Red 28mm ROPP Aluminum Closure

RED 28MM ROPP Aluminum Closure is a widely used aluminum pilfer-proof cap in the packaging industry, fully named "Roll-On Pilfer Proof" aluminum closure, specially designed for 28mm bottle necks. As a high-quality sealing solution, ROPP aluminum caps occupy an important position in multiple industries due to their excellent sealing performance, tamper-evident function, and customizability.

Basic Structure

Aluminum Shell: Provides good mechanical strength and corrosion resistance
Sealing Liner: Ensures airtightness and leak-proof performance
Tamper-Evident Band: Offers visual indication of product integrity

Red 28mm ROPP Aluminum Closure Technical Specifications

Red 28mm ROPP Aluminum Closure Dimensions

Diameter:
28mm, compatible with standard bottle neck diameters
Height:
Typically 15.45mm; exact size may vary slightly depending on manufacturer and application
Thread Specification:
Compatible with GPI-1621, GPI-1650, GPI-1655 and other standard specifications
Wall Thickness:
Standard aluminum cap wall thickness is usually between 0.2-0.3mm
Tamper-Evident Band Height:
Approximately 3-4mm, providing visible tamper-evidence

Red 28mm ROPP Aluminum Closure Material Characteristics

RED 28MM ROPP Aluminum Closure is mainly made from the following materials:

Main Material:
Standard aluminum (typically 3004 or 5052 aluminum alloy), offering good ductility, corrosion resistance, and recyclability
Sealing Liner:
Common materials include EVA, PE, TPE, ensuring excellent sealing performance
Surface Coating:
Pre-coated aluminum sheet, offering extra corrosion protection and a base for printing

HC Aluminum 28mm ROPP Closure

Red 28mm ROPP Aluminum Closure Color Options and Surface Decoration Methods

Rich Color Options

RED 28MM ROPP Aluminum Closure is available in various colors to meet different branding and product requirements:

Basic Color Series
Silver (natural aluminum), gold, white, black, and other classic colors
Custom Colors
Special colors can be customized according to Pantone or RAL color charts to meet brand personalization needs
Transparent/Semi-Transparent Effects
Special coating processes can achieve transparent or semi-transparent effects, enhancing visual appeal
Metallic Texture Effects
Offers glossy, matte, and frosted metallic textures

Diversified Surface Decoration Methods

Printing Technologies

Offset Printing: Delivers high-resolution, full-color effects Screen Printing: Suitable for large color blocks and special effect inks Curved Surface Printing: Designed specifically for printing on cap surfaces Wet-on-Wet Printing: Allows multicolor printing in a single workstation Internal Printing: Prints inside the cap, useful for promotions or branding messages

Hot Stamping and Embossing Techniques

Hot Foil Stamping: Transfers metallic foil onto the cap surface through high temperature and pressure
Cold Foil Stamping: Achieves foil effects without heating
Embossing: Creates a relief effect on the cap surface through pressure
Laser Engraving: Uses laser to carve high-precision patterns or text on the aluminum cap
Embossed Printing: Combines printing and embossing to create tactile surface effects

Surface Treatment and Coating Techniques

Anodizing: Forms an oxide layer on the aluminum surface through electrochemical treatment
Varnishing: Applies a transparent protective coating on the printed surface
Matte Finish: Achieved through special coating processes for a matte appearance
Glossy Finish: Achieved through high-gloss coating or polishing for a mirror effect
Antibacterial Coating: Functional coating that inhibits bacterial growth

Red 28mm ROPP Aluminum Closure Industry Applications and Case Studies

Alcohol and Spirits Industry Applications

RED 28MM ROPP Aluminum Closure holds a significant position in alcohol packaging, suitable for wine, spirits, craft beer, liqueurs, etc. Its reliable sealing prevents oxidation while allowing minimal micro-oxygenation to support wine aging.

Beverage Applications

Bottled Water:
Provides excellent airtightness and leak-proof performance to keep water fresh, suitable for natural and mineral water
Carbonated Drinks:
Specially designed vented versions can safely be used with carbonated beverages, releasing internal pressure
Juices and Juice Drinks:
Performs well in both hot-fill and cold-fill applications, with a wide temperature tolerance
RTD Coffee and Tea:
The aluminum cap market for RTD coffee shows year-on-year growth

Food Applications

Edible Oils and Condiments:
Provides excellent sealing, prevents oxidation and flavor loss; suitable for olive oil, vinegar, soy sauce, etc.
Honey and Syrups:
Strong resistance to stickiness, easy to open and reseal
Jams and Jellies:
Resistant to acidic environments, ensures reliable sealing performance
Dried Goods and Snacks:
Optional moisture-proof liners extend shelf life

Pharmaceutical and Healthcare Industry Applications

Pharmaceutical Packaging:
Provides reliable sealing to ensure drug stability within shelf life; suitable for oral liquid bottles, medical glass vials, etc.
Personal Care Products:
Used in perfume bottles, lotions and creams, essential oil bottles, offering elegant appearance and reliable sealing

Red 28mm ROPP Aluminum Closure Quality Control

Material Control: Comprehensive testing of raw materials using advanced technologies like spectroscopy; strict supplier evaluation and audit mechanisms
Production Process Control: Use of high-precision molds and automated production lines, application of AI vision inspection systems, implementation of Statistical Process Control (SPC)
Finished Product Testing: 100% appearance inspection, sealing test, opening torque test, and tamper-evident ring breakage force test

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