Redispersible latex powder iyi-emulsion ekhethekile esekwe emanzini kanye ne-polymer binder eyenziwe ngokumiswa ngokufutha nge-vinyl acetate-ethylene copolymer njengento eyinhloko eluhlaza. Ngemva kokuhwamuka kwengxenye yamanzi, izinhlayiya ze-polymer zakha ifilimu ye-polymer nge-agglomeration, esebenza njengesibopho. Uma impushana ye-latex ehlakazeka kabusha isetshenziswa kanye namaminerali e-inorganic gelling njengosimende, ingalushintsha udaka. Imisebenzi esemqoka ye-latex powder ehlakazeka kabusha imi kanje.
(1) Thuthukisa amandla ebhondi, amandla aqinile namandla okugoba.
I-latex powder ehlakazeka kabusha ingathuthukisa kakhulu amandla esibopho sodaka. Uma inani elingeziwe lingeziwe, i-lift iyanda. Amandla okubopha okuphezulu angavimbela ukuncipha ngezinga elithile, futhi ngesikhathi esifanayo, ukucindezeleka okukhiqizwa ukuguqulwa kulula ukuhlakazeka nokukhulula, ngakho amandla okubopha kubaluleke kakhulu ekuthuthukiseni ukumelana nokuqhekeka. Ucwaningo luye lwabonisa ukuthi umphumela we-synergistic we-cellulose ether kanye ne-polymer powder usiza ukuthuthukisa amandla esibopho sodaka lukasimende.
(2) Yehlisa imodulus enwebekayo yodaka, ukuze udaka lukasimende oluphukayo lube nezinga elithile lokuguquguquka.
I-modulus elastic of redispersible latex powder iphansi, i-0.001-10GPa; kuyilapho i-modulus enwebekayo yodaka lukasimende iphakeme, i-10-30GPa, ngakho-ke i-modulus elastic yodaka lukasimende izokwehla ngokungezwa kwe-polymer powder. Kodwa-ke, uhlobo nenani le-polymer powder nalo linomthelela ku-modulus yokunwebeka. Ngokuvamile, njengoba isilinganiso se-polymer kuya kusimende sikhula, i-modulus yokuqina iyancipha futhi ukukhubazeka kuyanda.
(3) Thuthukisa ukumelana namanzi, ukumelana ne-alkali, ukumelana nemihuzuko kanye nokumelana nomthelela.
Isakhiwo se-membrane yenethiwekhi esakhiwe yi-polymer sivala izimbobo kanye nokuqhekeka odongeni lukasimende, sinciphisa i-porosity yomzimba oqinile, futhi ngaleyo ndlela sithuthukise ukungakwazi ukungena, ukumelana kwamanzi kanye nokumelana nesithwathwa sodaka lukasimende. Lo mphumela ukhuphuka ngokwanda kwe-polymer-cement ratio. Ukuthuthukiswa kokumelana nokugqoka kuhlobene nohlobo lwe-polymer powder kanye nesilinganiso se-polymer kusimende. Ngokuvamile, ukumelana nokugqoka kuyathuthuka njengoba isilinganiso se-polymer kusimende sikhula.
(4) Thuthukisa ukuguquguquka nokusebenza kodaka.
(5) Thuthukisa ukugcinwa kwamanzi odaka futhi unciphise ukuhwamuka kwamanzi.
I-emulsion ye-polymer eyakhiwe ngokuncibilikisa impushana ye-polymer ehlakazeka kabusha emanzini ihlakazeka odakeni, futhi ifilimu ephilayo eqhubekayo yenziwa odakeni ngemuva kokuqina. Le filimu ephilayo ingavimbela ukufuduka kwamanzi, ngaleyo ndlela inciphise ukulahlekelwa kwamanzi odakeni futhi idlale indima ekugcineni amanzi.
(6) Yehlisa ukwenzeka kokuqhekeka
Ubude nokuqina kodaka lukasimende olulungisiwe lwe-polymer kungcono kakhulu kunodaka olujwayelekile lukasimende. Ukusebenza okuguquguqukayo kungaphezu kwezikhathi ezi-2 kunodaka olujwayelekile lukasimende; ukuqina komthelela kuyanda ngokwanda kwesilinganiso se-polymer simende. Ngokunyuka kwenani le-polymer powder eyengeziwe, umphumela wokuguquguquka oguquguqukayo we-polymer ungavimbela noma ubambezele ukuthuthukiswa kwemifantu, futhi ngesikhathi esifanayo unomphumela omuhle wokuhlakazeka kokucindezeleka.
Isikhathi sokuthumela: Jun-20-2023