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A Shrink tunnel or Heat tunnel is a heated tunnel mounted over or around a conveyor system. Items such as packaging, have shrink film loosely applied; with heat, the film shrinks to fit snugly around the wrapped object.[1] Contents 1 Uses 2 Types 3 See also 4 References Uses Shrink labels Combining small items for sale and display (example: bottled water) Tamper resistant or Tamper-evident bands or seals Form large unit loads for transport Form primary barrier on foods such as cheese, meats and fish Skin packs Types The heat source can be based on Heating element (electrical resistance), Infrared heater, steam, or gas flame. Often forced air is used to improve convection, sometimes focusing the heat on one component of the item. Tunnels are available with or without a conveyor system. Some are built into a production line or are integral with machinery that also applies the shrink film. Others are movable by hand or by castors. A shrink tunnel, referred to as an oven, may be equipped with an integrated conveyor of two different kinds. The roller conveyor or the belt conveyor. Roller conveyors can be used with polyolefin, PVC, and shrink polyethylene films. The space in between the rollers is filled with hot air from the bottom of the tunnel to shrink the film layer around the object, creating a sealed package. When used with polyolefin and PVC based films the rollers are called "live" or spinning. When used with polyethylene films the rollers are called "dead" or not spinning. The tunnels with Teflon mesh belts and polymer mesh belts are used for smaller packages, or when the package may have an instability and need a stable platform.[2] Some heat shrink tunnels have two or more zones for heating and controlled cooling. See also Heat gun References ^ Soroka, W (2008). Illustrated Glossary of Packaging Terms. Institute of Packaging Professionals. p. 33. ISBN 1930268270.  ^ shrink tunnel information Soroka, W, "Fundamentals of Packaging Technology", IoPP, 2002, ISBN 1-930268-25-4 Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6 v · d · ePackaging Packaging topics Active packaging · Child-resistant packaging · Food packaging · Package testing · Packaging engineering · Shelf life · Package pilferage · Pharmaceutical packaging · Tamper-evident · Tamper resistance · Wrap rage Packages Aluminum can  · Aluminum bottle  · Ampoule  · Antistatic bag · Barrel  · Blister pack · Bag-In-Box · Bottle · Box · Bulk box · Carton · Chub (container) · Clamshell (container) · Corrugated box design  · Carboy · Crate · Drum (container)  · Envelope  · Flexible intermediate bulk container · Folding carton · Insulated shipping container · Intermediate bulk container  · Jar · Juicebox (container) · Keg  · Multi-pack  · Plastic bag · Plastic bottle  · Pail (container) · Popcorn bag · Retort pouch · Sachet (package) · Self-heating can  · Self-heating food packaging · Shipping container · Skin pack · Steel can  · Tube (container)  · Unit load · Wooden box Materials and components Adhesive · Aluminum foil  · BoPET · Bubble Wrap · Cellophane · Closure (container) · Corrugated fiberboard · Cushioning · Glass · Corrugated plastic · Coated paper · Foam peanut · Hot-melt adhesive · Label · Linear low-density polyethylene · Liquid packaging board · Low-density polyethylene · Metallised film · Modified atmosphere · Molded pulp  · Nonwoven fabric · Overwrap · Oxygen absorber · Packaging gas · Pallet · Paper · Paper pallet  · Paperboard  · PET film (biaxially oriented) · Plastic wrap · Polyester · Polyethylene  · Polypropylene · Pressure sensitive tape · Screw cap · Shrink wrap · Slip sheet  · Security seal · Security printing · Strapping · Stretch wrap · Time temperature indicator · Tinplate · Velostat Processes Aseptic processing · Authentication · Automatic identification and data capture · Blow fill seal  · Blow molding · Calendering · Containerization · Die cutting (web) · Electronic article surveillance · Extrusion · Extrusion coating · Graphic Design  · HACCP  · Induction sealing · Injection molding · Molding (process) · Papermaking · Plastics extrusion · Plastic welding · Printing · Quality assurance  · Radio-frequency identification · Track and trace · Vacuum forming · Ultrasonic welding · Verification and validation · Machinery Barcode printer · Barcode reader · Bottling line · Cartoning machine · Check weigher · Conveyor system · Extended Core Stretch Wrapper · Heat gun · Heat sealer · Industrial robot · Injection molding machine · Logistics automation · Material handling equipment · Mechanical Brake Stretch Wrapper · Multihead weigher · Orbital Stretch Wrapping · Palletizer · Rotary Arm Stretch Wrapper · Rotary wheel blow molding systems · Shrink tunnel · Staple gun · Tape dispenser · Vertical form fill sealing machine · Turntable Stretch Wrapper Environment, post-use Biodegradation · Glass recycling · Plastic recycling · Environmental engineering · Industrial ecology · Life cycle assessment · Litter · Paper recycling · Reuse · Recycling · Source reduction · Sustainable packaging · Waste management