Main products: aluminum foil bag, vacuum bag, shielding bags, aluminum bags, board vacuum bags, cooking food vacuum bag, nylon vacuum bag, anti-static metal bags and other packaging materials. Shanghai Yangtze vacuum bags vacuum bags / Jiangsu, Zhejiang, vacuum bags vacuum bags vacuum bags factory price to see more similar products Kunshan Chi Shing Packaging Materials Co., Ltd. specializing in the production of various types of moisture-proof foil bags, vacuum bags, shielding bags, plastic package bag, foam board and other composite bag, my company's products have moisture, light, high barrier characteristics, the production of printing and packaging bags for various types of food, composite, mechanical electronics, optoelectronics antistatic electronic shielding products, high and low vacuum flexible packaging and other industry-related products, price good quality These are the details Shanghai vacuum bags vacuum bags, Zhejiang, Shanghai if you vacuum bags vacuum bags, Zhejiang price, model, pictures have any questions, please contact us for Shanghai, Jiangsu vacuum bags vacuum bags of the latest information. Also known as decompression vacuum packaging, is based on the principle of atmospheric pressure, the main role of the vacuum bag is oxygen, in order to help prevent food spoilage or deterioration. Vacuum packaging is to package food bags and oxygen within the cell by pumping deprived, so that microbial processes lose "living environment". Vacuum also prevents oxidation of food, so the food does not taste, deterioration to reduce the loss of vitamin A and C. Definition vacuum bags: refers to the product was added to airtight containers, removing the air inside the container, so that to achieve a predetermined degree of vacuum in the container after sealing a packaging method.