Polythene bag

Choosing the right material is critical for functionality. HDPE (High-Density Polyethylene) is crinkly, strong, and offers excellent tensile strength, making it ideal for grocery bags and trash liners. LDPE (Low-Density Polyethylene) is soft, flexible, and has high clarity, perfect for ziplock bags and food packaging. LLDPE (Linear Low-Density Polyethylene) provides superior puncture resistance and stretchability, often used for industrial liners and heavy-duty shipping sacks.

Buyers must specify the gauge (thickness), typically measured in microns or mils; for heavy-duty use, a thickness of >50 microns is recommended. Ensure the seal strength is tested to prevent bottom-bursting. For automated packaging lines, the COF (Coefficient of Friction) must be controlled to ensure bags open easily and move smoothly through machinery. Additionally, verify if anti-static or UV-stabilizer additives are required for electronic components or outdoor storage.

For food-contact bags, ensure the supplier provides FDA or EU Food Grade (EC 1935/2004) certification. To meet global sustainability trends, look for GRS (Global Recycled Standard) if using recycled content, or EN 13432 if the bags are marketed as compostable. Always request a Heavy Metal Test Report (RoHS) to ensure the pigments and resins are non-toxic, especially for toys or medical packaging.

Professional suppliers on Made-in-China.com typically offer gravure or flexographic printing for branding, supporting up to 8-10 colors. You can customize the closure type (heat seal, slider, adhesive strip, or drawstring) and ventilation (perforated holes for produce). For retail, specify header cards or euro-hole punches for hanging displays.

This is a common risk in bulk plastic trade. Always stipulate a +/- 3% tolerance for thickness and quantity in the contract. Require the supplier to provide a weighing bridge report for the total shipment. For large orders, hire a third-party inspector to perform a Random Sampling Inspection (AQL 2.5/4.0) to verify the actual micron count and bag dimensions before final payment.

Many regions, including the EU (SUP Directive) and parts of the USA and Canada, have strict bans or taxes on certain single-use polythene bags. Before ordering, confirm the HS Code (typically 392321) and check your local customs regulations. If your target market has a plastic ban, ask your supplier for biodegradable (PLA/PBAT) alternatives or bags with >30% Post-Consumer Recycled (PCR) content to avoid heavy import levies.

Polythene bags are dense and heavy. To reduce costs, request vacuum compression packing to minimize volume, or use heavy-duty palletization to prevent damage during sea freight. For maximum economy, source in Full Container Loads (FCL) rather than LCL to avoid high port handling fees. When sourcing from Made-in-China.com, negotiate FOB terms to maintain control over your ocean freight rates and schedules.

Use Secured Payment services provided by reputable platforms to ensure funds are only released after the Bill of Lading (B/L) is uploaded and verified. For first-time orders, avoid 100% T/T upfront; a standard 30% deposit and 70% balance against the copy of B/L is the industry norm for protecting buyer liquidity.