Main products: aluminum foil bag, vacuum bag, shielding bags, aluminum bags, board vacuum bags, cooking food vacuum bag, nylon vacuum bag, anti-static bags and other packaging materials, metal. Food industry: packaging mushrooms, fungi, fresh vegetables, meat, fruit, food industry, meat, sauce products, spices, dried fruit, soy products, chemicals, medicinal granules, powders, liquids and other vacuum packaging electronic products: such as semiconductors, crystal, IC, PCB, metal processing parts of moisture, oxidation discoloration, fabrics, cotton, wool and other items of a vacuum packaging, vacuum packaging of food into the definition of vacuum-packed bags, out of the bag air inside, after reaching a predetermined degree of vacuum, complete the sealing process. Filling the vacuum packed food into the bags, packaging bags out of the air after reaching a predetermined degree of vacuum, and then filled with nitrogen or other gas mixture, and then complete the sealing process. 2, the main mechanism of action is vacuum-packed oxygen, in order to help prevent food spoilage, the principle is relatively simple, mainly because of deterioration of food mold rot caused by microbial activity, but most microorganisms (such as yeast and mold) of need oxygen to survive, but the principle is the use of vacuum packaging, the packaging bag and food cells deprived of oxygen, so that the micro-material objects lose the "survival of the environment." Experimental results show: When the oxygen concentration packaging bags ≤1%, rate of growth and reproduction of microorganisms on a sharp decline in oxygen concentration ≤0.5%, most microorganisms will be inhibited and stop breeding. (