Ho thibela ho fafatsa foam ke thepa e sebetsang ka ho fetisisa, e sebetsang hantle haholo e entsoeng ka karabelo ea lik'hemik'hale ea likarolo tse peli tse kholo (polyol resin le isocyanate). Ha li kopantsoe, thepa ena e 'meli e arabela ho etsa foam e pharalletseng ea polyurethane e koalang le ho sireletsa libaka ka katleho. Tlhoko e ntseng e eketseha ea ho thibela ho fafatsa ho sebetsang hantle bakeng sa lits'ebetso tsa bolulo, tsa khoebo le tsa indasteri e lebisitse keketsehong ea ts'ebeliso ea ho thibela ho fafatsa foam e nang le ho thibela ho hoholo, ho hanyetsa mongobo le tšehetso ea sebopeho.
Mokhoa oa ho Sireletsa Foam ka Spray
Tlhahiso ea ho thibela foam e fafalitsoeng e itšetlehile haholo ka tšebelisano-'moho lipakeng tsa li-polyol le li-isocyanate, tse atolohang ho tlatsa sebaka le ho thatafala hore e be foam ea ho thibela ka mor'a ho fafatsa. Leha ho le joalo, ts'ebetso ena e hloka taolo e nepahetseng ho netefatsa hore foam e teteaneng, sebopeho le ho tšoana ho nepahetse. Mona,poliethane sethothetsie bapala karolo ea bohlokoa ho khanneng le ho laola karabelo.
Karolo ea Li-Catalyst Tlhahisong ea Foam ea Polyurethane
Li-catalyst li bohlokoa tlhahisong ea li-polyurethane hobane li eketsa sekhahla sa karabelo haholo 'me li laola nako ea gel, e leng ea bohlokoa bakeng sa ho fihlela katoloso e ntle ea foam. Se-catalyst se ka boela sa laola liketso tsa bobeli, joalo ka karabelo ea metsi, e lokollang khase e hlokahalang ho qala bubble. Tekanyo lipakeng tsa liketso tsena e bohlokoa bakeng sa tlhahiso ea meaho e tšoanang ea foam e nang le sebopeho le thepa e tsitsitseng ea sele. Tlhahisong ea polyurethane, li-catalyst ka kakaretso li arotsoe ka mekhahlelo e 'meli:li-catalyst tsa amineleli-catalyst tsa organometallic(jwalo ka organotin, bismuth, le zinki).
MXC-TMA le MXC-BDMA: Li-Catalyst bakeng sa ho Sireletsa Foam ka Spray
Li-catalystMXC-TMAleMXC-BDMAli na le melemo e totobetseng tlhahisong ea ho thibela ho thijoa ha foam ea spray.MXC-TMAke mokelikeli o se nang 'mala ho isa ho o mosehla o bobebe o khothalletsang ho hlophisoa ha polyisocyanurate ho etsa mothapo o lekanang le o laoloang oa ho phahama. Catalyst e sebelisoa haholo ho li-foam tse thata tse hlokang ho phalla ho ntlafetseng le ho phekoa ho tsitsitseng, 'me ke khetho e ntle bakeng sa lits'ebetso tsa ho thibela ho ruruha tse hlokang botsitso ba sebopeho.
Ka hlakoreng le leng,MXC-BDMA(N, N-dimethylbenzylamine, nomoro ea CAS 103-83-3) ke sesebelisoa sa benzyldimethylamine se sebelisoang haholo lits'ebetsong tsa foam e thata. E eketsa phallo ea foam pele, e etsa masoba a lipululana a tšoanang 'me e netefatsa tlamo e matla ho substrate. Sena se etsa hore MXC-BDMA e lokele litlhoko tsa ho thibela ho ruruha tse sebetsang hantle lits'ebetsong tsa foam ea spray, moo sebopeho sa foam se tsitsitseng, se tšoarellang le se khomarelang se leng bohlokoa.
Qetello
Li-catalyst tsa polyurethane tse kang MXC-TMA le MXC-BDMA li bohlokoa bakeng sa ho fihlela boleng ba thepa ea ho thibela foam ea spray. Thepa ea tsona e ikhethang e lumella taolo e nepahetseng ea ho thehoa ha foam, e netefatsa ts'ebetso e tšepahalang ea ho thibela ho ruruha lits'ebetsong tse fapaneng. Ha tlhoko ea litharollo tsa ho thibela ho ruruha tse bolokang matla e ntse e hola, li-catalyst tsa polyurethane tse tsoetseng pele li ntse li bapala karolo ea bohlokoa ho faneng ka ho thibela ho ruruha ha foam ea spray ea boleng bo holimo le e tšoarellang.
Nako ea poso: Pulungoana-06-2024