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December 15, 2016

Stretch Film Terms 1-1

Cast Stretch Film- A stretch film derived from the cast extrusion process. Less manufacturing costs allow cast stretch film to be the more widely used stretch film.


Blown Stretch Film- A stretch film derived from the blown extrusion process.


Bottom Wraps- The wraps a stretch wrap machine uses to apply film to the bottom section of the load. Forming a strong bottom wrap will help to ensure load stability.


Cling- Allows the film to stick to itself and not the product. Some films have one sided cling and others have two sided cling.


Co-extrusion- Extruding two or more materials through a single die to enable the two materials to merge together.


Dart Drop- A commonly used test to measure puncture strength of stretch film. It is conducted by dropping a semi-circular shaped object onto the film.


Elastic Recovery-The ability of stretch film to recover to its original shape after being stretched.


Elmendorf Tear- Another common test used for stretch film and other products to measure tear resistance.


Extruder- Equipment used to change solid polymers into molten polymers.


Film Feed- In a stretch wrap machine, it is the speed at which stretch film is supplied to the load.




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