Aramid fibres

Aramid fibres are synthetic fibres used as reinforcement materials, as high-performance engineering tools and in safety clothing (bullet and shrapnel resistant vests and fire-resistant clothing). The main advantages of aramid fibres are very high tensile strength, low density, no thermal expansion, good shock absorption and resistance to impact and good chemical stability. The main disadvantages of aramid fibres are that they are difficult to process and show weak resistance to compressive forces. Thus, preparation and processing of the fibres is greatly complicated by their extremely high melting point and low solubility. Spinning is therefore not done from a melt but from a solution in concentrated sulphuric acid. Subsequently, the fibres are slightly stretched to further increase their mechanical properties. For more info, see: