Aramid Fiber:
Aramid ia a manufactured fiber in which the fiberforming substance is a long-chain synthetic polyamide in which at least 85% of the amide (-CO-NH-) linkages are attached directly between two aromatic rings.
Technically, aramid fibers are long-chain synthetic polyamides. Aramid fibers have extremely high tensile strength, which is why they are commonly used in armor and ballistic protection applications. With a distinctive yellow color, aramid fibers are frequently used in advanced composite products which require high-strength and light-weight properties.
Also Known As: Kevlar (Trademark of DuPont), Twaron (Trademark of Teijin)
History of Aramid Fiber | Aramid Fiber History
Aromatic polyamides were first introduced in commercial applications in the early 1960s, with a meta-aramid fiber produced by DuPont under the tradename Nomex. Aramid fiber, which handles similarly to normal textile apparel fibers, is characterized by its excellent resistance to heat, as it neither melts nor ignites in normal levels of oxygen. Aramid is used extensively in the production of protective apparel, air filtration, thermal and electrical insulation as well as a substitute for asbestos. Meta-aramid is also produced in the Netherlands and Japan by Teijin under the tradename Teijinconex, in China by Yantai under the tradename New Star and a variant of meta-aramid in France by Kermel under the tradename Kermel.
Manufacturing Process of Aramid
World capacity of para-aramid production is estimated at about 41,000 tons/yr in 2002 and increases each year by 5-10%. In 2007 this means a total production capacity of around 55,000 tons/yr.
Spinning:
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% (water free) sulfuric acid (H2SO4).
Appearances of Aramid Fiber
Technically, aramid fibers are long-chain synthetic polyamides. Aramid fibers have extremely high tensile strength, which is why they are commonly used in armor and ballistic protection applications. With a distinctive yellow color, aramid fibers are frequently used in advanced composite products which require high-strength and light-weight properties.
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| Structure of Aramid |
History of Aramid Fiber | Aramid Fiber History
Aromatic polyamides were first introduced in commercial applications in the early 1960s, with a meta-aramid fiber produced by DuPont under the tradename Nomex. Aramid fiber, which handles similarly to normal textile apparel fibers, is characterized by its excellent resistance to heat, as it neither melts nor ignites in normal levels of oxygen. Aramid is used extensively in the production of protective apparel, air filtration, thermal and electrical insulation as well as a substitute for asbestos. Meta-aramid is also produced in the Netherlands and Japan by Teijin under the tradename Teijinconex, in China by Yantai under the tradename New Star and a variant of meta-aramid in France by Kermel under the tradename Kermel.
Manufacturing Process of Aramid
World capacity of para-aramid production is estimated at about 41,000 tons/yr in 2002 and increases each year by 5-10%. In 2007 this means a total production capacity of around 55,000 tons/yr.
Spinning:
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% (water free) sulfuric acid (H2SO4).
Appearances of Aramid Fiber
- Fiber
- Chopped fiber
- Powder
- Pulp
- Good resistance to abrasion
- Good resistance to organic solvents
- Nonconductive
- No melting point, degradation starts from 500°C
- Low flammability
- Good fabric integrity at elevated
- Sensitive to acids and salts
- Sensitive to ultraviolet radiation
- Prone to static build-up unless finished
- Flame-resistant clothing
- Heat protective clothing and helmets
- Body armor[competing with PE based fiber products such as Dyneema and Spectra
- Composite materials
- Asbestos replacement (e.g. braking pads)
- Hot air filtration fabrics
- Tires, newly as Sulfron (sulfur modified Twaron)
- Mechanical rubber goods reinforcement
- Ropes and cables
- Wicks for fire dancing
- Optical fiber cable systems
- Sail cloth (not necessarily racing boat sails)
- Sporting goods
- Drumheads
- Wind instrument reeds, such as the Fibracell brand
- Speaker woofers
- Boathull material
- Fiber reinforced concrete
- Reinforced thermoplastic pipes
- Tennis strings (e.g. by Ashaway and Prince tennis companies)
- Hockey sticks (normally in composition with such materials as wood and carbon)
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