NOMEX® thiab KEVLAR® yog cov tshuaj tsw qab polyamides lossis aramids tsim los ntawm DuPont.Lub sij hawm aramid muab los ntawm lo lus aromatic thiab amide (aromatic + amide), uas yog ib tug polymer nrog ntau amide bonds rov qab nyob rau hauv lub polymer saw.Yog li ntawd, nws yog categorized nyob rau hauv pawg polyamide.
Nws muaj tsawg kawg yog 85% ntawm nws cov ntawv cog lus amide txuas nrog cov nplhaib uas muaj ntxhiab.Muaj ob lub ntsiab ntawm aramids, categorized li meta-aramid, thiab para-aramid thiab txhua ntawm ob pawg no muaj cov khoom sib txawv ntsig txog lawv cov qauv.