Now the living standard has improved, and it is basically rice vacuum packaging bags. This can improve the shelf life of rice and keep it fresh for a longer time, which is more conducive to the sale of rice.
Extended data:
The main functions of vacuum inflatable packaging are not only the function of oxygen removal and quality assurance, but also the functions of pressure resistance, gas resistance and freshness preservation, which can effectively keep the original color, fragrance, taste, shape and nutritional value of food for a long time. In addition, many foods are not suitable for vacuum packaging, but must be packed by vacuum inflatable packaging.
After the food is vacuum inflated, the inflation pressure in the packaging bag is greater than the atmospheric pressure outside the packaging bag, which can effectively prevent the food from being crushed and deformed without affecting the appearance, printing and decoration of the packaging bag. Vacuum inflatable packaging is filled with single gas of nitrogen, carbon dioxide and oxygen or mixed gas of two or three gases after vacuum.
Its nitrogen is an inert gas, which plays a role in filling, keeping the inside of the bag at a positive pressure, so as to prevent the air outside the bag from entering the bag and play a protective role for food.
Its carbon dioxide can be dissolved in all kinds of fats or water, which leads to carbonic acid with weak acidity, and has the activity of inhibiting microorganisms such as mold and spoilage bacteria. Its oxygen can inhibit the growth and reproduction of anaerobic bacteria, keep the freshness and color of fruits and vegetables, and high concentration of oxygen can keep fresh meat bright red.
References:
Baidu Encyclopedia-Vacuum Packaging Bag