Gas barrier

A gas barrier is a material or layer that prevents gases, such as oxygen, moisture, or carbon dioxide, from passing through a package or container. It helps protect products from spoilage, oxidation, or contamination by controlling the exchange of gases with the environment. Gas barriers are commonly used in food packaging, pharmaceuticals, and electronics to maintain freshness, extend shelf life, and ensure product integrity. The effectiveness of a gas barrier depends on the material’s properties, such as density, thickness, and specialized coatings, which together create a sturdy shield against unwanted gas transfer.