The can lid is made of specially formulated aluminum-magnesium alloy 5182 (4.5% magnesium). After the pull ring structure was optimized through finite element analysis, the opening pulling force was reduced to 9.5N±0.8 (the old design required 15N). The forming process of the metal cover undergoes 18 procedures. The thickness gradient ranges from 0.23mm in the center to 0.16mm at the edge (dimension Φ54mm±0.05), and the fracture strength test reaches 2,050N (exceeding the ISO standard by 27%). Data from the production line of Crown Holdings shows that the production rate of fully BPA-free easy-pull LIDS reaches 3,200 per minute, and the failure rate of opening is reduced to 0.007%.
The bottom structure reinforcement component of the tank applies special steel rings. Tin-plated steel strips (CTES 0.8T) with a thickness of 0.15mm are embedded at the bottom of 250ml can, and the compressive strength is increased to 245N (the limit of bare aluminum tanks is 210N). Experiments conducted by Toyo Can-making in Japan have confirmed that this structure increases the drop impact tolerance height from 1.8 meters to 2.5 meters and reduces the axial pressure deformation by 42%. In terms of sustainability, the compact size design enables a material utilization rate of 97.8%, and the stamping waste rate is only 2.2% (the waste rate of large tank production is 7%).
The water-based ink and the outer layer of varnish are used to present the brand. A six-color offset printing (with a resolution of 2,400dpi) is adopted to superimposed a UV curing coating (with a thickness of 5μm). The color durability reaches 1,200 hours of QUV accelerated aging test (equivalent to 3 years of outdoor exposure), and the color difference ΔE is ≤1.5 (Pantone certification standard). Amcor printing production line verification: The drying speed of the new varnish formula has been accelerated to 0.8 seconds (the original process was 2.5 seconds), and the production speed has been increased to 1,100 cans per minute (with an error of ±5 cans).
This material system is driving evolution: Test tanks with aluminum thinned to 0.12mm (each tank weighing 10.1g) are being tested, bio-based coatings reduce the proportion of petroleum raw materials by 48%, and laser engraving replaces ink to save printing costs by 35%. When the recycling rate of aluminium reaches 78% (data from the European Aluminium Institute in 2024), the implied energy cost of each 250ml can is only 5.7% of that of primary aluminium cans, confirming the sustainable revolution from mineral resources to the closed-loop system of recycling and regeneration.
What materials are used to make a 250ml can?
Aluminum-magnesium alloy constitutes the core base material of the tank. The typical composition ratio is 94.5%-97.5% of aluminum (grade 3104 or 5042), 2.0%-3.0% of magnesium, and 0.8%-1.3% of manganese. The technical documents of Ball Corporation show that the thickness of the aluminum alloy used for 250ml can has been reduced from 0.20mm of the standard 330ml can to 0.16mm, and the material usage has decreased by 24% (the mass of a single can is 11.8g±0.2g). After cold rolling hardening treatment (H19 state), the tensile strength reaches 280-310 mpa, capable of withstanding filling internal pressure of 3.8 bar (approximately 55psi) and stacking load at a height of 9.2 meters (ISO certification test). Coca-Cola supply chain data confirm that this material combination reduces the carbon footprint to 148g CO₂e per can (38% lower than traditional cans), and the energy consumption in the recycling and regeneration process is only 4.1MJ/kg (42MJ/kg is required for primary aluminum production).
The epoxy-acrylic composite coating is used to establish the key protective layer. The thickness of the inner wall coating is controlled at 12μm±0.5 (FDA 21 CFR 175.300 standard), and a micron-level barrier is formed after baking at 176℃ for 90 seconds and curing. The SGS test report from Switzerland shows that this coating can prevent the migration of bisphenol A (detection amount <0.01ppb), has an acid resistance of pH 2.5 (typical value for carbonated beverages), and has an anti-corrosion lifespan of over 18 months. After the technological upgrade of Anheuser-Busch InBev in 2023, the amount of coating material used per square meter was reduced to 5.8g (the industry average was 7.2g), saving 18% of costs while achieving recyclable compatibility.
The can lid is made of specially formulated aluminum-magnesium alloy 5182 (4.5% magnesium). After the pull ring structure was optimized through finite element analysis, the opening pulling force was reduced to 9.5N±0.8 (the old design required 15N). The forming process of the metal cover undergoes 18 procedures. The thickness gradient ranges from 0.23mm in the center to 0.16mm at the edge (dimension Φ54mm±0.05), and the fracture strength test reaches 2,050N (exceeding the ISO standard by 27%). Data from the production line of Crown Holdings shows that the production rate of fully BPA-free easy-pull LIDS reaches 3,200 per minute, and the failure rate of opening is reduced to 0.007%.
The bottom structure reinforcement component of the tank applies special steel rings. Tin-plated steel strips (CTES 0.8T) with a thickness of 0.15mm are embedded at the bottom of 250ml can, and the compressive strength is increased to 245N (the limit of bare aluminum tanks is 210N). Experiments conducted by Toyo Can-making in Japan have confirmed that this structure increases the drop impact tolerance height from 1.8 meters to 2.5 meters and reduces the axial pressure deformation by 42%. In terms of sustainability, the compact size design enables a material utilization rate of 97.8%, and the stamping waste rate is only 2.2% (the waste rate of large tank production is 7%).
The water-based ink and the outer layer of varnish are used to present the brand. A six-color offset printing (with a resolution of 2,400dpi) is adopted to superimposed a UV curing coating (with a thickness of 5μm). The color durability reaches 1,200 hours of QUV accelerated aging test (equivalent to 3 years of outdoor exposure), and the color difference ΔE is ≤1.5 (Pantone certification standard). Amcor printing production line verification: The drying speed of the new varnish formula has been accelerated to 0.8 seconds (the original process was 2.5 seconds), and the production speed has been increased to 1,100 cans per minute (with an error of ±5 cans).
This material system is driving evolution: Test tanks with aluminum thinned to 0.12mm (each tank weighing 10.1g) are being tested, bio-based coatings reduce the proportion of petroleum raw materials by 48%, and laser engraving replaces ink to save printing costs by 35%. When the recycling rate of aluminium reaches 78% (data from the European Aluminium Institute in 2024), the implied energy cost of each 250ml can is only 5.7% of that of primary aluminium cans, confirming the sustainable revolution from mineral resources to the closed-loop system of recycling and regeneration.
The can lid is made of specially formulated aluminum-magnesium alloy 5182 (4.5% magnesium). After the pull ring structure was optimized through finite element analysis, the opening pulling force was reduced to 9.5N±0.8 (the old design required 15N). The forming process of the metal cover undergoes 18 procedures. The thickness gradient ranges from 0.23mm in the center to 0.16mm at the edge (dimension Φ54mm±0.05), and the fracture strength test reaches 2,050N (exceeding the ISO standard by 27%). Data from the production line of Crown Holdings shows that the production rate of fully BPA-free easy-pull LIDS reaches 3,200 per minute, and the failure rate of opening is reduced to 0.007%.
The bottom structure reinforcement component of the tank applies special steel rings. Tin-plated steel strips (CTES 0.8T) with a thickness of 0.15mm are embedded at the bottom of 250ml can, and the compressive strength is increased to 245N (the limit of bare aluminum tanks is 210N). Experiments conducted by Toyo Can-making in Japan have confirmed that this structure increases the drop impact tolerance height from 1.8 meters to 2.5 meters and reduces the axial pressure deformation by 42%. In terms of sustainability, the compact size design enables a material utilization rate of 97.8%, and the stamping waste rate is only 2.2% (the waste rate of large tank production is 7%).
The water-based ink and the outer layer of varnish are used to present the brand. A six-color offset printing (with a resolution of 2,400dpi) is adopted to superimposed a UV curing coating (with a thickness of 5μm). The color durability reaches 1,200 hours of QUV accelerated aging test (equivalent to 3 years of outdoor exposure), and the color difference ΔE is ≤1.5 (Pantone certification standard). Amcor printing production line verification: The drying speed of the new varnish formula has been accelerated to 0.8 seconds (the original process was 2.5 seconds), and the production speed has been increased to 1,100 cans per minute (with an error of ±5 cans).
This material system is driving evolution: Test tanks with aluminum thinned to 0.12mm (each tank weighing 10.1g) are being tested, bio-based coatings reduce the proportion of petroleum raw materials by 48%, and laser engraving replaces ink to save printing costs by 35%. When the recycling rate of aluminium reaches 78% (data from the European Aluminium Institute in 2024), the implied energy cost of each 250ml can is only 5.7% of that of primary aluminium cans, confirming the sustainable revolution from mineral resources to the closed-loop system of recycling and regeneration.