Milk pouch

Milk pouches must be made from multi-layer co-extruded films, typically involving LDPE (Low-Density Polyethylene) for sealing and LLDPE for strength. For long-shelf-life (UHT) milk, a barrier layer such as EVOH or Aluminum foil is mandatory to block light and oxygen. Ensure the material is 100% virgin food-grade and free from BPA or recycled contaminants.

Suppliers must provide FDA (US Food and Drug Administration) or EU Food Contact (Regulation No 10/2011) certification. Additionally, look for ISO 22000 or FSSC 22000 (Food Safety Management Systems) and BRCGS (British Retail Consortium) certifications to ensure the manufacturing environment meets global hygiene standards.

Request technical data sheets (TDS) focusing on Tensile Strength, Elongation at Break, and Dart Impact Resistance. The Heat Seal Strength should be tested to ensure it can withstand the pressure of liquid weight during transport. Ask for a Burst Test report to confirm the pouch won't rupture under stacking pressure.

For high-volume orders, Rotogravure printing is recommended as it offers the best color consistency and lowest per-unit cost. Ensure the supplier uses non-benzene and non-ketone inks to prevent chemical migration into the milk. For smaller batches or complex designs, Flexographic printing is a viable, eco-friendly alternative.

The biggest risk is chemical migration from non-compliant materials, which can lead to product recalls. Another risk is sealing failure due to inconsistent film thickness. To mitigate this, always use Made-in-China.com's Secured Trading services and insist on a Pre-Shipment Inspection (PSI) by third parties like SGS or Intertek.

Pricing for milk pouches is heavily tied to global resin prices (PE/PET). Negotiate a formula-based pricing model if you plan for long-term supply. For MOQs, standard printed pouches usually require 30,000 to 50,000 units due to film roll setup costs; however, you can negotiate lower MOQs by opting for digital printing for market testing.

Milk pouches are sensitive to extreme temperatures and UV light. Ensure the shipping container is clean and dry to avoid mold on outer cartons. Specify heavy-duty corrugated export cartons with internal poly-liners. Upon arrival, store them in a cool, dark warehouse to prevent the film from becoming brittle or the ink from fading.

Before bulk production, send your filling machine specifications (e.g., vertical form-fill-seal/VFFS) to the supplier. You must confirm the roll core diameter, unwinding direction, and eye-mark position. It is highly recommended to purchase a sample roll to run a trial on your specific equipment before finalizing the contract.