Ko te Polyurethane (PU), te ingoa katoa o te polyurethane, he momo puhui macromolecular.I hangaia e Otto Bayer i te tau 1937. Kua wehea te polyurethane ki te momo polyester me te momo polyether.Ka taea te hanga hei kirihou polyurethane (te nuinga o te kirihou pahuka), te muka polyurethane (e kiia ana ko te spandex i Haina), te rapa polyurethane me te elastomer.Ko te polyurethane ngawari te nuinga o te hanganga raina thermoplastic, he pai ake te pumau, te parenga matū, te kaha me nga taonga miihini atu i nga taonga pahuka PVC, a he iti ake te ahua o te pupuhi.He pai te whakamahana wera, te tangi oro, te awangawanga ohorere me te mahi anti-huaketo.Na reira, ka whakamahia hei takai, hei whakamahana oro me nga rauemi tātari.Ko te kirihou polyurethane pakari he maamaa te taumaha, he pai rawa atu ki te whakamaarama oro me te wera wera, te aukati matū, te pai o te mahi hiko, te ngawari ki te tukatuka, me te iti o te whakauru wai.Ko te nuinga o te waa e whakamahia ana i roto i te hanga, te motuka, te umanga rererangi me nga taonga hangahanga waiariki.Ko te mahi o te polyurethane elastomer kei waenga i te kirihou me te rapa, he aukati ki te hinu, te abrasion, te iti o te pāmahana, te koroheketanga, te pakeke me te elasticity.Kei te whakamahia te nuinga i roto i te ahumahi hu me te ahumahi hauora.Ka taea hoki te whakamahi i te polyurethane ki te hanga whakapiri, paninga, hiako waihanga, aha atu