Carbon fiber and Kelvar® are popular reinforcement options. Kelvar® is DuPont’s brand name for aramid. Both are light weight and have great strength.
Carbon fiber is known for its strength, being light weight and for its good looks. It is used in the automobile, sporting goods and aerospace industry. It is made up of millions of bundled filaments. A downside to carbon is that it can be brittle.
Kelvar® is known for its’ impact, heat and abrasion resistance. Be aware that it can be difficult to cut. It is often used in bullet proof vests, kayaks, canoes and motorcycle racing clothes.
Carbon fiber fabric and Kelvar® are both compatible with epoxy, polyester and vinyl ester resin. It is recommended to use epoxy or vinylester resin though as they are a higher quality resin.