Zogulitsa

Polyurethane (PU), dzina lonse ndi polyurethane, ndi polima pawiri.Linapangidwa ndi Otto Bayer mu 1937.Polyurethane imagawidwa m'magulu awiri: mtundu wa polyester ndi polyether mtundu.Zitha kupangidwa kukhala mapulasitiki a polyurethane (makamaka mapulasitiki okhala ndi thovu), ulusi wa polyurethane (wotchedwa spandex ku China), mphira wa polyurethane ndi elastomers.

Soft polyurethane makamaka ndi thermoplastic linear structure, yomwe imakhala ndi kukhazikika bwino, kukana kwa mankhwala, kulimba mtima komanso makina amakina kuposa zida za thovu la PVC, ndipo imakhala ndi kupindika pang'ono.Ili ndi kutchinjiriza bwino kwamafuta, kutsekereza kwamawu, kukana kugwedezeka komanso magwiridwe antchito a anti-virus.Chifukwa chake, imagwiritsidwa ntchito ngati kuyika, kutsekereza mawu, zinthu zosefera.

Pulasitiki yolimba ya polyurethane ndi yopepuka, yodziwika bwino pakutchinjiriza mawu komanso kutsekemera kwamafuta, kukana mankhwala, mphamvu zamagetsi zamagetsi, kukonza kosavuta, komanso kuyamwa kwamadzi otsika.Amagwiritsidwa ntchito kwambiri pomanga, magalimoto, makampani oyendetsa ndege, zida zopangira matenthedwe.

Kuchita kwa polyurethane elastomer kuli pakati pa pulasitiki ndi mphira, kukana kwamafuta, kukana kuvala, kukana kutentha, kukana kukalamba, kulimba kwambiri komanso kulimba.Amagwiritsidwa ntchito makamaka m'makampani a nsapato ndi mafakitale azachipatala.Polyurethane itha kugwiritsidwanso ntchito kupanga zomatira, zokutira, zikopa zopangira, etc.

Polyurethane anawonekera mu 1930s.Pambuyo pazaka pafupifupi 80 za chitukuko chaukadaulo, izi zakhala zikugwiritsidwa ntchito kwambiri pantchito yopangira nyumba, zomangamanga, zofunikira zatsiku ndi tsiku, zoyendera, ndi zida zapanyumba.