Nigute ifu ya latex itezimbere imikorere ya minisiteri

Ivangavanze ryumye ryakozwe no kuvanga ifu ya redispersible latex hamwe nandi mavuta adafatika hamwe nibintu bitandukanye, ibyuzuza nibindi byongeweho. Iyo ifu yumye yumye yongewe mumazi hanyuma ikayungurura, hifashishijwe imbaraga za hydrophilique irinda colloid hamwe nimbaraga zo gukata imashini, uduce twa porojeri ya latx irashobora gukwirakwira vuba mumazi, ibyo bikaba bihagije kugirango habeho ifu ya latx idasubirwaho. firime.

Ibigize ifu ya latex iratandukanye, izagira ingaruka kuri rheologiya hamwe nubwubatsi butandukanye bwa minisiteri. Kuba ifu ya latex ifata amazi mugihe yongeye gusubirwamo, ibishishwa bitandukanye byifu ya latex nyuma yo gutatana, ingaruka kumyuka yumwuka wa minisiteri no gukwirakwiza ibibyimba byo mu kirere, imikoranire hagati yifu ya latx nibindi byongerwaho, nibindi, ikora bitandukanye. ifu ya latex yongereye amazi. , Ongera thixotropy, ongera ubukonje nibindi.

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, hanyuma gahoro gahoro hamwe, hanyuma amaherezo yegeranya 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 bihuye, amazi yo murusobe azenguruka binyuze mumiyoboro ya capillary, kandi impagarara nyinshi za capillary zikoreshwa hejuru yibice bitera ihindagurika ryimiterere ya latex kubihuza hamwe, kandi amazi asigaye yuzuza imyenge, kandi firime iba ikozwe hafi.

Icyiciro cya gatatu, cyanyuma gishoboza gukwirakwiza molekile ya polymer muri 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 kugirango ushoboze ifu ya redxersible powder gukora firime muri minisiteri ikomye, birakenewe ko harebwa niba ubushyuhe buke bwa firime bugabanutse munsi yubushyuhe bwo gukiza bwa minisiteri. .

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. Muri minisiteri, ni ukunoza ubwitonzi, modulus yo hejuru ya elastike nizindi ntege nke za minisiteri gakondo ya sima, no guha sima ya sima hamwe nubworoherane bukomeye hamwe nimbaraga zingirakamaro, kugirango irwanye kandi itinde kubyara ibisekuru bya sima. Kubera ko polymer na minisiteri bigize imiyoboro ihuza imiyoboro, hakozwe firime ikomeza ya polymer mu byobo, bishimangira isano iri hagati ya agregate kandi igahagarika imyenge imwe muri minisiteri, bityo minisiteri yahinduwe nyuma yo gukomera iruta sima ya sima. Hariho iterambere ryinshi.