Redispersible latex powder yi-emulsion ekhethekileyo yamanzi kunye ne-polymer binder eyenziwe ngokufafaza ukomisa nge-vinyl acetate-ethylene copolymer njengeyona nto iphambili ekrwada. Emva kokuba inxalenye yamanzi iphuphuma, iinqununu zepolymer zenza ifilimu yepolymer nge-agglomeration, esebenza njenge-binder. Xa i-latex powder ephinda isetyenziswe isetyenziswe kunye neeminerali ze-inorganic gelling ezifana nesamente, inokuguqula udaka. Imisebenzi ephambili ye-latex powder ye-latex edibeneyo ilandelayo.
(1) Phucula ukomelela kwebhondi, ukomelela nokugoba.
I-latex powder enokuphinda ikwazi ukuphucula ngokubonakalayo amandla ebhondi yodaka. Okukhona isixa esongeziweyo, kokukhona siphakamisa. Amandla okubambisana okuphakamileyo anokuthintela ukuncipha kwinqanaba elithile, kwaye ngexesha elifanayo, uxinzelelo oluveliswa yi-deformation kulula ukusabalalisa kunye nokukhululwa, ngoko ke amandla okudibanisa kubaluleke kakhulu ekuphuculeni ukuchasana nokuqhekeka. Uphononongo lubonise ukuba i-synergistic effect ye-cellulose ether kunye ne-polymer powder inceda ekuphuculeni amandla okubambisana kwe-samente yodaka.
(2) Nciphisa imodyuli elastiki yodaka, ukwenzela ukuba udaka lwesamente olune-brittle lunomlinganiselo othile wokuguquguquka.
I-modulus elastic of redispersible latex powder iphantsi, i-0.001-10GPa; ngelixa i-elastic modulus ye-cement mortar iphezulu, i-10-30GPa, ngoko i-modulus elastic yodaka lwesamente iya kuncipha kunye nokongezwa kwepolymer powder. Nangona kunjalo, uhlobo kunye nobungakanani bepolymer powder nabo banefuthe kwimodyuli ye-elasticity. Ngokubanzi, njengoko umlinganiselo wepolymer ukuya kwisamente ukhula, imodyuli ye-elasticity iyancipha kwaye ukukhubazeka kuyanda.
(3) Ukuphucula ukunganyangeki kwamanzi, ukuxhathisa kwe-alkali, ukuxhathisa kwe-abrasion kunye nokumelana nempembelelo.
Isakhiwo se-membrane yenethiwekhi eyenziwe yi-polymer itywina imingxuma kunye nokuqhekeka kwi-samente yodaka, inciphisa i-porosity yomzimba onzima, kwaye ngaloo ndlela iphucula ukunganyanzeki, ukuxhathisa kwamanzi kunye nokuxhathisa iqabaka yodaka lwesamente. Esi siphumo sinyuka ngokunyuka kwe-polymer-cement ratio. Ukuphuculwa kokumelana nokunxiba kuhambelana nohlobo lwepolymer powder kunye nomlinganiselo wepolymer kwisamente. Ngokubanzi, ukumelana nokunxiba kuphucula njengoko umlinganiselo wepolymer ukuya kwisamente ukhula.
(4) Ukuphucula ukuguquguquka kunye nokusebenza kodaka.
(5) Ukuphucula ukugcinwa kwamanzi kudaka kunye nokunciphisa ukujika kwamanzi abe ngumphunga.
I-emulsion ye-polymer eyenziwe ngokunyibilikisa i-polymer powder emanzini ihlakazekile kwi-mortar, kwaye ifilimu eqhubekayo ye-organic yenziwa kumdaka emva kokuqina. Le filimu yezinto eziphilayo inokuthintela ukufuduka kwamanzi, ngaloo ndlela inciphisa ukulahlekelwa kwamanzi kumdaka kunye nokudlala indima yokugcina amanzi.
(6) Nciphisa isiganeko sokuqhekeka
Ubude kunye nokuqina kodaka lwesamente olulungisiweyo lwepolymer lungcono kunodaka oluqhelekileyo lwesamente. Ukusebenza kwe-flexural kungaphezulu kwamaxesha e-2 kunodaka oluqhelekileyo lwesamente; ukuqina kwempembelelo kwanda ngokunyuka komlinganiselo wesamente yepolymer. Ngokunyuka kwenani lepolymer powder eyongeziweyo, i-flexible cushioning effect ye-polymer inokuthintela okanye ukulibazisa ukuphuhliswa kokuqhekeka, kwaye kwangaxeshanye inefuthe elihle lokusabalalisa uxinzelelo.
Ixesha lokuposa: Jun-20-2023