POF is an abbreviation for polyolefin and generally refers to heat shrinkable
Various machines are used, from simple heat guns to conveyor driven heat shrink tunnels.
The product, volumes and purpose dictate the appropriate solution.
There are many ways of sealing the pack from a simple bar sealer, an L sealer and on to the automated
machines like continuous side seal and flow wrappers.
Shrink film is often folded and then rolled so that when the roll is unwound, it has an open and a closed side. This is done to improve the packing efficiency when using an L sealer.
This is simply a roll of film wound in a single layer. This is used for
flow wrapping machines or many other
The simple answer is yes. It is advisable to do this on volume lines, though.
Generally POF shrinks at around 150 degrees C. It is important to understand that the heat of the tunnel,
the length of the tunnel, the speed through the tunnel and the type of pack being covered all need to be
controlled to get the perfect shrink.
Not for the film, the ventilation needs to be appropriate for the heat tunnel though.
Generally speaking, the heavier the item being packed, the thicker the film.
The film is sticky on one side. The board needs to be porous so the vacuum can form the film around the
item and stick to the board.