Liphanele tsa sandwich li sebelisoa haholo lits'ebetsong tsa kaho le tsa indasteri ka lebaka laho thibela mocheso hantle, matla a mechini le ho hanyetsa mollo. Thepa ea bohlokoa tlhahisong ea bona kefoam ea polyurethane (PU) kapa polyisocyanurate (PIR), e sebetsang e le lera la ho thibela ho ruruha la mantlha. Tshebetso ya foam ena e itshetlehile haholo hodimali-catalyst tsa polyurethanee sebediswang nakong ya tlhahiso.
Sehloohong sena, re tla hlalosamolao-motheo oa li-catalyst tsa polyurethane ka har'a liphanele tsa sandwich, hore na ke hobane'ng ha li le bohlokoa, le kamoo ho khetha catalyst e nepahetseng ho netefatsang boleng le katleho tlhahisong.
Ke EngLi-Catalyst tsa Polyurethane?
Li-catalyst tsa polyurethane keli-accelerator tsa lik'hemik'haletse laolang karabelo pakeng tsali-isocyanateleli-polyoltsamaisong ea polyurethane. Ntle le li-catalyst, karabelo e ne e tla ba butle haholo ebile e sa leka-lekane, e leng se etsang hore ho se khonehe ho hlahisa foam ea boleng bo holimo bakeng sa liphanele tsa sandwich.
Li-catalyst li laola liketso tse peli tse kholo:
- Karabelo ea ho Foroma (Ho Bululela):Karabelo pakeng tsa li-isocyanate le metsi e hlahisa khase ea carbon dioxide, e leng se etsang hore foam e be le sebopeho sa sele.
- Karabelo ea Gelling (Polymerization):Karabelo pakeng tsa li-isocyanate le li-polyol e etsa mokokotlo oa polymer, e fanang ka matla le botsitso.
Ka ho leka-lekanya liketso tsena,li-catalyst tsa polyurethanefumana hore nabongata ba foam, sebopeho sa sele, lebelo la ho fola, le ho khomarelapakeng tsa lifahleho tsa tšepe tsa phanele le karolo e ka hare ea foam.
Molao-motheo oa Li-Catalyst tsa Polyurethane ka Liphanele tsa Sandwich
Ka hare hotlhahiso e tsoelang pele kapa e sa khaotseng ea liphanele tsa sandwich, polyurethane e metsi e kenngoa pakeng tsa lifahleho tse peli tse thata (hangata tšepe kapa aluminium). Li-catalyst tsa polyurethane li netefatsa hore karabelo e etsahala ka lebelo le nepahetseng le ka tatellano e nepahetseng:
- Taolo ea Ka pele:Li-catalyst li liehisa ho bokellana ha viscosity ho lumella foam ho phalla hantle le ho kolobisa bokaholimo ba phanele ka botlalo. Sena se thibela liphoso tse kang likheo kapa ho se khomarele hantle.
- Ho Phahama le Katoloso ea Foam:Li-catalyst li laola tlhahiso ea khase le mothapo oa ho phahama ha foam, li netefatsa botenya bo lekanang ho pholletsa le phanele.
- Phekolo ea Bofelo ba Morao:Li-catalyst li potlakisa polymerization ea ho qetela, li fa phanele matla, botsitso ba litekanyo, le ho hanyetsa ho fetoha ha lintho.
Haholo-holo hoLiphanele tsa sandwich tsa PIR, di-catalyst tsa trimerization di sebediswa ho kgothaletsa ho thehwa ha masale a isocyanurate, a ntlafatsangkhanyetso ea mollo le botsitso ba mochesoSena se bohlokoa bakeng sa diphanele tse sebediswang polokelong ya serame, marulelong, ho kwahela mabota le kahong ya diindasteri.
Melemo ea ho Sebelisa Sekhahla se Nepahetseng sa Polyurethane ho Liphanele tsa Sandwich
- Khomarelo e Ntlafetseng:E netefatsa kamano e matla pakeng tsa foam le lifahleho.
- Profaele e Laoloang ea ho Phahama:E thibela diphoso tse kang ho putlama ha bokaholimo kapa foam e sa lekanang.
- Khanyetso e Ntlafalitsoeng ea Mollo:Li-catalyst tsa PIR li fana ka botsitso bo phahameng ba mocheso.
- Bokgoni bo ntlafetseng ba tlhahiso:Linako tse khutšoanyane tsa ho lokisa li ntlafatsa tlhahiso meleng e tsoelang pele.
- Tshebetso e Lokisitsoeng:Li-catalyst tse fapaneng li ka fetola bongata ba foam, sebopeho sa sele, le thepa ea ho thibela ho ruruha ho fihlela litlhoko tse itseng tsa projeke.
Mefuta e Tloaelehileng ea Li-Catalyst tse Sebelisitsoeng Liphanele tsa Sandwich
- Li-Catalyst tsa Amine:Leka-lekanya liketso tsa foam le gelling, ho netefatsa ho phahama le ho khomarela hantle.
- Li-Catalyst tsa Tšepe (mohlala, letsoai la potasiamo, metsoako ea tin):Potlakisa ho fola le ho ntlafatsa botsitso ba litekanyo.
- Li-Catalyst tsa ho Hloekisa:Khothaletsa ho thehoa ha PIR, ho eketsa ho hanyetsa malakabe le ho fokotsa ho ntšoa ha mosi.
Ka mohlala,li-catalyst tse thehiloeng ho potassium octanoateli sebelisoa haholo liphanele tsa sandwich tsa PIR hobane li fana kats'ebetso e phahameng, taolo e tsitsitseng ea karabelo, le ts'ebetso e ntle ea ho thibela ho ruruha.
Hobaneng Li-Catalyst tsa Polyurethane li le Bohlokoa bakeng sa Liphanele tsa Sandwich
Themolao-motheo oa li-catalyst tsa polyurethane ka har'a liphanele tsa sandwichke holaola lebelo la karabelo, leka-lekanya ho thehoa ha foam, le ho ntlafatsa ts'ebetso ea sehlahisoa sa ho qetelaNtle le di-catalyst, bahlahisi ba ne ba tla tobana le mathata a kang ho kgomarela ho fokolang, thepa e fokolang ya mechini, le boleng bo sa tsitsang ba ho kwahela mocheso.
Ka ho khetha sistimi e nepahetseng ea catalyst, bahlahisi ba ka hlahisaliphanele tsa sandwich tse sebetsang hantletse fihlelang litlhoko tsa sejoale-joale tsa kaho bakeng sabokgoni ba ho boloka matla, polokeho mollong, le ho tšoarella.
Qetello
Liphanele tsa sandwich ke e 'ngoe ea lits'ebetso tse holang ka potlako tsa foam ea polyurethane le polyisocyanurate.tšebeliso ea li-catalyst tsa polyurethaneke habohlokoa ho netefatsa hore liphanele tsena li fihlella se hlokahalangmatla, ho thibela mocheso le ho hanyetsa molloHo utloisisa molao-motheo oa hore na li-catalyst li sebetsa joang ho thusa bahlahisi ho ntlafatsa tlhahiso le ho fana ka liphanele tse fihlelang maemo a machaba.
Haeba o batlali-catalyst tsa polyurethane tsa boleng bo holimo bakeng sa tlhahiso ea liphanele tsa sandwich, k'hamphani ea rona e fana ka mefuta e fapaneng eali-catalyst tsa amine, li-catalyst tsa tšepe, le li-catalyst tsa trimerizatione etselitsoe litsamaiso tse fapaneng tsa foam. Ikopanye le rona kajeno ho ithuta haholoanyane ka moo litharollo tsa rona li ka ntlafatsang tlhahiso ea hau ea liphanele tsa sandwich.
Nako ea poso: Phato-27-2025