Foam yePolyurethane (PU foam) chinhu chakakosha mumaindasitiri mazhinji, kusanganisira kuvaka, kugadzira mota, kurongedza, uye kuputira. Maitiro ekuumbwa kwefoam yePU anosanganisira kuita kwemapolyol ane isocyanates, uye macatalysts anodzora kumhanya kwekuita, maitiro ekufuridza furo, uye ...
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