Foam e thata ea polyurethanee sebelisoa haholo ho thepa ea ho thibela mocheso, lisebelisoa tsa sehatsetsing, liphanele tsa moaho, li-spray foam, le liphanele tsa sandwich ka lebaka la ho thibela mocheso hantle le thepa ea mechini. Leha ho le joalo, tlhahisong ea indasteri, e 'ngoe ea liphephetso tse tloaelehileng tseo bahlahisi ba tobanang le tsona keho lokisa butle ha foam e thata ea polyurethaneHo lokisa butle ha ho fokotse feela bokgoni ba tlhahiso empa hape ho ama boleng ba foam, botsitso ba boholo le ho kgomarela.
Sehloohong sena, re tla hlahlobalisosa tse ka sehloohong tsa ho lieha ho foam e thata ea polyurethanele ho fana kalitharollo tse sebetsangbakeng sa bahlahisi.
Lisosa tse Tloaelehileng tsa ho Fola butle ho Polyurethane Rigid Foam
1. Khetho e sa Lokang ea Polyurethane Catalyst
The poliethane sethothetsi e bapala karolo ea bohlokoa ho leka-lekanyengkarabelo ea phumulo(metsi + isocyanate → CO₂) lekarabelo ea gelling(polyol + isocyanate → urethane). Haeba sistimi ea catalyst e sa khethoa hantle kapa tekanyo e sa lekana, lebelo la ho folisa le tla fokotseha.
- Li-catalyst tsa aminelaola haholo-holo karabelo ea foam.
- Li-catalyst tsa tšepe (joalo ka letsoai la tin le potassium) li potlakisa ts'ebetso ea ho etsa gelling le ho lokisa.
Ho se leka-lekane pakeng tsa tsena tse peli ho ka lebisa habonolo hoho fola butle ha foam e thata.
2. Mocheso o Tlase oa Boemo bo Tlase kapa oa Lintho tse Tala
Likarabelo tsa polyurethane li itšetlehile haholo ka mocheso. Haeba mocheso oa tikoloho kapa mocheso oa thepa e tala o le tlase haholo, sekhahla sa karabelo se fokotseha haholo, e leng se lebisang ho nako e telele ea ho fola.
3. Index e fosahetseng ea Isocyanate
Tekanyo ea isocyanate (karolelano ea NCO/OH) e lokela ho laoloa ka hloko. Tekanyo e tlase e fella ka ho se kopane ho sa lekaneng le ho fola butle. Ka lehlakoreng le leng, index e phahameng haholo e ka baka ho robeha empa hangata e potlakisa ho fola.
4. Metsi a mangata haholo tsamaisong
Metsi ke sesebelisoa se tloaelehileng sa ho foka lits'ebetsong tsa foam e thata ea polyurethane. Leha ho le joalo, metsi a mangata haholo a eketsa tlhahiso ea CO₂, a liehisa ho fola, 'me a ka baka ho putlama ha foam kapa kabo e sa lekanang ea bongata.
5. Lisebelisoa tse sa Tsamaellaneng kapa Li-Surfactant
Ho se lumellane hantle hali-surfactant, dithibela-mollo, kapa ditlatsetso tse ding tse nang le ditsamaiso tsa polyol di ka sitisa ho leka-lekana ha ho fola, e leng se fellang kaho thatafatsa butlele sebopeho se fosahetseng sa foam.
Litharollo tsa ho Ntlafatsa Lebelo la ho Fola la Polyurethane Rigid Foam
1. Ntlafatsa Sistimi ea Catalyst
- Khethali-catalyst tsa polyurethane tse leka-lekanengtse netefatsang hore ho foamisa le ho ntsha jeli ho tswela pele ka lebelo le nepahetseng.
- Kopanyali-catalyst tsa amineleli-catalyst tsa tšepe(jwalo ka dibutyltin dilaurate, potassium octanoate, kapa tertiary amines) ho fihlella pholiso e tshwanang le e laolehang.
- Fetola tekanyo ea catalyst ho latela mocheso le mokhoa oa ho e etsa.
2. Taolo ea Mocheso oa Ts'ebetso
- Chesa thepa e tala mochesong o khothaletsoang oa ts'ebetso (hangata 20-25°C).
- Boloka maemo a sebaka sa mosebetsi sebakeng se loketseng.
3. Fetola Index ea Isocyanate
- Lokisa karolelano ea NCO/OH ho leka-lekanya ts'ebetso ea ho sebetsa le foam.
- Etsa liteko tse nyane pele ho tlhahiso e kgolo ho qoba mathata a boleng.
4. Laola Boteng ba Metsi
- Boloka metsi a le ka har'a moeli o khothaletsoang oa tlhahiso.
- Qoba ho eketsa metsi a mangata haholo a liehang ho fola le ho ama botsitso ba foam.
5. Netefatsa ho lumellana ha lintho tse ling
- Khethali-surfactant tsa silicone tsa boleng bo holimotse tsitsisang sebopeho sa sele le ho ntlafatsa ho tšoana ha ho fola.
- Sebelisa lintho tse thibelang malakabe le lintho tse tlatsang tse sa sitiseng karabelo ea polyurethane.
Qetello
Theho lokisa butle ha foam e thata ea polyurethanehangata e bakoa ke khetho e fosahetseng ea catalyst, mocheso o tlase, index e fosahetseng ea isocyanate, metsi a mangata, kapa ho se lumellane hantle ha li-additives.ho ntlafatsa litsamaiso tsa catalyst, ho laola maemo a tshebetso, le ho kgetha di-additi tse tsamaellanang, bahlahisi ba ka ntlafatsa haholo lebelo la ho fola, boleng ba foam, le bokgoni ba tlhahiso.
At Lisebelisoa tse Ncha tsa Mingxu, re ntse re ikhethile katlhahiso ea foam e thata ea polyurethaneka lilemo tse fetang 20. Re fana kali-catalyst tsa polyurethane tse ikhethileng, li-surfactant, le tataiso ea botekgenikiho thusa bareki ho rarolla mathata a sebetsang tlhahisong ea foam.
Re amohela balekane ba indasteri ka mofuthu hofapanyetsana mehopolo, ithute ho tsoa ho e mong le e mong, 'me le kenye letsoho hammoho ntlafatsong e tsitsitseng ea indasteri ea foam e thata ea polyurethane.
Nako ea poso: Loetse-10-2025