Metallized PET film is the most commonly used metallized film in China.
So why people choose this kind of film? Please check the below advantages.
1. PET film has high transparency. Its surface tension keeps at 45-50 dynes. So the firmness of the aluminum layer of metallized PET film is very good.
2. Metallized PET film is glossier than other kinds of films. If the film can be stored well, the layer of metal can keep as long as 1 year.
3. Metallized PET film has very good barrier function. It is not only gas barrier, but also oxygen barrier and water vapor barrier. It can be used as a barrier layer for vacuum packaging or inflatable packaging bags.
However, metallized PET film can not be used for retort pouches. This is because the metal layer will peel off after the film is damped.