Chomatira cha silicone kapena chomatira ndi chinthu champhamvu komanso chosinthasintha chomwe chingagwiritsidwe ntchito m'njira zosiyanasiyana. Ngakhale kuti chomatira cha silicone si champhamvu ngati zomatira zina, chomatira cha silicone chimakhala chosinthasintha kwambiri, ngakhale chikauma kwathunthu kapenawochiritsidwaSilicone sealant imatha kupirira kutentha kwambiri, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pa kutentha kwambiri, monga pa ma gasket a injini.
Chophimba cha silicone chokonzedwa bwino chimatha kupirira nyengo yabwino kwambiri, kukana ukalamba, kukana UV, kukana ozone, kukana kutentha kwambiri, kukana kugwedezeka, kukana chinyezi, komanso kukana madzi; chifukwa chake, ntchito zake ndi zambiri. M'zaka za m'ma 1990, nthawi zambiri chinkagwiritsidwa ntchito pomangirira ndi kutseka magalasi, kotero chimadziwika kuti "guluu lagalasi."
Chithunzi chapamwamba: Chophimba cha silicone chokonzedwa bwino
Chithunzi chakumanzere: Kulongedza ng'oma ya silicone sealant
Silicone sealant nthawi zambiri imachokera ku 107 (hydroxy-terminated polydimethylsiloxane), ndipo imapangidwa ndi zinthu monga ma polima olemera kwambiri, ma plasticizer, ma filler, ma cross-linking agents, ma coupling agents, ma catalysts, ndi zina zotero. Ma plasticizers omwe amagwiritsidwa ntchito nthawi zambiri amaphatikizapo mafuta a silicone, mafuta oyera, ndi zina zotero. Ma fillers omwe amagwiritsidwa ntchito nthawi zambiri amaphatikizapo nano-activated calcium carbonate, heavy calcium carbonate, ultrafine calcium carbonate, fumed silica, ndi zina zotero.
Ma silicone sealants amapezeka m'njira zosiyanasiyana.
Malinga ndi mtundu wa malo osungira, amagawidwa m'magulu awiri (ambiri) ndi gawo limodzi.
Zigawo ziwiri (zambiri) zikutanthauza kuti silicone sealant ikagawidwa m'magulu awiri (kapena kuposerapo ziwiri) A ndi B, gawo lililonse lokha silingathe kupanga kuchiritsa, koma zigawo ziwirizo (kapena kuposerapo ziwiri) zikasakanizidwa, zimapanga cross-linking curing reaction kuti ipange elastomers.
Chosakanizacho chiyenera kupangidwa nthawi yomweyo musanachigwiritse ntchito, zomwe zimapangitsa kuti mtundu uwu wa silicone sealant ukhale wovuta kugwiritsa ntchito.
Chosindikizira cha silicone chingakhalenso chinthu chimodzi, popanda kusakaniza. Mtundu umodzi wa chosindikizira cha silicone chopangidwa ndi chinthu chimodzi umatchedwaKutentha kwa Chipinda Kuwononga(RTV). Mtundu uwu wa sealant umayamba kuchira ukangowonekera mumlengalenga - kapena, molondola, chinyezi chomwe chili mumlengalenga. Chifukwa chake, ndikofunikira kuti mugwire ntchito mwachangu mukamagwiritsa ntchito RTV silicone sealant.
Chosindikizira cha silicone chokhala ndi gawo limodzi chingagawidwe m'magulu awiri: mtundu wa deacidification, mtundu wa dealcoholization, mtundu wa deketoxime, mtundu wa deacetone, mtundu wa deamideation, mtundu wa dehydroxylamine, ndi zina zotero. malinga ndi zinthu zosiyanasiyana zolumikizirana (kapena mamolekyu ang'onoang'ono opangidwa panthawi yopopera) zomwe zimagwiritsidwa ntchito. Pakati pawo, mtundu wa deacidification, mtundu wa dealcoholization ndi mtundu wa deketoxime zimagwiritsidwa ntchito kwambiri pamsika.
Mtundu wa deacidification ndi methyl triacetoxysilane (kapena ethyl triacetoxysilane, propyl triacetoxysilane, ndi zina zotero) monga cholumikizira, chomwe chimapanga acetic acid panthawi yokonza, yomwe imadziwika kuti "acid glue". Ubwino wake ndi: mphamvu yabwino komanso kuwonekera bwino, liwiro lokonza mwachangu. Zoyipa zake ndi izi: fungo loyipa la acetic acid, dzimbiri la zitsulo.
Mtundu wa dealcoholization ndi methyl trimethoxysilane (kapena vinyl trimethoxysilane, ndi zina zotero) ngati wothandizira wolumikizirana, njira yake yophikira imapanga methanol, yomwe imadziwika kuti "guluu wamtundu wa mowa". Ubwino wake ndi: kuteteza chilengedwe, kusawononga. Zoyipa: liwiro lozizira pang'onopang'ono, nthawi yosungiramo zinthu ndi yochepa.
Mtundu wa Deketo oxime ndi methyl tributyl ketone oxime silane (kapena vinyl tributyl ketone oxime silane, ndi zina zotero) monga cholumikizira cholumikizira, chomwe chimapanga butanone oxime panthawi yowuma, yomwe imadziwika kuti "guluu wa mtundu wa oxime". Ubwino wake ndi: palibe fungo lalikulu, kumamatira bwino kuzinthu zosiyanasiyana. Zoyipa: dzimbiri la mkuwa.
Malinga ndi kugwiritsa ntchito zinthu zomwe zagawidwa m'magulu awiri: chosindikizira chomangidwa, chosindikizira chosagwira nyengo, chosindikizira chitseko ndi zenera, cholumikizira chosindikizira, chosindikizira chosagwira moto, chosindikizira chotsutsana ndi mildew, chosindikizira kutentha kwambiri.
Malinga ndi mtundu wa chinthucho, titha kuyika mfundo: mtundu wamba wakuda, woyera wa porcelain, wowonekera, imvi yasiliva mitundu 4, mitundu ina yomwe tingachite malinga ndi zosowa za makasitomala.
Palinso mitundu ina yosiyanasiyana ya silicone sealant yotsogola kwambiri paukadaulo. Mtundu umodzi, wotchedwakukhudzidwa ndi kupanikizikasilicone sealant, imakhala yolimba nthawi zonse ndipo imamatirira mwadala - mwa kuyankhula kwina, ngakhale kuti nthawi zonse imakhala "yomata," siimamatirira ngati china chake chingoyima kapena kuyima mopingasa. Mtundu wina umatchedwaUV or kuchiritsa kwa chezasilicone sealant, ndipo imagwiritsa ntchito kuwala kwa ultraviolet pochiritsa sealant. Pomaliza,thermosetsilicone sealant imafuna kutentha kuti ichoke.
Chotsekera cha silicone chingagwiritsidwe ntchito m'njira zosiyanasiyana. Mtundu uwu wa chotsekera umagwiritsidwa ntchito nthawi zambiri m'magalimoto ndi ntchito zina zokhudzana nazo, monga chothandizira kutseka injini, yokhala ndi ma gasket kapena yopanda. Chifukwa cha kusinthasintha kwake kwapamwamba, chotsekeracho ndi chisankho chabwino pa zosangalatsa zambiri kapena zaluso.
Nthawi yotumizira: Disembala-29-2023
