Polyurethane (PU) tau pib tsim los ntawm cov kws tshawb fawb German thaum xyoo 1930. Cov kws tshawb fawb German polycondensed kua isocyanate thiab kua polyether lossis glycol polyester los tsim hom khoom tshiab. Lub cev ua tau zoo txwv ntawm cov khoom no yog ua tau zoo nrog cov hauv lub sijhawm. Cov ntaub ntawv Polyolefin tsis zoo li qub, cov kws tshawb fawb muab nws lub npe polyurethane. Nrog rau qhov kawg ntawm Kev Tsov Rog Thoob Ntiaj Teb thib Ob, Asmeskas kev lag luam tshuaj lom neeg kev lag luam tau vam meej, thiab cov khoom lag luam polyurethane ua npuas ncauj yoog tau muab coj los ua ke xyoo 1950. Qhov no yog lub sijhawm tseem ceeb hauv kev lag luam chemical tam sim ntawd thiab muab lub hauv paus ruaj khov rau kev txhim kho yav tom ntej ntawm kev lag luam polyurethane. Kev kawm txuj.
Polyurethane ua npuas dej tau muab faib ua ob hom: ua npuas dej khov thiab ua npuas muag muag. Nws muaj qhov zoo tshaj plaws elasticity, elongation, compressive zog thiab yooj, zoo li zoo tshuaj lom neeg ruaj khov. Ntxiv rau, cov ntawv ua npuas polyurethane tseem muaj cov txheej txheem zoo heev, kev ua kom zoo, kev rwb thaiv tsev kub thiab lwm yam khoom, thiab yog cov khoom siv cushioning nrog kev ua haujlwm zoo.
Kev tsim cov khoom siv polyurethane tau ri thoob plaws North America. Nws tau tshaj tawm hais tias tag nrho cov nyiaj xyoo nruab nrab ntawm txoj kev loj hlob ntawm North American polyurethane ua npuas ua lag luam yuav tsum txog 6%. Nws kwv yees tias los ntawm 2020, thaj chaw loj hlob yog tseem nyob hauv thaj chaw thiab thaj chaw tsuag tshuaj tsuag polyurethane ua npuas ncauj daim ntawv thov kev lag luam, ntxiv rau kev siv tub rog. Ntxiv rau, polyurethane tseem yuav siv hauv kev lag luam kho mob los kho cov qhov txhab ua haujlwm kom sai thiab siv tau zoo.
