I-Gypsum iyinto ejwayelekile yokwakha esetshenziselwa umhlobiso wangaphakathi nangaphandle. Kuyathandwa ngokuqina kwayo, ama-aesthetics, kanye nokumelana nomlilo. Kodwa-ke, naphezu kwalezi zinzuzo, udaka lungakha imifantu ngokuhamba kwesikhathi, olungabeka engcupheni ubuqotho bayo futhi luthinte ukubukeka kwalo. Ukuqhekeka kwesidakamizwa kungenzeka ngezizathu ezahlukahlukene, kufaka phakathi izici zezemvelo, ukwakhiwa okungafanele, kanye nezinto ezisezingeni eliphakeme. Eminyakeni yamuva nje, izithasiselo ze-hpdroxypropyly methylcellulose (HPMC) zivele njengesixazululo sokuvimbela ukuqhekeka kodaka. Le ndatshana igcizelela ukubaluleka kwezithasiselo ze-HPMC ekuvikeleni imifantu yodaka yokuvimbela ukuqhekeka nokuthi basebenza kanjani.
Yini izengezo ze-HPMC futhi zisebenza kanjani?
Izengezo ze-HPMC zivame ukusetshenziswa embonini yezokwakha njenge-ejenti ye-coating kanye ne-viscosity modifiers kuma-application amaningi, kufaka phakathi ukulungiswa. Isuselwa ku-cellulose, iyancibilika emanzini abandayo futhi ashisayo ngakho-ke ingasetshenziswa ezinhlelweni ezahlukahlukene zokwakha. Uma kuxutshwe namanzi, i-HPMC powder yakha into efana nejeli engangezelelwa ekuxubeni iStucco noma isetshenziswe njengokuhlanganiswa kodonga olubunjiwe. Ukuthungwa okufana ne-gel ye-HPMC kuvumela ukuthi kusabalale ngokulinganayo, ukuvimba ukuhanjiswa ngokweqile komswakama futhi kunciphise ubungozi bokuqhekeka.
Inzuzo enkulu yezengezo ze-HPMC yikhono lokulawula izinga le-hypsum, okuvumela izikhathi zokuhlela ezikahle. Lezi zithangeluza zidala umgoqo oshelela ukukhishwa kwamanzi, ngaleyo ndlela anciphise ithuba lokuwomisa ngaphambi kwesikhathi nokuqhekeka okulandelayo. Ngaphezu kwalokho, i-HPMC ingasabalalisa ama-bubble e-air enhlanganisweni ye-gypsum, esiza ukuthuthukisa ukusebenza kwayo futhi yenza kube lula ukufaka isicelo.
Vimbela ukuqhekeka kodaka ngokusebenzisa izengezo ze-HPMC
Ukomisa i-shrinkage
Enye yezimbangela eziphambili zokuqhekeka kodaka ukomisa i-shrinkage ye-poppaper ebusweni. Lokhu kwenzeka lapho i-stucco iyoma futhi icwilisa, idale ukungezwani okubangela ukuqhekeka. Izengezo ze-HPMC zingasiza ukunciphisa ukomisa i-shrinkage ngokunciphisa izinga lapho amanzi avele ephuma engxube ye-gypsum, okuholela ekusakazweni okungaphezulu kwamanzi. Lapho ingxube ye-Plaster inokuqukethwe komswakama okungaguquki, izinga lokumisa liyunifomu, linciphisa ubungozi bokuqhekeka kanye ne-shrinkage.
Ukuxuba okungafanele
Ezimweni eziningi, udaka oluxutshwe kabi luzoholela ezindaweni ezibuthakathaka ezingaphulwa kalula. Kusetshenziswa izengezo ze-HPMC kuma-gypsum mix kungasiza ukuthuthukisa izakhiwo zokwakha futhi kwenze inqubo yokwakha ibusheleleze. Lezi izengezo zihlakaza ngamanzi ngokulinganayo kulo lonke udaka, oluvumela amandla angaguquki kanye nokunciphisa ingozi yokuqhekeka.
Ukushisa Ukushintshashintsha
Ukushintshwa kwamazinga okushisa ngokweqile kungadala ukuthi i-stucco yandise kanye nenkontileka, ukudala ukungezwani okungaholela emihlafunweni. Ukusetshenziswa kwezengezo ze-HPMC kunciphisa izinga lokuhwamuka kwamanzi, ngaleyo ndlela kunciphise inqubo yokwelapha futhi kunciphise ubungozi bokunwetshwa okusheshayo okushisayo. Lapho udaka lome ngoma ngokulinganayo, kunciphisa amandla ezindawo zasendaweni ukweqisa, ukudala ukungezwani okungaholela ekuqhekekeni.
Isikhathi sokuphelisa esinganele
Mhlawumbe isici esibaluleke kakhulu ekuqhekekeni kodaka isikhathi sokulashwa esinganele. Izengezo ze-HPMC zenza ukukhishwa kwamanzi kwingxube ye-gypsum, ngaleyo ndlela unwebe isikhathi sokusetha. Izikhathi zokuphumula zokuphumula zithuthukisa ukuvumelana kwe-stucco futhi zinciphise ukubukeka kwezindawo ezibuthakathaka ezingase ziqhekeke. Ngokwengeziwe, izithasiselo ze-HPMC zisiza ukudala isithiyo ngokumelene nezimo zezulu ezibi kakhulu ezingadala ukuqhekeka ezindaweni eziveziwe.
Ekuphetheni
Ukuqhekeka eStucco kuvamile embonini yezokwakha futhi kungaholela ekubuyiselweni okubizayo nasekubizeni okungathandeki. Ngenkathi kunezinto eziningi ezingadala ukuqhekeka ngodaka, kusetshenziswa izengezo ze-HPMC yisisombululo esisebenzayo sokuvimbela imifantu. Umsebenzi wezengezo ze-HPMC ukwakha umgoqo ovimbela ukuhanjiswa ngokweqile komswakama futhi wehlise ukumiswa kwe-shrinkage kanye nokunwetshwa kwe-thermal. Lezi izengezo zibuye zithuthukise ukuzokwenza, okuholele emandleni angaguquki kanye nekhwalithi engcono yocingo. Ngokungeza izengezo ze-HPMC ekuxubeni kodaka, abakhi bangaqinisekisa indawo ehlala isikhathi eside, ebabazekayo.
Isikhathi sePosi: Sep-26-2023