US Patent thiab Trademark Office tsis ntev los no tau tso cai rau ib lub tuam txhab patent rau cov txheej txheem thermochemical hloov dua siab tshiab, khij lub kauj ruam tseem ceeb hauv kev hloov cov ntaub ntawv pov tseg polyurethane ua npuas ncauj rau siab - cov khoom siv rov ua dua tshiab. Cov npuas dej rov qab tuaj yeem hloov mus rau hauv cov khoom lag luam uas xav tau kev lag luam zoo, xws li cov khoom siv tawv hluavtaws, cov khau khau, cov xov tooj ntawm tes, cov ntaub qhwv, cov khoom siv roj hmab, thiab lwm yam khoom siv niaj hnub.
Tsis zoo li cov txheej txheem tshuaj siv tshuaj ib txwm siv, cov txheej txheem no yog tsim los rau kev siv hluav taws xob thiab yuav tsum tsis muaj cov kuab tshuaj ntxiv lossis cov khoom siv catalysts. Tom qab kev kho mob, qhov ntim ntawm polyurethane ua npuas ncauj yog txo los ntawm kwv yees li 90%, uas ua rau cov roj hmab -zoo li cov ntawv; Cov no yog tom qab hauv av thiab sib xyaw nrog cov khoom siv ntxiv los tsim cov pellets rov qab tsim nyog rau kev txhaj tshuaj molding.
Cov thev naus laus zis tseem ceeb no siv cov ntaub ntawv pov tseg polyurethane ua npuas ncauj los tsim cov tshuaj txhaj tshuaj -moulding pellets rau roj hmab- zoo li cov ntawv thov, suav nrog cov khoom yas mos, khau, xov tooj ntawm tes, gaskets, thiab cov khoom siv tsheb. Tib txheej txheem kuj tseem tuaj yeem siv los tsim cov tawv hluavtaws rau cov hnab nyiaj, hnab tes, rooj tog zaum, khoom siv, khoom siv, khoom siv tes ua, thiab lwm yam kev tsim qauv tsim. Raws li cov ntaub ntawv no tau muab los ntawm cov khoom siv rov ua dua polyurethane ua npuas ncauj, lawv kuj pab cov tuam txhab txo cov kev pheej hmoo cuam tshuam nrog cov nqi roj hmab, roj nqi volatility, tariffs, thiab cov khoom lag luam cuam tshuam.
