Aramid refers to a family of synthetic plastics, generally prepared by the reaction between aromatic diamines and carboxylic acid halide groups. However, depending on chemical structure of reactants, two different types of aramid are resulted, as illustrated below. Between the two para-aramid is easier to form liquid crystalline structure and therefore stronger, stiffer, and stable up to higher temperature. But meta aramid is easier to synthesize and process, thus offering a great balance between performance and cost.