Overwrap

An overwrap or wrap is applied over an item or is applied over another form of packaging. It is often made of plastic film (sometimes called Polywrapping) or paper.[1]

overwraps of frozen meat

Functions

An overwrap can have several purposes or functions:

Combine two or more smaller packages into a larger multi-pack
Keep a package or item clean
Help prevent package pilferage or premature opening of the package
Help provide a tamper indicating seal
Help keep insects out of a package[2]
Obscure a package for distribution, sale, or gifting
Help provide an authentication seal
Help provide grease resistance or water resistance
Keep an item, such as magazines, clean and intact during shipment; provide an address label that does not damage the item
Provide graphics, advertising, warnings, instructions, bar codes, etc.

Types of overwraps

Shrink wrap

Shrink wrap is a material made up of polymer plastic film. When heat is applied it shrinks tightly over whatever it is covering. Heat can be applied with a hand held heat gun (electric or gas) or the product and film can pass through a heat tunnel. Most shrink films are polyethylene.

Film wrap

Plastic films, usually polyethylene or polypropylene, can be wrapped around an item and attached with adhesive, PSA tape, or heat seals. Sometimes the film is in the form of a plastic bag which is sealed around the item.

Decorative wrap

Paper wrap

Kraft paper and a variety of other papers can be used to overwrap items in a package or to overwrap a package. Some papers provide abrasion protection for packaged items. Sealing can be by adhesive, tapes, heat seals, etc. Some papers also have grease resistance or are saturated with volatile corrosion inhibitors, etc.

References

Soroka, W. Illustrated Glossary of Packaging Terminology (Second ed.). Institute of Packaging Professionals.
Cooke, Linda (March 1998), "Pest-Proofing Food Packaging" (PDF), Agricultural Research

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

Packaging
General topics	Active packaging Child-resistant packaging Contract packager Edible packaging Modified atmosphere/modified humidity packaging Package pilferage Package testing Package theft Packaging engineering Resealable packaging Reusable packaging Reuse of bottles Shelf life Shelf-ready packaging Shelf-stable Sustainable packaging Tamper-evident Tamper resistance Wrap rage
Product packages	Alternative wine closure Beer bottle Box wine Case-ready meat Coffee bag Cosmetic packaging Currency packaging Disposable food packaging Drink can Egg carton Evidence packaging Field ration Flour sack Foam food container Food packaging Fuel container Gas cylinder Glass milk bottle Growler Juicebox Low plastic water bottle Luxury packaging Milk bag Optical disc packaging Oyster pail Popcorn bag Pharmaceutical packaging Plastic milk container Sand bag Self-heating food packaging Screw cap (wine) Single-serve coffee container Water bottle Wine bottle
Containers	Aerosol spray Aluminium bottle Aluminum can Ampoule Antistatic bag Bag-in-box Bag Barrel Biodegradable bag Blister pack Boil-in-bag Bottle Box Bulk box Cage Case Carboy Carton Chub Clamshell Corrugated box design Crate Disposable cup Drum Endcap Envelope Flexible intermediate bulk container Folding carton Glass bottle Gunny sack Inhaler Insulated shipping container Intermediate bulk container Jar Jerrycan Jug Keg Mesh bag Multilayered packaging Multi-pack Packet (container) Padded envelope Pail Paper bag Paper sack Plastic bag Plastic bottle Retort pouch Sachet Squround Security bag Self-heating can Shipping container Skin pack Spray bottle Stand-up pouch Steel and tin cans Tetra Brik Thermal bag Tub (container) Tube Unit load Vial Wooden box
Materials and components	Adhesive Aluminium foil Bail handle Bioplastic Biodegradable plastic BoPET Bubble wrap Bung Cellophane Closure Coated paper Coating Coextrusion Corrugated fiberboard Corrugated plastic Cushioning Desiccant Double seam Flip-top Foam peanut Gel pack Glass Hot-melt adhesive Kraft paper Label Lid Linear low-density polyethylene Liquid packaging board Low-density polyethylene Metallised film Modified atmosphere Molded pulp Nonwoven fabric Overwrap Oxygen scavenger Package handle Packaging gas Pallet Paper Paper pallet Paperboard Plastic-coated paper Plastic film Plastic pallet Plastic wrap Polyester Polyethylene Polypropylene Pressure-sensitive tape Pump dispenser Screw cap Screw cap (wine) Security printing Security tape Shock detector Shock and vibration data logger Shrink wrap Slip sheet Staple (fastener) Strapping Stretch wrap Susceptor Tamper-evident band Tear tape Temperature data logger Time temperature indicator Tinplate Velostat
Processes	Aseptic processing Authentication Automatic identification and data capture Blow fill seal Blow molding Calendering Canning Coating Containerization Converting Corona treatment Curtain coating Die cutting Die forming (plastics) Electronic article surveillance Extrusion Extrusion coating Flame treatment Glass production Graphic design HACCP Hermetic seal Induction sealing Injection moulding Lamination Laser cutting Molding Package tracking Papermaking Plastic welding Plastics extrusion Printing Product development Production control Quality assurance Radio-frequency identification Roll slitting Shearing (manufacturing) Thermoforming Track and trace Vacuum forming Ultrasonic welding Vacuum packaging Verification and validation
Machinery	Barcode printer Barcode reader Bottling line Calender Can seamer Cartoning machine Case sealer Check weigher Conveyor system Drum pump Extended core stretch wrapper Filler Heat gun Heat sealer Industrial robot Injection molding machine Label printer applicator Lineshaft roller conveyor Logistics automation Material-handling equipment Mechanical brake stretch wrapper Multihead weigher Orbital stretch wrapper Packaging machinery Palletizer Rotary wheel blow molding systems Shrink tunnel Staple gun Tape dispenser Turntable stretch wrapper Vertical form fill sealing machine
Environment, post-use	Biodegradation Environmental engineering Glass recycling Industrial ecology Life-cycle assessment Litter Packaging waste Paper recycling Plastic recycling Recycling Reusable packaging Reverse logistics Source reduction Sustainable packaging Waste management
Category: Packaging

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