Ukuhlobana kwempushana ye-latex emanzini lapho ihlakazwa kabusha, ama-viscosities ahlukene empushana ye-latex ngemva kokuhlakazwa, ithonya emoyeni wodaka kanye nokusatshalaliswa kwamabhamuza omoya, ukusebenzisana phakathi kwempushana yerabha nezinye izithasiselo, njll., kwenza okuhlukile. izimpushana ze-latex ziye zanda uketshezi., Khulisa i-thixotropy, ukwandisa i-viscosity nokunye.
Thuthukisa ukusebenza
Ngokuvamile kukholakala ukuthi i-latex powder ehlakazeka kabusha ithuthukisa ukusebenza kodaka olusha: i-latex powder, ikakhulukazi i-colloid evikelayo, inobudlelwane bamanzi futhi yandisa i-viscosity ye-slurry futhi ithuthukisa ukuhlangana kodaka lokwakha.Ngemuva kokwakhiwa kodaka olusanda kuxutshwa oluqukethe i-latex powder dispersion, ngokumuncwa kwamanzi endaweni engaphansi, ukusetshenziswa kwe-hydration reaction, kanye nokushintshashintsha emoyeni, amanzi azokwehla kancane kancane, izinhlayiya zizosondela kancane kancane, ukuxhumana kancane kancane ziba lufifi, futhi kancane kancane zizohlangana futhi ekugcineni zihlanganiswe.ukwakha ifilimu.Inqubo yokwakhiwa kwefilimu ye-polymer ihlukaniswe izigaba ezintathu.Esigabeni sokuqala, izinhlayiya ze-polymer zihamba ngokukhululekile ngesimo sokunyakaza kwe-Brownian ku-emulsion yokuqala.Njengoba amanzi ehwamuka, ukunyakaza kwezinhlayiyana ngokwemvelo kukhawulelwe ngokwengeziwe, futhi ukungezwani kobuso phakathi kwamanzi nomoya kuyawaphoqa ukuthi aqondane kancane kancane.Esigabeni sesibili, lapho izinhlayiya ziqala ukuxhumana, amanzi akunethiwekhi ayahwamuka ngokusebenzisa i-capillary, futhi ukungezwani okuphezulu kwe-capillary okufakwe ebusweni bezinhlayiya kubangela ukuguquguquka kwezinhlayiya ze-latex ukuze zihlangane, futhi amanzi asele agcwalisa ama-pores, futhi ifilimu yakhiwe cishe.Isigaba sesithathu, sokugcina sivumela ukusakazeka (ngezinye izikhathi okubizwa ngokuthi i-self-adhesion) yama-molecule e-polymer ukwakha ifilimu yeqiniso eqhubekayo.Ngesikhathi sokwenziwa kwefilimu, izinhlayiya ze-latex ezihamba zodwa zihlangana zibe yisigaba esisha sefilimu esinokucindezeleka okukhulu.Ngokusobala, ukuze unike amandla impushana ye-latex ehlakazeka kabusha ukuze yakhe ifilimu odakeni oluqinile, kuyadingeka ukuqinisekisa ukuthi izinga lokushisa elincane lokubunjwa kwefilimu (MFT) liphansi kunezinga lokushisa lokuphulukisa lodaka.
Khulisa ingcindezi yezinto ezibonakalayo
Ngokwakhiwa kokugcina kwefilimu ye-polymer, uhlelo oluhlanganisa izakhiwo ze-inorganic kanye ne-organic binder, okungukuthi, uhlaka lwamathambo oluqinile futhi oluqinile olwakhiwe ngezinto ezisebenza nge-hydraulic, kanye nefilimu eyakhiwe yimpushana ye-latex ehlakazeka kabusha ezikhaleni kanye nezindawo eziqinile. udaka olulashiwe.inethiwekhi eguquguqukayo.Amandla aqinile kanye nokuhlangana kwefilimu ye-polymer resin eyakhiwe yi-latex powder kuyathuthukiswa.Ngenxa yokuguquguquka kwe-polymer, amandla okuguqula aphakeme kakhulu kunesakhiwo esiqinile samatshe usimende, ukusebenza kwe-deformation yodaka kuyathuthukiswa, futhi umphumela wokuhlakazeka kwengcindezi uthuthukiswa kakhulu, ngaleyo ndlela kuthuthukiswe ukumelana nokuqhekeka kodaka. .Ngokukhula kokuqukethwe kwempushana ye-latex ehlakazeka kabusha, lonke uhlelo luthuthukela kupulasitiki.Endabeni yokuqukethwe okuphezulu kwe-latex powder, isigaba se-polymer odakeni oluphulukisiwe kancane kancane sidlula isigaba somkhiqizo we-inorganic hydration, futhi udaka luzoshintsha ikhwalithi futhi lube i-elastomer, kuyilapho umkhiqizo we-hydration kasimende uba "ukugcwalisa".“.Amandla aqinile, ukunwebeka, ukuguquguquka kanye nokuvaleka kodaka oluguquliwe yi-latex powder ehlakazeka kabusha konke kuyathuthukiswa.Ukuhlanganiswa kwempushana ye-latex ehlakazeka kabusha kuvumela ifilimu ye-polymer (ifilimu ye-latex) ukuthi yakhe futhi yakhe ingxenye yodonga lwezimbotshana, ngaleyo ndlela ivale ukwakheka okuphezulu kwe-porosity yodaka.Ulwelwesi lwe-latex lunomshini wokuzelula osebenza kanzima lapho luboshelwe odakeni.Ngala mandla angaphakathi, udaka lugcinwa lulonke, ngaleyo ndlela lukhulise amandla okuhlangana kodaka.Ukuba khona kwama-polymers aguquguquka kakhulu futhi anwebeka kakhulu kuthuthukisa ukuguquguquka nokunwebeka kodaka.Indlela yokwandisa ukucindezeleka kwesivuno namandla okuhluleka ingokulandelayo: lapho kusetshenziswa amandla, ama-microcracks abambezeleka kuze kufinyelelwe ukucindezeleka okuphezulu ngenxa yokuguquguquka okuthuthukisiwe nokunwebeka.Ukwengeza, izizinda ze-polymer ezihlanganisiwe futhi zivimbela ukuhlangana kwama-microcracks emifantwini engena.Ngakho-ke, i-polymer powder ehlakazeka kabusha ithuthukisa ukucindezelwa kokuhluleka kanye nokwehluleka kokusebenza kwezinto.
Isikhathi sokuthumela: Mar-09-2023