3105 aluminum sheet belongs to the 3xxx aluminum-manganese (Al-Mn) alloy series. By adding a small amount of Mn and Mg on the basis of pure aluminum, it features lightweight properties, excellent corrosion resistance, and good formability. Therefore, it is widely used in the production of wine closures, beverage bottle caps, cosmetic lids, and pharmaceutical caps.

Compared with traditional plastic caps, aluminum closures made from 3105 sheet offer better sealing performance, no leakage, lower oxygen permeability, and reduced water vapor transmission. In addition, 3105 aluminum closure sheet is suitable for printing and coating, ensuring clear and precise patterns for enhanced brand recognition.

Why Choose 3105 Aluminum Sheet for Cap Manufacturing?

1. Excellent Formability and Deep Drawing Performance

3105 aluminum sheet has outstanding deep drawing properties. Its strength, elongation, and processing ability can fully meet the high requirements of automated bottle cap production. During stamping, it resists wrinkling and cracking, ensuring high production efficiency and consistent product quality.

2. Superior Surface Quality

3105 aluminum closure sheet has a smooth and flat surface without roll marks, oil stains, or scratches, making it ideal for post-processing such as printing, embossing, and anodizing. This ensures clear patterns and sharp brand logos, which are critical for product marketing.

3. Strong Anti-Rust and Corrosion Resistance

As a member of the anti-rust aluminum series, 3105 aluminum sheet provides excellent resistance to moisture, oxidation, and acidic beverages. With a tensile strength of up to 210 MPa, it ensures packaging integrity throughout the product’s shelf life.

4. Lightweight and Environmentally Friendly

Aluminum is significantly lighter than other metals, helping reduce transportation costs. More importantly, aluminum is infinitely recyclable without losing quality, making 3105 closure sheet a sustainable material aligned with today’s green packaging trends.

Specifications of 3105 Aluminum Closure Sheet

Applications of 3105 Aluminum Sheet in Cap Manufacturing

3105 aluminum sheet is widely used in different closure types, including:

• Wine Closures (e.g., spirits caps, beer bottle caps)

• Beverage Caps

• Cosmetic Lids

• Pharmaceutical Caps