Cling film is also known as plastic wrap, Saran wrap, or food wrap， it is thin plastic wraps used for sealing food items to keep them fresh. These wraps are made from different materials, such as polyvinyl chloride (PVC), low-density polyethylene (LDPE), and polyvinylidene chloride (PVdC). Manufacturers use these materials to create different types of cling films with varying levels of thickness, clarity, and clinginess.

Manufacturers use different production techniques, such as blown film extrusion and cast film extrusion, to create cling films from these materials. Blown film extrusion involves blowing air into a tube of molten plastic to create a thin film. Cast film extrusion, on the other hand, involves pouring molten plastic onto a polished metal surface and then cooling it to form a film.