Polyurethane (PU) yog cov khoom siv ntau yam polymer nrog ntau lub cev tsim nyog, suav nrog cov tawv tawv thiab mos elastomers, txheej txheej nyias nyias, cov txheej txheem sib txuas, thiab cov tawv tawv thiab muag muag. Polyurethane yog tsim los ntawm condensation cov tshuaj tiv thaiv ntawm isocyanates thiab polyols, thiab cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom ntawm polyurethane tuaj yeem sib txawv thiab ua tau zoo heev los ntawm kev cuam tshuam nrog ntau yam qauv thiab hom isocyanates thiab polyols. Kev siv ntau yam hauv cov qauv tshuaj thiab lub cev muaj zog ua rau PU muaj txiaj ntsig zoo hauv kev tsim cov khoom lag luam, nrog rau cov khoom siv textile, cov nplaum ntoo, cov khoom siv sealants, elastomeric cushions, khau khau, forklift log tsheb, rollers, rwb thaiv tsev foams, thiab lwm yam.
PU tuaj yeem muab faib ua ob hom: thermoset PU thiab thermoplastic PU.
Cov khoom siv CPU yog dab tsi?
Cov khoom siv CPU, tseem hu ua Casting PU Resin, suav nrog cov kua thermoset PU resin tab tom hla kev sib txuas tshuaj tiv thaiv thiab cua sov kom khov thiab zoo. Cov chemistry no ua rau muaj cov qauv molecular mesh uas muaj cov khoom zoo ntawm lub cev tab sis tsis tuaj yeem siv tau yooj yim los yog thim rov qab-tsim tom qab tsim. Casting PU resin feem ntau hu ua CPU hauv kev lag luam thiab yog siv los tsim cov khoom siv hluav taws xob zoo xws li cov menyuam, qhov chaw, squeegees, thiab cov log tsheb. Cov kua PU resin yog tov thiab muab pov rau hauv pwm thiab tso cai rau kho, ua rau qhov xav tau.