ACY Yarn vs. SCY Yarn: How to Choose the Right Covered Yarn for High-Stretch Seamless Activewear?

In the rapidly evolving world of performance textiles, the choice between Air Covered Yarn (ACY) and Single Covered Yarn (SCY) is fundamental to the quality of high-stretch seamless activewear. As a leading exporter headquartered in Zhejiang, China, Hengke Textile Technology Co., Ltd. specializes in the marketing of polyester yarn, nylon yarn, and high-performance ACY yarn. With a holistic approach to production speed and quality practices, we understand that for B2B procurement, selecting the correct technical fiber determines the final product's hand-feel, recovery, and durability. Whether you are looking for wholesale ACY yarn for seamless leggings or specialized antibacterial ACY yarn for sportswear, understanding the mechanical differences between ACY and SCY is the first step toward product excellence.

The Mechanical Distinction: Air-Jet Intermingling vs. Mechanical Wrapping

The primary difference between these two yarns lies in their manufacturing process. ACY yarn (Air Covered Yarn) is created by drawing the outer filament and spandex through a high-pressure air nozzle simultaneously. The air jet creates intermittent intermingling points that secure the core. In contrast, SCY (Single Covered Yarn) involves mechanically wrapping the outer filament around the spandex core in a continuous spiral. While SCY offers a more uniform surface, the sustainable ACY yarn manufacturing process is significantly more energy-efficient and faster, making it a preferred choice for large-scale industrial applications.

Technical Comparison of Elasticity and Texture

While SCY typically provides a smoother appearance and higher recovery force for compression garments, ACY offers a softer hand-feel and better breathability, which is essential for seamless technology. ACY is generally more cost-effective due to higher production speeds, whereas SCY requires more specialized mechanical wrapping equipment.

Optimizing Performance for Seamless Activewear

For the seamless knitting industry, the consistency of polyester air covered yarn specifications is critical to prevent "barré" effects or uneven dyeing. Recent 2024 industry data from the International Textile Manufacturers Federation (ITMF) highlights that the demand for air-covered technologies is increasing by 6% annually due to the shift toward "athleisure" which prioritizes comfort and soft-touch over pure mechanical compression.

Sourcing from high elasticity nylon ACY yarn suppliers

When engineering leggings or sports bras, sourcing from high elasticity nylon ACY yarn suppliers ensures that the garment can withstand repeated elongation without losing its shape. Nylon-based ACY is particularly favored in the high-end market for its superior moisture-wicking properties and skin-friendly texture compared to traditional polyester blends.

Technical Specifications and B2B Procurement Standards

Engineers must look closely at the intermingling point density (measured in knots per meter) when reviewing polyester air covered yarn specifications. A higher knot density ensures better stability during the knitting process, reducing machine downtime. Furthermore, the integration of antibacterial ACY yarn for sportswear has become a standard requirement in 2025, as consumers demand long-lasting odor control in their athletic apparel.

Market Trends in Sustainable Fiber Production

Sustainability is no longer optional. According to the 2025 Textile Exchange Market Report, the industry is moving rapidly toward recycled spandex and bio-based nylon. Implementing a sustainable ACY yarn manufacturing process not only reduces the carbon footprint but also aligns with the ESG goals of major global retail partners.

Efficiency and Dyeing Affinity Comparison

ACY yarn generally exhibits a better dyeing affinity for deep colors due to the air-texturized loops, whereas SCY may require higher temperature settings to achieve the same saturation because of its dense mechanical wrap.

Conclusion: The Hengke Holistic Approach

Choosing between ACY and SCY depends on the specific compression and aesthetic requirements of your seamless collection. At Hengke Textile Technology Co., Ltd., we combine production speed with a transparent business model to deliver premium nylon yarn and ACY yarn solutions. From wholesale ACY yarn for seamless leggings to the latest in sustainable ACY yarn manufacturing process, our team in Zhejiang and Jiangsu is dedicated to helping you scale your textile business with quality and integrity.

Frequently Asked Questions (FAQ)

• Why is ACY yarn better for seamless leggings? ACY provides a softer, flunkier texture that enhances wearer comfort in seamless designs while being cost-effective for mass production.
• Can I customize the polyester air covered yarn specifications? Yes, we can adjust the denier of both the outer filament and the spandex core to meet your specific stretch and weight requirements.
• What are the benefits of antibacterial ACY yarn for sportswear? It inhibits the growth of odor-causing bacteria, ensuring the garment remains fresh even after intense physical activity.
• Is ACY more sustainable than SCY? Generally, yes. The air-covering process uses significantly less electricity and mechanical energy compared to the high-speed rotation required for mechanical wrapping.
• How do high elasticity nylon ACY yarn suppliers ensure quality? We use high-precision air nozzles and continuous electronic monitoring to ensure consistent intermingling points across every bobbin.