Design Benefits of Aramid Fibre Fabrics

Excellent Tensile Strength: 3620 MPa (525 ksi)
Good Stiffness: 131 GPa (19 msi)
Excellent Toughness, with a high resistance to being cut or penetrated by a sharp impact load.
Low Density: 1.44 gm/cm3, the lowest of all major reinforcing fibers, so ideal for infusing a single skinned very low weight – high strength laminate.
Negative Coefficient of linear expansion: -4.3 x 106 (-2.4 x 106), so for high temperature applications can provide very stable mountings for electrical components.
Low Dielectric Constant: 4 at 1 MHz offering good radar transparency

Potential Problems To Avoid

Aramid fibers are difficult to cut and grind so only use aramid rated cutting and grinding tools.
Aramid fibers are lower in compression than glass or carbon, hence many designers overcome by selecting a suitable Aramid fibre based hybrid fabric.
Aramid fibers pick up moisture very easily, so must be kept dry and need to be fully resin impregnated when moulded.
Aramid fibers are degraded by UV light, so must be over coated with a resin layer, gelcoat or paint