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Air Convection Shrink Tunnel


Shrink Tunnel

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. Shrink tunnels serve a variety of industries for retail packaging, food packaging, and industrial packaging.


Shrink tunnels are a great option to help increase production while offering a consistent shrink rate to all products. There are a variety of tunnels and combo sealer sets to choose from. The heat shrink wrap tunnels provided online are to accommodate all ranges of production. Before making a purchase, we recommend reading our blog post about how many products a shrink tunnel can package. We also sell conveyor belts, L-Bar sealers, and I-Bar sealers to work with each shrink tunnel.


Each shrink tunnel has a variety of differences, including speed, chamber dimensions, legs, control panels, and more. Below is a brief description of each tunnel we offer online. Call us for other tunnel heights and widths available.





Recommended Tunnel Settings


Shrink tunnel settings are essential when setting up a new shrink tunnel. The proper settings will allow packages to obtain a consistent professional look. We will go over a brief description of each setting located on the control panel. Optimal settings differ depending on the type and thickness of the shrink wrap being used.


Temperature

This is the internal temperature of the tunnel. The recommended temperature will vary depending on the type of film being used and the thickness of the film. The two most common types of centerfold shrink film used with shrink tunnels are 75 gauge PVC or Polyolefin shrink film. An optimal setting for the PVC shrink film is between 210 - 230 degrees Fahrenheit.  For a 75 gauge polyolefin film, the optimal setting is between 260 - 280 degrees Fahrenheit.


Conveyor Speed

The conveyor speed is often more important than the temperature setting. Many beginners dramatically increase temperature settings when slower conveyor speeds are needed. Setting a new shrink tunnel to the lower end of the recommended heat setting with a slower conveyor speed (1.5-3) will increase the life of the tunnel. If higher conveyor speeds are needed, slowly increase temp. settings until all dog ears and wrinkles are out of the shrink film.


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