Before putting food into the refrigerator, use the fresh bag to pack up, prevent food string flavor at the same time, also extend the fresh-keeping time. This is a common method for keeping food fresh. However, it is not difficult to find that the food in the plastic bag will rot in a few days even if it is kept at a low temperature. The main culprit is probably the spoilage of the food caused by the growth of bacteria. Food spoilage has a lot to do with temperature, humidity and bacterial growth. Refrigerators provide the right temperature and humidity for keeping food fresh, but they don't prevent bacterial growth. Bacteria are very small and ubiquitous, the traditional bag can not kill bacteria, so the preservation effect is greatly compromised. In view of this problem, the anti-bacterial fresh-keeping bag emerges as the Times require. What are the differences and similarities between the anti-bacterial fresh-keeping bags and the ordinary fresh-keeping bags? The following points are listed: 1, Material: fresh bag is used to preserve vegetables, fruits, grains, cooked food and other food bags, in daily life is very widely used. Its material basically has polyethylene (PE) , polyvinyl chloride, acrylate to wait, among them polyvinyl chloride can not be used to pack cooked food directly. The anti-bacterial fresh-keeping bag is also made of the above materials, but the anti-bacterial agent is added in the bag to make it have the function of anti-bacterial. APPEARANCE: The ordinary fresh-keeping bag is transparent and thin. The transparency of the anti-bacterial fresh-keeping bag may be affected by the addition of anti-bacterial agent, so we should pay attention to this problem when choosing anti-bacterial agent, the silver ion anti-bacterial solution developed by Huixin can guarantee the anti-bacterial durability and safety without affecting the transparency of the bag. 3, fresh effect: Ordinary fresh-keeping bag can guarantee the humidity of food, let the loss of water of food slow down, but can not prevent the growth of bacteria, so fresh effect is limited, and short time. The anti-bacterial fresh-keeping bag can not only lock the water content of food, but also prevent the growth of bacteria and reduce the possibility of spoilage, so as to keep fresh for a long time. The results show that the common fresh-keeping bag can keep fresh for 4 days at normal temperature, but the antibacterial fresh-keeping bag can keep fresh for 9 days, its fresh-keeping time is more than twice as long as the ordinary fresh-keeping bag!