Cituoti:
Cuben Fiber is a laminated fabric constructed from Ultra High Molecular Weight Polyethylene (UHMWPE) fiber monofilaments and polyester, PVF etc. films. Cuben fiber is sometimes confused with carbon fiber, one of the many fibers used as a reinforcement in some Cuben Fiber laminates. Cubic Tech Corporation's ultra-high performance flexible laminates were re-branded from Cuben Fiber to CTF3 (TM) in 2009. Cubic Tech Corp produces CTF3 with a wide variety of fibers such as Vectran, Carbon, Kevlar etc. In August 2013 it was announced that Cubic Tech Corp has produced a version of their Waterproof Breathable fabric which utilizes the GE eVent Fabric.[3]
Cituoti:
Kevlar is synthesized in solution from the monomers 1,4-phenylene-diamine (para-phenylenediamine) and terephthaloyl chloride in a condensation reaction yielding hydrochloric acid as a byproduct. The result has liquid-crystalline behavior, and mechanical drawing orients the polymer chains in the fiber's direction. Hexamethylphosphoramide (HMPA) was the solvent initially used for the polymerization, but for safety reasons, DuPont replaced it by a solution of N-methyl-pyrrolidone and calcium chloride. As this process had been patented by Akzo (see above) in the production of Twaron, a patent war ensued.[9]