Sealant e bua ka thepa ea ho tiisa e senyehang ka sebopeho sa bokaholimo ba tiiso, ha ho bonolo ho phalla, 'me e na le sekhomaretsi se itseng.
Ke sekhomaretsi se sebelisetsoang ho tlatsa likheo tsa tlhophiso bakeng sa ho tiisa. E na le mesebetsi ea ho thibela ho lutla, ho thibela metsi, ho thibela ho sisinyeha, ho thibela molumo le ho thibela mocheso. Hangata, lisebelisoa tsa viscous tse omeletseng kapa tse sa omeletseng tse kang asphalt, resin ea tlhaho kapa resin ea maiketsetso, rabara ea tlhaho kapa rabara ea maiketsetso e sebelisoa e le lisebelisoa tsa motheo, 'me li-filler tse se nang metsi tse kang talc, letsopa, carbon black, titanium dioxide le asbestos lia eketsoa. Li-plasticizers, solvents, pheko ea meriana, li-accelerator, joalo-joalo E ka aroloa ka mekhahlelo e meraro: elastic sealant, liquid sealing gasket le sealing putty. E sebelisoa haholo ha ho tiisoa ha mohaho, lipalangoang, lisebelisoa tsa elektronike le likarolo.
Ho na le mefuta e mengata ea li-sealants: li-silicone sealants, polyurethane sealants, polysulfide sealants, acrylic sealants, anaerobic sealants, epoxy sealants, butyl sealants, neoprene sealants, PVC sealants, le asphalt sealants.
Lintho tse ka sehloohong tsa sealant
(1) Ponahalo: Ponahalo ea sealant e khethoa haholo-holo ke ho hasana ha ho tlatsa setsing. Filler ke phofo e tiileng. Ka mor'a ho qhalakanngoa ke kneader, grinder le mochine oa polanete, e ka qhalakanngoa ka ho lekana ka rabara ea motheo ho etsa pente e ntle. Chelete e nyane ea likotlo tse nyane kapa lehlabathe lia amoheleha ebile li tloaelehile. Haeba filler e sa hasane hantle, ho tla hlaha likaroloana tse ngata tse mahoashe. Ntle le ho qhalakanngoa ha li-fillers, lintlha tse ling li tla ama ponahalo ea sehlahisoa, joalo ka ho kopanya litšila tse nang le likaroloana, li-crusting, joalo-joalo. Linyeoe tsena li nkoa li le thata ka ponahalo.
(2) Ho thatafala
(3) Matla a ho tiea
(4) Ho lelefatsa
(5) Tensile modulus le bokhoni ba ho falla
(6) Ho khomarela ho substrate
(7) Extrusion: Ena ke ts'ebetso ea ho haha sealant ntho e sebelisoang ho bontša bothata ba sealant ha se sebelisoa. Sekhomaretsi se teteaneng haholo se tla ba le extrudability e fokolang, 'me ho tla ba boima haholo ho sekhomaretsi ha se sebelisoa. Leha ho le joalo, haeba sekhomaretsi se entsoe se le tšesaane haholo ho nahanoa feela ka extrudability, se tla ama thixotropy ea sealant. The extrudability e ka lekanyetsoa ka mokhoa o boletsoeng ho maemo a naha.
(8) Thixotropy: Ena ke ntho e 'ngoe ea ts'ebetso ea kaho ea sealant. Thixotropy ke se fapaneng le sa fluidity, e leng se bolelang hore sealant e ka fetola sebopeho sa eona feela tlas'a khatello e itseng, 'me e ka boloka sebōpeho sa eona ha ho se na matla a ka ntle. sebopeho ntle le ho phalla. Boikemisetso ba sag e boletsoeng ke tekanyetso ea naha ke kahlolo ea thixotropy ea sealant.
Nako ea poso: Nov-04-2022