In the modern cap manufacturing industry, the demand for packaging safety and environmental sustainability has elevated aluminum cap materials to mainstream status. Among them, 3105 aluminum closure sheet coil stands out due to its excellent formability, corrosion resistance, and compatibility with high-speed production, making it a superior alternative to plastic closures. Particularly in the alcoholic beverage sector, 3105 aluminum alloy has become one of the preferred materials for bottle caps.

MC Aluminum offers PP cap aluminum sheets in thicknesses from 0.1mm to 0.9mm, with customizable widths from 500mm to 2000mm, perfectly compatible with automated high-speed stamping lines. Both glossy and matte coatings are available, and the surface can be customized with laser anti-counterfeit codes and precision logo printing for brand protection and premium presentation.

3105 Aluminum Coil Meets Demands of Bottle Cap Processing

The 3105 aluminum coil belongs to the 3000-series Al-Mn alloy, well-known for its excellent rust resistance and deep-drawing properties. With good mechanical strength, elongation, and formability, it is suitable for high-strength automatic cap manufacturing processes-without cracking or wrinkling during production.

The sheet comes with excellent flatness, free of roll marks and oil stains, making it ideal for post-printing processes, delivering clear and vivid decorative patterns.

Product Specifications – 3105 Aluminum Closure Sheet Coil

Key Features of 3105 Aluminum Closure Sheet

1. High Strength:
With added manganese and magnesium, 3105 aluminum achieves higher mechanical strength, making it ideal for high-pressure carbonated beverage caps. It maintains structural integrity during transportation, storage, and opening.

2. Superior Deep Drawing Capability:
Small bending radius during cold forming enables processing of complex cap structures. No cracking, wrinkling, or edge breakage occurs during deep drawing operations.

3. Excellent Corrosion Resistance:
Forms a dense oxide film on the surface, protecting the cap from corrosion while maintaining appearance and sealing integrity.

4. Outstanding Coating and Printing Performance:
The smooth surface of 3105 aluminum allows for advanced pretreatment processes such as chromating and DOS oil coating. It supports various paint systems (gold, white, black, etc.) with vibrant and durable finishes.

5. Lightweight and Eco-Friendly:
As a lightweight material, aluminum reduces overall packaging weight and transport costs. It is also 100% recyclable, with low energy consumption during the recycling process-aligned with global sustainability goals.

6. Food-Grade Safety Compliance:
Conforms to international food contact safety certifications such as FDA and EN602, making it suitable for water bottle caps, condiment packaging, and pharmaceutical containers.

Applications of 3105 Aluminum Closure Material

1. High-Carbonated Beverage Caps

Designed to withstand internal pressures of ≥6 bar, 3105 in H16 temper outperforms 8011 alloy in strength, preventing deformation and gas leakage.

2. Alcoholic Beverage ROPP Caps

Excellent formability ensures precise thread formation and compatibility with tamper-evident designs and foil liners (e.g., 8011-H16).

3. Pharmaceutical / Cosmetic Closures

High chemical resistance makes it ideal for containers of medicine and skincare liquids. Surface can be treated with PVDF or polyester coatings for enhanced aesthetics and durability.

4. Food Can Lids

Used in sauces and edible oil cans, where oxidation resistance is crucial for prolonging shelf life and preserving flavor.

MC Aluminum is an experienced manufacturer of aluminum bottle caps. The main products of bottle cap aluminum plates are 1 series, 3 series, and 8 series aluminum alloy plates. Among them, 1060 aluminum coil, 3104 aluminum coil, 3105 aluminum coil, 5052 aluminum strip, 8011 aluminum foil, etc. are adopted by major manufacturers and widely used in the bottle cap packaging fields of wine, beverages, cosmetics, etc. The bottle cap aluminum plates produced by our company are well-made, delivered on time, and exported to many overseas countries. We provide samples and preferential prices. Please feel free to consult.