NOMEX® me KEVLAR® he polyamides kakara, aramid ranei i whakawhanakehia e DuPont.Ko te kupu aramid i ahu mai i te kupu aromatic me te amide (aromatic + amide), he polymer me te maha o nga here amide e tukurua ana i roto i te mekameka polymer.Na reira, ka wehewehea ki roto i te roopu polyamide.
He 85% o ona here amide e piri ana ki nga mowhiti kakara.E rua nga momo aramids matua, ka wehewehea hei meta-aramid, me te para-aramid a he rereke nga ahuatanga o ia roopu e rua e pa ana ki o raatau hanganga.