Bulge bag vacuum packing food processing products is mainly caused by some microbes in packing and gas.
Vacuum packing is different from the aseptic packaging, if incomplete sterilization after vacuum sealing, some microbes (
Especially the anaerobic microbes)
Still can grow, produce gas causing the bulge bag.
Absolutely not edible after vacuum packaging products get a bag.
Food after bagging, the last procedure to hot pressing sealing bag, and this procedure, the quality of high and low will directly affect the sealing performance of the packaging bags.
If the sealing side is lax, lead to the bags leak, the air will penetrate the vacuum bags from bags leak area.
The permeability of packaging is too large which is another cause of the food up bag.