NOMEX® na KEVLAR® bụ polyamides aromatic ma ọ bụ aramids nke DuPont mepụtara. Okwu ahụ bụ aramid sitere na okwu aromatic na amide (aromatic + amide), nke bụ polima nwere ọtụtụ njikọ amide na-emegharị n'ime yinye polima. Ya mere, a na-ekewa ya n'ime otu polyamide.
O nwere opekata mpe pasentị iri asatọ na ise nke njikọ amide ya na mgbanaka aromatic. E nwere ụdị aramid abụọ bụ isi, nke a na-akpọ meta-aramid, na para-aramid, otu abụọ a nwere ihe dị iche iche metụtara nhazi ha.