Para-aramid fibers such as Kevlar and Twaron, which are slightly different, have outstanding strength-to-weight properties, and have high tenacity which makes it difficult to cut or fray.
High Rigidity Young's modulus (stiffness): 130-179 GPa compared to carbon Fiber 300 GPa and glass 81 GPa, low elongation to Break (does not stretch much).
Resistant to organic solvents, but sensitive to Chlorine, Some Acids and Bases.
Good resistance to abrasion and cutting
Tensile Strength is Slightly less than E glass fiber
No melting point. Resistant to thermal degradation. Low flammability
Good fabric integrity at elevated temperatures
Nonconductive under regular conditions, but can absorb water and salt water.
Sensitive to degradation from ultraviolet radiation
Sensitive to shock load. Can fail unexpectedly if subject to shock.
Relatively low compression strength compared to Carbon fiber.