Oloa

Polyurethane (PU), igoa atoa o le polyurethane, o se ituaiga macromolecular compound.Na faia e Otto Bayer i le 1937. Ua vaevaeina le polyurethane i le ituaiga polyester ma le polyether type.E mafai ona faia i latou i polyurethane palasitika (tele lava foam palasitika), polyurethane fiber (taʻua spandex i Saina), polyurethane paʻu ma elastomer.Polyurethane vaivai e masani lava o se fausaga laina thermoplastic, lea e sili atu le mautu, vailaʻau tetee, maufetuunaʻi ma mea faʻainisinia nai lo mea PVC foam, ma e itiiti ifo le faʻalavelave faʻalavelave.Fa'amama lelei le vevela, fa'amalo leo, fa'ate'ia fa'ate'ia ma fa'atinoga fa'ama'i.O le mea lea, e faʻaaogaina e pei o le afifiina, faʻamalama leo ma mea faʻamamaina.O le palasitika polyurethane malosi e mama i le mamafa, sili ona lelei i le faʻaogaina o le leo ma le vevela, faʻamaʻi faʻamaʻi, lelei i le eletise, faigofie ona faʻagasolo, ma maualalo le faʻaogaina o le vai.E masani ona faʻaaogaina i le fausiaina, taʻavale, vaalele vaalele ma mea faʻapipiʻi faʻamaʻaina vevela.O le faʻatinoga o le polyurethane elastomer o loʻo i le va o palasitika ma le paʻu, lea e faʻasaʻo i le suauʻu, abrasion, maualalo le vevela, matua, maualuga maa ma elasticity.E masani ona faʻaaogaina i falevae seevae ma falemaʻi faafomaʻi.Polyurethane e mafai foi ona faʻaaogaina e fai ai mea faʻapipiʻi, paʻu, paʻu synthetic, ma isi