Shrink tunnels are temperature controlled environments used to tighten shrink film that has been applied by a shrink wrapper around products. Conveyor systems move packages through the oven, allowing for an even application of heat.Shrink tunnels are temperature controlled environments used to tighten shrink film that has been applied by a shrink wrapper around products. Conveyor systems move packages through the oven, allowing for an even application of heat.A shrink tunnel is a heated tunnel with a conveyor system running through the tunnel. The heat settings and conveyor speed of the shrink tunnel can be adjusted to heat a shrink film properly. The heat applied to the shrink film enables the film to conform to the product within the film tightly.