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Aramid fibers are high performance synthetic fibers with rigid polymer chains. The fibers were discovered at E. I. du Pont de Nemours and Company under the trade name Kevlar. aramid fibers are manufactured by condensation reaction of terephthaloyl chloride and paraphenylene diamine. Aromatic ring structures of aramid fibers lead to high thermal stability and rigid molecule structure lead to high tensile strength for aramid fibers. Para aramid fibers belong to the class of liquid crystalline polymers. Aramid fibers have high tensile strength, abrasion resistance, low flammability and have high resistant to organic solvents.