As a technical staff member at Haomei Aluminum specializing in the R&D and production of container aluminum foil, and drawing on years of practical experience exporting to the EU and North American markets, we understand the core characteristics of golden color coated container aluminium foil from a technical perspective. Gold color coated container aluminum foil product is not simply a surface coloring treatment, but rather a synergistic design of the substrate and coating, balancing safety, formability, and aesthetic value, suitable for diverse applications such as disposable aluminum foil containers and baking molds.
Structurally, gold color coated container aluminium foil adopts a three-layer composite system of “substrate + passivation layer + gold functional coating”.
The substrate is preferably made of 8011 and 3003 aluminum alloys, formed through continuous casting and high-precision rolling processes, ensuring an elongation rate of ≥35%, meeting the needs of container processing such as deep drawing and folding.
The passivation layer uses a chromate-free environmentally friendly process to improve the corrosion resistance of the substrate and the adhesion of the coating, with a peel force controlled above 0.3N/mm.
The gold coating uses a food-grade epoxy resin system, adding nano-level gold powder pigments, and is uniformly applied using a roll coating process, with the thickness precisely controlled at 2-3μm, ensuring consistent gloss while avoiding the risk of coating migration.
The specifications of color coated container aluminum foil are designed to meet the diverse needs of the export market, with thicknesses ranging from 9-30μm. 9-12μm is suitable for lightweight food containers, 15-20μm for baking molds, and 25-30μm for heavy-duty food packaging. Widths can be customized from 200-900mm with tolerances controlled within ±0.1mm, adapting to automated container production lines. All specifications meet EU EN 601/EN 602 standards and US FDA certification, with heavy metal migration levels (lead ≤0.02mg/kg, cadmium ≤0.01mg/kg) far below international limits.
The core characteristics of gold color coated container aluminum foil stem from rigorous process control throughout the entire process. Key performance indicators are as follows:
– Wide temperature adaptability:
High-temperature resistance reaches -40℃ to 260℃, suitable for direct use in ovens and open flame heating. Actual testing shows that the coating does not peel off or produce odor after baking at 250℃ for 30 minutes, and does not become brittle at low temperatures, making it suitable for all scenarios including refrigeration and heating.
– High Thermal Conductivity:
Leveraging the excellent thermal conductivity of the 8011/3003 aluminum alloy substrate, heating efficiency is 15% higher than ordinary coated aluminum foil, and the heating uniformity error is controlled within ±2℃, effectively preventing localized scorching of food.
– Excellent Barrier Properties:
The gold functional coating forms a dense protective layer with oxygen permeability ≤0.5cm³/(m²·24h), effectively blocking air and moisture intrusion and extending food shelf life by 2-3 days.
– Stable Adhesion:
Combined with an environmentally friendly passivation layer process, the coating peel strength is consistently above 0.3N/mm. After container processing such as deep drawing and folding, there is no delamination or powdering, making it suitable for high-speed operation on automated production lines.
Based on practical experience in exporting to the EU, North America, and Southeast Asia, the gold color coated container aluminum foil’s practical advantages are concentrated in three aspects:
– Aesthetic Enhancement:
The aesthetic gold coating has uniform gloss and no color difference or defects, making it suitable for mid-to-high-end catering takeout, baking gift boxes, and other scenarios. In export cases to the Southeast Asian market, this design helped clients enhance brand recognition, increasing product premium by 10%-15%.
– Cost Reduction and Efficiency Advantages:
The synergy between the coating and the aluminum foil substrate has been proven in mass production, controlling container processing breakage rates below 0.8% and maintaining a finished product qualification rate consistently above 99.2%, significantly reducing subsequent production losses for clients.
– Global Compliance:
The product is 100% recyclable, complies with EU EC No 1935/2004 regulations and US FDA certification requirements, and heavy metal migration levels are far below international limits, allowing clients to quickly enter target markets without additional compliance modifications.
Haomei has achieved a triple breakthrough in “safety and compliance, ease of processing, and high added value” through optimized coating formulations and rolling processes, providing customized solutions for global clients that balance technical standards and market demands.
