Nylon Fiber

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Nylon is a generic name for a family of synthetic polymers, more specifically, aliphatic or semi-aromatic polyamides in which at least 85% by weight of the amide-linkages (-CO-NH-) are attached directly to aliphatic or cycloaliphatic units. They can be melt-processed into fibers, films or any other shape.
The first Nylon fiber was Nylon 6,6, produced in 1935 by Wallace Carothers at DuPont's research facility. The main fiber forming substance is any long chain synthetic polyamide having recurring amide groups in the polymer backbone. Nylon was originally not a generic name for polyamide but the brand name of DuPonts hexamethylene diamine – adipic acid condensation product, called Nylon 6,6. Another important polyamide fiber is Nylon 6 or polycaprolactam. This polymer was developed by Paul Schlack at IG Farben to reproduce Nylon 6,6 without violating DuPont's patent. Nylon 6 is made from caprolactam which self-polymerizes. Other important (specialty) nylons include Nylon 4, Nylon 11, and Nylon 6,10. These fibers are sold under numerous trade names.
Nylon fibers are exceptionally strong and elastic and stronger than polyester fibers. The fibers have excellent toughness, abrasion resistance, and are easy to wash, and to dye in a wide range of colors. The filament yarns provide a smooth, soft, and lightweight fabric of high resilience.
Nylon is used in the garment and home furnishing industry. However, due to its higher price and lesser wrinkle resistance, it has been replaced by polyester in many garment products. Yet, it remains an important fiber for more demanding applications, including tire cords, ropes, seat belts, hoses, conveyer belts, carpets, parachutes, racket strings, sleeping bags, tents, and various civil engineering materials.
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Nylons, or polyamides (PA), are high-performance semi-crystalline thermoplastics with attractive physical and mechanical properties that provide a wide range of end-use performances important in many industrial applications.
While nylon takes many forms, it made its name as a textile fiber and revolutionized the textile industry. According to Fortune magazine in 1940, nylon was the fifth basic textile development in 4,000 years; the others were mercerized cotton, mechanical mass production, synthetic dyes, and rayon. In turn, nylon led to a host of other fibers and plastics that are integral to an advanced industrial society.
About 8 billion pounds of nylon are produced each year in the U.S. Nylon is an artificial fiber. It is durable, strong and resists abrasion.
In 1939, the DuPont company first manufactured NYLON – it was the first synthetic fiber made in the United States. It was used in nylon stockings during wartime, but even after the war became preferred over silk, and quickly replaced silk in most hosiery.
Nylon is made of polymers known as polyamides which contain carbon, oxygen, nitrogen, and hydrogen. Solid chips of these polyamides are melted and forced through a heated spinneret. The spinneret has from one to hundreds of holes. Their size and shape change the characteristics of the resulting fiber. The fiber solidifies as it cools, and can then be spun or woven.
Nylon does not absorb water – this is great for some uses, but also means that nylon fabric and movement combine to create static electricity.
Nylon has some of the look and feel of silk. It is used in sheer hosiery, sails, parachutes, blouses, gowns and veils, swimsuits, lingerie, and even car tires. Nylon has also replaced wool as the fiber most used in carpets. A process called air-texturing adds bulk to the nylon to make it useful as a floor covering.

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