Boto ea sandwich ke thepa ea kaho e feto-fetohang e nang le mekhahlelo e meraro: mekhahlelo e 'meli ea ka ntle (kapa liphetho) le thepa ea lera la mantlha bohareng. E 'ngoe ea thepa e tloaelehileng ea lera la mantlha ke foam ea polyurethane (PU), e nang le litšobotsi tse ntle tsa ho thibela mocheso le tšehetso ea sebopeho. Lera la mantlha hangata le kenngoa lipakeng tsa liphetho tse thata, tseo hangata li entsoeng ka tšepe, polasetiki, kapa thepa e kopantsoeng e matlafalitsoeng ka faeba e eketsang matla le ho tšoarella ha phanele. Likarolo tsa bohlokoa tlhahisong ea mekhahlelo ea mantlha ea foam ea polyurethane e sebetsang hantle bakeng sa liphanele tsa sandwich ke li-catalyst tsa polyurethane, tse kang MXC-15 le MXC-37.
Hobaneng ho sebelisoa foam ea polyurethane?
Li-core tsa foam tsa polyurethane li sebelisoa haholo liphanele tsa sandwich ka lebaka la boleng ba tsona bo botle ba ho thibela mocheso (boleng bo phahameng ba R), tlhaho e bobebe, le tšehetso ea sebopeho. Liphanele tsena li sebelisoa hangata liindastering moo ho thibela mocheso le botšepehi ba sebopeho li leng bohlokoa, joalo ka:
- Kaho: Thepa ea mantlha e fana ka tšireletso e ntle ea mocheso, e leng se etsang hore mehaho e boloke matla a mangata. Mohlala, ha re ne re sebetsa setsing sa polokelo se batang, liphanele tsa sandwich tse sireletsang mocheso li ile tsa fokotsa litšenyehelo tsa matla haholo ka ho boloka mocheso o tsitsitseng.
- Sehatsetsing le Polokelo e Batang: Libakeng tsa polokelo tse batang, boleng bo phahameng ba ho thibela mocheso bo bohlokoa ho boloka mocheso o tlase.Ho hanyetsa mocheso ha foam ea polyurethane ho etsa hore e be khetho e pharaletseng bakeng sa likamore tse batang le li-unit tsa sehatsetsing.
- Lifofane le Likepe tsa Leoatle: Litšebelisong tsa lifofane le tsa likepe, tekano pakeng tsa boima le matla e bohlokoa haholo. Liphanele tsa sandwich tse nang le li-core tsa foam tsa PU li fana ka tšehetso e hlokahalang ea sebopeho ha li ntse li fokotsa boima.
Karolo eaLi-Catalyst tsa Polyurethane
Li-catalyst tsa polyurethane, tse kang MXC-15 le MXC-37, li bohlokoa karabelong ea foam nakong ea tlhahiso ea li-cores tsa foam tsa polyurethane. Li-catalyst tsena li potlakisa liketso tsa lik'hemik'hale lipakeng tsa polyol le isocyanate, e leng se nolofalletsang ho thehoa ha foam e tsitsitseng e nang le thepa e lakatsehang.
MXC-15: Ke sesebelisoa sa isocyanurate se theko e tlase le se sebetsang hantle se nang le sekhahla se phahameng sa phetoho. Se loketse sebopeho sa polyol se nang le viscosity e ngata, se khothalletsa karabelo ea isocyanate, ts'ebetso e phahameng, se sebelisoa haholo bakeng sa foam e thata ea PU, ho kenyeletsoa foam ea spray, foam ea PIR, sistimi ea foam ea PIR.
MXC-37: E tsejoang hape e le DMAEE, ho eketsa DMAEE ho polymer ho fokotsa monko oa amine o atisang ho fumanoa lifomong. E ka sebelisoa e le catalyst e kholo feela kapa e le cocatalyst ho fokotsa ts'ebeliso ea li-catalyst tsa foam tsa BDMAEE. Bakeng sa li-stabilizer tse thehiloeng ho ester, foam e bonolo, foam ea microcellular, elastomer, RIM le RRIM, le lits'ebetso tse thata tsa ho paka foam.
Melemo ea Foam ea Polyurethane ka har'a Liphanele tsa Sandwich
- Ho Sireletsa ho Phahameng (Boleng ba R): Foam ea polyurethane e na le e 'ngoe ea boleng bo holimo ka ho fetisisa ba R ka intshi ha e bapisoa le lisebelisoa tse ling tsa ho futhumatsa. Sena se etsa hore liphanele tsa sandwich tse nang le li-core tsa foam tsa PU li boloke matla haholo.
- E bobebe ebile e tšoarella: Li-core tsa foam tsa PU li fokotsa boima ba phanele ea sandwich ka kakaretso ntle le ho fokotsa matla, e leng se etsang hore li be ntle bakeng sa lits'ebetso moo ho fokotsa boima ba 'mele e leng ntho ea bohlokoa.
- Ho hanyetsa mongobo le mollo: Foam ea polyurethane e ka etsoa ka lintho tse eketsang ho eketsa ho lieha ha mollo le ho hanyetsa mongobo, ho ntlafatsa polokeho le bolelele ba nako ea liphanele tsa sandwich libakeng tse fapaneng.
- Botenya le Matla a ka Iketsetsoang: Ka ho fetola sebopeho le dikhatahoathara, bahlahisi ba ka hlahisa diforo tse nang le bongata bo fapaneng le thepa ya mechini, e leng se dumellang diphanele tsa sandwich ho fihlela ditlhoko tse ikgethang tsa tshebediso.
Qetello
Li-catalyst tsa polyurethane tse kang MXC-15 le MXC-37 li bohlokoa haholo tlhahisong ea li-cores tsa foam tsa polyurethane tse sebetsang hantle bakeng sa liphanele tsa sandwich. Li-catalyst tsena li netefatsa hore foam e fihlela litlhoko tse lakatsehang, tse kang boleng bo phahameng ba ho thibela mocheso, matla a sebopeho le ho tšoarella. Ho ikamahanya le maemo ha foam ea polyurethane, hammoho le ho nepahala ha li-catalyst tsa sejoale-joale, ho tiisitse sebaka sa eona liindastering tse tlohang kahong ho isa sehatsetsing, likoloing le lifofaneng. Ka boqapi ba mekhoa ea li-catalyst, bahlahisi ba ka tsoela pele ho ntlafatsa ts'ebetso le botsitso ba liphanele tsa sandwich.
Nako ea poso: Tshitwe-12-2024