Aramid Fibre ( Kevlar / Twaron ) – Properties and Applications

Introduction to Aramid Fibre
Key Properties and Benefits of Aramid Fibre
Key Applications of Aramid Fibre

Introduction to Aramid Fibre

Aramid fibre is an aromatic polyamide, better known by tradenames such as Kevler (DuPont) and Twaron (Teijin Twaron). Many different grades are available, with properties to suit various applications, especially the aerospace and military industries. The inherent bond strength of the molecules is exploited within aramid fibres, due to the prevalent orientation of molecules along the fiber axis.

Aramid is a synthetic fibre that is produced by spinning a solid fibre from solution. The initial preparation of the polymer is generally achieved by a chemical reaction between amine group and a carboxylic acid halide group. Once the polymer has been produced, the aramid fibre is then created by spinning.

Key Properties and Benefits of Aramid Fibre

Aramid has a number of beneficial mechanical properties that make it such an important material in many different fields. Some of these are outlined in the list below:

  • Low density
  • High strength
  • Good impact resistance
  • Good abrasion resistance
  • Good chemical resistance
  • Good resistance to thermal degradation
  • Compressive strength similar to E-glass fibres
  • Some grades of aramid fibre can degrade when exposed to ultraviolet light

Key Applications of Aramid Fibre

Some applications for aramid fibres are listed below. It is usually used as fibre reinforcement for polymer matrix composites.

  • Ballistic protective applications such as bullet proof vests
  • Protective apparel such as gloves, motorcycle protective clothing and hunting gaitors, chaps and pants.
  • Sails for sailboats, yachts etc
  • Belts and hosing for industrial and automotive applications
  • Aircraft body parts
  • Boat hulls
  • Fibre optic and electromechanical cables
  • Friction linings such as clutch plates and brake pads
  • Gaskets for high temperature and pressure applications
  • Adhesives and sealants


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