Dispersible polymer powder le tse ling tse inorganic adhesives (jwalo ka samente, slaked lime, gypsum, letsopa, joalo-joalo) le aggregates tse fapa-fapaneng, li-fillers le li-additives tse ling [tse kang hydroxypropyl methylcellulose, polysaccharide (starch ether), fiber Fiber, joalo-joalo. e tsoakiloeng ho etsa seretse se kopantseng se ommeng.Ha seretse sa phofo se omeletseng se eketsoa metsing 'me se tsosoa, tlas'a ketso ea hydrophilic protective colloid le matla a ho kuta ka mechine, likaroloana tsa phofo tsa latex li ka qhalakanngoa ka potlako metsing, e leng ho lekaneng ho etsa hore phofo ea latex e hlahisoe ka botlalo.Sebopeho sa phofo ea rabara se fapane, se nang le tšusumetso ho rheology ea seretse le thepa e sa tšoaneng ea kaho: kamano ea phofo ea latex bakeng sa metsi ha e qhalakanngoa hape, viscosity e fapaneng ea phofo ea latex ka mor'a ho hasana, phello ho moea oa seretse le ho ajoa ha li-bubble, Tšebelisano pakeng tsa phofo ea rabara le li-additives tse ling li etsa hore phofo e fapaneng ea latex e be le mesebetsi ea ho eketsa metsi, ho eketsa thixotropy, le ho eketsa viscosity.
Ka kakaretso ho lumeloa hore mokhoa oo ka oona phofshoana ea morao-rao ea latex e ntlafatsang ho sebetsa ha seretse se secha ke hore phofo ea latex, haholo-holo colloid e sireletsang, e na le kamano ea metsi ha e qhalakanngoa, e leng ho eketsang viscosity ea slurry le ho ntlafatsa ho kopana ha metsi. seretse sa kaho.
Kamora hore seretse se secha se nang le phallo ea phofo ea latex se thehoe, ka ho monya metsi ka holim'a botlaaseng, ts'ebeliso ea hydration reaction, le ho fetoha ha moea moeeng, metsi a fokotseha butle-butle, likaroloana tsa resin li ntse li atamela butle-butle, sebopeho butle-butle sea fifala. , 'me resin e kopana butle-butle.qetellong e entsoe ka polymer ka filimi.Mokhoa oa ho etsa filimi ea polymer e arotsoe ka mekhahlelo e meraro.Mokhahlelong oa pele, likaroloana tsa polymer li tsamaea ka bolokolohi ka mokhoa oa ho sisinyeha ha Brownian ho emulsion ea pele.Ha metsi a fetoha mouoane, ho tsamaea ha likaroloana ka tlhaho ho thibetsoe haholoanyane, 'me tsitsipano ea sefahleho pakeng tsa metsi le moea e etsa hore butle-butle li tsamaisane hammoho.Mokhahlelong oa bobeli, ha likaroloana li qala ho kopana, metsi a marang-rang a fetoha mouoane ka capillary, 'me tsitsipano e phahameng ea capillary e sebelisoang holim'a likaroloana e etsa hore ho be le deformation ea likarolo tsa latex ho etsa hore li kopane hammoho,' metsi a setseng a tlatsa li-pores, 'me filimi e batla e thehoa.Mokhahlelo oa boraro le oa ho qetela o nolofalletsa ho hasana (eo ka linako tse ling ho bitsoang "self-adhesion" ea limolek'hule tsa polymer ho etsa filimi e tsoelang pele e le kannete.Nakong ea ho etsoa ha filimi, likaroloana tse ka thōko tsa latex tsa selefouno li kopana ho ba karolo e ncha e tšesaane ea filimi e nang le khatello e matla ea khatello.Ho totobetse hore e le hore phofo ea polymer e qhalahang e khone ho etsa filimi ka seretse se tsosolositsoeng, mocheso o fokolang oa filimi (MFT) o tlameha ho tiisetsoa hore o tlase ho feta mocheso o folisang oa seretse.
Colloids - joala ba polyvinyl bo tlameha ho aroloa ho tsamaiso ea membrane ea polymer.Sena ha se bothata tsamaisong ea seretse sa samente ea alkaline, hobane joala ba polyvinyl bo tla silafatsoa ke alkali e hlahisoang ke samente hydration, 'me adsorption ea thepa ea quartz e tla arola joala ea polyvinyl butle-butle ho tloha tsamaisong, ntle le hydrophilic protective colloid. ., Filimi e entsoeng ka ho qhalakanya phofo ea latex e redispersible, e ke keng ea qhibiliha ka metsing, e ke ke ea sebetsa feela maemong a omileng, empa hape le maemong a nako e telele a ho qoelisoa metsing.Ha e le hantle, lits'ebetsong tse seng tsa alkaline, tse kang gypsum kapa litsamaiso tse nang le li-fillers feela, kaha joala ba polyvinyl bo ntse bo le teng ka mokhoa o itseng filiming ea ho qetela ea polymer, e amang ho hanyetsa metsi ha filimi, ha litsamaiso tsena li sa sebelisetsoe metsi a nako e telele. ho qoelisoa, 'me polymer e ntse e e-na le litšobotsi tsa eona tsa mochini, phofo ea polymer e qhalahang e ntse e ka sebelisoa lits'ebetsong tsena.
Ka sebopeho sa ho qetela sa filimi ea polymer, tsamaiso e entsoeng ka li-binders tsa inorganic le organic binders e thehoa ka har'a seretse se phekotsoeng, ke hore, masapo a brittle le a thata a entsoeng ka thepa ea hydraulic, 'me phofo ea polymer e qhalakantsoeng e thehoa ka lekhalo le holim'a metsi a tiileng.marangrang a fetohang.Matla a tsitsitseng le momahano oa filimi ea resin ea polymer e entsoeng ke phofo ea latex e ntlafatsoa.Ka lebaka la ho feto-fetoha ha polymer, matla a deformation a phahame haholo ho feta sebopeho se thata sa lejoe la samente, ts'ebetso ea deformation ea seretse e ntlafatsoa, 'me phello ea khatello ea kelello e ntlafala haholo, kahoo e ntlafatsa ho hanyetsa ha seretse. .
Ka keketseho ea litaba tsa phofo ea polymer e qhalahang, sistimi eohle e tsoela pele ho ea ho polasetiki.Tabeng ea boleng bo phahameng ba phofo ea latex, karolo ea polymer ka seretse se phekotsoeng butle-butle e feta karolo ea sehlahisoa sa inorganic hydration, seretse se tla ba le liphetoho tsa boleng bo botle ebe se fetoha elastomer, 'me sehlahisoa sa hydration sa samente se tla fetoha "filler" ".Matla a tsitsitseng, elasticity, ho feto-fetoha ha maemo le ho tiisa thepa ea seretse se fetotsoeng ka phofo ea polymer e qhalakaneng e ile ea ntlafatsoa.Ho kenngoa ha li-polymer powders tse qhalakahang ho lumella filimi ea polymer (filimi ea latex) hore e thehe le ho etsa karolo ea marako a pore, ka hona e tiisa sebopeho se nang le mahlahahlaha a mangata haholo a seretse.Lera la latex le na le mokhoa oa ho its'oara o kenyang tsitsipano sebakeng sa eona sa ho ema ka seretse.Ka matla ana a ka hare, seretse se tšoaroa ka kakaretso, kahoo se eketsa matla a momahano a seretse.Ho ba teng ha li-polymers tse tenyetsehang haholo le tse otlolohileng haholo ho ntlafatsa ho tenyetseha le ho tenyetseha ha seretse.Mokhoa oa ho eketseha ha khatello ea lihlahisoa le matla a ho hlōleha ke ka tsela e latelang: ha ho sebelisoa matla, li-microcracks li lieha ka lebaka la ntlafatso ea ho feto-fetoha ha maemo le elasticity, 'me ha li thehoe ho fihlela khatello e phahameng e fihla.Ntle le moo, libaka tsa polymer tse lohiloeng li boetse li sitisa ho kopanngoa ha li-microcracks ka har'a mapetsong.Ka hona, phofo ea polymer e senyehang e eketsa khatello ea maikutlo le ho hlōleha ha thepa.
Filimi ea polymer ka seretse se entsoeng ka polymer e na le phello ea bohlokoa haholo ho thatafala ha seretse.The redispersible polymer phofo ajoa ka segokanyimmediamentsi sa sebolokigolo phetha karolo e 'ngoe ea bohlokoa ka mor'a hore qhalakantsoeng le ho thehoa filimi, e leng ho eketsa adhesion ho thepa ho kopana.Ka har'a microstructure ea sebaka se pakeng tsa seretse se entsoeng ka phofo ea polymer-modified ceramic tile bonding le tile ea ceramic, filimi e entsoeng ke polima e etsa borokho pakeng tsa thaele ea vitrified ea ceramic e nang le metsi a tlaase haholo le matrix a seretse sa samente.Sebaka sa ho kopana pakeng tsa lisebelisoa tse peli tse sa tšoaneng ke sebaka se khethehileng se nang le kotsi e kholo moo ho phunyeha ha shrinkage ho theha 'me ho lebisa ho lahleheloa ke ho khomarela.Ka hona, bokhoni ba lifilimi tsa latex ho folisa mapetsong a shrinkage bo phetha karolo ea bohlokoa ho li-adhesive tsa lithaele.
Ka nako e ts'oanang, phofo ea polymer e ka sebelisoang hape e nang le ethylene e na le sekhomaretsi se hlahelletseng ho li-substrates tsa organic, haholo-holo lisebelisoa tse tšoanang, tse kang polyvinyl chloride le polystyrene.Mohlala o motle oa
Nako ea poso: Oct-31-2022