Aramid fibers are a class of heat-resistant and strong synthetic fibers. They are used in aerospace and military applications, for ballistic rated body armor fabric and ballistic composites, in bicycle tires, and as an asbestos substitute. They are fibers in which the chain molecules are highly oriented along the fiber axis, so the strength of the chemical bond can be exploited.
Two types of Aramid materials are used in. Meta Aramid paper which is used for making honeycomb core materials required for sandwich construction. Para-aramids seem to be in highest demand because of their tensile strength and tenacity.
General Specs of Aramid
- Good resistance to abrasion.
- Good resistance to organic solvents.
- No melting point, degradation starts from 500°C.
- Low flammability.
- Good fabric integrity at elevated temperatures.
- Sensitive to acids and salts.
- Sensitive to ultraviolet radiation.
Specs of Para-Aramid
- Para-aramid fibers provide outstanding strength-to-weight properties
- High tenacity
- Low creep
- Low elongation at break (~3.5%)
- Difficult to dye – usually solution dyed
- Good impact strength
- Low density lighter than glass
- Good wear resistance