Why Are Metal Pop Cans Lined With a Plastic Coating?

1. Protection Against Corrosion:

The plastic lining acts as a barrier between the metal can and the acidic contents of the beverage. This prevents the metal from corroding and leaching into the drink, which could potentially alter the taste and cause health risks.

2. Oxygen and Carbon Dioxide Barrier:

The plastic coating helps to maintain the carbonation of the beverage by creating a tight seal that prevents oxygen from entering the can. Oxygen can cause the drink to lose its fizz and deteriorate over time.

3. Flavor Preservation:

The plastic lining helps to preserve the flavor of the beverage by preventing the metal from interacting with the drink. Some metals can react with certain compounds in beverages, leading to off-flavors or metallic taste.

4. Enhanced Shelf Life:

The combination of corrosion protection, oxygen barrier, and flavor preservation contributes to extending the shelf life of canned beverages. This allows manufacturers to distribute their products over longer distances and store them for extended periods without compromising quality.

5. Health and Safety:

The plastic coating ensures that the beverage does not come into direct contact with the metal, reducing the risk of metal contamination. This is especially important for acidic drinks that can leach metals from the can.

6. Recycling:

The plastic lining does not significantly affect the recyclability of metal cans. Most recycling facilities are equipped to handle both lined and unlined cans.

Overall, the plastic lining in metal pop cans plays a crucial role in maintaining product quality, safety, and shelf life while minimizing interactions between the beverage and the metal.