Aluminum Sealing Sheet for Bottle Closure

Market of aluminium closures for bottle

Aluminum bottle caps have become the mainstream choice in the packaging industry due to their lightweight, corrosion resistance, and easy processing. Its application scenarios cover three major areas:

Beverages and food: There are pull ring caps for carbonated beverages (such as Coca-Cola and Pepsi), crown caps for beer, screw caps for edible oil, etc., and the world consumes more than 50 billion aluminum beverage bottle caps each year.

Medicine and cosmetics: Aluminum-plastic combination caps for antibiotic bottles and vacuum screw caps for skin care products require materials that comply with FDA and EU food contact standards (such as EC No 1935/2004).

Industry and special fields: Leak-proof caps for pesticide bottles and safety caps for high-pressure gas cylinders must meet high pressure resistance (such as 650kPa instantaneous pressure resistance test) and impact resistance.

Market data shows that the global aluminum bottle cap market will reach US$6.058 billion in 2023 and is expected to increase to US$7.741 billion in 2030, with a compound annual growth rate of 3.5%. As the largest single market, China will account for 25% of the global market share in 2025, with an annual growth rate of more than 8%.

Core performance requirements of aluminum closure sheet

The aluminum sealing sheet must meet functionality, processability and environmental protection at the same time. The following are key indicators:

Corrosion resistance

Chemical stability: It needs to pass the 10% citric acid solution immersion test (ISO 2215) to ensure that there is no metal ion precipitation in contact with beverages.

Surface treatment: Use anodizing (film thickness ≥5μm) or organic coating (such as polyester coating) to prevent oxidation and liquid penetration.

Forming processability

Elongation: 8011-H14 alloy has an elongation of ≥6%, suitable for deep drawing; 5052-H24 alloy has a tensile strength of 230-280MPa, suitable for high-pressure bottle caps.

Plate type accuracy: thickness tolerance ±0.01mm, wave degree ≤3mm/m, to ensure no wrinkles during stamping.

Sealing and opening performance

Gasket bonding strength: The gasket does not fall off after boiling in boiling water for 10 minutes or freezing at -10℃ for 24 hours (T/CBJ 3305-2024).

Opening torque: The first step opening force is 10-30N, and the second step is ≤38N, balancing sealing and user experience.

Environmental protection and sustainability

Recyclability: The aluminum recycling rate is over 70%, and the energy consumption of recycled aluminum is only 5% of that of original aluminum.

Lightweight design: For example, Toyo Can's 6.1g ultra-light aluminum can reduces material usage by 13% and carbon emissions by 8%.

Haomei Aluminum provides different types of aluminum sheet and aluminum coil for closure. Welcome to inquire what you need from us directly.

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