2075 Spandex Sock Yarn

2075 Spandex Sock Yarn

Description : 2075 spandex sock yarn
Type : 2075
Component : 80% polyester and 20% spandex
Color : white ,black and red, more color refer to our color card
Transaction Type : FOB, CIF
Payment type : 30% deposit ,balance before shipment
Place of origin : Yiwu city, Zhejing province, China
Business type : factory outlet
Packing : 8 cones/carton , others depend on customer requirements
Using : weaving, stretch denim, webbing, socks, underwear, lace

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Product Details


Description : 2075 spandex sock  yarn

Type : 2075

Component : 80% polyester and 20% spandex 

Color : white ,black and red, more color refer to our color card

Transaction Type : FOB, CIF

Payment type : 30% deposit ,balance before shipment

Place of origin : Yiwu city, Zhejing province, China

Business type : factory outlet 

Packing : 8 cones/carton , others depend on customer requirements 

Using : weaving, stretch denim, webbing, socks, underwear, lace

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Predraft multiple of spandex?

Spandex Stretch is an important process parameter in the spinning process. It affects the elasticity of Covered Yarn and fabric, as well as the strength, elongation, evenness and creep properties of the coated yarn.The pre-drafting ratio of spandex is too small to give full play to the advantages of elastic fabric. It is difficult to spin when the stretching is too high, and it is easy to break the yarn, so the product quality decreases. In addition, the percentage content of spandex affects the elasticity of the coated yarn, which is high in content and good in elasticity.When the specifications of spandex are fixed, the percentage content of spandex decreases with the increase of drafting ratio, that is, the pre-drafting ratio of spandex is inversely proportional to the percentage content of yarn spandex.

The strength and elongation of air-coated yarn increase with the pre-drafting ratio of polyurethane fibers. When the pre-drafting ratio is increased to a certain value, the shrinkage of polyurethane fibers makes the outer fibers curl. When the pre-drafting ratio is increased properly, the percentage of polyurethane fibers decreases, and the outer fibers curl greatly.But when the drafting is too large, the deformation range of spandex filament is close to the critical value of deformation, which will reduce the strength and elongation of the coated yarn, but is conducive to the evenness of the coated yarn.The phenomenon of deformation changing with time under constant pulling force is called creep. The conventional coated yarn has the best creep resistance when spanning 3.5 times of spandex filament. It is necessary to adjust according to the purpose and adjust the style of the downstream fabric.

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