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SCY (Single Covering Yarn)

SCY (Single Covering Yarn)

SCY mechanically covered yarn is to wind the outer layer of the covered yarn (such as nylon stretch yarn, etc.) onto an aluminum tube in advance, fix the aluminum tube with the yarn on the rotating spindle, and set the wrapping twist and spandex draft ratio. After the yarn wrapping machine is started, the spandex passes through the empty tube in the center of the spindle and is combined with the yarn head on the aluminum tube to be introduced into the drafting roller. As the spindle drives the aluminum tube to rotate, the outer layer of yarn is spirally wound on the spandex to form a tight, mechanically covered yarn. Machine bags are widely used and can be made of DTY, HOY, FDY, cotton, linen, viscose filament, etc. Compared with empty bags, nylon wrapped with spandex is tighter and more secure, and the twist can be very high. After being woven into fabrics, the fabric texture is clearer, the fabric appearance is high-grade, and the fabric feels softer and has less hairiness, so it is wear-resistant and anti-pilling, and is an ideal material for elastic fabrics and fabrics.

Product Parameters

 

Product

Specifications

Filament

Draft

TPM

Color

SCY

1508

3f

1.8-3.5

2800-3200

Black/Raw

1510

3f

1.8-3.5

2500-3000

Black/Raw

2008

3f

1.8-3.5

2800-3200

Black/Raw

2012

5f

1.8-3.5

1800-2500

Black/Raw

2020

20f

1.8-3.5

800-1200

Raw

2030

14f/20f

1.8-3.5

600-1000

Raw

2040

24f/34f

1.8-3.5

500-800

Raw

2050

24f/36f/48f

1.8-3.5

400-800

Raw

3020

20f

1.8-3.5

800-1200

Raw

3030

14f/20f

1.8-3.5

600-1000

Raw

3040

24f/34f

1.8-3.5

500-800

Raw

3050

24f/36f/48f

1.8-3.5

400-800

Raw

 

Please get in touch with us if you need specifications or processes different from the above table. Contact information: [email protected]

 

Product Knowledge of Air Covering Yarn and Conventional Covering Yarn

I. Product Definitions

Air Covering Yarn 

● During production, high-speed airflow is utilized to encapsulate two or more types of fibers or yarns together.
● Structure: The core yarn is loosely wrapped, with gaps existing between the fibers. Intermittent bonding points adhere spandex and nylon; the Air Covering yarn partially exposes the spandex, resulting in a looser structure.

 

Conventional Covering Yarn

● Mechanical devices (such as spindles and rollers) are employed to tightly wind outer fibers around the core yarn, forming a uniform and dense covering layer.
● Structure: The core yarn is tightly wrapped, with fibers arranged regularly.

 

 

II. Comparison of Processes and Properties

 

Comparison Dimension

Air Covering Yarn

Conventional Covering Yarn

Production Process

Relies on airflow, no complex machinery

Relies on mechanical winding devices, more precise control

Covering Density

Loose covering, core yarn and outer fibers are less tightly combined

Tight covering, outer fibers evenly adhere to the core yarn

Elasticity and Loftiness

High elasticity, soft and fluffy (suitable for elastic products)

Lower elasticity, compact structure (suitable for shaping needs)

Strength and Wear Resistance

Lower strength, prone to pilling

High strength, great wear resistance

Cost

Lower equipment investment, less energy consumption

Higher equipment investment, greater energy consumption

 

 

III. Yarn Application Areas

 

Yarn Type

Application Areas

Product Advantages

Air Covering Yarn

Knitted, woven, athletic wear, underwear (seamless underwear), shapewear, socks, medical bandages, and other textiles requiring high elasticity, softness, and comfort.

Good air permeability, fitness body, suitable for dynamic stretching.

Conventional Covering Yarn

Knitted, woven, seamless underwear, socks, outdoor sportswear, workwear fabrics, industrial fabrics, and other textiles requiring high strength, abrasion resistance, and washability.

Smooth surface, anti-pilling, suitable for products requiring shaping and durability.

 

 

IV. How to Choose Yarn?

 

Choose Air Covering Yarn: When elasticity and softness are prioritized (such as seamless underwear, yoga pants, elastic socks). You can choose our 2030, 2050 products , or customization is available.

Choose Conventional Covering Yarn:  When anti-pilling and abrasion resistance are prioritized (such as seamless underwear, outdoor sportswear, high-end fabrics). You can choose our 3030, 4030 product, or customization is available.

SCY single covering yarn, which involves pre-winding the outer layer of yarn onto the aluminum spool and securing these loaded tubes on rotating spindles. Once the machine starts, the spandex is set with an appropriate draw ratio, and the core spandex from the center hollow tube of the spindle is combined with the yarn end on the aluminum tube, and then guided into the stretching rollers. Due to the rotation of the spindle driving the aluminum tube, the outer yarn spirally wraps around the spandex, forming a tightly mechanically wrapped yarn. The material for single-covering yarn is versatile, including DTY, HOY, FDY, etc. Fabrics made from SCY yarn have clearer weave patterns, higher-quality appearance, a softer feel, and fewer fuzzies, making them more wear-resistant and anti-pilling. It is ideal for weaving elastic fabrics and materials.

About Narik
Company Profile

As the high-end international yarn brand of Jinzili Group, Narik carries forward the Group’s deep industry expertise. Since its establishment in 2017, Narik has been dedicated to technological breakthroughs and product innovation in the seamless textile industry.
Its parent company, Jinzili Group which was established in 2001, is headquartered in Yiwu, Zhejiang—China’s hub for seamless underwear. The company specializes in the R&D, production, and sales of a wide range of yarns, utilizing PA6 as raw materials. Its product portfolio includes POY, FDY spinning, DTY elastic yarn, ACY synthetic fiber, SCY synthetic fiber, colored elastic fiber, and eco-friendly recycled fiber.
As one of the earlier and stable yarn suppliers in China, Jinzili Group has served 1,000+ clients worldwide with products that are widely used in seamless underwear, yoga wear, socks, and one-piece leggings. Today, the Group operates three major yarn production bases, ensuring strong supply capabilities—and continues to expand.

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Industry knowledge

Single Covering Yarns

Composite yarns with single covering fiber around spandex/rubber core, balancing elasticity and strength. Used in stretch textiles (socks, sportswear) for durability and controlled stretch.

Covered Elastomeric Yarns

Elastic core + covering yarns (nylon/polyester), providing stretch (core) and stability/texture (outer). Manufactured via wrapping/air covering, adjustable for fabric needs. Enhance garment comfort, shape retention, and core protection from abrasion/UV, extending lifespan. Available as single/double cover for fashion, medical, industrial uses.

Elastic Covered Yarns

Elastic core (spandex) + non-elastic outer fibers, offering controlled stretch/recovery. Mechanical (structured) or air (soft) covering. Protect cores from damage, used in socks, waistbands, undergarments for comfort and dimensional stability.