The aluminum film(VMPET film) is a thin layer of aluminum (about 300 nm) deposited on the substrate by vacuum deposition. Generally not used for cooking sterilization bags.
There are two reasons:
1 general aluminum film (VMPET film) can not withstand high temperature sterilization temperature, high temperature in the aluminum layer will be oxidized black.
2 The adhesion of the aluminized film (VMPET film)is poor and the peel strength can not meet the requirements of the cooking bag.
The difference between aluminum bag (VMPET bag) and aluminum foil bags
1) barrier properties, aluminum bags (VMPET bag)than aluminum foil bags to be worse, because the aluminum foil inside the aluminum film (VMPET film) barrier properties than aluminum foil is worse.
2) Vacuum applications
Aluminum foil bags can be used in a large number of vacuum applications, such as grade, beef, donkey, duck tongue, etc., and aluminum packaging bags (VMPET bag)are rarely used in the vacuum. For reasons, see the video tutorial.
3) aluminum foil bags can be liquid packaging, such as Wangwang suction ice, fruit juice, beverages and so on, but the aluminum bag (VMPET bag)is almost not used for liquid packaging.
4) Media contents
Packaging anti-media products, aluminum foil bags a large number of applications, while the application of aluminum packaging bags (VMPET bag)rarely.
5) Cooking purposes
Aluminum foil bags can be used for 121 degrees, 135 degrees cooking, but the aluminum packaging bags (VMPET bag)can not be used for cooking.
6) price
Aluminum foil bags are higher than aluminum bags(VMPET bag).