Synthetic fiber liner from--Aramid Fiber
Aramid Fiber Characteristics
Aramids are generally prepared by the reaction between an amine group and a carboxylic acid halide group. Simple AB homopolymers may look like
n NH2−Ar−COCl → −(NH−Ar−CO)n− + n HCl
The most well-known aramids (Kevlar, Twaron, Nomex, New Star and Teijinconex) are ABB polymers. Nomex, Teijinconex and New Star contain predominantly the meta-linkage and are poly-metaphenylene isophthalamides (MPIA). Kevlar and Twaron are both p-phenylene terephthalamides (PPTA), the simplest form of the AABB para-polyaramide. PPTA is a product of p-phenylene diamine (PPD) and terephthaloyl dichloride (TDC or TCl). Production of PPTA relies on a co-solvent with an ionic component (calcium chloride (CaCl2)) to occupy the hydrogen bonds of the amide groups, and an organic component (N-methyl pyrrolidone (NMP)) to dissolve the aromatic polymer. Prior to the invention of this process by Leo Vollbracht, who worked at the Dutch chemical firm Akzo, no practical means of dissolving the polymer was known. The use of this system led to an extended patent dispute between Akzo and DuPont.
No melting point
Good fabric integrity at elevated temperatures
Para-aramid fibers, which have a slightly different molecular structure, also provide outstanding strength-to-weight properties, high tenacity and high modulus.
heat-protective clothing and helmets
body armor, competing with PE-based fiber products such as Dyneema and Spectra composite materials
asbestos replacement (e.g. brake linings) 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)
wind instrument reeds, such as the Fibracell brand
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)
jet engine enclosures
Replacement of the traditional C-type fuse tube with bone fiber. The core of this “Arc Quenching Fuse Tube” is made of proprietary formula consists of polyester fiber, epoxy and Aluminum Tri Hydrate (ATH).
Compare to the bone fiber fuse tube:
- ATH filler is used as the water source in the synthetic arc quenching core.
- The amount of filler is controlled to provide just the right amount of water for efficient interruption
- More durable than traditional bone fiber fuse tube resulting in overall operation cost saving and less frequent fuse tube replacement.
- Environmental friendly