Woven plastic bags

Buyers must focus on GSM (Grams per Square Meter), which determines the fabric thickness and strength; typically, 60-120 GSM is standard for industrial use. Additionally, verify the denier (yarn fineness) and mesh count (e.g., 10x10 or 12x12) to ensure weave density. For products sensitive to moisture, specify PE inner liners or lamination (BOPP coating) to provide a waterproof barrier.

Ensure the supplier holds ISO 9001 for quality management. If the bags are for food contact (e.g., flour, rice), they must comply with FDA (US) or EC 1935/2004 (EU) regulations. For hazardous materials, look for UN Certification for dangerous goods packaging. Always request a COA (Certificate of Analysis) for the raw polypropylene resin used.

Evaluate the supplier's printing capabilities, such as flexographic printing for simple logos or rotogravure (BOPP) for high-definition, multi-color graphics. Functional customizations include UV stabilization (essential if bags are stored outdoors to prevent sun degradation), anti-slip weaving, and gusseted sides for better pallet stacking.

Request tensile strength test reports for both the fabric and the seams. A high-quality bag should have a Safety Factor (SF) of at least 5:1 for single-trip use. Conduct a drop test (typically from 1.2 to 2 meters) with the intended weight capacity (e.g., 25kg or 50kg) to ensure the bottom stitching does not burst under pressure.

The biggest risk is material adulteration, where suppliers add excessive calcium carbonate filler to reduce costs, making the bags brittle. To mitigate this, use Made-in-China.com's Secured Trading services and insist on third-party inspections (like SGS or Intertek) before the final balance payment to verify material purity and weight.

Pricing for PP woven bags is highly sensitive to global polypropylene resin market prices. Negotiate a formula-based pricing model for long-term contracts. For MOQs, standard factories usually require 10,000 to 30,000 pieces per size; however, you can negotiate lower MOQs by choosing standard white bags without custom printing for your initial trial order.

Woven bags are lightweight but bulky. To optimize shipping costs, ensure the supplier uses hydraulic baling presses to compress the bags into tight bales, maximizing container utilization. Verify that the HS Code (typically 630533) is correctly declared to avoid customs delays or incorrect duty applications in your destination country.

Prioritize Audited Suppliers on Made-in-China.com, as these manufacturers have undergone rigorous on-site verification of their production facilities. Always use Escrow-based payment terms or Letters of Credit (L/C) for large-scale industrial orders to ensure funds are only released upon proof of shipment and quality compliance.