Aramid (Kevlar, Technora)

Trademarks: Kevlar® (DuPont), Twaron® (Akzo/Acordis), Technora® (Teijin Aramid).

Aramid, or aromatic polyamide fibres such as Technora, Twaron, and Kevlar offer high strength, good resistance to cut and creep, and extreme heat resistance. However aramid is sensitive to repetitive bending (flex fatigue) and has pure UV and abrasion resistance. That is why aramid fibres are generally given a polyamide or polyester sheath to protect them. Like UHMWPE aramid shows almost no stretch and no dynamic energy absorption. It is mainly used in places where minimal stretch and high temperature resistance is essential. For example within fire-fighter bailout kits, on winches or in hot air balloon ropes, or for any other application where heat exposure needs to be considered.

Within the aramid family there are also Meta-Aramids (poly-(meta-phenylene isophthalamide)) such as Nomex and Tejinconex, these are meta linked aramids and have excellent resistance to flames and heat but are not as strong as para linked aramids.

Marlowropes.com – Material properties
Ropelab.com.au – Physics
Researchgate.net – Aramid_fibers