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Aramid fibers include Kevlar® and are used in many safety applications: protective clothing, ropes, and webbing.

kevlar_weaveAramid is a manufactured fiber in which the fiber-forming material is a long chain synthetic polyamide having at least 85% of its amide linkages (-NH-CO-) attached directly to two aromatic rings. Aramid fibers have low flammability, high strength and high modulus. Most aramid yarns are affected by UV light which alters the natural color and degrades fiber strength upon prolonged exposure.

Aramid fibers have found use in protective clothing, ropes and webbing used in safety applications and used as protection from ballistics and projectiles.

Nomex® and Kevlar® are two popular aramid fibers produced by the DuPont® Company. Other aramid fibers include Tarwon®, Technora®, and Conex® brand fibers.

Aramid fiber properties include:
  • High tenacity
  • Abrasion resistant
  • Flame and heat resistant
  • Controlled elongation
  • Chemical resistant (in specific environments)
  • Dimensional stability and strength
  • Reduced weight and size
  • Flexibility
Sample Aramid applications:
  • Shoulder straps
  • Harness webbing
  • Chin straps
  • Helmet suspension
  • Binding tapes
  • Lap belts

Technical Data

Tenacity (g/denier) 23.0 - 23.6
Elongation at break (%) 2.4 - 3.6
Shrinkage at 177°C (%) < 0.1
Melting point (°F) Does not melt, decomposes at 800°F - 900°F
In flame Excellent flame resistance
After flame Self-extinguishes
Chemical resistance Good chemical resistance
Specific gravity (g/cc) 1.44
Moisture regain (%) 3.5 - 7.0
Disclaimer: Values are only a guide. Actual values depend on manufacturer and exact type of yarn. Please contact our engineering team for specific values as they relate to your application.

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Inside, we highlight topics such as:

  • Common Specifications: (Mil-Spec, PIA, & UL)
  • Fabrication Methods: (Braiding, Jacquard Loom, Shuttle Loom, etc.)
  • Weave Types: (Basket, Plain, Satin, Twill)

Additional Resources