30d/70d Spandex Nylon SCY for Socks

Product Overview

Our 30d/70d Spandex Nylon SCY for Socks is a high-performance elastic yarn engineered to elevate modern hosiery comfort and durability. This innovative yarn features a dual-layer structure: a 30d spandex core that delivers exceptional stretch, wrapped in a 70d nylon outer layer that enhances softness and abrasion resistance. It achieves 15–20% controlled stretch—enough to accommodate foot movement without overstretching—and maintains 95% recovery rate after 1,000+ cycles, ensuring socks retain their snug fit wash after wash. The single-covered yarn (SCY) construction ensures uniform elasticity distribution, eliminating uneven tightness or sagging in critical areas like the heel and toe. With OEKO-TEX® Standard 100 certification (Class I), it meets the strictest safety standards for direct contact with sensitive skin, making it suitable for all age groups.

Product Specifications

Material Composition: 70% nylon (70d/24F high-tenacity filament) + 30% spandex (30d ultra-fine elastic core)

Yarn Structure: Single-covered (SCY) with uniform wrap density (120–140 turns/meter)

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 (resistant to tearing during high-stress movement)

Moisture Transport Rate: 0.25 g/min (nylon outer layer wicks moisture efficiently)

Certifications: OEKO-TEX® Standard 100 (Class I), GRS (Global Recycled Standard) available for eco-focused orders

Product Features

Dynamic Fit Technology: 360° circumferential stretch adapts to foot shape variations, reducing bunching at the toe and slipping at the cuff—critical for active wear.

Enhanced Durability: Nylon outer layer protects the spandex core from friction and chemical damage (e.g., laundry detergents), extending sock lifespan by 30% vs. uncovered spandex.

Moisture Management: Hydrophilic nylon filaments draw sweat away from skin to the yarn surface for rapid evaporation, keeping feet dry during 8+ hours of wear.

Sustainable Options: GRS-certified variants use 50% recycled nylon, reducing carbon emissions by 40% compared to virgin nylon production.

Applications

Athletic Socks: Ideal for running, hiking, and cycling socks where targeted compression and movement support prevent blisters and fatigue.

Medical Textiles: Used in graduated compression stockings (15–20 mmHg) for venous insufficiency, as its controlled stretch ensures consistent pressure distribution.

Fashion Hosiery: Enables trendy designs like seamless ankle socks, sheer tights, and patterned crew socks with elastic cuffs that stay in place.

FAQ

Q: Can this yarn be used for seamless sock production?

A: Yes. Its uniform thickness (±5% tolerance) and consistent elasticity make it compatible with high-speed seamless knitting machines (30–34 gauge).

Q: What is the recommended storage condition to maintain elasticity?

A: Store in cool (15–25°C), dry environments (40–60% relative humidity) away from direct sunlight; shelf life is 24 months under proper conditions.

Q: Are custom colors available, and how do they perform over time?

A: Yes. We offer dope-dyed custom colors with a 10-ton minimum order. Dye pigments are infused into the nylon layer during production, retaining 90% vibrancy after 50+ washes (ISO 105-C06).