T: +86-13758587081
E: longtaiyarn@sina.com
E: longtaiyarn@sina.com
Longtai Textile, Building 58, Yuwang Xincun, Datang Street, Zhuji City, Shaoxing City, Zhejiang Province, China.
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Our ACY 40 75D/24F Polyester DTY Spandex Covered Yarn is a high-elasticity solution for modern textiles, designed to deliver comfort, support, and durability in stretch fabrics. This innovative yarn features a spandex core (20% by weight) covered by a polyester DTY (draw-textured yarn) outer layer using air-covered yarn (ACY) technology—where compressed air wraps the polyester around the spandex core uniformly. This construction delivers 8–10% stretch and 98% recovery after 1,000+ cycles, ensuring garments retain their shape through repeated wear. Ideal for sportswear, swimwear, and compression garments, it combines dynamic stretch with moisture-wicking performance, making it a favorite for active and body-hugging designs.
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4075D/24F
Longtai
Our ACY 4075D/24F polyester DTY spandex air covered yarn is a professional-grade, high-elasticity textile solution engineered exclusively for large-scale garment and fabric production enterprises. Manufactured in Zhejiang, China under the Longtai brand, this innovative yarn features a 20% high-elasticity spandex core uniformly wrapped by an 80% high-tenacity 75D/24F polyester DTY yarn outer layer, using advanced air covered yarn (ACY) technology. With 8–10% controllable stretch and 98% elastic recovery after 1,000+ stretch cycles, this industrial stretch yarn delivers consistent shape retention, comfort, and durability for form-fitting, high-performance fabric manufacturing.
Every batch of our bulk air covered yarn for knitting undergoes strict uniformity testing, eliminating batch-to-batch variations in elasticity, yarn count, and tensile strength. This ensures seamless performance in high-speed warp and weft knitting machines, reducing downtime, defect rates, and material waste for mass production lines.
With a Martindale abrasion resistance rating of 50,000+ cycles and a protective polyester layer that extends spandex service life by 50% compared to uncovered spandex, this yarn reduces product return rates and extends the lifespan of finished garments, delivering long-term cost savings for bulk buyers.
Our OEKO-TEX certified polyester spandex yarn holds OEKO-TEX® Standard 100 and Bluesign® certifications, meeting the strictest environmental and safety standards for global markets, including the EU, North America, and Asia-Pacific regions.
Core Material: 80% high-tenacity 75D/24F polyester DTY yarn + 20% 40D high-elasticity spandex core
Yarn Count: 40s (11–13 tex), medium-fine count for lightweight stretch fabrics
Elastic Performance: 8–10% stretch under 500g load, 98% elastic recovery after 1,000+ stretch cycles
Breaking Strength: 3.5–4.8 cN/dtex
Moisture Wicking Rate: 0.3 g/min
UV Protection Rating: UPF 50+ (blocks 98% of harmful UV rays)
Certifications: OEKO-TEX® Standard 100, Bluesign®
Standard Packaging: Paper carton, customizable for bulk shipping
Our air covered yarn manufacturing process uses precision compressed air systems to wrap polyester DTY filaments around the spandex core uniformly, without damaging the elastic core. We implement a 5-step quality control system: raw material incoming inspection, in-line production monitoring of wrapping uniformity, post-production tensile and elasticity testing, batch consistency verification, and pre-shipment compliance checks. This ensures every roll of yarn meets industrial production standards.
High-Performance Activewear: Yoga pants, running shorts, compression tops, and cycling jerseys requiring 360° dynamic stretch and moisture management
Swimwear & Water Sports Apparel: Chlorine-resistant rash guards and swim leggings with stable stretch after repeated water exposure
Medical Compression Textiles: 15–20 mmHg graduated compression stockings and orthopedic braces with controlled, consistent pressure
Intimate Apparel & Shapewear: Supportive bras, panties, and body-shaping garments with all-day comfort and shape retention
For optimal industrial knitting performance, use 28–32 gauge needles, with adjusted tension settings to accommodate the yarn’s elasticity and prevent tight stitching. Store this industrial grade stretch yarn in a dry, well-ventilated warehouse at 15–25°C, with relative humidity of 40–60%. Avoid direct sunlight, high temperature, humidity, and contact with corrosive chemicals to preserve elastic performance.
We offer flexible MOQ options to accommodate both small-batch custom production and large-scale mass manufacturing, with tiered pricing for bulk orders.
Yes. Its uniform air-covered structure minimizes yarn breakage and snagging, making it fully compatible with high-speed warp and weft knitting equipment, reducing production downtime.
Yes. It has a UPF 50+ rating, blocking 98% of harmful UV rays, making it ideal for outdoor activewear production.
Whether you need standard bulk shipments or customized yarn specifications, packaging, and color options, our professional technical and sales team is ready to support your production needs. Contact us today to get your exclusive custom bulk quote, free sample testing, and full technical support for your manufacturing operations.
