WillPro ACELAN Spandex Yarnx

ACELAN Spandex Yarn
SPANDEX SPECIFICATION/OPTION:
20 DENIER(22DTEX)ACELAN Spandex Yarn
30 DENIER(33DTEX)ACELAN Spandex Yarn
40 DENIER(44DTEX)ACELAN Spandex Yarn
70 DENIER(77DTEX)ACELAN Spandex Yarn

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Spandex Fibre

Spandex can be used in Warp Knitting, Circular Knitting, Covering and other kintting, Spandex fabric is widly used in kintting various fabric. Spandex can be blended with Polyester, Nylon ,Cotton , Rayon and Bare Yarn , Covered Yarn, Core Spun Yarn.

Spandex is the generic name for elastomeric synthetic fibers with a superb elongation property and at least 85% of polyurethane bonds as its composite material.  
WillPro Spandex can be used together with polyester, nylon, cotton, rayon in many field like warp knitting, circular knitting, covering and core spun yarn. In order to meet the different needs of our customers, we are focussing our efforts on developing new technologies to enhance the unique properties of spandex.
At this present, our factory focusing our efforts on developing new technologies to enhance the unique properties of spandex and better meet the specific needs of different and products.

Covering
Spandex Fibre/Spandex yarn Covering is a coating process that consists of wrapping nylon, polyester or cotton once or more, depending on the final usage, around an spandex yarn | spandex fabric.
The covered yarn is used mainly for stockings, woven, circular knits or narrow fabrics like bands. Because the spandex is covered with the coating yarn, there is no need to control the tension of fabric in fabric knitting and weaving.

Circular Knitting
Circular knitting is a process of knitting yarns by forming loops in the weft direction. When using Spandex Fibre in uncovered state, a spandex feeding device is required. In using spandex in the covered state, a spandex feeding device is not required.

Warp Knitting
Warp Knitting is a process of knitting where is a large number of warp yarns that form loops progressing horizontally and forming a slanted zigzag pattern. Warp knitting requires a careful selection of grey yarn, since all the yarns are wound on the beam at the beaming stage and supplied simultaneously during the knitting stage.
The criteria for selecting grey yarn are the surface evenness level, condensity level, denier evenness level, degree of unwinding, uniformity of yarn length and the appropriate level of tenacity and Stretchity.
Important factors during spandex beaming
- Work condition: humidity 60~70%, temperature 20~25¡æ.
- Spandex requires preconditioning under the above conditions before beaming take place.
- Anti-static bars should be installed.

Scouring
Since Spandex Fibres have at least 2-5% surface oil, proper scouring is essential. Scouring is the processes that remove various oils and impurities on the spandex fabric surface. Generally, it can be separated into tow methods. The first method is the continuous or non-continuous water scouring method that uses the scouring in a hot bath of 80-90¡æ and is usually applied to fabrics with low spandex contents. The second method is the continuous solvent scouring method that is best for warp-knitted fabrics with a spandex content of up to 15-20%.

Relaxation
Relaxation is an indispensable first step of the finishing process that preserves the Stretchity of the fabric to be maintained at an appropriate level and also releases any built into the fabric during weaving, knitting or transportation. Relaxation should be done as a wet process in a hot bath of 80-100¡æ or by steaming, however it is usually integrated into the scouring process instead being done separately. Utmost care should be given during this process, because improper treatment during this process results in shape distortion.

Bleaching
There are usually tow types of bleaching. One is a continuous method that uses a brightening agent and a padding method during the pre-treatment phase, and the other is a non-continuous method that takes place in a 90-95¡æ bath for 30-60min.

Dyeing
Although there is a variance in the dyeing methods depending on the spandex or synthetic yarns in the fabric, the usual recommended temperature for batch or continuous dyeing should not exceed 130¡æ in order to retain the Stretchity of the spandex in the fabrics.

Heat Setting
Heat setting that gives dimensional stability and set s the width and weight of the fabric is the most important process for spandex blends fabric.
Appropriate temperature and contact time are required as an extended process time or highly set temperatures could stress the relaxed spandex fabric or damage its Stretchity.

Finishing
Although there is a slight variance depending on the yarn that is knitted with spandex, spandex fabrics do not require special finishes. Softening finishes, anti-static finishes, anti-resistant resin finishes are sometimes applied, usually at a temperature of 170-190¡æ, in order to improve the touch of the fabric.

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