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Keeb kwm ntawm Polyurethane (PU) cov khoom thiab cov khoom
Tsim los ntawm Mr. Wurtz & Mr. Hofmann nyob rau hauv 1849, tsim nyob rau hauv 1957, Polyurethane los ua ib yam khoom siv nyob rau hauv ntau yam kev lag luam.Los ntawm spaceflight mus rau kev lag luam thiab kev ua liaj ua teb.Vim qhov zoo ntawm cov mos mos, muaj xim, siab elasticity, hydrolyze resistant, txias thiab kub res...Nyeem ntxiv
