Aluminum cap materials are specially engineered for tamper-evident closures

used on glass bottles and containers. These caps are typically produced from specific aluminum alloys such as 8011-H14 and 3105-H16, with thickness ranging from 0.20 to 0.23 mm. They offer high strength, excellent ductility, and strong corrosion resistance, making them ideal for applications where seal integrity and tamper protection are critical—such as spirits, pharmaceuticals, and beverages.

MC Aluminum manufactures aluminum closure sheets with chromate or DOS surface treatments to enhance corrosion resistance and improve printability.

Material Characteristics & Selection Guide

Common Alloys:

• 8011-H14: Excellent for deep drawing with low earing rate (≤3%), the mainstream material for liquor bottle caps.

• 3003-H16: Notable for superior corrosion resistance, widely used in pharmaceutical closures requiring long-term airtight sealing.

• 3105: Offers strong surface treatment compatibility and paint adhesion, ideal for cosmetic packaging caps.

• 1060 / 1235: High-purity aluminum foils, mainly used for liner seals to ensure leak protection.

Physical Parameters:

• Thickness: 0.20–0.23 mm (tolerance ±0.01 mm); too thin may cause tearing, too thick increases cost.

• Width: 449–796 mm; compatible with automatic production lines.

Product Advantages

1.Superior Formability

Aluminum closure stock (e.g., 8011-H14, 3105-H16) features high elongation and tensile strength, making it ideal for high-speed stamping, deep drawing, and rolling processes used in cap forming.

2.Long-Term Durability & Corrosion Resistance

With anodized or coated surfaces, the material forms a dense protective oxide film, effectively resisting corrosion from air, moisture, alcohol, and pharmaceutical vapors.

3.Wide Compatibility

Compatible with a variety of cap designs including screw caps, ROPP caps, press-twist caps, anti-counterfeit closures, and child-resistant caps.

4.Excellent Decorative Appeal

Supports advanced decoration processes such as color printing, coating, anodizing, electrophoresis, and laser marking, enhancing brand identity.

5.Eco-Friendly & Recyclable

Made from 100% recyclable aluminum, it aligns with global environmental and sustainability standards.

Application Fields

Alcoholic Beverages: Widely used in baijiu and wine bottle caps, accounting for over 50% of China’s aluminum cap usage, with an annual demand exceeding 60,000 tons.

Pharmaceuticals: Designed to withstand high-temperature sterilization, suitable for oral liquid and injection bottle caps.

Beverages & Cosmetics: Used for carbonated drinks (with anti-explosion design) and perfume caps, which require high-precision printing and visual appeal.

Production Quality Control

Mechanical Properties: Tensile strength ranges from 110 to 165 MPa depending on alloy temper; earing rate ≤3% in cup drawing tests.

Surface Requirements: Free from cracks and corrosion; slight scratches allowed; coil telescoping ≤5 mm.

Thickness Control: Maintained within ±0.02 mm for consistent cap structure and sealing performance.