HAOMEI Aluminum manufactures high-strength 31.5 mm aluminum ROPP caps, widely used in the packaging of alcoholic beverages, edible oils, and soft drinks. Made from durable aluminum alloy, these caps typically come in heights of 18mm, 24mm, or 44mm, and are designed with a tamper-evident band that breaks upon first opening, effectively preventing reuse and ensuring product authenticity.
What Is an EPE Liner?
EPE (Expanded Polyethylene) is a foam-based liner material, usually die-cut into round discs and pre-bonded to the top inner surface of the cap using hot or cold adhesive. It ensures a tight seal with the bottle mouth.
EPE liners come in different densities (e.g., 0.03g/cm³), which affect their compressibility, rebound resilience, sealing effectiveness, and cost.
Key Advantages of EPE Liners:
Moisture Sealing: Excellent waterproofing properties that block moisture and help maintain the stability of the product. When paired with aluminum caps, they provide dual sealing protection.
Shock Absorption: The closed-cell structure absorbs over 90% of shock impact, protecting both the bottle mouth and the product (especially fragile items).
Eco-Friendly & Safe: Made from non-toxic, food-grade recyclable materials suitable for direct contact packaging.
This combination of aluminum ROPP closure and EPE foam liner is widely used in premium spirits like vodka and high-end beverage packaging. EPE liners also perform well in extreme temperatures (-70°C to 85°C) and can be treated for anti-static properties.
31.5mm ROPP Cap Product Details
| Size | 31.5 x 24mm (customizable) |
| Material | Aluminum 8011 |
| Type | Screw Cap / Roll-On Pilfer-Proof |
| Colors | Black, Gold, or customized |
| Decoration Options | Side printing, screen printing, hot stamping (gold/silver), embossing, etc. |
| Liner Options | EPE, PE foam, grinding disc liners, tin foil liners, plastic-molded liners, etc. |
| OEM / ODM | Accepted |
| Samples | Available upon request |
| Applications | Spirits, wine, beverages, olive oil, and more |
| Packaging | Carton + Pallet |
| MOQ | 80,000 pieces |
Multi-Scenario Use
Spirits and Wine Closures: Enhances brand image, ensures product safety, and easy opening.
Premium Edible Oil Packaging: Prevents leakage and oxidation (e.g., olive oil, flaxseed oil).
Pharmaceutical & Nutraceutical Bottles: Protects active ingredients and prevents contamination.
FAQ
Q1. What is the Minimum Order Quantity (MOQ)?
A1. For new products, our MOQ is 80,000 pieces.
Q2. Do you offer customization?
A2. Yes, OEM and ODM are welcome. Please send us your design—AI or PDF files are preferred. Our designers can also assist in creating artwork based on your design elements.
Q3. Do you provide samples?
A3. Yes, we offer free samples. However, shipping charges are to be borne by the customer.
Q4. How do you ensure product quality?
A4. Our products are certified under ISO 9001, ISO 14001, and SGS standards.
