This also enhances the flexibility, Longitudinally, it shows fibers of similar diameters, Cross-sectional: it shows the different shapes of filaments. Contrary to popular belief, the term "spandex" is not a brand name, and this term is used to generally refer to polyether-polyurea copolymer fabrics that have been made with a variety of production processes. From the percentage of spandex, an approximate denier can be calculated. Production Process of Spandex Fiber This in turn affects the appearance of the fabrics and thus the overall Most of these garments are skin-tight and often dry faster than ordinary fabrics. The classic AC air covering machine can produce the spandex fibers through any of the following means: All the above methods feature an initial step that involves the reaction of monomers to produce a pre-polymer. It is used for making different types of light apparel. Industrially, spandex is called lycra. Specific test method is used to test the elongation recovery after stretching the yarn up to 300% elongation. The product is then mixed with a solvent to dilute it and give it a spinning solution. Swimwear and lingerie owe their figure-flattering fit to LYCRA®. The classic AC air covering machine can produce the spandex fibers through any of the following means: It could be elastic 5 to 7 times of its original length. Draft ability properties: Draft ability properties are tested under dynamic condition. Chemical Composition of Glass Fiber Production, Handloom Products With Places Of Production | Handloom Products For Local And International Business, Services Given By Bangladesh Handloom Board (BHB) | BHB Potential, Bangladesh Handloom Board || Vision || Mission|| Function of BHB, Production And Productivity || Basic Concepts Of Productivity, Sewing Needle Selection || Important Points For Selection Of Sewing Needle. Has a serrated structure that holds it in place and prevents it from slipping. Spandex is a term used as an anagram for the word expands. Spandex is used in a wide range of garments due to its high elasticity and significant strength. Effect of bleaching: Bleaching agent damages the fiber and it becomes weak. Kabao Industries produces ACY fibers that have an extension-at-break greater than 200 percent and show … Single jersey knitted fabrics are generally used to make underwear and outerwear such as T-shirts. A draft of 1 (1:1 ratio) is no elongation at all. Physical Properties of Spandex: The physical properties of spandex are given below. The core component was spandex with 20D and 40D while sheath consisted of lyocell yarn; eco-friendly regenerated cellulosic Spandex fiber, also known as Lycra or elastane, is a long-chain polyurethane-polyurea copolymer that is composed of flexible macro-glycol segments and rigid di-isocyanate segments arranged in a specific order. Nylon is a man-made synthetic fiber that is strong while very light in weight, properties that lead to a wide variety of uses, such as fabric, rope and luggage.This fiber was first introduced in the 1930s as an early substitute for silk; it eventually became the fiber of choice for women's stockings. It is a polyether - polyurea copolymer that was invented in 1958 by chemist Joseph Shivers at DuPont 's Benger Laboratory in Waynesboro, Virginia. This should give you an acceptable fabric. Spandex is a synthetic fabric that is prized for its elasticity. Your email address will not be published. If the spandex has been heat set, weigh a piece of the fabric and then remove either fiber and weigh again. How calculate lycra denier in a piece of fabric to produce same quality. It is very light in weight. Spandex yarns and fabrics are outstanding in terms of wear properties, comfort and functionality along with remarkable stretch and recovery properties. Lycra is a brand name for elastane, which is a highly elastic synthetic fabric. Two types of pre-polymers are reacted to produce the The fabric must be deconstructed and the length and weight of several pieces of spandex used to calculate the denier. Of all the above-listed methods, the solution dry spinning is the most common and produces approximately 94.5 percent of the world’s spandex fibers. Introduce New Product, Service and Material | COADEngineering. Rubber is produced naturally or synthetically while Spandex can only be synthetically manufactured. The incorporation of spandex to the fabric structure effects many of the fabric properties. Spandex yarn is ordinarily used in athletic or dynamic dress. FTC (Federal Trade Commission) Definition-A manufactured fiber in which the fiber forming substance is a long-chain synthetic polymer comprised of at least 85% of a segmented polyurethane. This is easily done if the spandex has not been heat set. The first step produces the pre-polymer by mixing diphenylmethane diisocyanate monomer with micro polyester in a reaction vessel. Spandex and rubber are often mistakenly thought of to be the same due to their common property to impart “Stretch”, but in reality, both of these are extremely different. What type of denier has been used so for? After dilution into a thinner solution, it’s then pumped into the fiber production cell. Spandex is called elastomeric fiber because it is come from elastomer polymer. Cotton-covered spandex yarn: Predicting tensile properties In the prediction of tensile properties of cotton-covered spandex yarn, the ANN model shows considerable lower mean square error (MSE) than the multiple regression analysis in both testing and training data, reveal M H Elshakankery, Mona M Salem and M M Mourad. 3. It is an elastomer, which means it can be stretched to a certain degree and it recoils when released. Most weft knitting processes us a draft of 2.0 to 3.0. The fiber is characterized by its exceptional elastic and recover properties. Test various draft/denier combinations until you get close to the spandex percentage. Some applications of spandex are: Your email address will not be published. Can be degraded by concentrated alkalis at high temperatures. It’s then forced into a metal plate called a spinnerette. … These fibers are superior to rubber because they are stronger, lighter, and more versatile. From this information, you can calculate a percentage of spandex by weight. From the percentage of spandex, an approximate denier can be calculated. It can be used as a representation of the huge milestones we have made in the development of man-made fibers. Spandex is a 100% synthetic fiber. Microstructures and mechanical properties of melt spinning spandex were studied in this article.Cross section and longitudinal surface were observed and analyzed by JSM-5610LV scanning electron microscopy. Test various draft/denier combinations until you get close to the spandex percentage. This is not a practical draft. This is easily done if the spandex has not been heat set. Your email address will not be published. A widely recognized emblem for spandex or elastane is Invista’s brand Lycra; another emblem (also Invista’s) is Elaspan. Spandex Fiber. The hard yarn and spandex are run into the fabric in the same amounts. The resulting fibers are treated with a polymer such as magnesium stearate to prevent the fibers from sticking together. Our findings show that the spandex drawing ratio and structures of the woven fabrics significantly affect the physical and mechanical properties of the cotton/spandex woven fabrics. Compressing or elongating the individual stitches that form the fabric must be deconstructed and the and... Turn then it recovers its original length this is easily done if the spandex been. 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Suppliers, dealers & exporters are offering best deals for polyester spandex fabrics technology, the... Used to calculate the denier produces the pre-polymer by mixing with cotton or other fiber reacted in various using... Most valued properties that can not be published | COADEngineering more absorbent than the monofilament fibers have. A diamine of equal amount pre-polymers which produce the backbone of the production. '' is an elastomer, which are not elastomeric, do not have ability. `` spandex '' is an anagram for the fact that it 's a weak fiber that is for... Full range of specifications and rich variety to dilute it and give it spinning. Spandex by weight Lycra is a synthetic fabric that is prized for its exceptional elasticity cured... Strength, it shows fibers of similar diameters, Cross-sectional: it has power! A consequence, single-knit fabrics may have permanent deformation referred to as dorlastan or Lycra for... 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