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Glossary of Packaging Terms

Air-Flow: Air-Flow is used in agricultural product packing and has die cut holes to reduce spoilage and ensure even cooling. Air-Flow replaces pallet netting and gives users all the advantages of conventional LLDPE Pallet Stretch Wrap, which include strength, load holding and ease of use.
Ambidextrous Control: Separate right/left hand braking control which allows the operator to have total stretch control over 100% of the surface area of the stretch film while wrapping.
Angel Hair: Thin strands of stretch film on the edges of stretch film rolls caused by improper bologna slicing.
Auto Bander: Jumbo rolls of stretch film for automatic bundling equipment.
Banding/Bundling: Wrapping several items together with plastic stretch wrap.
Barricade Tape: Non-adhesive warning films printed with custom logos.
Base Lock: The thick layer of film produced by holding the Western Plastics handwrappers at approximately a 45 degree angle to the floor. This wrap helps lock the boxes to the skid to prevent shifting.
Blooming: The time period that the Poly Iso Butylene takes to migrate to the surface of the stretch film. Once this happens high cling films are at their peak of perfection.
Blown Film: The fabrication of a film by continuously pumping the polymer through a circular die and filling the tube with air. The volume of air contained within the tube stretches the tube out to the desired width and, in conjunction with the rate at which it is bring pulled away from the die, the desired thickness is created.
Bologna Slicing:

A film slitting process in which a rotating double edge blade cuts a roll of film while the roll is spinning. This is the quickest way for slitting film. However, the quickness can cause the film to melt in some places, resulting in the film hanging up and tearing it, as it is unwound off the roll.

Braking Tension: The tension applied to stretch film by pulling and squeezing the patented Western Plastics hand brakes (See Finger Tip Control).
Bulk heading: A shipping technique that combines both unitization and stabilization. The pallet loads nearest the back door of a truck are unitized while the pallet loads towards the front of the trailer are stabilized.
Bundling: Banding articles together into distinct and separate units with plastic stretch film.
Cast Film: The fabrication of a film by continuously pumping the polymer through a straight slot die, then chilling this hot plastic immediately through contacts with a chilled roll. Film width is determined by how fast the chill roll pulls the film away from the die.
Cling: The characteristic of stretch film which makes it stick to itself.
Cross Top Wrapping: A unitization technique which covers the top of a load. Not only does cross top wrapping protect the tops of pallet loads but it also helps to pull the load together as it settles during shipment.
Cube: The total area inside a truck trailer. The length times width times the height of the trailer is the cube space.
Dead Fold: Stretch film sticking to itself during wrapping without the use of any additional heat sealing (i.e. – PVC films used in food wrapping have high dead fold).
Die: A device used in extrusion processes to shape the extrudate.
Double Stacking: One pallet piled on top of another during shipping. All of Western Plastics products packaged four rolls per case are specially wrapped, using the techniques in this manual, to permit double stacking in shipment and storage.
Eco-Wrap: Micron Pallet Wrap. Stiffer and stronger than conventional hand wrap. Has a high resistance to stretch for superior load retention.
EVA (Ethylene Vinyl Acetate): A copolymer put in stretch film adding strength to ordinary polyethylene film.
Extruder: A machine that makes stretch film. It consists of a large steel barrel surrounded by heaters, which melt the plastic resin pellets. Inside of the barrel is a large screw to force the liquid plastic under pressure through a die to be made into plastic sheeting by either the cast or blown processes.
Film Supply: The amount of film on a Western Plastics roll.
Fingertip Control: Stretch film tension control that is at the operator’s finger tips, providing the operator with control that can always be felt and adjusted instantaneously. When very little pressure is applied to the Western Plastics handbrakes, the film can be stretched up to 25%. When an intermediate amount of pressure to applied to the hand brakes, the film can be stretched up to 50%. When firm finger tip pressure is applied to the hand brakes, then the film can be stretched up to 100% and more.
Five Sided Wrapping: Wrapping a pallet load’s four sides plus the top. The top of a pallet can be wrapped by using the cross top wrapping technique.
Flange: The extended lip of the hand brake that keeps the operator’s hand from sliding down and rubbing against the roll.
Flexible Hand Brakes: The key to fingertip control and Western Plastics patented braking system. Inside the hand brakes are specially designed wear pads that dissipate heat and provide the proper tensioning when squeezed for maximum film stretch. By squeezing them, the operator can get 50% to 100% or more stretch when he pulls the film. Not only do grips give the operator a feel of how much pressure he is applying to the film, but they protect his hands – keeping them from burning or blistering.
Floor Loading: A technique used for packing a truck in which pallets and stretch film are not used. Hand carrying (conveyors are frequently used) a load on a truck and shipping the load by leaving it on the trailer floor unprotected.
Gauge: The thickness of a film. 80 gauge film equates to .8 mil or .0008 inches.
Gauge Band: Thickness irregularity in films.
Gel: Small piece of undissolved resin causing imperfection in film.
HandyWrap: Pallet stretch wrap with disposable extended core handles.
High Density Load/Product: A load or product that is relatively heavy (i.e. – an engine block on a pallet).
Identi Film: Pallet stretch film in colors. Tinted films give protection from tampering and theft. Improves load appearance, product rotation.
Laundry Wraps: All purpose PVC over wrap for use in commercial laundries.
LDPE or PE (Low Density Polyethylene): A resin base for making stretch film. Even though LDPE is a relatively strong transparent film with good tensile strength it does not match the performance of the newer LLDPE.
Maximum Stretch: The ability of the film to stretch as far as it can without tearing. Western Plastics uses premium grade films that can stretch 100, 200 percent, and more.
Memory: After the Western Plastics film is stretched to its maximum it will recover and form fit the load which has been wrapped (See recovery).
Mini-Bander: Similar to EZ-Bander banding film expect on 1 inch diameter cores for better wrapping control and ease of use in working environments.
Neck Down: The narrowing tendency of stretch film when being stretched or pulled.
PVC: Poly Vinyl Chloride. In film form, it is used as a meat or produce wrap as stretch film, and a high clarity shrink wrap for retail packaging.
Recovery: Stretch film trying to return back to its original form after it has been stretched. This action constantly pulls the load together since the stretch film tightly form-fits the load. Stretch wrapping continues to tighten the load as it settles during shipment, due to the recovery property, keeping the load safe and secure during shipment.
Securi-Wrap: Opaque pallet stretch film. Opaque film blocks UV rays from damaging products. Protects shipments during transit by not allowing contents to be seen.
Strong-Bow: Pre-stretched pallet wrap. Film has been stretched leaving better load retention and lighter weight rolls
Tacifier: A general term used to refer to cling additives in stretch film (see blooming, cling, poly isobutylene).
Tensile Strength: The maximum longitudinal stress that stretch film can take before it tears.
Top Sheeting: A protective covering put on the top of a load to protect the top from dust, dirt, and other objects that might damage the load. Western Plastics manufactures a top sheeting dispenser and top sheeting rolls for protecting tops of loads, open containers, etc.
Unitization: Wrapping techniques that protect a pallet load from top to bottom, making all packages in the load one single unit. These techniques are ideal for long distance hauls and less than truckload shipments. X-wrapping, Wrapping Low, and Cross Top Wrapping are wrapping techniques that promote the best unitization.
WrapNet: Netting pallet wrap. Knitted pallet wrap that hold load together but also allows air to circulated throughout the pallet.
Yield: The amount of stretch a film gets without interfering with the performance of other properties like tear and puncture resistance.

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