Parcel bags

B2B buyers should prioritize Co-extruded Polyethylene (PE), which offers superior tear resistance and opacity. For standard shipping, a thickness of 60-75 microns (2.4-3.0 mil) is recommended to prevent punctures. If sustainability is a brand priority, look for GRS-certified (Global Recycled Standard) materials or 100% biodegradable PLA+PBAT compositions that meet EN 13432 standards.

Ensure the bags feature a permanent hot-melt adhesive strip with a 'void' or destructive seal; once closed, the bag should require cutting to open. Additionally, verify that the bags have a black or grey inner lining to ensure 100% opacity, preventing unauthorized viewing of the contents during transit.

Look for bags with an anti-static release liner on the adhesive strip, which prevents the film from sticking to the packer's hands, significantly increasing packing speed. For heavy items, specify wide-side heat seals (explosion-proof edges) to prevent the bag from bursting under pressure.

Suppliers should provide RoHS and REACH certificates to ensure the plasticizers and inks used are free from hazardous substances. For bags intended for the US market, ensure compliance with TPCH (Toxics in Packaging Clearinghouse) regulations regarding heavy metal content in packaging.

This is a common industry risk. Always request a pre-shipment sample and specify the net weight per 1,000 bags in the contract. During inspection, use a digital micrometer to verify thickness at multiple points. On Made-in-China.com, prioritize Audited Suppliers whose production capabilities have been verified by third parties like SGS or TÜV Rheinland.

Pricing for parcel bags is highly sensitive to raw polymer resin market prices. Negotiate based on total weight of the order rather than just unit price. For large volumes (e.g., >100,000 units), ask for a tiered pricing structure and inquire if the supplier offers warehousing services for staggered shipments to lock in lower material costs.

Parcel bags are relatively heavy but compact. To optimize costs, use Sea Freight (LCL or FCL) rather than air. Ensure the supplier uses heavy-duty 5-layer corrugated export cartons and palletizes the load with stretch wrap to prevent moisture ingress during long-haul ocean transit, which can degrade the adhesive strips.

Utilize Secured Trading services provided by Made-in-China.com to ensure payments are only released after you confirm receipt and quality. Always include a detailed Quality Assurance Agreement (QAA) in your purchase order that defines 'major defects' (e.g., adhesive failure) and 'minor defects' (e.g., slight color deviation).