Nitrogen is an inert gas, in the packaging of food, vacuum inflatable packaging into the food bag, take out the air in the bag to reach the predetermined vacuum degree, and then fill the nitrogen, and then complete the sealing process. Vacuum nitrogen-filled packaging is beautiful, generous, and can be intuitive to its true shape. Some fried food or fruit and vegetable chips, using vacuum nitrogen filled packaging, can effectively prevent food rancidity or extrusion, extend the storage time.

The use of nitrogen, the author is recommended to use the Trojan nitrogen machine, because the nitrogen machine can directly produce nitrogen, as long as the pipe is connected with the packaging machine can produce nitrogen, while packaging. And the nitrogen machine is fully automatic operation, turn on the power and air source for more than 20 minutes to produce qualified nitrogen, and do not need frequent replacement, but also can use the gas storage tank to store nitrogen, to be used directly when needed.