Aluminium foil for container

Buyers must focus on Alloy Grade, typically 3003 or 8011, which provides the necessary strength and elongation for deep drawing. The Thickness usually ranges from 0.03mm to 0.20mm depending on the container depth. Additionally, ensure the foil has a DC (Direct Casting) or CC (Continuous Casting) quality; DC material is generally preferred for high-quality containers due to its superior tensile strength and elongation properties.

It is mandatory to verify that the supplier holds FDA (U.S. Food and Drug Administration) or EU Food Contact (EC 1935/2004) certifications. The foil must be BPA-free and meet ISO 9001 quality management standards. Request a Heavy Metal Migration Test Report to ensure the material is safe for direct contact with acidic or salty foods at high temperatures.

For smooth processing, the foil should be Lubricated (Oiled) with food-grade oil (such as DOS or vegetable oil) to reduce friction during the stamping process and prevent tearing. You should also specify the Surface Finish, ensuring it is bright on one side and matte on the other (or bright both sides), and strictly free from oil spots, pinholes, and roll marks which can lead to container leakage.

For deep-drawn containers, the Elongation rate should ideally be ≥15% to 20%, and the Tensile Strength should be between 80-120 MPa. This ensures the foil can withstand the pressure of the mold without cracking at the corners. Always request a Mill Test Certificate (MTC) to verify these mechanical parameters before shipment.

Aluminium is highly sensitive to moisture. Ensure the supplier uses Seaworthy Export Packaging, which includes plastic film wrapping, desiccant silica gel packets, and reinforced wooden cases. Specify that the rolls must be suspended (horizontal) in the crate to avoid flat spots and ensure the edges are protected with hardboard or plastic end-caps.

Aluminium prices are tied to the LME (London Metal Exchange) or SMM (Shanghai Metals Market). Instead of a fixed price, negotiate a 'Fabrication Cost + Aluminum Ingot Price' formula. This transparency protects both parties from market volatility. For bulk orders, aim for a 3-5% discount on the fabrication fee when ordering over 20 tons (a full 20ft container).

Prioritize 'Audited Suppliers' who have undergone on-site inspections by third-party agencies like SGS or Intertek. Check their Export Experience specifically to your target country to ensure they understand local customs requirements. Use the Secured Trading Service on Made-in-China.com to protect your payment until the goods are confirmed as shipped.

Be aware of Anti-dumping Duties (AD) and Countervailing Duties (CVD) that some countries (like the US or EU) impose on Chinese aluminium products. Always check the HS Code (typically 7607.11) against your local tariff schedule. Ensure the Net Weight and Gross Weight are accurately declared on the Bill of Lading to avoid customs delays and additional port storage fees.