Bubble wrap (also known as bubble film, air cushion bag, or bubble packaging, commonly called “Bubble Wrap” in English) is a packaging material made from low-density polyethylene (LDPE) pellets. Its distinctive structure consists of a flexible plastic sheet with small, evenly distributed air pockets (bubbles) inflated across the surface. These air pockets act as a perfect cushioning layer, absorbing external impact and ensuring the safety of the goods inside.