28mm Aluminum Cap
The 28mm aluminum cap is a type of metal closure designed to fit bottles with a 28mm neck. It is commonly used in the beverage, pharmaceutical, and cosmetics industries. These caps provide a secure, tamper-evident seal, ensuring the integrity and freshness of the product.
28mm aluminum caps are available in a variety of colors and finishes, including silver, gold, and black.
The 28mm aluminum cap is typically made from high-quality aluminum, which is lightweight, highly corrosion-resistant, and offers good mechanical properties to provide strong sealing capabilities. Additionally, the anti-oxidation properties of aluminum allow these caps to maintain a long service life even in humid environments.
HC Cap Manufacturing Co., Ltd. has over 17 years of experience providing various aluminum caps, plastic caps, aluminum-plastic caps, glass bottles, and other packaging products. Our products are exported to more than 20 countries worldwide, including the USA, Europe, South Africa, Southeast Asia, and more.
28mm Aluminum Cap Types
| Product Type | Image | Description |
| 28mm Aluminium Screw Cap |
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The 28mm aluminium screw cap is a common type of bottle closure, designed to seal the bottle neck by screwing it in. It is easy to use, allowing consumers to easily open or close the cap by rotating it. This type of aluminum cap is suitable for various beverage and cosmetic bottles, providing reliable sealing performance and ease of use, particularly for products that require frequent opening and closing. |
| 28mm Aluminium ROPP Cap |
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The 28mm aluminium ROPP cap uses a special crimping process to provide a tamper-evident feature. When the cap is opened, the neck of the bottle will show visible signs of damage, ensuring that consumers can identify whether the product has been opened or tampered with. This type of aluminum cap is widely used for products that require high security, such as pharmaceuticals and certain food and beverage items, ensuring the product’s integrity and safety during transportation and sale. |
28mm Aluminum Cap Sizes
- The standard size is 28mm, designed for bottles with a neck diameter of 28mm.
- Custom sizes: Can be tailored according to customer requirements to fit different bottle neck sizes or design needs.
28mm Aluminum Cap Colors and Surface Treatments
The color and surface treatment of 28mm aluminium caps can be customized according to customer requirements. Common colors include:
- Silver: A classic appearance, suitable for most products.
- Gold: Ideal for the high-end market and luxury brands, with a glossy finish.
- Black: Commonly used for alcoholic beverages, cosmetics, etc., giving a more sophisticated and elegant look.
In addition, aluminum caps can undergo various surface treatments, including:
- Polishing: Enhances gloss, suitable for premium products.
- Color coating: Provides different colors for the cap, enhancing brand recognition.
- Spray coating: Adds different layers to the cap to meet anti-corrosion or decorative functions.
28mm Aluminum Cap Features
- Tamper-evident function: The ROPP aluminium cap features a unique process that allows the cap to break upon opening, ensuring that the bottle neck has not been tampered with, thus increasing the product's security.
- Strong sealing: Aluminium caps offer excellent sealing performance, preventing leakage of liquids or gases from the bottle, ensuring the quality and freshness of the product inside.
- Wide applicability: Due to their reliable sealing and easy opening features, 28mm aluminium caps are widely used in food, beverage, pharmaceutical, cosmetics, and many other industries.
28mm Aluminum Cap Customization Services
Printing and labeling: 28mm aluminium caps can be customized with printing services to meet branding needs. Through screen printing, heat transfer printing, and other techniques, brand logos, product information, or designs can be printed on the aluminium cap.
Samples and Minimum Order Quantity
- Samples: Customers can request samples to evaluate the quality and compatibility of the caps.
- Minimum Order Quantity: The minimum order quantity is generally 20, 000 aluminium caps. The exact quantity can be negotiated based on the customer's needs and order volume.
28mm Aluminum Cap Features
- Material: Aluminum, known for its light weight and corrosion resistance.
- Design: Typically features a threaded surface or tamper-evident design, such as the Roll-On Pilfer Proof (ROPP) mechanism, to ensure product integrity and consumer safety.
- Liner Type: Equipped with various liner materials to suit different products. The inside of the cap usually includes liners made of polyethylene (PE), polypropylene (PP), or expanded polyethylene (EPE). These liners provide reliable sealing, prevent leakage, and maintain product freshness.
- Heat Resistance: Depending on the liner type, these caps can withstand temperatures ranging from 80°C to 121°C, making them suitable for various filling and pasteurization processes.
28mm Aluminum Cap Applications
| Application Area | Description |
| Beverage Industry | 28mm aluminum caps are widely used in the beverage industry, primarily for bottled drinks such as juices, mineral water, carbonated drinks, etc. These caps provide reliable sealing to ensure product safety during storage and transportation, while maintaining the freshness and flavor of the beverage. |
| Pharmaceutical Industry | In the pharmaceutical industry, 28mm aluminum caps are used to seal medicine bottles, ensuring that the products are not contaminated during storage and transportation, maintaining their safety and hygiene. The tamper-evident feature is particularly important, effectively preventing consumers from accessing unopened medicines. |
| Cosmetics Industry | 28mm aluminum caps are widely used in the cosmetics industry, mainly for perfume bottles, skincare product bottles, etc. These caps not only provide excellent sealing to prevent leakage but also offer an attractive appearance and decorative qualities, enhancing the high-end feel and brand image of the product. |
The 28mm aluminum cap, with its superior sealing performance, excellent customization for appearance, and tamper-evident features, has become an indispensable component for bottled products in various industries.
Precautions
- Application Method: Certain aluminum caps, such as ROPP (Roll-On Pilfer Proof) caps, require specific machines like a roll-on capping machine.
- Compatibility: Ensure the liner material of the cap is compatible with the product to prevent chemical reactions or degradation.
The 28mm aluminum cap is a versatile and reliable sealing solution, featuring tamper-evident seals, heat resistance, and recyclability, making it the preferred choice across various industries.
HC Aluminum Cap Quality Inspection
HC Cap Manufacturing Co., Ltd. conducts a series of quality checks to ensure that the caps meet standards during production and effectively guarantee their sealing performance, durability, and applicability.
| Test Type | Purpose | Testing Method | Requirements/Precautions |
| Sealing Test | To ensure the sealing effect between the cap and bottle mouth. | Check if the cap surface is smooth and intact. | Ensure perfect sealing to prevent leakage. Suitable for non-carbonated liquid products. |
| Torque Testing | To test the torque required to tighten or open the cap. | Measure the torque required to tighten or open the cap. | The torque should generally be below 1.0N·m. Excessively high torque may affect user experience. |
| Sealing Test (Liquid) | To test the leakage of liquid products. | Invert the bottle and apply a vacuum to check for leaks. | Ensure there is no liquid leakage, verifying the sealing function of the cap. |
| Air Tightness Test | To test the retention of gas in carbonated products. | Perform positive and negative pressure tests to check for gas leaks. | Ensure the gas seal inside the bottle is intact, preventing bubble formation or gas loss. |
| High Temperature Test | To evaluate the cap’s performance under high-temperature conditions. | Expose the cap to temperatures of 90°C and 121°C, and observe if there is any deformation. | The cap should not deform or fail under heat treatment or high-temperature environments, while maintaining its sealing function. |
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