18mm Aluminium Screw Cap
The 18mm aluminium screw cap is a closure used to seal bottles with an 18mm neck, commonly applied in industries such as wine, cosmetics, food, pharmaceuticals, and personal care.
The 18mm aluminium screw cap is a versatile sealing solution widely used for sealing bottles and containers across various industries, including pharmaceuticals, cosmetics, food and beverage, and laboratory settings.
18mm Aluminium Screw Cap Basic Parameters
- Diameter: The threaded part of the cap has a diameter of 18mm, suitable for standard external thread container mouths.
- Material: Made of aluminium, combining lightweight and corrosion resistance, suitable for laboratory and industrial applications.
- Structure: Comprises a flat top surface, cylindrical side edge, and internal thread design, enabling mechanical locking with the container through rotation.
18mm Aluminium Screw Cap Material and Structure
Main Material: Made from aluminium alloy (e.g., 8011 alloy), durable, lightweight, and portable, with a premium appearance.
Liner Options:
- EPE (Expanded Polyethylene): Prevents leakage and preserves freshness.
- PE (Polyethylene) or Silicone Rubber: Enhances sealing compatibility with liquids such as oils, pharmaceuticals, or food.
- PTFE (Polytetrafluoroethylene): Used for specialized caps, offering chemical resistance, particularly suited for pharmaceutical applications.
18mm Aluminium Screw Cap Design and Compatibility
- Size: Diameter of 18mm, available in various heights (e.g., 12mm) and thread types (SP410/400, DIN 18) to fit standard glass or plastic bottles.
- Surface Treatment: Brushed or polished aluminium, usually coated for a glossy appearance. Custom colors and decorations (e.g., embossing, lithographic printing) are available.
Special Features:
- Tamper-evident and child-resistant options: Suitable for pharmaceuticals or regulated products.
- Threaded or crimped designs: Compatible with different bottle types.
18mm Aluminium Screw Cap Features
- Material: These caps are made from lightweight, durable aluminium, featuring corrosion resistance and a sleek, professional appearance.
- Diameter: Designed with an internal diameter of 18mm to be compatible with standard 18mm bottle necks, such as DIN18 or GL18 threads.
- Liner: Most 18mm aluminium screw caps are equipped with EPE foam liners. This foam liner ensures a tight seal, preventing leakage and preserving product freshness.
- Surface Treatment Options: A variety of finishes are available, including brushed aluminium, silver, black, and gold. Some styles offer additional features such as knurled edges for enhanced grip or smooth edges for a minimalist look.
- Compatibility: These caps are suitable for a variety of containers, including glass dropper bottles, plastic vials, and mini bottles. They are often used with dropper inserts or internal protective caps to enhance safety.
18mm Aluminium Screw Cap Applications
- Cosmetics: Excellent sealing, suitable for essential oils, serums, or perfumes.
- Food and Beverage: Used for liquids such as food coloring, sauces, or alcoholic beverages, equipped with food-grade liners to ensure safety.
- Pharmaceuticals: Suitable for child-resistant tamper-evident caps for oral medications.
- Industrial: Offers versions with chemical corrosion resistance to meet special storage requirements.
18mm Aluminium Screw Cap Customization and Ordering
- Printing/Embossing: Logos, text, or patterns can be added through lithographic printing, hot stamping, or screen printing.
- Color Options: Silver, gold, or custom shades available.
- Minimum Order Quantity (MOQ): Bulk orders typically require a minimum of 30, 000 to 50, 000 pieces. Some suppliers have no MOQ for small orders.
18mm Aluminium Screw Cap Certification and Compliance
Complies with standards such as ISO 9001, ISO 22000, and CE, ensuring quality and safety for food and medical applications.
Medical-grade liners available for use with sensitive products.
18mm Aluminium Screw Cap Sealing Performance
The internal thread tightly meshes with the external thread of the container, combined with a sealing mechanism on the top (such as an embedded membrane or additional gasket), forming an airtight/liquid-tight barrier to prevent gas permeation or liquid leakage.
Some designs include an additional composite laminated cover layer on the top surface to further block gas diffusion.
18mm Aluminium Screw Cap Advantages
- Durability: The aluminum material is resistant to chemical corrosion and can withstand repeated opening and closing operations, making it suitable for long-term storage needs.
- Compatibility: Fits various container specifications (such as 10–20mL vials); some products support color coding or marking to distinguish different samples.
HC Aluminum Product Recommendations
| Product Name | Feature Description | Applications |
| 18mm Aluminium Screw Cap with EPE Liner | Equipped with EPE liner to ensure excellent sealing performance and leak prevention | General sealing needs such as daily chemical products, health supplements, and small containers |
| 18mm/410 Rolled Edge Aluminium Screw Cap | Rolled edge design with knurled surface to enhance grip | Multipurpose use for personal care products, pharmaceutical packaging, food packaging, etc. |
| 18mm Magnetic Screw Cap with PTFE/Silicone Septa | Equipped with PTFE/silicone septa, magnetic design suitable for laboratory analysis environments, excellent sealing, and chemical resistance | Laboratories, chromatography vials, sample storage, scientific research, etc. |
| 18mm ROPP Aluminium Caps | Tamper-evident ring structure, roll-on pilfer proof design, suitable for 50ml bottles, compliant with beverage industry packaging requirements | Alcoholic beverages, energy drinks, small-dose liquid products, commonly used in the beverage industry |
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