Polyurethane (PU), iyo yakazara zita re polyurethane, inhengo yepolymer.Yakagadzirwa naOtto Bayer muna 1937. Polyurethane yakakamurwa kuva mapoka maviri: polyester type uye polyether type.Anogona kugadzirwa kuva mapurasitiki epolyurethane (kunyanya mapurasitiki ane furo), polyurethane fibers (inonzi spandex kuChina), polyurethane rubber uye elastomers.

Yakapfava polyurethane inonyanya kuve thermoplastic linear chimiro, iyo ine kugadzikana kuri nani, makemikari kuramba, kusimba uye michina zvivakwa kupfuura PVC furo zvinhu, uye ine kushoma compression deformation.Iyo ine yakanaka yekupisa yekupisa, kuvharidzira inzwi, kushomeka kuramba uye anti-virus kuita.Naizvozvo, inoshandiswa sekurongedza, kuvharidzira ruzha, sefa zvinhu.

Rigid polyurethane plastiki ine huremu huremu, yakanakisa mukudzivirira kwekurira uye kupisa kwemafuta, makemikari kuramba, yakanaka magetsi emagetsi, kugadzirisa nyore, uye kunyura kwemvura.Inonyanya kushandiswa mukuvaka, mota, indasitiri yendege, thermal insulation structural zvinhu.Zvinhu zve polyurethane elastomers zviri pakati pepurasitiki nerabha, mafuta kuramba, kupfeka kuramba, kushomeka kwekushisa, kuramba kuchembera, kuoma kwakanyanya uye elasticity.Inonyanya kushandiswa muindasitiri yeshangu uye indasitiri yezvokurapa.Polyurethane inogona zvakare kushandiswa kugadzira anonamira, machira, synthetic dehwe, nezvimwe.

Polyurethane yakaonekwa muma1930s.Mushure memakore anoda kusvika makumi masere ekuvandudzwa kwetekinoroji, chinyorwa ichi chave kushandiswa zvakanyanya mumunda wemidziyo yepamba, kuvaka, zvinodiwa zvezuva nezuva, zvekufambisa, uye midziyo yemumba.

Declaration:Zvimwe zvemukati zvinobva kuInternet, uye kwakabva kwacherechedzwa.Izvo zvinongoshandiswa kuratidza chokwadi kana maonero anotaurwa muchinyorwa chino.Izvo ndezvekutaurirana uye kudzidza chete, uye hazvisi zvezvimwe zvekutengeserana zvinangwa.Kana pane chero kukanganisa, tapota taura nesu kuti tibvise pakarepo.