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Nhoroondo yePolyurethane (PU) zvinhu uye zvigadzirwa
Yakavambwa naVaWurtz naVaHofmann muna 1849, ichikura muna 1957, Polyurethane yakava chinhu chakashandiswa mumaindasitiri mazhinji akasiyana.Kubva pakubhururuka muchadenga kuenda kuindasitiri nekurima.Nekuda kwekunaka kweakapfava, ane ruvara, yakakwira elasticity, hydrolyze resistant, kutonhora uye kupisa res ...Verenga zvimwe
