Aluminium screw ROPP vodka caps are key components in wine packaging, especially in the high-end spirits market because of their sealing, anti-theft and aesthetics. 28mm and 30mm are common specifications for vodka bottle packaging, especially for glass bottle packaging. Aluminum vodka bottle caps are mainly made of 8011-H14, 3003-H16 and other aluminum alloys, with a thickness of 0.20-0.23mm, and have good deep drawing performance and sealing. The production process includes cold rolling, surface printing (offset printing, hot stamping, etc.) and polymer inner plug matching. Some aluminum bottle caps manufacturers support multi-color printing and logo customization. Choose a suitable cap according to the caliber of the vodka bottle to ensure sealing. Choose a suitable closure design, such as a screw cap, to ensure easy opening.

The common specifications of aluminum screw ROPP vodka caps are mainly based on the diameter of the bottle mouth, material thickness and structural design:

1. 28mm specifications

- Application scenarios: One of the most mainstream specifications, suitable for 500-750ml standard vodka bottles (such as classic bottles produced in Russia and Poland), and also commonly used in domestic liquor and whiskey packaging.

- Structural features: The thread pitch is about 1.5mm, and it is matched with the standard thread design of the glass bottle mouth. The inner plug is mostly made of PE foam or silicone gasket, and the sealing meets the ISO 9001 standard.

- Case reference: This specification is generally used in some series of Absolut Vodka and domestic light bottle wine packaging.

2. 30mm specifications

- Application scenarios: Suitable for large-capacity bottles (1L vodka) or special-shaped bottle designs, commonly used in high-end lines of European and American brands (such as Grey Goose), accounting for about 30% of domestic customized wine caps.

- Process differences: The thickness of aluminum sheet for making vodka bottle caps is mostly 0.22mm (thicker than 28mm), and the surface treatment is often combined with hot stamping or embossing technology to enhance the texture.

3. 26mm specification

- Application scenario: small-capacity (200-375ml) vodka or sample packaging, more common in Japanese and Korean spirits packaging, accounting for about 15% in China.

- Technical points: Due to its small size, the ductility of aluminum is required to be higher, and 8011-H14 aluminum foil is mostly used, and the stamping accuracy must be controlled at ±0.1mm.

4. 32mm/38mm specification

- Application scenario: 1.5L or more large-capacity bottles or barrels of vodka (such as bar-specific packaging), which are non-standard specifications and mainly customized.

- Special design: Most of them are press-screw cap structures (non-threaded), the inner plug has an anti-theft ring, and the opening torque must comply with GB/T 17876-2010 standards.

Material and process-related specifications of aluminium screw ROPP vodka caps:

- Aluminum thickness:

0.20-0.23mm (8011-H14 or 3003-H16 aluminum alloy), high-end customized models can be thickened to 0.25mm (enhanced drop resistance).

- Industry certification:

Food-grade aluminum must pass FDA and LFGB testing, and domestic standards must comply with GB 4806.9-2016.

- Anti-theft design (ROPP cap):

After opening, the bottle cap is partially separated, leaving a visible trace to prevent secondary packaging and improve safety.

- Inner plug type:

PE foam gasket: low cost, suitable for room temperature storage, sealing pressure ≥0.2MPa;

Silicone gasket: high temperature resistant (can be steamed at 121℃), suitable for sterilization process, mostly seen in export vodka packaging;

Anti-counterfeiting inner plug: with tear ring or laser anti-counterfeiting mark, in line with EU EC 1935/2004 regulations.

- Surface treatment process specifications

Printing accuracy: offset printing resolution ≥300dpi, hot stamping foil thickness 3-5μm, UV coating hardness ≥2H;

Customization options: embossing depth 0.1-0.3mm, hollow design requires aluminum elongation ≥5% (to avoid stamping cracking).

Aluminium screw ROPP vodka caps have become the mainstream choice for modern spirits packaging due to their excellent sealing, anti-theft safety, light weight, environmental protection and high customization. Especially in high value-added products (such as vodka and whiskey), aluminum caps can not only guarantee quality, but also enhance brand premium through design.