The same as the other types of flexible packaging,the gusset bag are constituted by material structure.As per the different usage and barrier characteristic,it can be divided into many kinds of material structure.here we only introduce some common used gusseted pouch bag materials structure for your reference,not expalin theirs specific functions.
BOPP/LLDPE
BOPP/Metalized-PET/LLDPE
PET/Metalized-PET/LLDPE
PET/AL/LLDPE
Kraft paper/AL/LLDPE
BOPP/Metalized-PET/LLDPE
PET/Metalized-PET/LLDPE
PET/AL/LLDPE
Kraft paper/AL/LLDPE
Please note that as the flat bottom gusseted bag is not suitable for the liquid or semi-liquid packaging,so its material structure is fewer than the one of bag with side gusset.