ACY vs. SCY: Key Differences in Textile Manufacturing   At CITIC Nanyang , we specialize in high-quality polyester products, including Air-Covered Yarn (ACY) and Spandex-Covered Yarn (SCY) . Understanding their differences helps in choosing the right yarn for textile applications.   Production Process • ACY: Spandex is covered with polyester or nylon using compressed air, creating a smooth and uniform appearance. • SCY: Spandex is mechanically twisted with filament yarn, resulting in a firmer structure and enhanced elasticity.     Key Differences 1. Elasticity & Stretch • ACY: Moderate elasticity, ideal for comfort. • SCY: Higher elasticity and better recovery. 2. Appearance & Texture • ACY: Smoother and softer. • SCY: Textured and firmer. 3. Dyeing & Colorfastness • ACY: Easier to dye, vibrant colors. • SCY: More compact, retains color well. 4. Applications • ACY: Hosiery, seamless wear, activewear. • SCY: Denim, socks, shapewear. 5. Cost Efficiency • ACY: More cost-effective, faster production. • SCY: Pricier but offers greater durability.   Choosing the Right Yarn • For lightweight comfort → Choose ACY • For high elasticity & durability → Choose SCY   At CITIC Nanyang , we provide premium-quality yarns tailored to your needs. Contact us for expert guidance on selecting the best yarn for your applications.