Li-elastomers tsa polyurethane ke tsa li-polymers tse thibelang, ke hore, li-macromolecules tsa polyurethane li entsoe ka "likarolo tse bonolo" le "likarolo tse thata" 'me li etsa sebopeho sa karohano ea micro phase.Likarolo tse thata (tse nkiloeng ho li-isocyanate le li-chain extenders) li qhalakantsoe sebakeng sa karolo e bonolo (e nkiloeng ho li-oligomer polyols) 'me e bapala karolo ea lintlha tse amanang le 'mele.Ka hona, ha li bapisoa le rabara e 'ngoe ea maiketsetso (elastomers), li-elastomer tsa polyurethane li na le matla a betere le ho hanyetsa ho roala, bolelele bo phahameng bo ntse bo ka bolokoa ha boima bo le holimo.
Lisebelisoa tsa elastic polyurethane, tseo ho thoeng ke "nyeoe" linaheng tse ling, haholo-holo li kenyelletsa lihlahisoa tsa setso tsa polyurethane elastomer, tsela ea polasetiki ea polyurethane le lisebelisoa tse ling tse katiloeng, likhomaretsi, li-sealants, li-adhesives, joalo-joalo, tse etsang karolo ea 40 lekholong ea kakaretso ea lihlahisoa tsa polyurethane.Bongata ba lihlahisoa tse phekotsoeng tsa lisebelisoa tsa kesi (lihlahisoa tse thehiloeng metsing le tse thehiloeng ho solvent li tlosa metsi le lihlapolli) ke lisebelisoa tse se nang foam elastic polyurethane.PU synthetic letlalo resin, lira tse ling le likhomaretsi ke lihlahisoa tse thehiloeng ho solvent kapa tse nang le metsi, tseo hape li ka nkuoang e le lisebelisoa tsa polyurethane elastomer ka kutloisiso e pharaletseng.Ka kutloisiso e moqotetsane, polyurethane elastomer e bua ka cast polyurethane elastomer (CPU), thermoplastic polyurethane elastomer (TPU) le e tsoakiloeng ea polyurethane elastomer (MPU), e nkang karolo ea 10% kapa ka tlase hanyane ho kakaretso ea polyurethane.CPU le TPU ke tsona tse ka sehloohong tsa polyurethane elastomers, 'me liphapang tsa tsona li itšetlehile ka lintlha tse kang ts'ebetso ea tlhahiso le chain extender.Mofuta ona oa setso oa polyurethane elastomer, o tsejoang hape e le "polyurethane rabara", ke oa mofuta oa rabara e khethehileng ea maiketsetso.Polyurethane elastomer ea ts'ebetso e phahameng ke thepa e nang le khanyetso e ntle ka ho fetisisa ea ho roala har'a lisebelisoa tsohle tsa maiketsetso tsa polymer.E tsejoa e le "morena oa ho roala resistance".E sebelisoa haholo mafapheng a mangata, 'me lisebelisoa tse ncha li ntse li atoloha.
Li-elastomer tsa polyurethane li ka sebelisoa ho nkela tšepe, lipolasetiki le rabara e tloaelehileng libakeng tse ling.
Ha ho bapisoa le lisebelisoa tsa tšepe, polyurethane elastomer e na le melemo ea boima bo bobebe, lerata le tlase, ho hanyetsa tahlehelo, litšenyehelo tse tlase tsa ho sebetsa le ho hanyetsa kutu ea acid.Ha e bapisoa le li-plastiki, e na le melemo ea boima bo phahameng le ho hanyetsa ho apara ho phahameng.Ha ho bapisoa le rabara e tloaelehileng, polyurethane elastomer e na le melemo ea ho hanyetsa, ho itšeha, ho hanyetsa meokho, matla a phahameng a ho jara, ho hanyetsa ozone, ho etsoa habonolo, ho tšela le ho tšela, le mefuta e mengata ea boima ba 'mele.
Polyurethane elastomer ke mofuta oa bohlokoa oa polyurethane.Hona joale, tšebeliso ea eona e etsa hoo e ka bang 10% ea kakaretso ea tšebeliso ea polyurethane.Polyurethane elastomer e sebelisetsoa ho etsa mefuta eohle ea mabili a rabara, mabanta a conveyor, liphaephe tsa rabara tse sa keneleng metsi le tse hananang le khatello, likhoele tse koalang le mehele, likhetla tsa likhoele le lifilimi tse fapaneng.Lihlahisoa li sebelisoa haholo ka tšepe le tšepe, ho etsa pampiri, merafo, mechine, khatiso le liindasteri tse ling.Polyurethane elastomer e ka fetoloa ke li-polymers tse ling, likhoele, li-filler tsa phofo, joalo-joalo ho fokotsa litšenyehelo le ho ntlafatsa ts'ebetso.
Nako ea poso: May-05-2022