Heat is applied to the film – by either a conveyor heat tunnel or an electric or gas heat gun – which catalyzes the film to shrink tightly around the item placed within.
Polyolefin shrink film is used for almost every kind of application. Essentially, it is used to protect and package a single product, or to bundle multiple products together. It is particularly favoured for packaging less rigid items such as foodstuff, stationery, cards and electronic items.