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What is covered yarn?
Covered yarns – yarns that consist of at least two yarns. The yarn that is wrapped around gives the looks whereas the core (the fine wire) still provides the functionality (like conductivity).

What is spandex used for?
Spandex is used to make garments where a lot of permanent elasticity is required, e.g. in tights, sportswear, swimwear and corsetry. It is used in garments that are intended to cling to the body, while at the same time remaining comfortable. For this type of garment 15 – 40% spandex is used.

What is air covered yarns?
Air Covered Yarn is a regular intermingled yarn, the covering filament yarn and Spandex are drawn meanwhile from a special jet nozzle where the yarns are air-jetted at regular intervals by high compressed air. The Air-jet Covered Yarn needs sizing for warp knitting and can be used for weft knitting directly.

Where covered yarn is used?
DOUBLE-COVERED YARNS Flat or textured polyamide yarns can be used to create the double covering. Double-covered yarn is used for the high-end and top-quality clothing, lingerie and hosiery markets.

What is T400 yarn?
Lycra T400 fiber is a multi-component yarn in which different polymers are joined together within each filament. Since the crimp is not mechanically induced, Lycra T400 fiber gives greater, more durable stretch and recovery, as well as a softer, smoother hand than textured yarns.

What is nylon spandex fabric?
http://www.fengdafiber.com/covered-yarn/