HAOMEI Aluminum produces high-quality 31.5mm aluminum screw caps using ROPP (Roll-On Pilfer-Proof) technology. The surface of each cap can be customized with printed logos, brand graphics, QR codes, etc., making them widely used in premium bottled products such as wine, olive oil, spirits, and pharmaceuticals.
Common Sizes:
31.5 × 18 mm
Custom sizes available upon request.
HAOMEI Aluminum – Multiple Printing Techniques
Embossed Printing (Relief Effect):
3D logos or patterns are stamped onto the top or side of the cap using precision molds, enhancing brand recognition (commonly used in liquor packaging).Roll Printing (Curved Surface Printing):
Ideal for continuous patterns around the cap skirt. Machines like the BTV900 knurling printer can perform cutting and printing simultaneously.Multicolor Flat Printing:
Supports full-color printing of logos, texts, and intricate designs. Integrated with CCD120 embossing equipment for precise alignment between print and embossing.
Customization Options
Color:
From single-color to full-color printing. Natural metallic silver is standard, with optional gold, red, black, or other spot colors.Foil Stamping / Laser Effects:
Common in luxury wine and spirit packaging to enhance shelf appeal.Design Placement:
Top (main logo), side (product info, anti-counterfeit codes), all customizable.Security Features:
Hidden graphics, laser coding, security threads, etc.Liner Materials:
Options include PE foam liners, grinding discs, aluminum foil liners, or molded liners from plastic particles.
31.5mm Aluminum ROPP Cap Specifications
| Size | Diameter 31.5mm; common heights: 18mm, 24mm, etc. |
| Material | Food-grade 8011 aluminum alloy, deep-draw capable |
| Type | Screw cap |
| Decoration Techniques | Side printing, screen printing, hot stamping (gold/silver), embossing |
| Liner | PE liner, grinding disc, foil liner, molded plastic liner |
| Tamper-Evident Structure | Easy-tear safety ring ensures visible first-opening |
| Surface Finish | Coatings available in metallic, matte, or glossy finishes, with brand logo printing |
| Printing Capabilities | Custom designs, QR codes, batch numbers, enhancing brand identity and anti-counterfeiting |
| Applications | Wine, olive oil, vegetable oil, spirits, pharmaceutical glass bottles |
| Samples | Available |
| OEM & ODM | Accepted |
| Packaging | Cartons + pallets |
| Origin | Zhengzhou, China |
| Delivery Time | 20-30 days |
| Payment Methods | T/T, L/C, Western Union, etc. |
| MOQ | 80,000 pieces |
Applications of 31.5mm ROPP Cap
Alcoholic Beverages: Wine, spirits
Olive Oil Bottles
Beverages: Juice, water, carbonated drinks
Pharmaceutical Packaging
Chemical Containers
Packaging & Shipping
Standard Packaging:
Carton + plastic bag for dust protection; inner dividers to prevent scratchesQuantity:
2,000 to 5,000 caps per carton, depending on cap height and thicknessDelivery Time:
10–20 days depending on order volume and printing requirements
FAQ
Q1. Can I get samples?
A1. Yes, free samples are available for stock items. Shipping costs are borne by the customer.
Q2. Do you offer printing services?
A2. Yes, we offer both screen and hot stamping printing. We accept files in PDF, AI, CAD, and other common formats.
Q3. What is the delivery time?
A3. Sample delivery for new designs is 20–25 working days. Bulk production takes up to 30 working days after deposit. Exact time depends on order quantity.
Q4. How can I get a quote?
You need to provide the order quantity per batch/year, and a detailed drawing containing the following information:
a. Material b. Color/Surface Treatment c. Capacity d. Weight
