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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3070
longtai
This 30d/70d spandex nylon SCY (single-covered yarn) is an elastic yarn engineered for hosiery production. It features a dual-layer structure with a 30d spandex core wrapped in a 70d nylon outer layer. The yarn delivers 15–20% controlled stretch under 500g load, which accommodates natural foot movement without overstretching, and maintains 95% recovery rate after 1,000+ stretch cycles. This ensures socks retain their fit through repeated washes and wear.
The single-covered construction provides uniform elasticity distribution, eliminating uneven tightness or sagging in high-stress areas such as heels and toes. The yarn holds OEKO-TEX® Standard 100 Class I certification, meeting safety requirements for direct contact with sensitive skin and making it suitable for products intended for all age groups. It is compatible with most industrial knitting equipment and supports a range of hosiery designs for different commercial procurement needs.
Parameter | Details |
Material Composition | 70% nylon (70d/24F high-tenacity filament) + 30% spandex (30d ultra-fine elastic core) |
Yarn Structure | Single-covered (SCY) with 120–140 turns per meter wrap density |
Elastic Performance | 15–20% stretch under 500g load; 95% recovery after 1,000 stretches |
Abrasion Resistance | Exceeds 30,000 cycles in Martindale testing (ASTM D4966) |
Breaking Strength | 4.0–5.5 cN/dtex |
Moisture Transport Rate | 0.25 g/min |
Available Certifications | OEKO-TEX® Standard 100 (Class I); GRS (Global Recycled Standard) for eco-focused orders |
The yarn offers 360° circumferential stretch that adapts to variations in foot shape, reducing bunching at the toe and slipping at the cuff. Its uniform thickness (±5% tolerance) ensures consistent production output and compatibility with high-speed knitting machines.
The nylon outer layer protects the spandex core from friction damage during wear and chemical exposure from laundry detergents. Compared to uncovered spandex, this yarn extends sock lifespan by 30%. Its breaking strength of 4.0–5.5 cN/dtex reduces yarn breakage during manufacturing, improving production efficiency.
Hydrophilic nylon filaments draw sweat away from the skin to the yarn surface for rapid evaporation. This maintains dryness for up to 8 hours of continuous wear, enhancing end-user comfort.
GRS-certified variants of this yarn use 50% recycled nylon, reducing carbon emissions by 40% compared to virgin nylon production. This option supports businesses aiming to meet environmental sustainability targets in their supply chains.
The yarn’s controlled stretch and recovery make it suitable for running, hiking and cycling socks. Its targeted compression properties help reduce blister formation and foot fatigue during physical activity.
It is used in the production of graduated compression stockings (15–20 mmHg) for venous insufficiency management. The uniform elasticity ensures consistent pressure distribution across the limb, which is critical for medical efficacy.
The yarn enables the production of seamless ankle socks, sheer tights and patterned crew socks. Its elastic cuffs stay in place without causing discomfort, supporting a wide range of fashion hosiery designs.
Yes. Its uniform thickness and consistent elasticity make it compatible with high-speed seamless knitting machines with 30–34 gauge needles.
Store the yarn in cool (15–25°C), dry environments (40–60% relative humidity) away from direct sunlight. Under these conditions, the shelf life is 24 months.
Yes, dope-dyed custom colors are available with a 10-ton minimum order. Dye pigments are infused into the nylon layer during production, retaining 90% vibrancy after 50+ washes (tested according to ISO 105-C06).
Orders have a standard delivery time of 15 days. Free samples are available (excluding freight charges). Accepted payment methods include T/T and L/C. The yarn is packed in cartons for safe transportation. Customized specifications and packaging options are available upon request for large-volume commercial orders.
