Transparent vacuum bag is the biggest advantage of cost advantage, relative to the glass transparent vacuum bag packaging, aluminum foil packaging and other plastic packaging, to achieve the same effect of the barrier coextruded films have great advantages in cost. Because the process is simple, the cost of production of the film products and dry type composite films can be reduced because of 10-20% transparent vacuum bag the advantage and important role compared with other composite films, so it is widely used in various industries, such as Roasted Duck, Roasted Chicken, Salted Duck Egg, beef, rice, millet, mung bean, walnut, fruit and other food, need such a transparent vacuum bag packaging. It is the use of the performance of different plastic material barrier the great differences, coextruded films of oxygen, water, carbon dioxide, odor effect. High barrier is often called vacuum packaging, is based on the principle of atmospheric pressure, and it is transparent The main function of the empty bag is oxygen, to help prevent food spoilage or deterioration. Moreover, it is very powerful: oil resistant, resistant to moisture, high temperature cooking 120 degrees Celsius, freezing resistance, durability, preservation, and smell, can be used for vacuum packaging, aseptic packaging, inflatable packaging