Aramid is a material formed by combining para-phenylenediamine and terephthaloyl chloride. This produces aromatic polyamide threads which are further refined to produce fibres. These fibres are woven into a very light, very strong cloth. When this cloth is combined with resin it produces a composite material which is 20 times stronger than steel with excellent torque and tensile strength, and excellent impact-resistant properties too.
Kevlar® is the well-known brand of aramid produced by the DuPont company, and is widely used in the aerospace and defence industries.