The latex ufa potsirizira pake umapanga filimu ya polima, ndipo dongosolo lopangidwa ndi zinthu zopanda organic ndi organic binder limapangidwa mumatope ochiritsidwa, ndiko kuti, chigoba chophwanyika komanso cholimba chopangidwa ndi zida zamagetsi, ndi filimu yopangidwa ndi ufa wopangidwanso ndi latex ufa mumpata. ndi pamwamba olimba. flexible network. Kulimba kwamphamvu ndi kulumikizana kwa filimu ya utomoni wa polima yopangidwa ndi ufa wa latex kumakulitsidwa. Chifukwa cha kusinthasintha kwa polima, mphamvu yopindika ndiyokwera kwambiri kuposa momwe miyala ya simenti yolimba, kusinthika kwa matope kumatheka, ndipo zotsatira za kubalalitsa kupsinjika zimakula bwino, potero kuwongolera kukana kwa matope. . Ndi kuchuluka kwa zili redispersible latex ufa, dongosolo lonse akufotokozera pulasitiki. Pankhani ya high latex ufa okhutira, ndi polima gawo mu matope anachiritsa pang`onopang`ono kuposa inorganic hydration mankhwala gawo, ndi matope adzakhala kusintha Mkhalidwe ndi kukhala elastomer, pamene hydration mankhwala a simenti amakhala "filler". “.
Kulimba kwamphamvu, kusinthasintha, kusinthasintha ndi kusindikizidwa kwa matope osinthidwa ndi redispersible latex powder zonse zimakhala bwino. Kusakanikirana kwa ufa wa latex wopangidwanso kumapangitsa kuti filimu ya polima (latex film) ipange ndi kupanga gawo la khoma la pore, potero kusindikiza mawonekedwe apamwamba a matope. Nembanemba ya latex imakhala ndi njira yodzitambasulira yokha yomwe imapangitsa kugwedezeka komwe kumakakamira kumatope. Kupyolera mu mphamvu zamkati izi, matope amasungidwa lonse, motero amawonjezera mphamvu yogwirizana ya matope. Kukhalapo kwa ma polima osinthika kwambiri komanso zotanuka kwambiri kumapangitsa kuti matopewo asasunthike komanso kusinthasintha. Njira yowonjezerera kupsinjika kwa zokolola ndi kulephera mphamvu ndi motere: pamene mphamvu ikugwiritsidwa ntchito, ma microcracks amachedwa mpaka kupanikizika kwakukulu kufikiridwa chifukwa cha kusinthasintha ndi kusinthasintha. Kuonjezera apo, madera osakanikirana a polima amalepheretsanso kugwirizanitsa kwa microcracks mu ming'alu yolowera. Choncho, redispersible polima ufa amathandizira kulephera kupsinjika ndi kulephera kwa zinthuzo.
Filimu ya polima mumatope osinthika a polima imakhala ndi zotsatira zofunikira kwambiri pakuwumitsa matope. The redispersible latex ufa wogawira pa mawonekedwe amasewera gawo lina lofunika pambuyo pobalalitsidwa ndi kupanga mafilimu, zomwe zimawonjezera kumamatira kuzinthu zomwe zimagwirizana. Mu microstructure ya ufa polima kusinthidwa matailosi kugwirizana matope ndi matailosi mawonekedwe, filimu yopangidwa ndi polima amapanga mlatho pakati pa matailosi vitrified ndi otsika kwambiri mayamwidwe madzi ndi simenti matope masanjidwewo. Malo olumikizirana pakati pa zinthu ziwiri zosiyana ndi malo omwe ali pachiwopsezo chachikulu kuti ming'alu ya shrinkage ipangike ndikupangitsa kutayika kwa mgwirizano. Choncho, kuthekera kwa mafilimu a latex kuchiritsa ming'alu ya shrinkage ndikofunikira kwambiri pazomatira zamatayilo.
Nthawi yotumiza: Apr-10-2023