Impulse sealing is a method used to seal plastic bags and other materials by applying heat to create a strong bond. This process involves using an impulse sealer, which generates a quick burst of heat through a wire or band. When the material is pressed against the heated element, it melts slightly, allowing the two surfaces to fuse together once cooled. This sealing technique is commonly used in packaging industries for items like food, electronics, and medical supplies. Impulse sealing is efficient and ensures airtight seals, helping to preserve the freshness of products and protect them from contamination.