Spandex fabric

When evaluating Spandex fabric, the most critical factor is the composition ratio, typically ranging from 5% to 30% depending on the desired elasticity. You must verify the GSM (Grams per Square Meter) to ensure the fabric weight matches your application (e.g., 160-220 GSM for leggings). Additionally, check the four-way stretch recovery rate; high-quality Spandex should return to its original shape without 'bagging' after being stretched to at least 500% of its length.

For global markets, ensure the supplier holds an OEKO-TEX® Standard 100 certification, which guarantees the fabric is free from harmful chemicals. If you are targeting the EU, compliance with REACH regulations is essential. For eco-friendly lines, look for the Global Recycled Standard (GRS) if the Spandex is blended with recycled polyester or nylon.

Request a third-party lab test report focusing on colorfastness to washing and perspiration (Grade 4 or higher). Conduct a pilling resistance test (ASTM D3512) to ensure the surface remains smooth. For swimwear or outdoor gear, specifically ask for UV protection ratings (UPF 50+) and chlorine resistance levels to prevent premature fiber degradation.

Spandex is rarely used alone; it is usually blended. Nylon-Spandex blends are ideal for swimwear and high-compression activewear due to their smooth hand-feel and durability. Cotton-Spandex blends are preferred for casual apparel and underwear to provide breathability with added comfort. For industrial use, Spandex is integrated into medical bandages and automotive interiors.

Color variance between different production batches (shading) is a common risk. You should mandate that the supplier provides Lab Dips for approval before production and uses spectrophotometer testing to ensure the Delta E value is less than 1.0. Always request that the entire order be produced from the same dye lot.

Focus on tiered pricing based on volume; for Spandex, a price break often occurs at 1,000kg or 3,000 yards. Negotiate for free pre-production samples (PPS) and insist on Trade Assurance or secure payment terms that link final payment to a successful pre-shipment inspection (PSI).

Spandex is sensitive to heat and pressure. Ensure rolls are wrapped in double-layer plastic film to prevent moisture ingress and 'flat spots' on the fabric. Specify that containers must be kept away from heat sources during transit, as excessive heat can permanently damage the elastic fibers (heat setting issues).

Verify the HS Code (typically 5402.44 or 5404.11) to determine the exact import duties in your country. Check for any anti-dumping duties currently applied to synthetic fibers from the origin country. Utilize professional platforms like Made-in-China.com to find suppliers who provide complete Certificates of Origin (CO) to help you benefit from preferential tariff rates under Free Trade Agreements.