In the liquor packaging industry, bottle caps are not only essential sealing components offering leak prevention, tamper evidence, and product integrity, but also key in enhancing brand identity and market recognition. With advances in plastic material technology, plastic liquor bottle caps are now widely used across various alcoholic beverages due to their excellent processability, cost-efficiency, and versatile designs.
HAOMEI Aluminum produces high-quality plastic liquor bottle caps using food-grade materials, combining advanced injection molding and anti-counterfeiting technology. Our caps are widely applied to baijiu, wine, yellow rice wine, fruit wine, and other types of alcohol packaging.
Plastic bottle cap production process
The production process of plastic bottle caps is divided into compression molding and injection molding.
| Injection Molding | Injection molding is currently the most widely used production process for plastic bottle caps, and is particularly suitable for bottle cap products with complex structures, multiple surface patterns, and the need for multi-color injection molding or insert injection molding. |
| Compression Molding | Compression molding is mainly used to produce standard bottle caps (such as beverage bottle caps) or products with relatively simple structures and high production requirements. |
Tamper-Evident Plastic Cap Materials
Polypropylene (PP)
A widely used thermoplastic resin featuring good heat resistance and chemical stability.
Advantages:
Low density
High-temperature resistance
No deformation
High surface strength
Non-toxic, chemically stable
Limitations:
Low toughness at low temperatures (brittle)
Poor wear resistance
Susceptible to oxidation
Application: Commonly used for caps of baijiu, yellow wine, and other bottled liquors. One of the most widely used cap materials.
Polyethylene (PE)
Available in HDPE and LDPE, known for flexibility and excellent performance under low temperatures.
Advantages:
Excellent flexibility – suitable for press-fit caps and inner liners
Strong low-temperature resistance – ideal for cold chain logistics
High chemical stability – resistant to alcohol corrosion
Application: Often used for wine and fruit wine sealing systems, or as part of the internal sealing structure.
Plastic Bottle Cap Specifications
| Materials | PP / PE / ABS / Composite materials |
| Diameter Sizes | 18mm / 28mm / 30mm / 35mm / Customized |
| Height Range | 18mm – 60mm (customizable) |
| Printing Techniques | Silk screen, hot stamping, laser engraving, UV printing |
| Tamper-evident Types | Break-off ring, tamper strip, laser code, etc. |
| Food-Grade Certifications | GB 4806.7, SGS, FDA |
| Packaging | Pallet; Carton; Pallet + Carton; As per customer request |
| MOQ | 50,000 pieces |
Anti-Counterfeit Cap Structure Design
Outer Cap Layer: Customizable with matte, glossy, electroplating, or metal-coated finishes for a premium look and feel
Inner Plug Layer: Ensures strong bottle-mouth sealing, preventing alcohol evaporation
Liner Options: Available with EPE, aluminum foil, or food-grade silicone liners for enhanced sealing
Tamper-Evident Features: Supports break rings, laser codes, tear strips, holograms, QR code labels, and more
Product Advantages
Excellent Sealing Performance: Precision molds ensure tight bottle-to-cap fit, effectively blocking oxygen, CO₂, and external contaminants, reducing leakage and evaporation, and extending shelf life.
Diverse Customization Options: Tailored color options, logo printing, hot-stamped designs, cap height, surface textures, and more to meet branding needs.
Comprehensive Tamper-Evident Features: Laser coding, tamper strips, non-reopenable structures, and embedded anti-counterfeit labels protect brand integrity and support regulatory compliance.
Eco-Friendly and Recyclable: Made with environmentally safe plastics, fully recyclable, and aligned with sustainable packaging trends.
High Compatibility: Suitable for glass bottles, plastic bottles, and ceramic bottles, adaptable to cold filling, hot filling, and vacuum filling processes.
Cost Efficiency: Plastic caps are more cost-effective and efficient to produce than metal (e.g., aluminum) caps, ideal for mass production.
Application Fields
Liquor packaging: Baijiu, fruit wine, herbal/health wine
Wine sealing systems: For red wine and other bottled products
Gift box custom liquor packaging
Export alcohol packaging caps
HAOMEI Aluminum has rich packaging experience and has aluminum plate workshops, printing and cap production workshops. We produce high-quality aluminum caps, plastic caps, aluminum-plastic combination caps, aluminum closure, various liner caps, special-shaped caps, crystal caps, crown caps and aluminum printing plates, etc. Our products are exported to many countries overseas and are highly trusted and supported by customers. We provide sample services, factory direct sales, price advantages, and customers can consult at any time.
