There are generally two structures of ton bag film, namely PE/PA/AL/PE, PET/AL/PA/PE.
Aluminum foil has very high barrier properties, high temperature resistance, and light protection
PE has thermal bonding properties. After the PA/AL is coated with a layer of PE, it can be used to bond other materials .
PET film has high temperature resistance, good rigidity and high strength, suitable for printing
PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, and has a low coefficient of friction and a certain flame retardancy.