WHAT DOES POF MEAN?
POF is an abbreviation for polyolefin and generally refers to heat shrinkable shrink film.
WHAT EQUIPMENT IS NEEDED TO SHRINK POF?
Various machines are used, from simple heat guns to conveyor driven heat shrink tunnels. The product, volumes and purpose dictate the appropriate solution.
HOW IS THE SHRINK FILM SEALED?
WHAT IS A CENTREFOLD ROLL?
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.
WHAT IS SINGLE WIND OR LAY FLAT?
This is simply a roll of film wound in a single layer. This is used for flow wrapping machines or many other automated machines.
CAN I PRINT ON POF?
The simple answer is yes. It is advisable to do this on volume lines, though.
WHAT TEMPERATURE DOES POF SHRINK AT?
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.
DO I NEED SPECIAL VENTILATION FOR POF?
Not because of the film. The ventilation needs to be appropriate for the heat tunnel though.
HOW THICK MUST THE SKIN PACK FILM BE?
Generally speaking, the heavier the item being packed, the thicker the film.
HOW DOES THE SKIN PACK FILM STICK TO THE BACKING BOARD?
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.