Dzina lazogulitsa:Polyirethane

Zosankha Zogulitsa:

Mankhwala:

Polyirethane (PU), dzina lathunthu la polyirethane, ndi polymer. 1937 ndi Otto bayer ndi zina mwa izi. Pali mitundu iwiri yayikulu ya polyirethane, mtundu wa polyester ndi mtundu wa polyther. Amatha kupangidwa m'makalasi a polyurethane (makamaka chithovu), ulusi wa polyirethane (wotchedwa Spandex ku China), poureurethane rabaji ndi elastromers.
Polyirethane polyirethane makamaka mawonekedwe a thermoplaty, omwe ali ndi bata bwino, kukana kwa mankhwala, kulimba ndi kumakina kuposa kusintha kwa PVC, ndi kusiyanasiyana kosiyanasiyana. Ili ndi kuteteza kwamimba, kutulutsa komveka, kukana kudandaula, ndi anti-toicatic. Chifukwa chake, imagwiritsidwa ntchito ngati mabungwe, makulidwe omveka ndi kusema zinthu. Chiptiki chokhazikika cha polyurethane ndi chopepuka, chimamveka chipilala champhamvu, chotupa chamagetsi, kukana mankhwala, magetsi osavuta, ndi mayamwidwe amadzi. Amagwiritsidwa ntchito makamaka ngati zinthu zomangamanga, magalimoto, mpweya wabwino, kutentha kuyikapo komanso kukumbutsa. Polyurethane elastomer magwiridwe pakati pa pulasitiki ndi mphira, kukana mafuta, kuvala kutentha pang'ono, kukana kwamphamvu, kuuma kwakukulu. Amagwiritsidwa ntchito makamaka pamakampani opanga mabizinesi ndi makampani azachipatala. Polyurethane amathanso kutsatsa, zofukizira, zikopa zopangidwa, etc.

Ntchito:

Ma polsurethanes ndi amodzi mwa zinthu zovomerezeka kwambiri padziko lapansi masiku ano. Amagwiritsa ntchito zawo zambiri kuchokera ku chithovu chosasinthika mu mipando yokhazikika, madenga okhwima m'makoma a thermoplactoc polyirethane amagwiritsidwa ntchito poyendetsa pansi. Ma Polyirethanes agwiritsidwa ntchito zaka makumi atatu zapitazi pamabungwe osiyanasiyana chifukwa cha chitonthozo chawo, amasunga ndalama, kusungitsa mphamvu kwa chilengedwe komanso kumveka kwachilengedwe komanso kumveka kwachilengedwe. Kodi ndi ziti mwazinthu zomwe zimapangitsa polyirethasthanes zofunika kwambiri? Kukhazikika kwa polyirethane kumathandizira kwambiri kwa nthawi yayitali ya zinthu zambiri. Kuphatikiza kwa ntchito yopanga zinthu moyo wazomera ndi kuchuluka kwa zinthu zofunika kumaganizo mwachilengedwe omwe nthawi zambiri amakomera kusankha kwa polsurethanes [19-21]. Polyirethanes (mafinya) amayimira kalasi yofunika ya thermoplastic ndi thermonkhot ma polima monga makina awo, zamafuta, ndi mankhwala amatha kukhala ogwirizana ndi zomwe ma polyols osiyanasiyana.