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Mbiri ya Polyurethane(PU) zakuthupi ndi zinthu
Yakhazikitsidwa ndi Bambo Wurtz & Bambo Hofmann mu 1849, yomwe ikukula mu 1957, Polyurethane inakhala zinthu zomwe zimagwiritsidwa ntchito m'mafakitale osiyanasiyana.Kuchokera kumlengalenga kupita ku mafakitale ndi ulimi.Chifukwa cha kutsogola kwa zofewa, zowoneka bwino, zosalala kwambiri, zosagwirizana ndi hydrolyze, ozizira komanso otentha ...Werengani zambiri
