Metal caps are an essential component of the packaging industry, widely used in food, beverage, pharmaceutical, and cosmetic sectors. As the preferred material for metal cap manufacturing, aluminum closure sheets are a type of deep-drawn aluminum alloy sheet formed through a high-deformation stamping process (deep drawing), providing excellent forming performance and mechanical strength.

Aluminum bottle cap material not only has good deep drawing forming performance and low anisotropy but also maintains a certain baking strength after multiple color printing and curing processes.

Introduction to Aluminum Closure Sheet Alloys

• 8011 Aluminum Alloy: Mainly composed of aluminum, iron, and silicon, it has excellent moisture resistance, oxidation resistance, and corrosion resistance, making it suitable for medical and food packaging caps.

• 3105 Aluminum Alloy: Contains a small amount of manganese and magnesium, offering higher strength and excellent tensile properties. It also has good deep drawing and welding performance, commonly used for beverage ring-pull caps and bottle caps.

Specification Parameters:

Performance Advantages of Aluminum Closure Sheet

1. Lightweight: Made from aluminum alloy, it has low density and lightweight, ideal for applications requiring weight reduction, such as pharmaceutical and cosmetic packaging.

2. High Corrosion Resistance: Aluminum alloys exhibit excellent corrosion resistance, maintaining a clean surface for prolonged periods and extending service life.

3. Good Sealing Performance: Aluminum closure sheets provide outstanding sealing performance, ensuring product safety and freshness, especially suitable for pharmaceutical and cosmetic bottle caps.

4. Easy Processing: With excellent deep drawing properties, the sheets can be processed into various complex shapes through stamping techniques, meeting diverse product customization needs.

5. Eco-friendly and Recyclable: Aluminum materials can be recycled and reused, aligning with green and sustainable principles and reducing resource waste.

6. Aesthetic and Practical: The surface of the deep-drawn aluminum sheet is specially treated to be aesthetically pleasing, and can feature ventilation hole designs to enhance practicality and decorative appeal.

Application Areas of Deep-Drawn Aluminum Closure Sheets

• Food and Beverage Packaging: Widely used in can caps, bottle caps, and ring-pull caps.

• Pharmaceutical and Cosmetic Packaging: Includes aluminum-plastic combination caps and sealing caps, offering excellent sealing performance.

Aluminum Closure Sheet Production Process

Melting and Casting: Aluminum ingots are melted at high temperatures and processed through a casting and rolling machine to produce preliminary aluminum sheets.

Hot and Cold Rolling: Hot rolling improves sheet density, followed by cold rolling to enhance strength and surface smoothness.

Annealing Treatment: Annealing at specific temperatures increases ductility and plasticity, ensuring deep drawing performance.

Surface Treatment: Includes coating, anodizing, or brushing to enhance corrosion resistance and decorative effects.

Forming and Stamping: Stamping equipment shapes the bottle or can caps as needed.

MC Aluminum is a professional manufacturer of aluminum bottle cap materials, specializing in producing 1070 aluminum strip, 3105 aluminum closure sheet, 8011 aluminum foil, 5052 aluminum alloy, and 5182 aluminum alloy. Our products are characterized by flat plate shape, accurate geometric dimensions, low ear rate, and excellent deep drawing performance. The product surface has high gloss and good alkaline washing effect, achieving A-grade water brushing test results. Exported to multiple countries worldwide, direct factory sales, favorable prices, and short delivery time.