Recent Developments in High Performance Fibres By - Fibre2fashion

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ones together. Spidersilk What is spider silk made of? It is a fibrous protein secreted as a fluid, which hardens as it oozes out of the spinnerets, which are mobile finger-like projections. As the fluid oozes out, the protein molecules are aligned in such a way that they form a solid; the process is not yet well understood. The spider hauls out the silk with its legs, stretching, fluffing it up or changing it in other ways to suit the purpose at hand. Weight for weight, spider silk is up to 5 times stronger than steel of the same diameter. It is believed that the harder the spider pulls on the silk as it is produced, the stronger the silk gets. Spider silk is so elastic that it doesn't break even if stretched 2-4 times its length. Spider silk is also waterproof, and doesn't break at temperatures as low as -40C. There are 7 types of silk glands and "nozzles" but no spider has all 7 types The material is elastic and only breaks at between 2 - 4 times its length. In the pictures a strand of a social spider, stegodyphus sarasinorum, is shown as normal size, stretched 5 times and 20 times its original length. Spider's silk is made up of chains of amino acids. In other words, it is simply a protein. The two primary amino acids are glycine and alanine. Spider silk is extremely strong -- it is about five times stronger than steel and twice as strong as Kevlar of the same weight. Spider silk also has the ability to stretch about 30- percent longer than its original length without breaking, which makes it very resiIient. Aramids High tenacity aramide fiber Organic fibers closely related to the nylons, aramids are polyamides derived from aromatic acids and amines. Because of the stability of the aromatic rings and the added strength of the amide linkages, due to conjugation with the aromatic structures, aramids exhibit higher tensile strength and thermal resistance than the aliphatic polyamides (nylons). The para- aramids, based on terephthalic acid and p-phenylene diamine, or paminobenzoic acid, exhibit higher strength and thermal resistance than those with the linkages in meta positions on the benzene rings. The greater degree of conjugation and more linear geometry of the para linkages, combined with the greater chain orientation derived from this linearity, are primarily responsible for the increased strength. The high impact resistance of the para-aramids makes them popular for "bullet-
proof" body armor. For many less demanding applications, aramids may be blended with other fibers. High resistance aramide fibers Teiji conex is a meta linked aromatic polyamide fiber known for its heat resistance. It is a synthetic organic fiber comprised of polymetaphenylene iosthalic amide, which is formed by reaction from metaphenylenediamine and isophthaloyl chloride. It decomposes at 4000C and having Lol 30. It is a white, highly functional fiber, which can be used for clothing to industrial material. Continuous meta-type amide bonds to benzene rings render the following properties: 1) High melting point and decomposition point. 2) High glass transition point. 3) Low oxidation decomposition rate. General properties • High modulus. • High tenacity with low weight. • Low electrical conductivity. • High cut resistance. • High chemical and temperature resistance. • Low thermal shrinkage. • Excellent dimensional stability. • Do not corrode. Cut resistance aramide fiber HDPE (high-density polyethylene) It can be extruded using special technology to produce very high molecular orientation. The resulting fiber combines high strength; chemical resistance and good wear properties with lightweight, making it highly desirable for applications ranging from cut-proof protective gear to marine ropes. Since it is lighter than water, ropes made of HOPE float. Its primary drawback is its low softening and melting temperature.
Page 1 and 2: Recent Developments in High Perform
Page 3 and 4: Ultra High Molecular Weight Polyeth
Page 5 and 6: Magic fiber for AIDS diagnosis and
Page 7: Wipes and absorbed pads: Addition o
Page 11 and 12: Uses • Fire Blocking Fabrics: Air
Page 13 and 14: Power fibers that store solar energ
Page 15 and 16: Kevlar Five times stronger than ste

Recent Developments in High Performance Fibres By - Fibre2fashion

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