Spandex Fiber | Production Process of Spandex Fiber | characteristics & Uses of Spandex Fiber

Spandex Fiber | Production Process of Spandex Fiber | characteristics & Uses of Spandex Fiber

Spandex Fiber | Production Process of Spandex Fiber | characteristics & Uses of Spandex Fiber: Spandex is a man-made fiber during which the fiber forming substance is a long-chain synthetic polymer comprised of a minimum of 85% of segmented polyurethane. The Spandex or elastane is 100%  a man-made fiber recognized for its brilliant elasticity (stretchability). It’s stronger and more durable than rubber, its major plant contestant. It absolutely was invented in 1959, and when first introduced it revolutionized many areas of the clothing industry. Spandex is that the preferred name in North America, while elastane is most frequently used elsewhere. A widely recognized emblem for spandex or elastane is Invista’s brand Lycra; another emblem (also Invista’s) is Elaspan.

 

Production Process of Spandex Fiber

Spandex fibers are formed in four different ways including melt extrusion, reaction spinning, solution dry spinning, and solution wet spinning. Each of those methods involves the early step of reacting monomers to provide a prepolymer. Then the prepolymer is reacted further, in several ways, and drawn dead set produce an extended fiber. Since solution dry spinning is employed to provide over 90% of the world’s spandex fibers, it’s described.

 

Polymer reactions

  1. The primary step within the production of spandex is that the production of the prepolymer. This is often done by mixing a macroglycol with a diisocyanate monomer. The compounds are mixed during a reaction vessel and under the correct conditions they react to create a prepolymer. Since the ratio of the element materials produces fibers with variable characteristics, it’s severely controlled. A characteristic ratio of glycol to diisocyanate is also 1:2.
  2. In dry spinning fiber production, the prepolymer is further reacted with an equal quantity of diamine. This is oftencalled a sequence extension reaction. The resulting solution is diluted with a solvent to supply the spinning solution. The solvent helps make the answer thinner and more easily handled. It can then be drove into the fiber production cell.

Producing the fibers

3.   The spinning solution is drove into a cylindrical spinning cell where it’scured and converted into fibers. During this cell, the polymer solution is involuntary through a metal plate, named as a spinneret, which has small holes throughout. This causes the answer to be aligned in strands of liquid polymer. Because the strands have the cell, they’re heated within the presence of a nitrogen and solvent gas. These conditions root the liquid polymer to chemically react and form solid strands.

4. Because the fibers exit the cell, a particular amount of the solid strands are bundled together to provide the required This is often finished a compressed gas device that twists the fibers together. In reality, each fiber of spandex is created from many smaller individual fibers that adhere to 1 another thanks to the natural stickiness of their surface.

 

Final processing

5. The fibers are then preserved with a finishing agent. This couldbe magnesium stearate or another polymer like poly(dimethyl-siloxane). These finishing materials prevent the fibers from stabbing together and aid in textile manufacture. After this action, the fibers are transferred through a series of rollers onto a spool. The windup speed of the whole process will be anywhere from 300-500 mi (482.7-804.5 km) per minute counting on the thickness of the fibers.

 

6. When the spools are stuffed withfiber, they’re put into final packaging and shipped to textile manufacturers and other clients. Here, the fibers are also woven with other fibers like cotton or nylon to provide the material that’s employed in clothing manufacture. This fabric may also be dyed to provide a desired color.

 

Spandex fiber characteristics

  1. It is able to be stretched repetitively and still recover original length.
  2. This fiber can be stretched over 500% without breaking.
  3. This fiber is very lightweight.
  4. Abrasion resistant:                                                                                                                                                                         a)Poor strength, but stronger and more durable than rubber.                                                                                   b)Soft, smooth, and supple.                                                                                                                                             c)Resistant to body oils, perspiration, lotions, and detergents.                                                                                     d)No static or pilling problems

Uses of Spandex Fiber:

  1. Hosiery
  2. Swimsuits
  3. Aerobic/exercise wear
  4. Ski pants
  5. Golf jackets
  6. Disposable diaper
  7. Waist bands
  8. Bra straps
  9. Bra side panels.
  10. Surgical hose
  11. Support hose
  12. Bicycle pants
  13. Foundation garments
  14. Bra cups

 

 

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