Since the 1990s, the application range of ROPP caps has expanded rapidly. Beyond wine packaging, they are now widely used in spirits, edible oils, sauces, and premium beverages. The 31.5x44mm size has become one of the most popular specifications due to its compatibility with standard Bordeaux wine bottles.
HAOMEI Aluminum is a professional bottle cap manufacturer with extensive experience producing aluminum caps, aluminum-plastic caps, and plastic caps in various sizes. Multiple printing options such as logo silk-screening, hot stamping, and UV printing are available to meet diverse branding needs.
Customization Options
Customization is the core of aluminum ROPP cap production, enabling personalized designs to meet specific brand requirements.
Surface Treatments:
Printing: Multi-color printing on the top or side of the cap with your brand logo, product name, or promotional artwork.
Hot foil stamping (gold/silver): Popular among premium brands to add metallic brilliance and enhance luxury appeal.
Embossing: Raised patterns or lettering on the cap surface for a distinctive tactile and visual effect.
Color matching: Custom colors available according to Pantone codes to match your brand palette or packaging style.
Liners: Select from different liner materials depending on the product (wine, spirits, edible oils) to ensure optimal sealing and chemical compatibility.
31.5x44mm Aluminum ROPP Cap Product Information
| Diameter | 31.5 mm |
| Neck finish diameter | 31.5 mm |
| Height | 44 mm |
| Material | Aluminum 8011 |
| Weight | 3.72 g |
| Colors | Silver, yellow, black, customizable |
| Neck finish type | Tamper-evident |
| Printing | Top and side offset printing, multi-color printing accepted |
| Finish | Gloss, satin, or matte |
| Processes | Flat printing, side offset printing, knurling, bridging, top embossing (with color) |
| Compliance | All paints, inks, and liners used are FDA-approved |
| Feature | Pilfer-proof |
| Type | Screw cap |
| Samples | Available |
| Packaging | Standard export carton/pallet or as required |
| Applications | Alcoholic beverages, non-alcoholic drinks, etc. |
| MOQ | 80,000 pieces |
Key Features of the 31.5x44mm Pilfer-Proof Aluminum Cap
Tamper-evident ring: Pre-cut at the base of the cap. When first opened, the ring breaks away and remains on the bottle neck, providing a clear visual indicator that the product was unopened before purchase.
Sealing performance: Equipped with liners (e.g., PE or PVC) to ensure a tight seal between cap and bottle, effectively preventing leakage and oxygen ingress, preserving the quality of wine or beverages.
Easy opening: Threaded design allows smooth unscrewing, while the break-away ring ensures the opening process is both secure and user-friendly.
Application Fields of the 31.5x44mm Aluminum Screw Cap
Alcohol packaging: Wine, whiskey, vodka, brandy, etc.
Edible oil packaging: Olive oil, flaxseed oil, sesame oil, and other premium oils.
Pharmaceuticals & health products: Liquid formulations requiring high seal integrity and tamper-evident protection.
Premium beverages: Juices, functional drinks, herbal beverages, and more.
Why Choose Our 31.5x44mm Pilfer-Proof Aluminum Screw Caps?
Fully automated production: Precision molds and high-speed stamping ensure dimensional consistency.
Global export experience: Products shipped to Europe, South America, the Middle East, and Southeast Asia, meeting multiple international food contact standards.
Strict quality control: From raw materials to finished products, ISO quality management system is implemented throughout.
Flexible customization: Suitable for both small-batch trials and large-scale mass production.
