Redispersible latex phofo le tse ling tse binders inorganic (tse kang samente, slaked lime, gypsum, joalo-joalo) le aggregates tse fapa-fapaneng, li-filler le li-additives tse ling (tse kang methyl hydroxypropyl cellulose ether, starch ether, lignocellulose, hydrophobic agent, joalo-joalo) bakeng sa ho kopanya 'mele. ho etsa seretse se kopantseng se ommeng.Ha seretse se omileng se kopantsoeng se eketsoa metsing 'me se tsosoa, likaroloana tsa phofo tsa latex li tla hasanngoa ka metsing tlas'a ketso ea hydrophilic protective colloid le mechanical shear.Nako e hlokahalang bakeng sa phofo e tloaelehileng ea latex e qhalakantsoeng e khutšoanyane haholo, 'me index ena ea nako ea redispersion e boetse e le parameter ea bohlokoa ho hlahloba boleng ba eona.Nakong ea pele ea ho kopanya, phofo ea latex e se e qalile ho ama rheology le ho sebetsa ha seretse.
Ka lebaka la litšobotsi tse fapaneng le liphetoho tsa phofo e 'ngoe le e' ngoe e arohaneng ea latex, phello ena e boetse e fapane, tse ling li na le phello e thusang ho phalla, 'me tse ling li na le phello e ntseng e eketseha ea thixotropy.Mokhoa oa ts'usumetso ea eona o tsoa likarolong tse ngata, ho kenyelletsa le tšusumetso ea phofo ea latex ka kamano ea metsi nakong ea ho hasana, tšusumetso ea viscosity e fapaneng ea phofo ea latex ka mor'a ho qhalakanngoa, tšusumetso ea colloid e sireletsang, le tšusumetso ea samente le mabanta a metsi.Litšusumetso li kenyelletsa ho eketseha ha moea ka har'a seretse le ho ajoa ha li-bubble tsa moea, hammoho le tšusumetso ea li-additives tsa eona le ho sebelisana le lisebelisoa tse ling.Ka hona, khetho e ikhethileng le e arohaneng ea phofo ea latex e ka sebelisoang hape ke mokhoa oa bohlokoa oa ho ama boleng ba sehlahisoa.Pono e tloaelehileng haholo ke hore phofo ea latex e redispersible hangata e eketsa moea oa seretse, ka tsela eo e tlotsa kaho ea seretse, 'me kamano le viscosity ea phofo ea latex, haholo-holo colloid e sireletsang, ho nosetsa ha e qhalakanngoa. Keketseho ea mahloriso e thusa ho ntlafatsa momahano oa seretse sa kaho, ka hona ho ntlafatsa ts'ebetso ea seretse.Ka mor'a moo, seretse se metsi se nang le phallo ea phofo ea latex se sebelisoa sebakeng sa mosebetsi.Ka phokotso ea metsi ka mekhahlelo e meraro - ho monya ha setsi sa motheo, ho sebelisoa ha samente hydration reaction, le volatilization ea metsi a holim'a moea moeeng, likaroloana tsa resin li ntse li atamela butle-butle, li-interfaces butle-butle li kopana, 'me qetellong li fetoha. filimi ea polymer e tsoelang pele.Ts'ebetso ena haholo-holo e hlaha ka li-pores tsa seretse le holim'a sepakapaka.
E lokela ho totobatsoa hore e le ho etsa hore ts'ebetso ena e se ke ea etsolloa, ke hore, ha filimi ea polymer e kopana le metsi hape, e ke ke ea qhalakanngoa hape, 'me colloid e sireletsang ea phofo ea latex e redispersible e tlameha ho arohana le tsamaiso ea filimi ea polymer.Sena ha se bothata tsamaisong ea seretse sa samente sa alkaline, hobane se tla silafatsoa ke alkaline e hlahisoang ke samente hydration, 'me ka nako e ts'oanang, adsorption ea lisebelisoa tse kang quartz e tla e arola butle-butle ho tloha tsamaisong, ntle le tšireletso ea hydrophilicity Colloids, e sa qhibiliheng ka metsing 'me e thehoa ke ho qhalakanngoa ha nako e le' ngoe ea phofo ea latex e ka sebelisoang hape, e ke ke ea sebetsa feela tlas'a maemo a omileng, empa hape le tlas'a maemo a nako e telele a ho qoelisoa metsing.Litsamaisong tse seng tsa alkaline, tse kang litsamaiso tsa gypsum kapa litsamaiso tse nang le li-fillers feela, ka lebaka le itseng, colloid e sireletsang e ntse e le teng ka mokhoa o itseng filiming ea ho qetela ea polymer, e amang ho hanyetsa metsi ha filimi, empa hobane litsamaiso tsena ha li sebelisoe. nyeoe ea ho qoelisoa ka nako e telele ka metsing, 'me polymer e ntse e e-na le thepa ea eona e ikhethang ea mechine, ha e ame ho sebelisoa ha phofo ea latex e ka sebelisoang hape lits'ebetsong tsena.
Ka ho thehoa ha filimi ea ho qetela ea polymer, tsamaiso ea moralo e entsoeng ka li-inorganic le li-organic binders e thehoa ka har'a seretse se phekotsoeng, ke hore, lisebelisoa tsa hydraulic li etsa moralo o brittle le o thata, 'me phofo ea latex e redispersible e etsa filimi pakeng tsa lekhalo le lekhalo. bokahodimo bo tiileng.Khokahano e feto-fetohang.Khokahano ea mofuta ona e ka nahanoa e amana le skeleton e thata ka liliba tse ngata tse nyane.Kaha matla a tsitsitseng a filimi ea resin ea polymer e entsoeng ke phofo ea latex hangata ke taelo ea boholo bo phahameng ho feta ea lisebelisoa tsa hydraulic, matla a seretse ka boeona a ka ntlafatsoa, ke hore, ho ka ntlafatsoa momahano.Kaha ho feto-fetoha ha maemo le ho senyeha ha polymer ho phahame haholo ho feta mohaho o thata o kang samente, ho senyeha ha seretse ho ntlafatsoa, 'me phello ea khatello ea kelello ea ho qhalakanya e ntlafatsoa haholo, kahoo e ntlafatsa ho hanyetsa ho phatloha ha seretse.
Nako ea poso: Mar-07-2023