O le a le polyurethane?O a mea lelei ma le le lelei o mea polyurethane?

Talu mai le amataga o le gaosiga o pisinisi i le 1950s, o mea polyurethane (o lona uiga, polymers mole mole maualuga o loʻo i ai vaega carbamate i le filifili autu o macromolecules - NHCOO) ua vave ona atiaʻe.Pe a faʻatusatusa i mea faʻapipiʻi polymer, e iai ona lava uiga faʻapitoa.E mafai ona faʻaogaina numera eseese o vaega faʻatino ma ituaiga eseese o vaega faʻatino e tusa ai ma manaʻoga faʻatinoga eseese, ma faʻaogaina faiga eseese gaosiga e gaosia ai oloa polyurethane ma faʻatinoga eseese ma uiga.

E iai foʻi mea e le o iai i totonu o le paʻu paʻu, e pei o palasitika foamed, mea palasitika malosi, paʻu, alava faʻapipiʻi sili ona malosi, paʻu paʻu, faʻapipiʻi, ma isi.

O mea polyurethane o loʻo faʻaaogaina i le taimi nei i vaega eseese, mo se faʻataʻitaʻiga, i le aerospace alamanuia, o ana oloa faigata, mea vaivai ma oloa foam e mama nai lo mea uʻamea (taua tele mo vaalele), e masani ona faʻaaogaina i vaalele afi afi, taofi saoasaoa, antennas. Ufiufi, fa'atumu tane suau'u va'alele, fa'ato'a fa'aogaina o le suau'u, ma isi, fa'apea fo'i fa'avaa lagolago eseese ma aluga nofoa mo teuteuga i totonu, ma mo le fa'amama i totonu o pisinisi felauaiga.O nofoa nofoa, meaafale, ma e oʻo lava i paʻu e le mafai ona tuʻueseeseina mai oloa polyurethane, ma o le atinaʻe lata mai ma le faʻaogaina o oloa i mea faʻalavelave faʻafuaseʻi taʻavale ua mafua ai le tele.

E ui lava e tele ituaiga o oloa polyurethane, o lona faʻavasegaina o oloa e leai se mea e sili atu nai lo: mea faʻafefete faʻafefe, oloa faʻamalosi ma elastomers.

Afai o le oloa gaosi meafaigaluega ua fefiloi polyurethane pa'u, e masani lava mausali ma e mafai ona vulcanized i le sulfur, peroxide ma polyisocyanate, ma e mafai ona mamanuina e tusa ai ma le faagasologa o le gaosiga ma le fua o oloa pa'u masani.I le tulaga o elastomers thermoplastic, e mafai ona faʻagasolo e ala ile tui tui poʻo le faʻapipiʻiina.I le tulaga o polyurethane palasitika, e mafai ona gaosia e ala i le lipine lafo.

O le fa'aaogaina o oloa foam polyurethane fetu'utu'una'i e fai ma fa'ata'ita'iga, o le fa'agasologa o le gaosiga e masani lava o se lua-vaega fa'afefete fa'afefe vai.O lona uiga, o le tasi vaega o le faʻafefiloi muamua o le polyol polymer ma le isocyanate, ona faʻafefiloi ai lea o mea o loʻo i luga ma se isi vaega e aofia ai vai, foaming agent, stabilizer, catalyst ma sui fesoasoani eseese e gaosia ai le aminoformaldehyde Ester.I le taimi lava e tasi, e faʻaaogaina e faʻalavelave faʻapitoa e pei o vaega urea lenei tali e gaosia ai le carbon dioxide, faʻamatuʻuina atu le tele o le vevela, ona faʻaogaina lea o mea faʻamalosi e fetuunai ai le saoasaoa o le foam, ma iu ai ina faʻamaeʻaina se oloa foam toniga.

I le taimi nei, o loʻo faʻaleleia pea le gaosiga o taavale afi i tulaga o le saogalemu, mafanafana ma le tumau, ma o loʻo i ai le maualuga o manaʻoga mo le tumau i lalo o le tulaga maualuga o galuega o le faʻateʻia ma le faʻafefe o vaega elastomer.O se ituaiga fou o le te'i fa'ate'ia faia i le polyurethane foam vaivai ua fa'aalia i maketi i fafo, ma o ona mea fa'aletino ma fa'ainisinia ma a'afiaga fa'afefe e sili atu nai lo mea fa'apipi'i pa'u.