28mm ROPP Aluminum Cap with Plastic Tamper-Evident Band

The tamper-evident ROPP aluminum cap with plastic band is suitable for a wide range of containers across different markets. It is commonly used for glass bottles filled with mineral water, natural water, soft drinks, and juices, as well as aluminum bottles for carbonated beverages.

What is a ROPP Cap?

ROPP (Roll-On Pilfer-Proof) caps are metal closures formed with threading by a special capping machine during application. Initially a smooth aluminum sleeve, the cap is rolled and shaped to match the bottle neck, forming tight-fitting threads. The 28mm diameter is among the most widely used and fits standard bottle necks across multiple industries.

Why Add a Plastic Tamper-Evident Band?

Adding a plastic tamper-evident ring enhances product security. When the cap is twisted open for the first time, the ring breaks off and remains on the bottle neck, providing clear visual evidence of tampering.

Key Benefits:

• The ring breaks or separates to leave a one-time tear mark

• Prevents resealing or counterfeiting

• Enhances consumer confidence that the product has not been opened

This structure is especially important for spirits, health drinks, and medicinal liquids.

Material & Structure of the Tamper-Evident ROPP Cap

Aluminum-Plastic Composite Design

Outer shell: Aluminum ROPP cap (for sealing strength and rigidity)

Inner band: Embedded plastic tamper-evident ring (for tamper protection)

1. Aluminum Shell

Material: 8011-H14 or 3105-H16 aluminum alloy – known for excellent ductility, corrosion resistance, and forming performance.

Structure: Flat top, rolled edge, with internal liner (EPE or PVC-free) to ensure airtight sealing.

Finish options: Available in spray coating, anodizing, electrophoresis, etc., supporting brand printing and anti-corrosion.

2. Plastic Tamper-Evident Ring

Material: Made from food-grade PP (polypropylene) or PE (polyethylene) – non-toxic, odorless, durable, and designed to tear cleanly.

Function: Separates from the cap upon opening, leaving an irreversible mark to clearly indicate the product has been opened.

Product Specifications – 28mm Aluminum-Plastic Cap

Key Advantages of Tamper-Evident ROPP Aluminum-Plastic Caps

1.Product Safety & Integrity

The tamper-evident band helps prevent unauthorized access or contamination, ensuring consumers receive unopened products.

2.Consumer Trust

Visible tamper evidence enhances brand trust—especially vital for food, beverage, and pharmaceutical industries.

3.Excellent Sealing Performance

Tight cap-to-neck fit with a secure liner ensures leak-proof sealing and preserves product freshness and shelf life.

4.Brand Value

Aluminum caps provide a premium look and feel; customizable color and printing options enhance branding and shelf appeal.

5.Durability & Sustainability

Aluminum is corrosion-resistant, lightweight, strong, and 100% recyclable—ideal for environmentally conscious packaging.

Application Fields for 28mm Tamper-Evident Aluminum-Plastic Caps

• Non-Alcoholic Beverages: Mineral water, juice, soft drinks, energy drinks, tea drinks

• Alcoholic Beverages: Wine (especially screw-cap wines), spirits, some beers

• Edible Oils & Condiments: Olive oil, soy sauce, vinegar

• Pharmaceuticals & Health Products: Oral liquids, syrups, functional drinks

• Cosmetics & Personal Care: Shampoo, lotions, toners

Why Choose Us?

1. Over 10 Years of Industry Experience
   We specialize in aluminum caps and metal packaging, offering deep expertise and reliable global service.

2. Quality First, Strict Standards
   We use food-grade aluminum and premium plastic materials that comply with FDA / ISO standards and pass multiple quality tests.

3. Strong Customization Capability
   We support a wide range of customization—sizes, colors, logos, structures—to help your brand stand out.

4. Stable Production & On-Time Delivery
   Automated production lines and professional supply chain systems ensure timely delivery, even for large-volume orders.

5. Global Reach, Professional Support
   Our products are exported to 50+ countries across Europe, the Middle East, Southeast Asia, and more, with multilingual sales and technical support.