization yama-monomers afana ne-vinyl acetate, i-ethylene, i-acrylic esters, noma i-styrene-butadiene phambi kwama-surfactants, ama-emulsifiers, nama-stabilizers. Ukusabela kwe-emulsion polymerization ngokuvamile kwenziwa emanzini ngaphansi kwezimo ezilawulwayo ukuze kukhiqizwe ukuhlakazeka kwe-latex okuzinzile.
2. I-Spray Drying: I-emulsion ye-polymer ibe ingaphansi kokumiswa kwesifutho, inqubo lapho i-emulsion iguqulwa ibe amaconsi amahle futhi ifakwe emfudlaneni womoya oshisayo ngaphakathi kwegumbi lokumisa. Ukuhwamuka okusheshayo kwamanzi emaconsini kuholela ekwakhekeni kwezinhlayiya eziqinile, eziqoqwe njengempushana eyomile ngaphansi kwegumbi lokumisa. Ngesikhathi sokumiswa kwesifutho, izithasiselo ezifana nama-colloid avikelayo nama-plasticizers zingase zifakwe ezinhlayiyeni ze-polymer ukuze kuthuthukiswe ukuzinza nokusebenza kwazo.
3. I-Particle Surface Treatment: Ngemva kokumiswa kwesifutho, i-latex powder ehlakazeka kabusha ingase yelashwe phezulu ukuze iguqule izakhiwo zayo nezici zokusebenza. Ukwelashwa okungaphezulu kungase kuhilele ukusetshenziswa kwezingubo ezengeziwe noma ukufakwa kwezithasiselo ezisebenzayo ukuze kuthuthukiswe ukunamathela, ukumelana namanzi, noma ukuhambisana nezinye izingxenye ekwakhiweni kukasimende.
4. Ukupakisha Nokugcina: Impushana yokugcina ye-latex ehlakazeka kabusha ipakishwa ezikhwameni noma ezitsheni ezikwazi ukumelana nomswakama ukuze ivikeleke kumswakama nokungcoliswa kwemvelo. Izimo ezifanele zokupakisha nokugcina zibalulekile ukuze kugcinwe izinga kanye nokuzinza kwempushana ngokuhamba kwesikhathi.

Impushana ye-latex ehlakazeka kabusha ivamise ukuba mhlophe noma kungabikho mhlophe ngombala futhi inokusabalalisa usayizi wezinhlayiyana ezinhle, kusukela kuma-micrometer ambalwa kuya kumashumi ama-micrometer. Ihlakazeka kalula emanzini ukuze yenze ama-emulsions azinzile noma ama-dispersions, angafakwa kalula ekwakhiweni kwe-cementitious ngesikhathi sokuxuba nokusebenzisa. I-RLP isetshenziswa kabanzi embonini yezokwakha njengesengezo esiguquguqukayo sokuthuthukisa ukusebenza, ukusebenza, nokuqina kwezinto zokwakha ezahlukahlukene kanye nokufakwa.