30x35mm Aluminium ROPP Cap

The 30x35mm Aluminium ROPP Cap, with its tamper-evident security, high sealing performance, eco-friendly attributes, and deep brand customization capability, has become the preferred choice for premium liquid packaging. When sourcing, special attention should be given to liner compatibility (e.g., wine requires an antioxidant liner) and durability of printing (e.g., alcohol rub test).

Made from high-quality aluminum alloy, the 30x35mm Aluminium ROPP Cap is carefully engineered to provide a safe and reliable tamper-evident seal, ensuring the freshness, integrity, and safety of the contents. Lightweight yet durable, it is an ideal choice for various bottle types, delivering excellent performance in both product preservation and transportation.

30x35mm Aluminium ROPP Cap Specifications

Item	Detailed Description
Material	High-quality aluminum alloy, with excellent corrosion resistance and durability
Size	30mm x 35mm, suitable for various bottle sizes
Liner	EPE (Expanded Polyethylene)/ Saranex, ensuring a tight, leak-proof seal
Color	Gold, silver, black, white, blue, red, green, etc. customizable
Color
Decoration Methods	Embossing, UV Printing, Hot Foil, Silk Screen Printing
Safety Design	Tamper-evident, theft-proof design, providing leak-proof sealing to ensure product integrity
Corrosion Resistance	The aluminum cap has high corrosion resistance, suitable for preserving the taste and freshness of contents over extended periods
Weight	Lightweight yet durable, easy to transport and handle, reducing shipping costs and the risk of damage
Recyclability	The aluminum material is recyclable, supporting environmental protection and sustainability
Main Application Areas	Alcoholic beverages, specialty foods, and other products requiring tamper-evident and leak-proof closure
Packaging	Carton packaging, 1600 caps per carton, carton size: 50cm x 32cm x 30cm

Structure of 30x35mm Aluminium ROPP Cap

30×35mm: Indicates a cap diameter of 30mm and height of 35mm, a standardized aluminum screw cap specification specifically designed for glass bottles.

ROPP (Roll-On Pilfer-Proof): A mechanical roll-on technique tightly affixes the aluminum cap to the bottle mouth, achieving tamper-evident and single-use sealing. Upon opening, the bottom tamper band breaks and remains on the bottle neck, providing clear evidence of tampering.

Structural Advantages

Three-Layer Tamper-Proof Design :

Outer layer: Aluminum alloy shell (provides structural strength)

Middle layer: Tamper-evident band (breaks upon opening)

Inner layer: Food-grade sealing liner (ensures airtightness)

Non-refillable

Cannot be resealed once opened, preventing counterfeit product refilling. Complies with pharmaceutical and premium spirits safety regulations.

Eco-Friendly and Sustainable

Aluminum is 100% recyclable, has lower carbon emissions than plastic and cork, and aligns with carbon neutrality trends.

Materials of 30x35mm Aluminium ROPP Cap

Core Materials of 30x35mm Aluminium ROPP Cap

Food-grade aluminum alloy: Common grades include 8011 H14/H16, featuring lightweight, corrosion resistance, and high strength. Meets food safety standards such as FDA and EU regulations.
Liner materials: Options include PE liner, tin foil liner, or Saranex™ barrier film to effectively block oxygen and contaminants, extending shelf life (especially suitable for wine and spirits).

Material Characteristics of 30x35mm Aluminium ROPP Cap

Material: Primarily made of premium aluminum alloy, offering light weight, high strength, and corrosion resistance. Effectively protects the bottle contents from external environmental impact.
Sealing performance: Equipped with EPE (expanded polyethylene) or Saranex liner, which offers excellent elasticity and flexibility. When the cap is tightened, the liner adheres closely to the bottle mouth, forming a strong seal that effectively prevents leakage, evaporation, and the intrusion of air, moisture, and impurities.
Tamper-evidence: The ROPP cap is a breakaway tamper-evident cap. A weak ring at the connection between the cap and bottle breaks upon first opening, separating the cap from the bottle and leaving visible signs of opening. This enhances tamper protection and product integrity.

Customization Options for 30x35mm Aluminium ROPP Cap

Printing and Customization

Printing techniques: Supports a variety of printing methods, such as offset printing, screen printing, and UV printing. Allows for printing of intricate patterns, text, and identifiers on the cap—such as brand logo, product name, production date, and expiration date—enhancing brand recognition and market appeal.
Custom services: Can be customized according to customer needs, including cap color, printing, shape, size, material, and sealing liners. Personalized design meets the specific packaging requirements of different clients, creating a unique brand image.

Customization Item	Available Options
Printing Technique	Offset Printing, Screen Printing, UV Printing, Hot Stamping/Embossing
Surface Finish	Glossy / Matte Texture (for enhanced grip), Partial Laser Anti-counterfeiting Mark
Color	Standard colors such as red, white, black, or customized Pantone colors (covering both top and side of the cap)
Marking & Anti-counterfeiting	Supports dual-zone printing (top/side), with optional integration of QR codes, batch numbers, and brand logos

30x35mm Aluminium ROPP Cap Applications

Application	Description	Commonly Selected Liner
Bottled Juice	30x35mm aluminum ROPP bottle caps are commonly used for bottled juice, ensuring the freshness of the beverage inside the bottle by preventing air from entering and causing oxidation. They help extend the shelf life and prevent leakage, ensuring the taste and quality of the juice.	Polyethylene (PE) Liner
Carbonated Drinks	30x35mm aluminum ROPP bottle caps are widely used in carbonated drinks, effectively sealing the bottle to keep carbon dioxide inside, maintaining the bubbles and taste of the beverage, and preventing gas leakage and spillage, ensuring the drink stays fresh and maintains its flavor.	Polypropylene (PP) Liner
Mineral Water Bottles	30x35mm aluminum ROPP bottle caps provide perfect sealing for mineral water bottles, ensuring that the water inside is not contaminated by external environments and preventing changes in water quality. This guarantees the safety and taste of the water consumed.	Polyethylene (PE) Liner
Beer Bottles	30x35mm aluminum ROPP bottle caps are commonly used in beer bottles. They effectively isolate air and external bacteria, ensuring the stable flavor of the beer, preventing leakage or oxidation, and allowing consumers to enjoy fresh and pure flavor every time they open the bottle.	EVA (Ethylene-Vinyl Acetate Copolymer) Liner
Wine Bottles	30x35mm aluminum ROPP bottle caps provide excellent sealing in wine bottles, preserving the original flavor of the wine, preventing oxidation, ensuring the maturity and storage quality of the wine, and avoiding external contamination.	Aluminum Foil Liner
Spirits Bottles	30x35mm aluminum ROPP bottle caps are used in spirits bottles, offering strong sealing to prevent alcohol evaporation and the intrusion of external air, ensuring that the aroma and quality of the spirit remain intact for a long time, even during extended storage.	Aluminum Foil Liner
Olive Oil Bottles	30x35mm aluminum ROPP bottle caps are widely used in olive oil bottling. Their excellent sealing properties ensure that the oil is not exposed to external contaminants and oxidation during storage, helping to preserve the freshness and flavor of the olive oil and maintaining its unique aroma.	Polyvinyl Chloride (PVC) Liner
Vinegar Bottles	30x35mm aluminum ROPP bottle caps provide effective sealing in vinegar bottles, preventing the vinegar from being affected by air and undergoing changes in quality. They help maintain the sourness and freshness of the vinegar, while also avoiding leakage, ensuring an ideal experience every time it is used.	EVA Liner

Production & Quality Control of 30x35mm Aluminium ROPP Cap

Production Process:

Stamping → Printing/Surface Treatment → Liner Injection → Tamper Band Pre-assembly → Full Machine Inspection (Zero Defect Standard)

Quality Control:

Each batch undergoes sealing tests and torque testing (for consistent opening force)

Production Process: Utilizes advanced automated production equipment and techniques—from aluminum sheet cutting, stamping, forming, and threading to liner installation and printing. Each step is subject to strict quality control and inspection to ensure all caps meet high-quality standards.
Quality Testing: During production, multiple quality checks are conducted—such as appearance inspection (checking for scratches, dents, or deformation), dimensional testing (ensuring cap diameter, height, and thread match design specifications), sealing performance testing (using pressure tests to verify tightness), and tamper-resistance testing (simulating real opening scenarios to check breakability and consistency of the tamper band)—to ensure stable and reliable product quality.

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