Li-catalyst tsa polyurethane (PU) li bohlokoa haholo tlhahisong ea lihlahisoa tse fapaneng tsa polyurethane, ho kenyeletsoa le li-foam tsa lisele tse koetsoeng. Jwalo ka mofani ea ka sehloohong oa li-catalyst tsa polyurethane, re utloisisa karolo ea bohlokoa eo li-catalyst tsena li e bapalang ho ntlafatseng thepa le ts'ebeliso ea li-foam tsa lisele tse koetsoeng.
Ho Utloisisa Foam ea Sele e Koetsoeng
Foam e koetsoeng ke mofuta oa foam moo lipokotho tsa khase li koaletsoeng ka botlalo ke thepa e tiileng, e leng se etsang sebopeho se ts'oanang. Ho fapana le foam e bulehileng ea sele, moo lisele li hokahaneng, foam e koetsoeng ea sele e khetholloa ka ho ba le boima bo phahameng le ho tiea ha eona. Sebopeho sena se ikhethang se e fa litšobotsi tse 'maloa tse molemo, tse kang ho monya metsi a tlase, boleng bo phahameng ba ho thibela mocheso, le matla a matle haholo.
Tšebeliso ea Foam ea Sele e Koetsoeng
Foam e koetsoeng e sebelisoa haholo liindastering tse fapaneng ka lebaka la thepa ea eona e feto-fetohang. Tse ling tsa lits'ebetso tsa eona tsa mantlha ke tsena:
1. Ho thibela mocheso: Ka lebaka la ho hanyetsa mocheso haholo le ho kenella ha mongobo o tlase, foam ea sele e koetsoeng e sebelisoa haholo ho thibela mocheso oa moaho. E thusa ho fokotsa litšenyehelo tsa matla ka ho boloka mocheso o tsitsitseng ka har'a mehaho.
2. Sephutheloana: Matla a foam le thepa ea ho e boloka e etsa hore e be ntle bakeng sa ho paka lintho tse bonolo le tsa boleng bo holimo. E fana ka tšireletso e ntle khahlanong le ho thothomela le ho sisinyeha.
3. Kaho: Kaho, foam ea sele e koetsoeng e sebelisoa bakeng sa marulelo, fatše le ho thibela lebota. Botšepehi ba eona ba sebopeho bo eketsa matla thepa ea kaho, 'me thepa ea eona e hanelang mongobo e thibela kholo ea hlobo le hlobo.
4. Likoloi: Foam e koetsoeng ea sele e sebelisoa indastering ea likoloi bakeng sa ho thibela molumo le ho thibela mocheso. E ntlafatsa boiketlo le polokeho ea likoloi ka ho fokotsa lerata le ho boloka taolo ea mocheso.
5. Lebopong la lewatle: Lefapheng la lewatle, foam ya sele e kwetsweng e ananelwa ka lebaka la ho phaphamala ha yona le ho hanela metsi. E sebediswa disebedisweng tsa ho phaphamala, dikepe tsa sekepe, le dikoung ho netefatsa ho tshwarella le polokeho ditshebedisong tse thehilweng metsing.
Li-Catalyst tsa Polyurethane ho Ts'ebetso ea Foam ea Sele e Koetsoeng
Ho kopanngoa ha foam ea polyurethane ea lisele tse koetsoeng ho itšetlehile ka tšebeliso ea li-catalyst tse itseng ho laola sekhahla sa karabelo ea likarolo tsa polyol le isocyanate. Khetho ea catalyst e ama haholo thepa ea foam, ho kenyeletsoa sebopeho sa sele ea eona, bongata le ts'ebetso ka kakaretso.
1. Li-Catalyst tsa Amine: Li-catalyst tsa amine li sebelisoa hangata tlhahisong ea foam ea sele e koetsoeng. Li potlakisa karabelo lipakeng tsa isocyanate le moemeli oa ho foka, ho netefatsa sebopeho se tšoanang sa sele le bongata bo lakatsehang. Mehlala e kenyelletsa triethylenediamine (TEDA) le dimethylcyclohexylamine (DMCHA).
2. Li-Catalyst tsa Tšepe: Li-catalyst tse thehiloeng tšepeng, tse kang tse nang le tin kapa bismuth, le tsona li sebelisoa ho ntlafatsa ts'ebetso ea polymerization. Li-catalyst tsena li thusa ho fihlela karabelo e leka-lekaneng, e leng se fellang ka foam e nang le thepa e tsitsitseng le botsitso bo ntlafetseng.
3. Disebediswa tse Fokang: Le hoja e se disebediswa tse fokang ka kutlwisiso ya setso, disebediswa tse fokang jwalo ka metsi kapa di-hydrofluorocarbon (di-HFC) di bapala karolo ya bohlokwa ho theheng sebopeho sa sele e kwetsweng. Ha di kopantswe le disebediswa tse loketseng, di netefatsa ho thehwa ha disele tse kwetsweng tse tshwanang le tse tsitsitseng.
Qetello
Jwalo ka mofani wa dikhasete tsa polyurethane, re lemoha bohlokwa ba ho kgetha dikhasete tse nepahetseng bakeng sa tlhahiso ya foam ya sele e kwetsweng ya boleng bo hodimo. Ho tenyetseha ha foam ya sele e kwetsweng, hammoho le ho nepahala ho fanwang ke dikhasete tse ikgethang tsa polyurethane, ho etsa hore e be thepa ya bohlokwa ho pholletsa le diindasteri tse fapaneng. Ka ho utlwisisa ditshebetso le mekgwa ya ho kopanya, re ka tswela pele ho qapa le ho fana ka ditharollo tse fihlelang ditlhoko tse ntseng di fetoha tsa bareki ba rona.
Nako ea poso: Phuptjane-12-2024