Onion bag

Buyers should prioritize High-Density Polyethylene (HDPE) or Polypropylene (PP) for mesh bags due to their high tensile strength and breathability. For long-distance shipping, ensure the mesh density is sufficient to prevent tearing while allowing maximum airflow to prevent sprouting and rot. For retail packaging, tubular Leno mesh is preferred for its aesthetic clarity and durability.

Since these bags come into direct contact with produce, they must meet Food Grade Certification standards. Ensure suppliers comply with FDA (US) or EC 1935/2004 (EU) regulations regarding plastic materials. Additionally, verify that the dyes and colorants used in the mesh are non-toxic and lead-free to avoid chemical migration into the onions.

Request technical data sheets specifying the Safe Working Load (SWL), typically ranging from 5kg to 50kg. Check the sewing method; L-sew or circular woven bottoms offer better reinforcement. For outdoor storage, ensure the material includes UV Stabilization treatment (usually 1% to 3% UV additive) to prevent the plastic from becoming brittle when exposed to sunlight.

Look for suppliers who offer custom printed labels (bands) sewn onto the mesh, which are vital for barcodes, branding, and traceability. Confirm if the supplier can provide drawstring closures (poly-tape or tie strings) to improve packing efficiency. Color customization (typically red, orange, or yellow) is also key to enhancing the visual appeal of the specific onion variety.

The most common risk is material thinning, where the GSM (grams per square meter) is lower than sampled, leading to bag breakage during machine filling. To mitigate this, use Made-in-China.com's Secured Trading services and insist on a pre-shipment inspection (PSI) to verify weight, dimensions, and tensile strength before final payment.

Onion bags are a high-volume, low-margin commodity. Tiered pricing is standard; you can often achieve a 10-15% cost reduction by increasing order volume to full container loads (FCL). Negotiate for free samples but be prepared to cover air express costs. For long-term contracts, lock in prices to hedge against fluctuations in raw plastic resin (PP/PE) costs.

Because mesh bags are lightweight but bulky, they should be bale-packed and compressed to minimize shipping volume. Use FOB (Free On Board) terms to maintain control over freight costs. Ensure the Bill of Lading accurately reflects the 'Food Grade' status to avoid delays during customs clearance and agricultural inspections in the destination country.

Always verify if the supplier is an Audited Supplier on Made-in-China.com, which confirms their manufacturing capabilities and business legitimacy. Use Escrow-based payment terms where funds are only released upon confirmation of shipping documents. Avoid suppliers who refuse to provide third-party lab test reports for UV resistance or food safety.