I-silicone sealant okanye i-adhesive yimveliso enamandla neguquguqukayo engasetyenziswa kwiindlela ezahlukeneyo. Nangona i-silicone sealant ingekho ngqingqwa njengezinye i-sealants okanye i-adhesives, i-silicone sealant ihlala iguquguquka kakhulu, nokuba sele yomile ngokupheleleyo okanyeunyangiweI-silicone sealant inokumelana namaqondo obushushu aphezulu kakhulu, nto leyo eyenza ukuba ifaneleke kakhulu kwiizicelo ezichaphazeleka bubushushu obuphezulu, njengakwii-gaskets zenjini.
I-silicone sealant eyomisiweyo ibonakalisa ukumelana okuhle kakhulu nemozulu, ukumelana nokwaluphala, ukumelana ne-UV, ukumelana ne-ozone, ukumelana nobushushu obuphezulu nobuphantsi, ukumelana nokungcangcazela, ukumelana nokufuma, kunye neempawu zokuthintela amanzi; ngoko ke, ukusetyenziswa kwayo kubanzi kakhulu. Kwiminyaka yoo-1990, yayisetyenziselwa ukubopha kunye nokuvala kwishishini leglasi, ngoko ke yaziwa ngokuba yi-"glass adhesive".
Umfanekiso ongasentla: I-sealant ye-silicone eyomisiweyo
Umfanekiso wasekhohlo: Ukupakisha iidrama ze-silicone sealant
I-silicone sealant idla ngokusekwe kwi-107 (i-hydroxy-terminated polydimethylsiloxane), kwaye yenziwe ngezinto ezifana nee-polymers ezinobunzima obuphezulu, ii-plasticizers, ii-fillers, ii-cross-linking agents, ii-coupling agents, ii-catalysts, njl. Ii-plasticizers ezisetyenziswa rhoqo ziquka i-silicone oil, i-white oil, njl. Ii-fillers ezisetyenziswa rhoqo ziquka i-nano-activated calcium carbonate, i-heavy calcium carbonate, i-ultrafine calcium carbonate, i-fumed silica, kunye nezinye izinto.
Ii-silicone sealants ziza ngeendlela ezahlukeneyo.
Ngokwendlela yokugcina, yahlulwe yaba ziinxalenye ezimbini (ezininzi) kunye nenxalenye enye.
Iinxalenye ezimbini (ezininzi) zithetha ukuba i-silicone sealant yahlulwe yangamaqela amabini (okanye ngaphezulu kwesibini) iinxalenye A kunye no-B, naliphi na icandelo elinye lodwa alinakwenza i-curing, kodwa emva kokuba iinxalenye ezimbini (okanye ngaphezulu kwesibini) zixutyiwe, ziya kuvelisa i-cross-linking curing reaction yokwenza i-elastomers.
Lo mxube kufuneka wenziwe kwangoko ngaphambi kokuba uwusebenzise, nto leyo eyenza olu hlobo lwe-silicone sealant lube nzima ukulusebenzisa.
I-silicone sealant nayo inokubakho njengemveliso enye, ngaphandle kokuxuba. Uhlobo olunye lwe-silicone sealant yemveliso enye lubizwa ngokubaUbushushu begumbi(RTV). Olu hlobo lwesitywini luqala ukunyangeka kwangoko nje ukuba luvezwe emoyeni – okanye, ngokuchanekileyo, ukufuma emoyeni. Ke ngoko, kuyimfuneko ukuba usebenze ngokukhawuleza xa usebenzisa i-RTV silicone sealant.
I-silicone sealant enecandelo elinye inokwahlulwahlulwa ngokubanzi ibe: uhlobo lwe-deasidi, uhlobo lwe-dealcoholization, uhlobo lwe-deketoxime, uhlobo lwe-deacetone, uhlobo lwe-deamideation, uhlobo lwe-dehydroxylamine, njl. ngokwee-agents ezahlukeneyo ze-crosslinking (okanye iimolekyuli ezincinci ezenziwe ngexesha lokunyanga) ezisetyenzisiweyo. Phakathi kwazo, uhlobo lwe-deasidiification, uhlobo lwe-dealcoholization kunye nohlobo lwe-deketoxime zisetyenziswa kakhulu kwimarike.
Uhlobo lwe-deasidi yi-methyl triacetoxysilane (okanye i-ethyl triacetoxysilane, i-propyl triacetoxysilane, njl.njl.) njenge-arhente yokudibanisa, evelisa i-acetic acid ngexesha lokunyanga, eyaziwa ngokuba yi-"acid glue". Iingenelo zayo zezi: amandla amahle kunye nokucaca, isantya sokupholisa ngokukhawuleza. Iingxaki zezi: ivumba le-acetic acid elicaphukisayo, ukugqwala kweesinyithi.
Uhlobo lwe-Dealcoholization luyi-methyl trimethoxysilane (okanye i-vinyl trimethoxysilane, njl.njl.) njenge-arhente yokudibanisa, inkqubo yayo yokulungisa ivelisa i-methanol, eyaziwa ngokuba yi-"alcohol-type glue". Iingenelo zayo zezi: ukhuseleko lokusingqongileyo, ukungagqwali. Iingxaki: isantya sokucola esicothayo, ixesha lokugcina ixesha lokugcina liphantsi kancinci.
Uhlobo lwe-Deketo oxime yi-methyl tributyl ketone oxime silane (okanye i-vinyl tributyl ketone oxime silane, njl.njl.) njenge-arhente yokudibanisa, evelisa i-butanone oxime ngexesha lokunyibilika, eyaziwa ngokuba yi-"oxime type glue". Iingenelo zayo zezi: akukho vumba likhulu kakhulu, ukunamathela kakuhle kwizinto ezahlukeneyo. Iingxaki: ukugqwala kobhedu.
Ngokwendlela yokusetyenziswa kweemveliso ezahlulwe zibe: isitywina solwakhiwo, isitywina esimelana nemozulu, isitywina somnyango neefestile, ikhonkco lesitywina, isitywina esingatshiyo, isitywina esichasene nokungunda, isitywina sobushushu obuphezulu.
Ngokwemibala yemveliso, amanqaku alandelayo: umbala wendabuko omnyama, iporcelain emhlophe, ecacileyo, isilivere ngwevu iintlobo ezi-4, eminye imibala esinokuyiqhuba ngokweemfuno zabathengi.
Kukho nezinye iintlobo ezahlukeneyo ze-silicone sealant eziphucuke kakhulu kwezobuchwepheshe. Olunye uhlobo, olubizwa ngokubainovelwano kuxinzeleloi-silicone sealant, inamathela ngokusisigxina kwaye inamathela ngoxinzelelo olucwangcisiweyo – ngamanye amazwi, nangona iya kuhlala “inamathela,” ayizukunamathela ukuba into ethile imane iyibetha okanye iphumle. Olunye uhlobo lubizwa ngokubaUV or imitha inyangiwei-silicone sealant, kwaye isebenzisa ukukhanya kwe-ultraviolet ukunyanga i-sealant. Okokugqibela,i-thermoseti-silicone sealant ifuna ukuvezwa kubushushu ukuze inyangeke.
I-silicone sealant ingasetyenziswa kwiindlela ezahlukeneyo zokusebenza. Olu hlobo lwe-sealant lusetyenziswa rhoqo kwiindlela zemoto nakwezinye izinto ezinxulumene noko, njengoncedo lokuvala injini, ngee-gaskets okanye ngaphandle kwazo. Ngenxa yokuguquguquka kwayo okuphezulu, i-sealant ikwayindlela elungileyo kwizinto ezininzi zokuzonwabisa okanye imisebenzi yezandla.
Ixesha lokuthumela: Disemba-29-2023
