I-Gypsum iyinto yokwakha evamile esetshenziselwa ukuhlobisa udonga lwangaphakathi nolwangaphandle. Ithandwa ngenxa yokuqina kwayo, ubuhle bayo, kanye nokumelana nomlilo. Kodwa-ke, naphezu kwalezi zinzuzo, i-plaster ingadala imifantu ngokuhamba kwesikhathi, okungalimaza ubuqotho bayo futhi kuthinte ukubukeka kwayo. Ukuqhekeka kwe-plaster kungenzeka ngezizathu ezahlukahlukene, kufaka phakathi izici zemvelo, ukwakhiwa okungafanele, kanye nezinto ezisezingeni eliphansi. Eminyakeni yamuva nje, izithasiselo ze-hydroxypropyl methylcellulose (HPMC) ziye zavela njengesixazululo sokuvimbela ukuqhekeka kwe-plaster. Lesi sihloko siqokomisa ukubaluleka kwezithasiselo ze-HPMC ekuvimbeleni imifantu ye-plaster nokuthi zisebenza kanjani.
Ziyini izithasiselo ze-HPMC futhi zisebenza kanjani?
Izithasiselo ze-HPMC zivame ukusetshenziswa embonini yokwakha njengezinto zokumboza kanye neziguquli ze-viscosity ezindaweni eziningi, okuhlanganisa nokuplasta. Zitholakala ku-cellulose, ziyancibilika emanzini abandayo nashisayo ngakho-ke zingasetshenziswa ezindaweni ezahlukene zokwakha. Uma zixutshwe namanzi, i-HPMC powder yakha into efana nejeli engangezwa ezingxubeni ze-stucco noma ifakwe njengengubo ebusweni bezindonga eziplasta. Ukuthungwa okufana nejeli kwe-HPMC kuyivumela ukuthi isakazeke ngokulinganayo, ivimbele ukuhwamuka ngokweqile komswakama futhi inciphise ingozi yokuqhekeka.
Inzuzo ebalulekile yezithasiselo ze-HPMC yikhono lokulawula izinga lokumanzisa kwe-gypsum, okuvumela izikhathi ezifanele zokubeka. Lezi zithasiselo zakha isithiyo esinciphisa ukukhishwa kwamanzi, ngaleyo ndlela sinciphise amathuba okoma ngaphambi kwesikhathi kanye nokuqhekeka okulandelayo. Ngaphezu kwalokho, i-HPMC ingasabalalisa amabhamuza omoya engxubeni ye-gypsum, okusiza ukuthuthukisa ukusebenza kwayo futhi kwenze kube lula ukuyisebenzisa.
Vimbela imifantu yeplasta ngokusebenzisa izithasiselo ze-HPMC
Ukomisa ukuncishiswa
Esinye sezimbangela eziyinhloko zokuqhekeka kweplasta ukomisa ukushwabana kobuso beplasta. Lokhu kwenzeka lapho i-stucco yoma futhi ishwabana, okudala ukucindezeleka okubangela ukuqhekeka. Izithasiselo ze-HPMC zingasiza ekunciphiseni ukushwabana kokomisa ngokunciphisa izinga lapho amanzi ephuma khona engxubeni ye-gypsum, okuholela ekusabalaleni kwamanzi okulinganayo. Uma ingxube yeplasta inomswakama ohambisanayo, izinga lokomisa liyafana, kunciphisa ingozi yokuqhekeka nokushwabana.
Ukuxuba okungafanele
Ezimweni eziningi, i-plaster engaxubene kahle izobangela amaphuzu abuthakathaka angaphuka kalula. Ukusebenzisa izithasiselo ze-HPMC ezixubeni ze-gypsum kungasiza ekuthuthukiseni izakhiwo zokwakha futhi kwenze inqubo yokwakha ibe lula. Lezi zithasiselo zihlakaza amanzi ngokulinganayo kulo lonke i-plaster, okuvumela amandla ahlala njalo futhi kuncishiswe ingozi yokuqhekeka.
ukushintshashintsha kwezinga lokushisa
Ukushintshashintsha kwezinga lokushisa okukhulu kungabangela ukuthi i-stucco ikhule futhi inciphe, okubangela ukucindezeleka okungaholela ekuqhekekeni. Ukusetshenziswa kwezithasiselo ze-HPMC kunciphisa izinga lokuhwamuka kwamanzi, ngaleyo ndlela kunciphise inqubo yokuqina futhi kunciphise ingozi yokwanda okusheshayo kokushisa. Uma i-plaster yoma ngokulinganayo, kunciphisa amathuba okuba izindawo ezisendaweni zome ngokweqile, okubangela ukucindezeleka okungaholela ekuqhekekeni.
Isikhathi sokupholisa esinganele
Mhlawumbe isici esibaluleke kakhulu ekuqhekekeni kweplasta ukuthi isikhathi sokupholisa asinele. Izithasiselo ze-HPMC zinciphisa ukukhishwa kwamanzi engxubeni ye-gypsum, ngaleyo ndlela zandise isikhathi sokusetha. Izikhathi zokupholisa ezinde zithuthukisa ukuqina kwe-stucco futhi zinciphise ukubonakala kwezindawo ezibuthakathaka ezingase ziqhekeke. Ngaphezu kwalokho, izithasiselo ze-HPMC zisiza ukudala isithiyo ezimweni zezulu ezimbi kakhulu ezingabangela imifantu ezindaweni eziveziwe.
Ekuphetheni
Ukuqhekeka kwe-stucco kuvamile embonini yokwakha futhi kungaholela ekulungisweni okubizayo kanye namabala angabonakali. Nakuba kunezici eziningi ezingabangela imifantu ku-plaster, ukusebenzisa izithasiselo ze-HPMC kuyisisombululo esisebenzayo sokuvimbela imifantu. Umsebenzi wezithasiselo ze-HPMC ukwakha isithiyo esivimbela ukuhwamuka ngokweqile komswakama futhi sinciphise ukushwabana kokoma kanye nokwanda kokushisa. Lezi zithasiselo ziphinde zithuthukise ukusebenza kahle, okuholela ekuqineni okuqhubekayo kanye nekhwalithi engcono ye-plaster. Ngokufaka izithasiselo ze-HPMC ezixubeni ze-plaster, abakhi bangaqinisekisa indawo ehlala isikhathi eside, ekhangayo ngokubonakalayo.
Isikhathi sokuthunyelwe: Septhemba-26-2023