Spun polyester yarn 50/2

When purchasing 50/2 spun polyester, you must verify the tensile strength (tenacity), which should typically be ≥ 900cN for high-speed sewing. The twist per meter (TPM) should be consistent to prevent knotting; for 50/2, a range of 800-900 TPM is standard. Additionally, ensure the Uster CV% (evenness) is low (ideally < 11%) to avoid breakage during industrial garment production.

Buyers should prioritize suppliers who hold the OEKO-TEX® Standard 100 certification, ensuring the yarn is free from harmful substances. For environmental claims, look for the Global Recycled Standard (GRS) if you are sourcing recycled polyester. Compliance with ISO 9001 is a baseline requirement to ensure batch-to-batch color consistency and structural integrity.

Spun Polyester 50/2 is a versatile, lightweight thread primarily used for overlocking, high-end shirts, silk-like fabrics, and knitted garments. Its functional advantages include high resistance to abrasion, excellent chemical resistance, and low shrinkage (usually < 1% at 150°C), which ensures seams remain flat after multiple industrial wash cycles.

Request a Lab Dip for color matching and verify that the colorfastness to washing and light meets Grade 4 or higher according to ISO 105 standards. Ensure the supplier uses eco-friendly disperse dyes that do not bleed, especially when the yarn is intended for multi-colored or contrast-stitch garments.

Always request a pre-shipment sample (PSS) from the actual production lot. For large-scale orders, utilize third-party inspection services (like SGS or Intertek) to perform a random cone inspection focusing on weight accuracy, moisture regain (should be 0.4% - 3%), and the presence of oil stains or knots.

Yarn pricing is highly sensitive to raw material (PTA/MEG) market fluctuations. Negotiate based on a formula-based pricing model linked to market indices for transparency. For MOQs, while standard colors may have low requirements, custom-dyed colors usually require at least 50kg to 100kg per color to ensure dyeing vat efficiency.

Specify seaworthy packaging; yarn cones should be individually wrapped in PP bags and packed in 5-layer corrugated cartons or woven bags with internal waterproof liners to prevent moisture absorption and mildew during sea transit. For large volumes, FCL (Full Container Load) is recommended to reduce handling damage compared to LCL.

Use secure payment methods such as Letter of Credit (L/C) for large orders or Trade Assurance services provided by reputable platforms like Made-in-China.com. This ensures that payment is only released upon verification of shipping documents and compliance with the agreed-upon Quality Acceptance Criteria.