I-HPMC, eyaziwa nangokuthi i-hydroxypropyl methylcellulose, iyisengezo esisebenza ngempumelelo esisetshenziswa kabanzi embonini yezokwakha, ikakhulukazi ekwenzeni i-wall putty. I-wall putty isetshenziselwa ukulungisa nokulinganisa izindonga ngaphambi kokudweba, ngaleyo ndlela inikeze isiphetho esiphelele.
Abakhi abaningi baye baba nezinkinga ngokuwohloka esikhathini esidlule. I-Sag yenzeka lapho i-putty iqala ukushelela odongeni ngenxa yesisindo sayo. Lokhu kubangela isiphetho esingalingani futhi esingenamsebenzi esithatha isikhathi esiningi nomzamo ukusilungisa. Kodwa-ke, abakhi bathole isisombululo ngokungeza i-HPMC ku-wall putty, esiza ukuthuthukisa ukumelana ne-sag kanye nekhwalithi ephelele yomkhiqizo wokugcina.
Kunezizathu ezimbalwa zokuthi kungani i-HPMC iyisengezo esisebenzayo. Okokuqala, isebenza njenge-thickener, okusho ukuthi isiza ukukhulisa i-viscosity ye-putty. Lokhu kukhula kwe-viscosity kwenza kube nzima ukuthi okokusebenza kushelele ezindongeni futhi kusize ukunamathela okungcono ezindaweni ezingaphezulu. I-viscosity ethuthukisiwe ye-putty iphinde ikwazi ukugcwalisa ama-microcracks nezimbotshana ezincane ezindongeni, inikeze indawo ebushelelezi, elinganayo. Lesi sici futhi sisiza ukwehlisa inani le-putty elidingekayo ukumboza indawo engaphezulu enikeziwe, okuholela esixazululweni esingabizi kakhulu.
Okwesibili, i-HPMC idlala indima ebalulekile ekulawuleni isivinini sokumisa se-wall putty. Ijubane lokumisa lithinta ngqo ukumelana nokucwila kwe-putty, futhi i-putty eyomisa kancane ngokuvamile izinzile futhi akulula ukucwila. I-HPMC isiza ukulawula izinga lokuhwamuka kwamanzi ku-putty material, okubuye kuthinte isikhathi sayo sokumisa. Lokhu kunikezwa kuholela ku-putty ezinzile futhi engaguquki eyoma ngokulinganayo, enciphisa ithuba lokuwohloka.
I-HPMC ingasetshenziswa futhi ukuthuthukisa ukunamathela phakathi kwe-wall putty ne-substrate. I-Adhesion ibhekisela ezingeni i-putty material enamathela ngayo ebusweni esetshenziswa kuyo. I-HPMC ingathuthukisa kakhulu ukunamathela ngoba inikeza ifilimu evikelayo ebusweni, okuthuthukisa ukunamathela kwe-putty ku-substrate.
Ngaphezu kwalokho, i-HPMC ingasiza futhi ukugcina umswakama ezintweni ezifakwa odongeni. Nakuba amanzi eyisisetshenziswa esibalulekile sokucutshungulwa kwe-putty nokuqinisa, futhi ayimbangela enkulu yokuqhekeka nokuwohloka kwezinto lapho amanzi ehwamuka ngokushesha kakhulu. I-HPMC isiza ukugcina umswakama ku-putty impahla isikhathi eside, ivumela i-putty ukuthi ihlale ngokulinganayo futhi yome ngaphandle kokuwohloka.
Ukufingqa, i-HPMC iyisengezo esibalulekile nesisebenzayo ku-wall putty, edlala indima ebalulekile ekuthuthukiseni impahla elwa nokusaga ye-wall putty. Ngokuqiniswa kwayo, ukulawulwa kwezinga lokumisa, ukuthuthukiswa kokunamathela kanye nezakhiwo zokugcina amanzi, i-HPMC inikeza abakhi isixazululo esisebenzayo sokuxazulula izinkinga futhi ithuthukise ikhwalithi yonke yomkhiqizo wokugcina. Inzuzo ayigcini nje ekuqedeni okubushelelezi, okuzinzile, kodwa futhi ekusebenzeni kwezindleko zesisombululo. Ngakho-ke, kuyadingeka ukuqaphela nokugcizelela indima engenakuthathelwa indawo ye-HPMC embonini yezokwakha.
Isikhathi sokuthumela: Aug-15-2023