Spandex yarn

When evaluating Spandex yarn, the most critical factor is the Denier (D) or Decitex (dtex), which determines the thickness and elasticity. For lightweight fabrics like hosiery, 20D-40D is standard, while heavy-duty shapewear may require 70D-140D. You must also verify the Elongation Percentage (typically 400%-700%) and Elastic Recovery Rate to ensure the yarn returns to its original shape after stretching. Additionally, check the Luster (Clear, Dull, or Bright) to match your fabric's aesthetic requirements.

To ensure safety and market access, prioritize suppliers with OEKO-TEX® Standard 100 certification, which guarantees the yarn is free from harmful chemicals. For sustainable product lines, look for the Global Recycled Standard (GRS) if sourcing recycled spandex. Furthermore, ensure the manufacturer follows ISO 9001 for quality management and ISO 14001 for environmental standards to mitigate supply chain risks.

Spandex is rarely used alone; it is usually Covered (Single or Double), Core-spun, or Intermingled with other fibers like polyester, nylon, or cotton. Single Covered Yarn (SCY) is ideal for sheer hosiery, while Air-Intermingled Yarn (ACY) is more cost-effective for circular knitting. Understanding the Draft Ratio used during the covering process is vital, as it directly impacts the final fabric's shrinkage and stretch tension.

Spandex is sensitive to environmental factors. It should be stored in a cool, dry place (temperature <25°C, humidity 45-75%) away from direct sunlight and heat sources. Most high-quality spandex has a shelf life of 6 to 12 months; beyond this, the yarn may suffer from oxidation, yellowing, or loss of elasticity, which can lead to breakage during high-speed knitting or weaving.

Always request a Pre-Shipment Inspection (PSI) and a Lab Test Report from a third party like SGS or Intertek. Specifically, ask for a Breaking Strength Test and Oil Content Analysis (silicone oil levels should be consistent to prevent dyeing streaks). Using Made-in-China.com’s Secured Trading services can provide an extra layer of protection by ensuring payment is only released after quality verification.

Spandex prices are highly sensitive to the cost of raw materials like PTMEG and MDI. It is wise to negotiate a Formula-Based Pricing model for long-term contracts. For MOQ, while large factories prefer 1-ton minimums, you can negotiate Trial Orders of 100kg-500kg by paying a small premium. Consolidating different deniers into one shipment can also help meet volume requirements while reducing Unit Freight Costs.

Spandex is heavy and sensitive to pressure. Ensure the supplier uses Standard Export Palletization with Plastic Shrink Wrap to prevent moisture ingress and carton deformation. For long-haul sea freight, request Desiccants inside the containers. To optimize logistics to your specific country, compare FOB vs. CIF terms; often, FOB allows you better control over the Demurrage and Detention periods at the destination port.

Verify the supplier's Business License and Export Qualification on Made-in-China.com. Use Letters of Credit (L/C) or Telegraphic Transfer (T/T) with a deposit and balance against the Bill of Lading (B/L). Be aware of Anti-Dumping Duties that some countries (like India or Brazil) may impose on spandex originating from specific regions to avoid unexpected customs costs.