Inqubo yokukhiqiza kabusha i-polymer powder

Isingeniso

I-redispersible polymer powder (RDP) iwuhlobo lwe-polymer powder olungaphinde luhlakazwe emanzini ukuze lwakhe i-emulsion ezinzile. Isetshenziswa kabanzi embonini yezokwakha njengesengezo sokuthuthukisa ukusebenza kwezinto ezisekelwe usimende. I-RDP ikhiqizwa inqubo eyaziwa ngokuthi i-spray-drying, ehlanganisa ukufakwa kwe-atom yesisombululo se-polymer ibe yimpushana. Impushana iyomiswa futhi igaywe ibe usayizi wezinhlayiyana oyifunayo.

Inqubo yokukhiqiza ye-RDP ibandakanya izinyathelo ezimbalwa, okuhlanganisa ukukhetha kwe-polymer, ukulungiswa kwesixazululo, i-atomization, ukomisa, nokugaya. Izinga lomkhiqizo wokugcina lincike kakhulu kwikhwalithi yezinto ezingavuthiwe kanye nemingcele yenqubo esetshenziswa ngesikhathi sokukhiqiza.

Ukukhetha kwePolymer

Isinyathelo sokuqala enqubweni yokukhiqiza ye-RDP ukukhethwa kwe-polymer efanele. Ukukhethwa kwe-polymer kusekelwe ezintweni ezifunwayo zomkhiqizo wokugcina, njengokumelana namanzi, ukunamathela, nokuguquguquka. Ama-polymers asetshenziswa kakhulu ekukhiqizeni i-RDP ama-vinyl acetate-ethylene copolymers, ama-acrylic copolymers, ne-styrene-butadiene copolymer.

Ukulungiselela Isixazululo

Uma i-polymer isikhethiwe, bese incibilika ku-solvent ukuze kwakhiwe isisombululo. Izincibilikisi ezisetshenziswa kakhulu ekukhiqizweni kwe-RDP zingamanzi nezincibilikizi eziphilayo njenge-ethanol ne-isopropanol. Ukugxila kwesixazululo se-polymer ngokuvamile kuphakathi kwe-10-20%.

I-Atomization

Isinyathelo esilandelayo enqubweni yokukhiqiza ye-RDP i-atomization. I-Atomization inqubo yokuhlukanisa isixazululo se-polymer sibe amaconsi amancane. Lokhu ngokuvamile kwenziwa kusetshenziswa umlomo wombhobho wengcindezi ephezulu noma i-atomizer ejikelezayo. Amaconsi abe esemiswa emoyeni oshisayo ukuze enze impushana.

Ukomisa

Impushana ibe isiyomiswa emoyeni oshisayo ukuze kukhishwe isincibilikisi. Inqubo yokomisa ngokuvamile yenziwa emazingeni okushisa aphakathi kuka-80-120°C. Isikhathi sokumisa sincike ohlotsheni lwe-polymer esetshenzisiwe, ukugxila kwesixazululo, nosayizi wezinhlayiyana oyifunayo.

Ukugaya

Isinyathelo sokugcina ohlelweni lokukhiqiza i-RDP siwukugaya. Ukugaya kuyinqubo yokugaya impushana ibe usayizi wezinhlayiyana ocolekile. Lokhu ngokuvamile kwenziwa kusetshenziswa isigayo sesando noma isigayo sebhola. Usayizi wezinhlayiyana zomkhiqizo wokugcina ngokuvamile uphakathi kwama-microns angu-5-50.

Isiphetho

I-polymer powder e-redispersible iwuhlobo lwe-polymer powder engaphinde ihlakazwe emanzini ukuze yakhe i-emulsion ezinzile. Isetshenziswa kabanzi embonini yezokwakha njengesengezo sokuthuthukisa ukusebenza kwezinto ezisekelwe usimende. Inqubo yokukhiqiza ye-RDP ibandakanya izinyathelo ezimbalwa, okuhlanganisa ukukhetha kwe-polymer, ukulungiswa kwesixazululo, i-atomization, ukomisa, nokugaya. Izinga lomkhiqizo wokugcina lincike kakhulu kwikhwalithi yezinto ezingavuthiwe kanye nemingcele yenqubo esetshenziswa ngesikhathi sokukhiqiza.