What are the Advantages of Aramid Fiber Laminates over Carbon Fiber Composites?

Aramid Fiber Laminate (AFL) is a high-performance composite material fabricated by laminating aramid fibers (e.g., Kevlar, Twaron) with thermosetting resins (commonly epoxy or phenolic, or thermoplastic resins) through high-temperature, high-pressure curing. Some aramid layers are bonded to metal substrates (e.g., aluminum), such as ARALL. AFLs exhibit exceptional properties including high strength, lightweight construction, impact resistance, tear resistance, fatigue resistance, high-temperature tolerance, and good electrical insulation.

Pure aramid fiber laminates can be used in bulletproof plate, helmet, aerospace structural parts, high pressure vessel lining and sports equipment.

ARALL (Aramid Reinforced Metal Laminate) is utilized in aircraft skin and fuselage components, featuring fatigue resistance and lightweight properties.

Aramid paper laminates are used for electrical insulation (insulating components of transformers and motors).

What are the advantages of aramid fiber laminates over carbon fiber materials?

1. Carbon fibers are hard but brittle, prone to cracking, fragmentation, and delamination under heavy impact. Aramid fibers exhibit exceptional toughness, capable of absorbing impact energy without breaking, cracking, or chipping.

2. The density of aramid is approximately 1.44 g/cm³, while that of carbon fiber ranges from 1.7 to 1.8 g/cm³. Under the same strength conditions, aramid is lighter.

3. Carbon fiber is prone to micro-cracks under repeated stress, while aramid exhibits superior fatigue resistance, bending resistance, and vibration resistance compared to carbon fiber.

4. Carbon fibers oxidize and ablate at high temperatures. Aramid fibers are non-flammable, non-melting, self-extinguishing, and exhibit superior thermal stability.

5. Carbon fiber is hard and brittle, which can damage cutting tools during processing; aramid has good toughness, does not chafe the edge, and does not cause hand injuries, making the processing safer.

6. Carbon fiber is conductive, making it unsuitable for many insulation applications; aramid, an excellent electrical insulating material, can be directly used as high-voltage insulating components.

RDS Composites provides aramid fiber and carbon fiber products for applications in the aerospace, defense, automotive, and insulation industries. Please feel free to contact us if you are interested in these products.