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Aramid fibers are a class of heat-resistant and strong synthetic fibers. They are used in aerospace and military applications, for ballistic rated body armor fabric and ballistic composites, in bicycle tires, and as an asbestos substitute. The name is a portmanteau of "aromatic polyamide". They are fibers in which the chain molecules are highly oriented along the fiber axis, so the strength of the chemical bond can be exploited. World capacity of para-aramid production is estimated at about 41,000 tonnes/year in 2002 and increases each year by 5–10%. In 2007 this means a total production capacity of around 55,000 tonnes/year. Aramids are generally prepared by the reaction between an amine group and a carboxylic acid halide group. The most well-known aramids (Kevlar, Twaron, Nomex, New Star and Teijinconex) are AABB polymers. Nomex, Teijinconex and New Star contain predominantly the meta-linkage and are poly-metaphenylene isophtalamides (MPIA). Kevlar and Twaron are both p-phenylene terephtalamides (PPTA), the simplest form of the AABB para-polyaramide. After production of the polymer, the aramid fiber is produced by spinning the solved polymer to a solid fiber from a liquid chemical blend. Polymer solvent for spinning PPTA is generally 100% anhydrous sulfuric acid (H2SO4). Kevlar rope is often substituted for steel cable where its chemical resistance to rusting and lower weight is a real advantage. Because it degrades in the Sun it is often encased in other protective material. In Ropes a casing of Polyester is often used. Because Aramid does not resist live loading well, and can fail without warning if it has previously been damaged, its use is restricted for boat lines. In climbing ropes, it was found that kevlar could be seriously compromised after stopping a fall. Knotting Kevlar can reduce strength by 50% or more so kevlar cables are often terminated with custom fittings to reduce strength loss. Kevlar ropes are not recommended for use over pulleys or flexing applications. It should not be subject to shock loads. Kevlar has been used in a suspension bridge in Scotland and as guy wires for hydro towers.	General Aramid Aramids Materials used for ropes Aramid introduction Shooting on Aramid Teijin Aramid MSDS Kevlar Tyfo SCH-41S Coated fabric Kevlar para aramid fibre Nomex meta-aramid Kevlar Aramid pulp Kolon Heracron brand pulp Aramide Inhance KF fibers Products K-tech para aramid jean Aramid helmet Aramid fabric Aramid fiber fabrics Dupoint Kevlar fiber Aramid (Kevlar) material - GGA Aramid product list Trellex Aramid conveyor belts Kevlar technical guide Aramid fiber honeycomb Aramid muletape Aramid (Kevlar) T-shirt Manufacturing process Synthetic and cellulose fiber formation technology Spinning process Manufacturing process of Aramid Patent Aramid composition Aramid fibrils Molded aramid sheets Aramid fiber filtration sheet Dispersible aramid pulp Aramid papers containing aramid paper pulp Hydrolysis-resistant aramids Electroless plated aramid surfaces Oriented, shaped articles of pulpable para-aramid /meta-aramid blends High performance aramid matrix composites Para-aramid pulp including meta-aramid fibrids and processes of making same Aramid dispersions and aramid sheets of increased uniformity Order the CD ROM Today	Suppliers Suppliers of Aramid Manufacturers of Aramid Selling leads of Aramid Aramid Suppliers Exporters of Aramid Aramid supplier from Greece Supplier from Maharashtra Company profiles Company from Austria Company1 from China Company2 from China Company from Greece Company from Italy Company from Korea Company from Taiwan Company1 from U.S.A Company2 from U.S.A Company3 from U.S.A Consultancy Consultancy from Delaware Consultancy from Netherland Consultancy from New York Online Consultancy 1 Online Consultancy 2 Online Consultancy 3 Market Operations and strategies of Teijin's Aramid fibers business group Assessment of China's market for fiber reinforced construction materials Aramid business division Dupoint wins $900m Kevlar spy case Report Transverse moisture sensitivity of aramid/epoxy composites Aramid fiber mesh as reinforcement of concrete panels subjected to high strain rates Moisture sorption and diffusion in Kevlar 49 aramid fiber Low smoke Zero halogen cable Carcinogenicity of Kevlar aramid pulp following intraperitoneal injection into rats Aromatics polyamides Study Non-woven aramid reinforcements controlled thermal expansion prepreg and laminate for printed wiring boards Evaluations of an aramid fiber in Nonwoven processes for honeycomb applications Engineering with aramid fibers Easy rigging Antimicrobial polymeric materials, cellulose and m-aramid composite fibers
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