Once the product is wrapped by heat shrink machine, the plastic film around it has to be shrink to complete the process. Shrinking of the film can be achieved through a number of methods which depending on application may range from hand held gas or electric hot air blowers, to fully automated room size ovens.However, the best results are obtained through the use of a Shrink Tunnel.

heat shrink machine, is simply a recirculated hot air chamber sitting on top of a conveyor which carries the product through the chamber. The essential requirements for a good shrink tunnel are a constant yet adjustable air temperature and conveyor speed, symetrical air circulation pattern.

As pre-wrapped product is transported through the hot chamber the film temperature raises and the film shrinks to conforms to the shape of enclosed product. At that stage the film is not strong enough to compress the contents.

When the pack emerges from the hot chamber the film cools and shrinks a little more, tightening the pack into a stable, easily handled unit.
The degree of final compression is determined mainly by the thickness and type of film used.

Shrink packaging has been proven and well established for over three decades. Due to its fast process, practical and cost affective advantages, because of the cost effectiveness heat shrink machine is using in various industries for there packaging.