DC (Direct Cast) and CC (Continuous Cast) aluminum closure sheets are specialized materials used primarily for creating bottle caps and can ends. They are manufactured through different casting processes, each offering unique properties that cater to diverse packaging requirements. These sheets are particularly valued for their strength, surface finish, and ability to accommodate complex designs, making them ideal for various closure systems.
Composition and Manufacturing Processes
| Specifications | ||||||||
| Alloy | Temper | Thickness | Width | Length | Coil | Strip | Earing | Diagonal |
| 3105, 8011 | H14, H16, H24, H26 | 0.15~0.25 mm (+/-0.005mm) | 500~1000 mm (+0.5mm, -0mm) | 500~1000 mm (+0.5mm, -0mm) | 500~1000 mm | 20~500 mm | 1 | ≤ 1mm |
Chemical Compositions DC & CC Aluminum Closure Sheet | ||||||||||||
| Alloy | Fe | Si | Cu | Mn | Mg | Cr | Zn | Ni | Ti | Other | Al | |
| Each | Total | |||||||||||
| 8011 | 0.60~1.0 | 0.50~0.9 | 0.1 | 0.2 | 0.05 | 0.05 | 0.1 | – | 0.08 | 0.05 | 0.15 | Remain |
| 3105 | 0.7 | 0.6 | 0.3 | 0.3~0.8 | 0.2~0.8 | 0.2 | 0.4 | – | 0.1 | 0.05 | 0.15 | Remain |
| Mechanical Property For Direct Casting | ||||
| Alloy | Temper | Thickness(mm) | U.T.S(Mpa) | Elongation(%) |
| 8011 | H14 | 0.15~0.25 | 125~155 | ≧2 |
| 3105 | H14 | 0.15~0.25 | 150~200 | ≧1 |
DC (Direct Cast) Aluminum Closure Sheets
Manufacturing Process: The direct casting method involves producing aluminum sheets through a cooling and solidification process. This method allows for excellent control over the sheet thickness and mechanical properties.
Properties: DC aluminum sheets offer superior surface quality and mechanical strength, making them suitable for applications requiring high formability and precise finishes.
CC (Continuous Cast) Aluminum Closure Sheets
Manufacturing Process: Continuous casting involves the solidification of aluminum in a continuous process, which is then rolled into sheets. This approach is efficient for high-volume production.
Properties: CC aluminum sheets are known for their cost-effectiveness and consistent quality, providing excellent dimensional stability and uniformity.
Benefits of DC & CC Aluminum Closure Sheets
Lightweight and Durable: Aluminum’s inherent lightness does not compromise its strength, making it an ideal choice for closures that require durability and ease of handling.
Corrosion Resistance: Both DC and CC aluminum sheets offer excellent resistance to corrosion, ensuring product integrity and longevity even in challenging environmental conditions.
High Customizability: The malleability of aluminum allows for intricate designs and customization, enabling brands to create unique and appealing packaging solutions.
Recyclability: Aluminum is 100% recyclable, supporting sustainable practices and reducing environmental impact, which is increasingly important in today’s eco-conscious market.
Applications
Beverage Industry: Ideal for bottle caps and can ends, ensuring a tight seal to preserve flavor and carbonation.
Pharmaceuticals: Used in closures for medical vials and containers, providing a reliable and tamper-evident seal.
Cosmetics: Perfect for closures in personal care products, where attractive finishes and corrosion resistance are paramount.
