Aramid fibers area unit a category of extraordinarily resilient and heat-resistant artificial fibers. The fiber-forming substance may be a long-chain artificial organic compound | polymer} during which a minimum of eighty-fifth of the amide linkages area unit connected on to 2 aromatic rings. The fiber is made by spinning a solid fiber from a liquid chemical mix.
Aramid fibers area unit rather big-ticket and troublesome to manufacture, however not like high relative molecular mass polyolefin fibers, aramids have a polar aromatic compound backbone, which ends in a very a lot of higher glass transition temperature and no freezing point. because of the aromatic structure, aramid fibers have wonderful heat resistance, terribly low flammability, and smart chemical resistance to most organic solvents, however area unit sensitive to salt (chlorine), and to some acids and bases, in addition on degradation from ultraviolet.
This includes a high strength-to-weight magnitude relation, even higher than carbon, wonderful dimensional stability because of the high elastic modulus (stiffness & low elongation at break), and outstanding abrasion resistance and pertinacity (difficult to chop or fray).