Precursor
 
HexTow™ fibers from Hexcel are produced in a continuous operation in which the polyacrylonitrile precursor undergoes a series of precisely controlled processes. Exposure to extremely high temperatures chemically changes the precursor, yielding high strength-to-weight and high stiffness-to-weight properties through oxidation, carbonization and graphitization. The successive surface treatment and sizing stages improve bonding and handleability. The resulting carbon fiber is stronger than steel, lighter than aluminum and as stiff as titanium. It can be supplied in two basic forms: Continuous Fiber and Chopped Fiber.

Continuous Fiber
Continuous fiber can be combined with virtually all thermoset and thermoplastic resin systems. They are used for weaving, braiding, filament winding applications, uni-directional prepreg tapes and prepreg tow for fiber placement.

Continuous Fiber Data Sheets 

Chopped Fiber
Chopped fibers are used in compression and injection molding compounds to produce machine parts, gears, chemical valves and computer housings. The finished products have excellent corrosion, creep and fatigue resistance plus high strength and stiffness characteristics.

Chopped Fiber Data Sheets