In modern pharmaceutical packaging, an oral liquid bottle cap is far more than a simple sealing component. It is a comprehensive solution that ensures product safety, ease of use, anti-counterfeiting and tamper-evidence, and brand image. Among many cap materials, 8011 aluminum alloy has become the mainstream choice for oral liquid aluminum caps due to its unique performance advantages.

Why is 8011 aluminum alloy typically used for oral liquid aluminum caps?

1. Excellent deep-drawing performance: 8011 aluminum alloy offers good ductility and deep-drawing properties, allowing it to be easily formed into complex cap shapes.

2. Good mechanical strength: Despite its excellent formability, 8011 aluminum maintains sufficient mechanical strength to ensure the cap resists deformation or damage during production, transportation, and use, preserving product integrity.

3. Corrosion resistance: Aluminum alloys have inherently good corrosion resistance, especially against typical oral liquid ingredients such as water, ethanol, and sugars. This ensures the cap won’t rust or react adversely with the contents during its service life.

4. Non-toxicity: As a material in direct contact with medicine, 8011 aluminum alloy meets food-grade and pharmaceutical-grade safety standards. It is non-toxic, odorless, and will not negatively impact the quality or safety of the oral liquid-one of the most fundamental requirements for pharmaceutical packaging.

5. Ease of processing and surface treatment: 8011 aluminum alloy can undergo various surface treatments such as printing, coating, or anodizing. This not only enhances its appearance but also further improves corrosion resistance and sealing performance. For oral liquid products, clear printing on the cap (e.g., batch number, expiration date) is also crucial.

6. Lightweight: The low density of aluminum makes the caps light, helping reduce overall packaging weight and thus lowering transportation costs.

7. Excellent recyclability: Aluminum is highly recyclable, aligning with modern environmental sustainability goals and reducing resource consumption and pollution.

8011 Aluminum Alloy for Small Bottle Sealing – Product Information

Technical Parameters for Pharmaceutical Cap Material:

Strict Requirements for Aluminum Alloy Cap Material

The strict requirements for aluminum cap materials mainly include mechanical strength, elongation, dimensional tolerance, and surface quality.

• Strength and elongation: Aluminum caps must meet rigorous strength and ductility standards to ensure smooth, crack-free forming on highly automated production lines, facilitating post-forming printing.

• Dimensional tolerance: Precise dimensional control ensures that caps fit bottles perfectly and achieve reliable sealing performance.

• Surface quality: The cap surface must be flat, free of oil stains, wrinkles, or severe indentations. The roll edges should be neat without cracks or burrs to guarantee both aesthetics and user comfort.

Additionally, the production process must consider environmental and safety factors, such as ease of recycling and compliance with food and pharmaceutical safety standards. These stringent requirements ensure that aluminum alloy caps offer clear advantages in sealing, moisture resistance, oxidation protection, aesthetics, high-temperature performance, corrosion resistance, and environmental safety, making them widely used in food, pharmaceutical, cosmetic, and chemical packaging.