Several principles of vacuum packaging bags, how to choose and buy

Vacuum packaging bag customization, the vacuum and vacuum-filled flexible packaging technology for food, occupies a certain position in the food packaging technology, and some functions and functions cannot be easily replaced by other packaging technologies. my country’s vacuum packaging machine technology was developed in the early 1980s, while vacuum inflatable packaging technology began to be used in a small amount in the early 1990s. With the promotion of small packaging and the development of supermarkets, its scope of application will become more and more. Widespread, some will gradually replace hard packaging, the prospects are very promising.

The working principle of the vacuum packaging machine is to extract the oxygen in the packaging bag and in the food cells, so that the microorganisms lose the "survival environment", because the mildew and spoilage of food are mainly caused by the activities of microorganisms, and most microorganisms (such as molds and molds) Yeast) needs oxygen to survive. However, experiments have shown that when the oxygen concentration in the packaging bag is less than or equal to 1%, the growth and reproduction speed of microorganisms will drop sharply. If the oxygen concentration is less than or equal to 0.5%, most microorganisms will be inhibited and stop reproducing. (Note: Vacuum packaging cannot inhibit the growth of anaerobic bacteria and the deterioration and discoloration of food caused by enzyme reactions, so it needs to be combined with other auxiliary methods, such as refrigeration, quick freezing, dehydration, high temperature sterilization, irradiation sterilization, microwave sterilization, salt Marinated etc.)

Vacuum packaging bag customization, in addition to the oxygen-removing and quality-preserving functions of vacuum packaging, it also has the functions of anti-compression, gas barrier, and preservation, which can more effectively maintain the original color, aroma, taste and shape of the food for a long time. And nutritional value. In addition, there are many foods that are not suitable for vacuum packaging, but must be vacuum-filled packaging. Such as crispy and fragile foods, foods that are easy to agglomerate, foods that are easy to deform and run out of oil, foods with sharp edges or corners or high hardness that will pierce the packaging bag, etc. After the food is vacuum-inflated and packaged, the inflation pressure inside the packaging bag is stronger than the atmospheric pressure outside the packaging bag, which can effectively prevent the food from being crushed and deformed under pressure, and does not affect the appearance of the packaging bag and the printing and decoration.

Vacuum packaging bag customization, the vacuum packing bag is filled with nitrogen, carbon dioxide, oxygen single gas or a mixture of 2-3 kinds of gases after being vacuumed. Among them, nitrogen is an inert gas, which plays a filling role and keeps positive pressure inside the bag to prevent air outside the bag from entering the bag and play a protective role for food. Oxidized carbon gas can be dissolved in various fats or water to form weakly acidic carbonic acid, which has the activity of inhibiting molds, spoilage bacteria and other microorganisms. Oxygen can inhibit the growth and reproduction of anaerobic bacteria, and maintain the freshness and color of fruits and vegetables. High concentration of oxygen can make fresh meat maintain its bright red color.

Vacuum or vacuum inflatable packaging machines are commonly used in two models: internal vacuum packaging machine and external vacuum packaging machine. The internal pumping vacuum packaging machine is divided into vacuum packaging machine and vacuum inflatable packaging machine. The external pumping packaging machine has several functions such as vacuum packaging machine, vacuum inflatable packaging, and so on, so it is also called multifunctional modified atmosphere packaging machine. To purchase a vacuum packaging machine, you need to consider comprehensive factors such as the shape of the packaged items, the size of the packaging capacity, the production batch, and the method of packaging to be used. First consult with chouqin packaging and then determine the vacuum packaging bag customization