Uruhare rwa redispersible latex ifu yumye ivanze

Kuba ifu ya latex ifata amazi mugihe yongeye gusubirwamo, ububobere butandukanye bwifu ya latex nyuma yo gutatana, ingaruka kumyuka yumwuka wa minisiteri no gukwirakwiza ibibyimba byo mu kirere, imikoranire hagati yifu ya reberi nibindi byongerwaho, nibindi, ikora bitandukanye. ifu ya latex yongereye amazi. , Ongera thixotropy, ongera ubukonje nibindi.

Kunoza imikorere

Muri rusange abantu bemeza ko ifu ya redxersible latx itezimbere imikorere ya minisiteri nshya: ifu ya latex, cyane cyane colloid ikingira, ifitanye isano n’amazi kandi ikongerera ubwiza bwikibabi kandi ikanoza ubumwe bwa minisiteri yubwubatsi. Nyuma yo kuvangwa na minisiteri ivanze irimo ifu ya latx ikwirakwizwa, hamwe no kwinjiza amazi hejuru yubutaka, gukoresha reaction ya hydration, hamwe no guhindagurika mukirere, amazi azagenda agabanuka buhoro buhoro, ibice bizagenda byegereza buhoro buhoro, intera izagenda yegera gahoro gahoro gahoro, kandi bazagenda bahuza buhoro buhoro hanyuma barangije. gukora firime. Inzira yo gukora firime ya polymer igabanijwemo ibyiciro bitatu. Mu cyiciro cya mbere, ibice bya polymer bigenda byisanzuye muburyo bwimikorere ya Brownian muri emulsion yambere. Amazi amaze guhinduka, kugenda kwingirangingo mubisanzwe biragenda bigabanuka, kandi ubushyamirane hagati yamazi nikirere bubahatira guhuza buhoro buhoro. Mu cyiciro cya kabiri, iyo ibice bitangiye guhura, amazi yo murusobe azenguruka binyuze muri capillary, kandi impagarara nyinshi za capillary zikoreshwa hejuru yibice bitera ihindagurika ryimiterere ya latex kubihuza hamwe, hamwe na amazi asigaye yuzuza imyenge, kandi firime irakozwe. Icyiciro cya gatatu, cyanyuma cyemerera gukwirakwiza (rimwe na rimwe bita kwifata) ya molekile ya polymer gukora firime yukuri ikomeza. Mugihe cyo gukora firime, uduce tumwe na tumwe twa mobile twateranije duhuza icyiciro gishya cya firime hamwe na stress nyinshi. Ikigaragara ni uko kugira ngo ifu ya redxersible latx ikore firime muri minisiteri ikomye, birakenewe ko harebwa niba ubushyuhe buke bwa firime (MFT) buri munsi yubushyuhe bwo gukiza bwa minisiteri.

Ongera imihangayiko

Hamwe nimikorere ya nyuma ya firime ya polymer, sisitemu igizwe nububiko bwa organic organique na organic binder, ni ukuvuga skeleton yamenetse kandi ikomeye igizwe nibikoresho bya hydraulic, hamwe na firime yakozwe nifu ya redispersible latex mu cyuho no hejuru yubutaka irakorwa muri minisiteri yakize. urusobe rworoshye. Imbaraga zingana hamwe no guhuza firime ya polymer resin yakozwe nifu ya latex irazamurwa. Bitewe nubworoherane bwa polymer, ubushobozi bwo guhindura ibintu burenze kure ubwubatswe bwa sima yamabuye ya sima, imikorere ya deforme ya minisiteri iratera imbere, kandi ingaruka zo gukwirakwiza stress ziratera imbere cyane, bityo bikazamura imbaraga zo guhangana na minisiteri. . Hamwe no kwiyongera kwibirimo byifu ya redxersible powder, sisitemu yose itera imbere yerekeza kuri plastiki. Ku bijyanye nifu ya latx nyinshi, icyiciro cya polymer muri minisiteri yakize iragenda irenga buhoro buhoro icyiciro cyibicuruzwa biva mu mahanga, kandi minisiteri izahinduka ihindagurika kandi ihinduka elastomer, mugihe ibicuruzwa biva muri sima bihinduka "uwuzuza". “. Imbaraga zingana, elastique, guhinduka no gufunga minisiteri yahinduwe nifu ya redispersible latex byose byatejwe imbere. Kuvanga ifu ya redxersible latex ifasha firime ya polymer (firime ya latex) gukora no gukora igice cyurukuta rwa pore, bityo igashyiraho ikimenyetso kinini cyimiterere ya minisiteri. Indangantego ya latex ifite uburyo bwo kurambura imbaraga zitera impagarara aho zometse kuri minisiteri. Binyuze muri izo mbaraga zimbere, minisiteri ikomeza muri rusange, bityo ikongerera imbaraga zifatika za minisiteri. Kuba polimeri ihindagurika cyane kandi yoroheje cyane itezimbere ubworoherane nubworoherane bwa minisiteri. Uburyo bwo kongera imbaraga zumusaruro nimbaraga zo kunanirwa nuburyo bukurikira: iyo hashyizweho ingufu, microcrack ziratinda kugeza igihe impagarara nyinshi zagerwaho bitewe nubworoherane nubworoherane. Byongeye kandi, imiyoboro ya polymer ihujwe nayo ibuza guhuriza hamwe microcrack mu gucengera. Kubwibyo, isubiranamo rya polymer ifu itezimbere kunanirwa no kunanirwa kwibikoresho.