In the modern packaging industry, 3105 aluminum coil has become widely used in packaging containers for food, beverages, and pharmaceuticals due to its advantages of light weight, aesthetics, corrosion resistance, and recyclability. Especially in the sealing of high-end liquor, wine, and beverage bottles, the importance of aluminum alloy cap materials is increasingly prominent.

Introduction to 3105 Aluminum Alloy

3105 aluminum alloy belongs to the Al-Mn anti-rust aluminum series. It contains small amounts of magnesium, manganese, and copper, offering moderate strength, good corrosion resistance, and excellent workability. Compared to pure aluminum, it provides better mechanical properties while retaining good elongation and printability, making it ideal for bottle cap production processes such as deep drawing, stretching, and curling.

3105 aluminum alloy in tempers such as H14 and H16 is commonly used for bottle cap manufacturing. These tempers provide the necessary hardness for bottle cap applications. The alloy’s outstanding deep drawing performance ensures that caps do not crack during stamping and minimizes "earring" defects, which is essential for improving material utilization and product quality.

Specifications of 3105 Aluminum Alloy for Bottle Caps

Mechanical Properties of 3105 Aluminum Coil (for Bottle Cap Use)

3105 aluminum alloy chemical composition:

Advantages of 3105 Aluminum Coil in Bottle Cap Manufacturing

1. Excellent Formability
3105 aluminum coil has superior ductility, capable of withstanding complex processes such as deep drawing, spinning, and stretching. It is suitable for various cap designs, including long caps, short caps, and aluminum-plastic composite caps, offering high production yield.

2. Outstanding Surface Quality
Smooth surface without oil stains or scratches, suitable for anodizing, printing, coating, and other surface treatments—perfect for high-end packaging aesthetics.

3. Strong Corrosion Resistance
Ideal for long-term exposure to humid or alcohol-rich environments in liquor packaging. Ensures extended service life and secure sealing.

4. Eco-Friendly and Recyclable
Aluminum caps are reusable and environmentally sustainable, meeting global environmental standards, especially for export-oriented liquor packaging companies.

5. Excellent Surface Cleanliness
Easy to apply coatings, printing, or branding treatments. Enhances product appearance and marketing.

6. Cost Efficiency
Compared to alternative cap materials, aluminum caps made with 3105 are typically more economical.

Comparison of Common Aluminum Alloys for Bottle Caps (3105 vs. Others)

As a professional aluminum bottle cap material manufacturer, MC Aluminum specializes in the production of 1060, 3104, 3105, 5052, 8011 and other aluminum for bottle caps, and provides 3105 aluminum coils with different tempering states (such as H14, H16) and surface treatments (such as oiling, chroming, and painting) to meet the specific needs of bottle cap manufacturers. Products are exported overseas with excellent quality, factory direct sales, sample provision, and short delivery time, so customers can order with confidence.