Pp woven tubular fabric

Selecting the correct GSM (Grams per Square Meter) and mesh count is vital for structural integrity. For standard packaging like flour or sugar, a GSM of 60-80 is typical. For heavy-duty applications like sandbags or chemicals, aim for 90-120 GSM. Ensure the weave density (e.g., 10x10 or 12x12 threads per inch) matches the particle size of your contents to prevent leakage or 'sifting'.

Since PP (Polypropylene) degrades under sunlight, you must specify the UV stabilizer percentage (typically 1% to 3%) if the fabric will be exposed to outdoors. Request a tensile strength report (Newton/5cm) for both warp and weft directions to ensure the tubular fabric can withstand the pressure of filling and stacking without bursting.

If the fabric is used for food packaging, it must be produced from 100% virgin PP resin. Verify compliance with FDA (US) or EC 1935/2004 (EU) regulations. Ensure the supplier holds ISO 9001 for quality management and HACCP or BRC certifications if the fabric is intended for direct food contact.

For moisture-sensitive goods, BOPP lamination or internal PE coating is required. Check the lamination thickness (usually 15-25 microns) and perform a peel strength test to ensure the coating does not delaminate. The surface should be smooth to allow for high-quality flexographic or gravure printing.

Recycled material reduces cost but significantly lowers tensile strength and UV resistance. To prevent this, include a clause in the contract specifying '100% Virgin Material' and request a third-party lab test (like SGS or Intertek) to verify the ash content and mechanical properties before the final payment.

PP prices are highly sensitive to crude oil market fluctuations. Negotiate a formula-based pricing model linked to global PP resin indices. Additionally, since this is a high-volume, low-margin product, focus on reducing 'Total Landed Cost' by optimizing container loading (e.g., palletized vs. loose bundling) to maximize the 40HQ container capacity.

PP woven rolls are bulky. Use FOB (Free On Board) terms to maintain control over freight costs. Ensure the rolls are wrapped in protective stretch film and have sturdy inner paper cores to prevent crushing during sea transit. For high-humidity routes, specify the use of desiccants in the container to prevent mold on the fabric surface.

Always verify the supplier's Business License and Export Qualification. Use secure payment methods like Letters of Credit (L/C) for large volumes or Trade Assurance services on Made-in-China.com to protect your funds until the Bill of Lading is confirmed. Conduct a factory audit (virtual or physical) to check their circular loom capacity and QC processes.