Level 2 PE Bag Sealing Security Film
This is 50 microns HDPE film with hidden message and heat tampering feature and it is specially designed to use on tamper evident bag coated with hot melt glue.
If an unauthorized opening occurs, the tape imprint message will reveal and show the evidence of tampering. It deters stolen and manipulation.
Besides, when heat the tape white line, it will change color from white to red and the transition is permanent even though the temperature returns to normal.
Since HDPE security film is easier to heat cut than PET security film, most packing bag manufacturers use it to seal bags using a bag-making system.