Shrink film, is a material made up of polymer and the process of applying heat to this material thus making it shrink tightly over any product is known as shrink wrapping. It is commonly used in semi or fully automatic machines Shrink wrap is commonly used as an over wrap on many types of packaging, including cartons, boxes, beverage cans and pallet loads. It is also very light weight and therefore it does not contribute much to the weight of the packed product.