Plastic pilferproof closure is the most commonly used encapsulation, especially in the field of beverage and drink.

According to its usage, we could divide it into with and without pressure closures. Plastic pilferproof closures are mainly produced with polyolefin by injection molding, hot pressing and other techniques.

Plastic pilferproof closures should be easy to open by consumers and can avoid leakage due to bad airproof character.

To manufacturers, the reasonable airproof character control for plastic pilferproof closure is the key-testing item on-line and off-line.