Lebitso la Sehlahiswa:polyurethane

Sebopeho sa limolek'hule tsa sehlahisoa:

Lintho tsa Lik'hemik'hale:

Polyurethane (PU), lebitso le felletseng la polyurethane, ke motsoako oa polymer. 1937 ke Otto Bayer le tlhahiso e 'ngoe ea thepa ena. Ho na le mefuta e 'meli e meholo ea polyurethane, mofuta oa polyester le mofuta oa polyether. Li ka etsoa ka polasetiki ea polyurethane (haholo-holo foam), likhoele tsa polyurethane (tse bitsoang spandex Chaena), rabara ea polyurethane le li-elastomers.
Flexible polyurethane haholo-holo sebopeho se nang le thermoplasticity, se nang le botsitso bo betere, ho hanyetsa lik'hemik'hale, ho tiea le thepa ea mochine ho feta foam ea PVC, e nang le phapang e fokolang ea khatello. E na le mohatsela o motle oa mocheso, ho koala molumo, ho hanyetsa ho tsitsipana, le thepa e thibelang chefo. Ka hona, e sebelisoa e le ho paka, ho kenya molumo le lisebelisoa tsa ho sefa. Plastiki e thata ea polyurethane e bobebe, e kenya molumo, ho kenya mocheso o phahameng, ho hanyetsa lik'hemik'hale, thepa e ntle ea motlakase, ho sebetsa habonolo le ho monya metsi a tlase. E sebelisoa haholo-holo e le thepa ea mohaho bakeng sa kaho, koloi, indasteri ea lifofane, ho kenya mocheso le mocheso oa mocheso. Ts'ebetso ea polyurethane elastomer lipakeng tsa polasetiki le rabara, ho hanyetsa oli, ho hanyetsa ho roala, ho hanyetsa mocheso o tlase, ho hanyetsa botsofali, ho thatafala ho phahameng, elasticity. E sebelisoa haholo-holo indastering ea lieta le indastering ea bongaka. Polyurethane e ka boela ea etsoa li-adhesives, li-coatings, letlalo la maiketsetso, joalo-joalo.

Kopo:

Polyurethanes ke e 'ngoe ea lisebelisoa tse sebetsang ka ho fetisisa lefatšeng kajeno. Tšebeliso ea bona e mengata e tloha ho foam e tenyetsehang ka thepa ea ka tlung, ho ea ho foam e thata e le ho kenya letsoho marakong, marulelong le lisebelisoa ho thermoplastic polyurethane e sebelisoang lisebelisoa tsa bongaka le lieta, ho koahela, li-adhesives, sealants le elastomers tse sebelisoang fatše le ka hare ho likoloi. Li-polyurethanes li 'nile tsa sebelisoa ka ho eketsehileng nakong ea lilemo tse mashome a mararo tse fetileng ka mefuta e sa tšoaneng ea lisebelisoa ka lebaka la boiketlo ba tsona, melemo ea litšenyehelo, ho boloka matla le ho utloahala ha tikoloho. Ke lintlha life tse ling tse etsang hore polyurethane e lakatsehe hakaale? Ho tšoarella ha polyurethane ho kenya letsoho haholo bophelong bo bolelele ba lihlahisoa tse ngata. Katoloso ea potoloho ea bophelo ba sehlahisoa le paballo ea lisebelisoa ke lintlha tsa bohlokoa tsa tikoloho tseo hangata li ratang khetho ea polyurethanes[19-21]. Polyurethanes (PUs) e emela sehlopha sa bohlokoa sa li-polymers tsa thermoplastic le thermoset kaha thepa ea bona ea mochini, e futhumatsang le ea lik'hemik'hale e ka hlophisoa ke karabelo ea li-polyol tse fapaneng le poly-isocyanate.