Covered Spandex Yarn
Spandex covered yarn is made of spandex yarn as the core and long Elastic yarn is formed by covering the elongated spandex yarn with silk or short fiber yarn in a spiral manner.
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Classification
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according to Number of covering layersSpandex covered yarn Can be divided intoSingle claddingandDouble coatingTwo kinds, the difference lies in the appearance The number of layers of covering silk (yarn) and the degree of wrapping are different.
Single covered yarn is a core yarn covered with a layer of outer yarn (yarn) on the outer layer of spandex. The number of turns is small, and the exposed core of the fabric is more obvious, so it is not suitable for dark-colored products. Mainly used for elastic fabrics such as socks and weft knitted underwear.
Double covered yarn
It is to cover the outer layer of spandex core yarn with two layers of filament or yarn. The two layers of coating are generally in opposite directions. The core yarn spandex is well covered and the exposure phenomenon is light. Since the outer yarn is symmetrically wrapped around the core yarn at opposite helix angles, the elasticity of the wrapping yarn is well balanced. Generally, subsequent processes can be carried out without shaping treatment. Processing, but the processing cost of double covered yarn is higher. Mainly used for elastic fabrics such as leggings, elastic bands, sock openings, and stockings.
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According to Equipmentdifferent can be divided intoMechanical cladding YarnwithAir covered yarnTwo kinds.
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Specifications and uses
Spandex covered yarn is mainly used for applications requiring high elasticity Fabrics, partially used for woven fabrics. Fabrics woven with covered yarn are thicker and are especially suitable for weaving sports tights, such as swimwear, ski suits, etc.
The difference between core-spun yarn and covered yarn
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The difference between the two is as follows: spandex core-spun yarn and spandex covered yarn. Spandex core-spun yarn is spandex wrapped with short fibers. It uses spandex yarn as the core and is wrapped with non-elastic short fibers. The core yarn is generally not exposed when stretched. Spandex covered yarn is an elastic yarn formed by wrapping spandex with chemical fiber filaments. It also uses spandex yarn as the core and non-elastic short fibers or filaments to cover the elongated spandex yarn in a spiral manner. There is core exposure in the tensioned state.
✪ The equipment produced is different. Core-spun yarn is a short fiber made on a spinning machine, covered yarn is made on a splicing + double-twisting machine, and long-fiber covered yarn is made on a long-fiber double-twisting machine.
✪ The core yarn of core-spun yarn is wrapped by fibers. If their core yarn is well wrapped, you cannot see the core yarn. of. The technological route of staple fiber covered yarn is as follows: one or more yarns are first spliced, and then the spliced yarn bobbin is put on a two-for-one twisting machine to twist and wind the resulting yarn. All the yarns put together by this covering yarn, namely the core yarn and the outer covering yarn, are visible.
✪ Core-spun yarn is usually used on a spinning frame. When drafting the roving, the textile raw materials that need to be wrapped in it are added. Such as cotton wrapped in spandex; polyester, viscose wrapped in spandex; cotton wrapped in polyester filament; polyester wrapped in polyester filament, etc. The covered yarn actually uses a twisting machine, one yarn is used as the core yarn, and the other yarn is wrapped around the outside. For example, spandex is used as the core yarn and is wrapped with polyester, nylon, etc.
