HAOMEI Aluminum's 28mm ROPP caps are made from high-quality aluminum, featuring lightweight construction, corrosion resistance, and excellent mechanical strength. They can be paired with PE/EPE liners to enhance sealing performance. The caps are equipped with a tamper-evident feature-once opened, they cannot be resealed, effectively preventing unauthorized access to the product.
The 28mm aluminum caps are widely compatible with PET bottles, glass bottles, and other juice packaging containers, offering excellent market versatility. Common height specifications include 28×15mm, 28×18mm, etc., to meet different bottle capacities and juice packaging requirements.
Compared with traditional plastic caps, 28mm aluminum ROPP caps offer superior sealing performance, effectively preventing oxygen penetration, preserving the natural flavor and nutritional value of the juice.
HAOMEI Aluminum uses SACMI high-speed production equipment for the 28mm caps, achieving a production rate of up to 2,500 caps per minute. These caps are compatible with standard capping machines. Additionally, we offer customization services, including embossing, printing, and anodized color finishes, enabling juice brands to create unique packaging designs and enhance shelf visibility.
HAOMEI Aluminum 28mm Juice Bottle Cap - Core Technical Advantages
1. Excellent Sealing and Barrier Properties
Liner Technology: ROPP caps require specific internal liners (PVC, PE, or TPE). Juice products typically use acid- and alkali-resistant, high-barrier liners to ensure a tight seal after rolling onto glass or PET bottles.
Oxygen Barrier: Superior sealing prevents oxygen ingress, which is critical for delaying oxidation, preserving vitamins, and maintaining flavor.
2. Compatibility with Hot-Fill and High-Temperature Sterilization
Heat Resistance: ROPP aluminum caps and liners can withstand hot-fill or sterilization processes between 85–95°C without deformation or failure.
Vacuum Retention: During hot-fill cooling, a vacuum forms inside the bottle. ROPP caps maintain this vacuum, ensuring product integrity and freshness.
3. Reliable Tamper Evidence and Food Safety
Tamper-Evident Ring: The visible tamper ring breaks upon first opening, providing clear indication of product integrity and preventing unauthorized access or contamination.
Aluminum Safety: Caps use food-grade aluminum, with liners and coatings compliant with national and international food contact standards, preventing reactions with acidic juice contents.
28mm Aluminum ROPP Cap Specifications
| Diameter | 28mm |
| Height Options | 15mm / 18mm / 22mm (customizable) |
| Material | 8011 / 3105 aluminum |
| Printing | Multi-color offset, screen printing, side printing, hot stamping |
| Color Options | Silver, gold, black, red, blue, green, and custom colors |
| Liner Material | PE, TPE, EVA food-grade sealing pad |
| Opening Type | Screw-on (with tamper-evident ring) |
| Sealing Performance | ≥ 0.5MPa, leak-proof |
| Compatible Bottles | Glass / PET / Plastic |
| Environmental Standards | FDA, EU, RoHS, REACH compliant |
| Customization | Size, color, logo printing, surface treatment |
| Packaging | Cartons + PE inner bag / custom pallet packaging |
| Applications | Mineral water, juice, carbonated beverages, etc. |
| MOQ | 80,000 pieces |
FAQ
Q1: Are ROPP caps safe and eco-friendly?
A1: Yes. The liners are made from food-grade PE/PP, and the metal part is recyclable, meeting environmental and food safety standards.
Q2: Are the caps tamper-evident?
A2: Yes. ROPP caps feature a breakable tamper ring that is clearly visible upon opening, ensuring anti-tampering protection.
Q3: Can the caps be customized with printing and colors?
A3: Yes. Caps can be customized with colored coatings, screen printing, or laser engraving to meet brand promotion needs.
Q4: Can 28mm ROPP caps withstand filling pressure?
A4: Yes. Precision rolling ensures the caps can handle standard juice filling pressures without leakage or bursting.
