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, moo likarolo tse thata (ho tloha ho isocyanates le li-chain extenders) li qhalakantsoeng ka har'a bonolo. sebaka sa karolo (ho tloha ho oligomer polyols) ho bapala karolo ea lintlha tse hokahanyang.Ka hona, ha li bapisoa le liraba tse ling tsa maiketsetso (elastomers), li-elastomers 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, tse bitsoang "CASE" kantle ho naha, haholo-holo li kenyelletsa lihlahisoa tsa setso tsa polyurethane elastomer, lisebelisoa tsa ho betla joalo ka litselana tsa polasetiki tsa polyurethane, likhomaretsi tse sa keneleng metsi, likhomaretsi, li-sealants, likhomaretsi tsa pitsa, joalo-joalo, li nka karolo ea 40% ea kakaretso ea chelete eohle lihlahisoa tsa polyurethane.Bongata ba lihlahisoa tse phekotsoeng tsa thepa ea CASE (lihlahisoa tse thehiloeng metsing le tse thehiloeng ka mokelikeli ka mor'a ho tlosa metsi le metsoako) 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 thehiloeng metsing, tseo hape li ka nkuoang e le lisebelisoa tsa polyurethane elastomer ka kutloisiso e pharaletseng.Ka kutloisiso e moqotetsane, li-elastomer tsa polyurethane li bua ka li-elastomers tsa polyurethane (CPU), thermoplastic polyurethane elastomers (TPU) le li-elastomers tse tsoakiloeng tsa polyurethane (MPU), tse nkang karolo ea 10% kapa ka tlase hanyane ho palo eohle ea polyurethane.CPU le TPU ke tsona tse ka sehloohong tsa polyurethane elastomers, 'me liphapang tsa tsona li teng molemong oa tlhahiso le li-extensions tsa ketane.Mofuta ona oa setso oa polyurethane elastomer, o tsejoang hape e le "polyurethane rabara", ke oa mofuta o khethehileng oa rabara ea maiketsetso.Polyurethane elastomer e sebetsang hantle ka ho fetisisa ke thepa e sa sebetseng hantle ka ho fetesisa har'a lisebelisoa tsohle tsa maiketsetso tsa polymer, tse tsejoang ka hore ke "morena oa ho hanyetsa" mme e sebelisoa haholo libakeng tse ngata, 'me lits'ebetso tse ncha li ntse li atoloha.
Polyurethane elastomer e ka sebelisoa ho nkela tšepe, polasetiki 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 ho roala, 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 ho jara, ho hanyetsa ozone, joalo-joalo, 'me e bonolo ho e etsa, e ka tšeloa ka pitsa, ea tšeloa,' me e na le mefuta e mengata e thata.
Nako ea poso: Feb-14-2023