1. Structural Design Features

• Ergonomic Pull-Tab: Equipped with a curved pull-tab (diameter 18-22mm) that fits the contour of fingers, requiring a pulling force of only 8-12N for easy opening—suitable for all age groups, including the elderly and children.

• Precision Score Line: A pre-formed score line (depth 0.15-0.2mm, width ≤0.3mm) is pressed around the lid’s opening area, ensuring consistent tearing force and preventing incomplete opening or lid deformation during use.

• Leak-Proof Seal Rim: The lid’s edge features a 360° rolled seal rim with a thickness of 0.4-0.6mm, which tightly fits the bottle/can neck to form an airtight seal, effectively blocking oxygen and moisture penetration.

2. Material & Safety Features

• Food-Grade Coating: The inner surface of the lid is coated with a food-safe epoxy resin layer (thickness 8-12μm) that meets FDA and EU EC 1935/2004 standards, preventing direct contact between metal and food/beverages and avoiding taste contamination.

• High-Strength Base Material: Made of 5052 aluminum alloy (thickness 0.25-0.35mm) or 304 stainless steel (thickness 0.2-0.3mm), offering excellent impact resistance and pressure resistance—able to withstand internal pressures of up to 0.3MPa (suitable for carbonated drinks).

• Corrosion Resistance: The outer surface undergoes electrolytic oxidation treatment, forming an oxide film (thickness 5-8μm) that resists rust and discoloration, even in humid environments or when in contact with acidic beverages.

3. Application & Compatibility Features

• Wide Size Range: Available in diameters from 52mm (for small cans) to 165mm (for large bottles), compatible with various packaging formats such as beverage cans, food cans, and dairy bottles.

• High-Temperature Resistance: Can withstand pasteurization temperatures of 85-95℃ for 15-30 minutes without coating peeling or structural damage—ideal for heat-treated products like canned fruits and sterilized milk.

• Recyclable Material: The aluminum/stainless steel base material is 100% recyclable, with a recycling rate of over 90%, aligning with global environmental protection and sustainable packaging trends.

4. Functional Extension Features

• Tamper-Evident Design: A small tamper-evident tab is connected between the pull-tab and the lid body; once opened, the tab detaches, allowing consumers to easily identify if the product has been opened or tampered with.

• Printable Surface: The outer surface supports high-definition offset printing (up to 6 colors) and UV curing, enabling custom logos, brand patterns, or product information printing—enhancing brand recognition and product aesthetics.

• Lightweight & Space-Saving: With a single lid weight of only 3-8g, it reduces overall packaging weight and transportation costs; flat-shaped lids are stackable, saving storage space compared to irregularly shaped closures.