Polyurethane ndi chiyani?

Polyurethane (PU), dzina lonse la polyurethane, ndi polima pawiri.Linapangidwa ndi Otto Bayer mu 1937. Polyurethane imagawidwa m'magulu awiri: mtundu wa polyester ndi polyether.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 kwamankhwala, 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.Makhalidwe a polyurethane elastomers ali pakati pa pulasitiki ndi mphira, kukana mafuta, kukana kuvala, kukana kutentha kwapansi, kukana kukalamba, kuuma kwakukulu ndi kusungunuka.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.

Chidziwitso:Zina mwazochokera pa intaneti, ndipo gwero ladziwika.Amangogwiritsidwa ntchito kufotokoza mfundo kapena malingaliro omwe afotokozedwa m'nkhaniyi.Amangolankhulana ndi kuphunzira, ndipo sizinthu zina zamalonda.Ngati pali kuphwanya kulikonse, chonde titumizireni kuti tichotse nthawi yomweyo.


Nthawi yotumiza: Oct-27-2022