As a professional bottle cap manufacturer, HAOMEI Aluminum produces aluminum pilfer-proof caps in various sizes, including 18mm, 22mm, 24mm, 28mm, and 30mm. The liners are available in polyethylene (PE), butyl rubber, or silicone rubber, with customization options to meet different customer needs. Printing colors, custom logos, and branding designs are also available.
What is an Aluminum ROPP Cap?
An aluminum ROPP cap initially starts as a smooth, threadless aluminum shell. During capping, the rollers of the ROPP capping machine apply pressure, rolling the cap tightly onto the bottle neck threads, forming a perfectly matched screw thread. At the same time, a perforated section at the lower edge of the cap locks into place. When the consumer twists the cap open, this portion breaks, leaving clear tamper-evidence that guarantees product safety.
Key Features of HAOMEI Aluminum ROPP Caps
Tamper-proof security: Once sealed, any unauthorized opening leaves visible evidence, ensuring consumer safety and brand protection.
Excellent sealing: With the liner in place, the cap provides effective leak-proof, moisture-proof, and oxidation-resistant protection, maintaining product freshness and quality.
High durability: Made from robust aluminum, the caps withstand transportation and long-term storage without damage.
Attractive and customizable: Available with screen printing, hot stamping, transfer printing, and other decorative processes to enhance brand image.
Eco-friendly and recyclable: Aluminum is fully recyclable, aligning with sustainability principles.
Role of the Liner
In ROPP caps, the liner is a critical component for sealing performance. Positioned between the cap and the bottle mouth, the liner is compressed during sealing, filling any microscopic gaps. This ensures airtightness, leak prevention, moisture resistance, and extended shelf life.
Liner Material Options
Polyethylene (PE): The most common option, widely used in wine, spirits, juices, and edible oils. It offers excellent compatibility and sealing performance.
Expanded Polyethylene (EPE): Provides superior impact resistance and toughness, ensuring complete leak-proofing while offering extra protection against environmental factors.
Sarantin / Saranex: Known for outstanding gas barrier properties and chemical stability, ideal for products requiring high barrier protection such as specialized beverages or chemicals.
Polyvinyl Chloride (PVC): Offers exceptional sealing properties, providing stronger airtightness compared to PE liners. Commonly used in pharmaceuticals and highly volatile liquids.
Product Information
| Product name | Aluminum ROPP Cap with Liner, Roll-On Pilfer-Proof Closure |
| Material | 8011 / 3105 Aluminum |
| Color | Multiple options available |
| Customization | Accepted |
| Type | ROPP Screw Cap |
| Payment | T/T (Telegraphic Transfer) |
| Feature | Tamper-proof |
| Application | Bottle closure |
| Production time | 2-5 weeks |
| MOQ | 80,000 pieces |
Main Applications
Thanks to their excellent performance, aluminum ROPP caps with liners are widely used in:
Alcoholic beverages: Wine, spirits, and liquors
Soft drinks: Juices, carbonated beverages, mineral water
Pharmaceuticals: Oral solutions, syrups
Edible oils: Cooking oils of various types
Condiments: Ketchup, soy sauce, and other sauces
