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Contents on the CD Rom

• Spandex or elastane is a synthetic fiber known for its exceptional elasticity.
• Elastane fibres, better known under their trade names, Lycra and Dorlastan, represent a further high point in the development of man-made fibres.
• Spandex is a generic name for a polyurethane fiber in which the fiber-forming substance is a
  long chain of synthetic polymer comprised of at least 85 percent of a segmented polyurethane.
• Invented in 1937 in Germany, elastane has properties not found in nature, the most important being an  extraordinary elasticity.
• The most famous brand name associated with spandex is Lycra, a trademark of Invista.
• Spandex is a block copolymer of polyurethane and polyethylene glycol.
• Spandex fibers are produced in four different ways including melt extrusion, reaction spinning, solution dry spinning, and solution wet spinning.
• All of the methods include the initial step of reacting monomers to produce a prepolymer. Once the prepolymer is formed it is reacted further in various ways and drawn out to produce a long fiber.
• The solution dry spinning method is used to produce over 90% of the world's spandex fibers.
• Compared to rubber, elastane has both greater tear resistance and durability and a tension capacity two or three times greater, at a third of the weight.
• Elastane has the highest stretch tension of all textile raw materials.
• Elastane fibers guarantee a high degree of comfort combined with great freedom of movement.
• Elastane is not sensitive to transpiration, make-up, cosmetics, sun cream or sea water.
• In China Famous Town of Spandex Yarn- Jingang town of Zhangjiagang city, the spandex yarn industry has developed to a certain scale, accounting for 30% of the country’s total.

• Spandex
• Fiber History
• The elastic revolution
• Specialty Fibers

Process

• Spandex Fiber Manufacturing Process Description
• Fiber and Filament
• Fiber Manufacturing
• Laboratory and Pilot plants for the production of Elastane yarns using wet or dry spinning methods
• MER 3 - Elastane Roller

Properties

• Influence of Selected Process Variables on the Mechanical Properties of Core-Spun Vortex Yarns Containing Elastane
• Stretch and Bagging Properties of Denim Fabrics Containing Different Rates of Elastane
• Approximate Study on a Tensile Model of Wool/ spandex Core-spun Yarn
• The Effects of Elastane Yarn Type and Fabric Density on Sewing Needle Penetration Forces and Seam Damage of PET/Elastane Woven Fabrics

Patent and Technology

• Apparatus and method of covering spandex yarn
• Spandex covered tightly with shrinkable nylon and process for producing it
• High chlorine and heat resistant spandex fiber and manufacturing method thereof
• Process for the production of elastane fibers by inclusion of a combination of PDMS and ethoxylated PDMS in the spinning solution
• Acrlic-Covered Spandex Yarn
• Hoisery finishing process for treating fabrics containing Spandex yarn
• Method of manufacturing a composite yarn having a spandex core and a texturized thermoplastic covering
• XLA fiber technology

Primary Information Services
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