As early as 1892, American mechanical engineer William Painter invented the crown cap, originally designed with 24 teeth to replace cork stoppers, which were prone to leakage. By the 1930s, with the rise of automated production, the 24-tooth design often clogged filling machine hoses, and it was adjusted to 21 teeth.
The “21-Tooth” Design
The 21 evenly distributed serrations (crimps) ensure the cap grips the bottle mouth tightly while allowing easy removal by an opener or even by hand. This design achieves the optimal balance between sealing performance, opening force, and production cost.
HAOMEI Aluminum manufactures beer crown caps typically using 8011 food-grade aluminum sheet. Compared with traditional tinplate crown caps, aluminum crown caps are lighter in weight, more corrosion-resistant, and offer superior printability and decorative options. With colored spraying or printing technology, crown caps are not just sealing tools but also serve as an important medium for brand image promotion.
Beer Crown Cap Specifications
| Outer Diameter | 32.10 ± 0.20 mm |
| Inner Diameter | 26.75 ± 0.10 mm |
| Anti-Bending Deformation | 120–150 N |
| Pressure Resistance | ≥1000 kPa |
| Color | Red, yellow, black, etc. (customizable) |
| Liner Material | PE |
| Liner Weight | 220 ± 20 mg |
| Liner Inner Diameter | 19 ± 0.3 mm |
| Liner Outer Diameter | 24.5 ± 0.3 mm |
| Shape | Round |
| Application | Beer bottles |
| Packaging | Standard export cartons/pallets, or customized as required |
Performance Features of Crown Caps
Lightweight: Lighter than steel crown caps, helping reduce transportation costs.
Corrosion Resistance: Aluminum naturally resists rust; combined with inner and outer coatings, it performs well in acidic environments such as beer and carbonated drinks.
Reliable Sealing: Once crimped, the cap seals tightly with the bottle mouth, preventing CO₂ leakage and preserving the beer’s original taste and carbonation.
Customization: Colored surfaces can be used for brand promotion, seasonal campaigns, and commemorative packaging.
Eco-Friendly & Recyclable: Aluminum has high recycling value, supporting sustainable development.
Application Fields of Aluminum Crown Caps
Beer Bottling: Including craft beer, mainstream brands, and seasonal limited editions.
Carbonated Beverages: Cola, soda, sparkling water.
Juice Drinks: Premium bottled juices.
Energy Drinks: Certain glass-bottled energy beverages.
As an experienced bottle cap manufacturer, HAOMEI Aluminum also supplies aluminum pilfer-proof caps, aluminum-plastic caps, and plastic caps. Our products are exported to more than 40 countries and regions, including Germany, the United States, Canada, Australia, Japan, and South Korea. We can also provide processing services based on customer drawings, samples, or materials.
